Energy Consulting Companies in the UK: 952 Active Firms (2026)
Energy consulting companies in the UK advise organisations on energy strategy, procurement, efficiency, and regulatory compliance.
Buying centres usually sit in finance, estates, sustainability and infrastructure teams, with procurement directors and facilities leaders acting as day-to-day sponsors. The buyer is often a commercial, public sector or infrastructure organisation with multi-site energy use, internal reporting obligations and a need to evidence savings. Engagements tend to range from short procurement reviews to longer strategy, efficiency and compliance programmes, usually delivered by specialist consultants, analysts, engineers or project staff. The more credible suppliers are advisory-led, rather than commodity suppliers or equipment sellers with a consultancy wrapper.
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Across the UK, 952 energy consulting companies are actively trading. Reported headcount totals 2,538 people, pointing to a market made up largely of specialist advisory teams rather than labour-intensive delivery organisations. The commercial centre of gravity sits with firms that can interpret tariffs, procurement options and operational energy use for clients with multiple sites or infrastructure assets. A smaller subset has moved into higher-revenue territory, but the typical operator still looks closer to a focused consultancy than to a full-service energy outsourcing group.
The main market-structure distinction is between advisory-led project work and energy supply or equipment-only sales. Clients usually need advice that can withstand internal audit, public tender scrutiny and scrutiny from finance teams, particularly where procurement recommendations sit close to supplier selection. Compliance work also tends to overlap with estates management, carbon-reporting expectations and evidence of efficiency savings. That creates a natural advantage for consultancies able to separate analysis, procurement governance and implementation oversight, while thinner propositions can look exposed if they rely mainly on broker-style switching activity.
Lean advisory teams appear likely to remain common, especially where founders or senior specialists carry much of the client relationship themselves. Demand tends to follow energy-price volatility, estate rationalisation and internal pressure to make procurement decisions more auditable, rather than a single software-style adoption curve. Scale-up scarcity may persist because consulting revenue is tied to expert capacity and repeat trust, not just distribution. Consolidation appears plausible around firms with public sector access, infrastructure knowledge or recurring compliance work, while smaller specialists may continue to occupy defensible niches in procurement, efficiency and operational energy advice.
What’s in the file
One row per company, 50+ columns — everything below plus each company’s verified directors, from Companies House filings.
Company data
Verified directors — included
952
Active firms
2026
76
Revenue over £5M
Companies above the £5M band
124
Recent incorporations
Incorporated since 2022
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Key facts
About 7% of the trading cohort reports turnover above £5M (76 of 952 firms) — the rest sits below that revenue band.
13% of the cohort was incorporated since 2022 (124 firms), so a sizeable share is in its first few filing cycles.
Energy consulting work usually cuts across finance, estates and risk, especially where procurement choices affect budgets as well as operations.
Procurement-led advisers, efficiency and estates consultancies, and compliance-focused specialists tend to have different buyer relationships and sales cycles.
Regulatory compliance is a recurring part of the market, with advisers helping clients interpret energy-related duties alongside contract and efficiency work.
Revenue bands should be read alongside operating model, since energy procurement and advisory businesses do not all scale through the same staffing pattern.
Top UK Energy Consulting companies
Financial sub-scores
Computed from 3 filingsProvides energy consultancy services for businesses, including electricity and gas procurement, utility cost management, invoice validation, revenue recovery, and regulatory compliance support such…
Serves UK businesses with significant utility needs, including commercial property operators, data centres, telecoms firms, healthcare providers, hospitality groups, manufacturers and retailers.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 2y
Location
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Computed from 3 filingsProvides energy and utility consultancy services for businesses, including electricity, gas and water procurement, energy risk management, usage monitoring, compliance support, carbon reporting and…
Sells to UK businesses seeking commercial energy, water and sustainability support, including multi-site organisations, property managers, and companies needing procurement, compliance, net zero…
Financial Health
StrongStrong · Hiring · 12% CAGR over 2y
Location
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Computed from 3 filingsProvides energy consulting services for businesses, including energy procurement and management, efficiency audits and technology implementation, regulatory compliance support (ESOS and SECR),…
Serves UK businesses of all sizes, especially energy-intensive organisations and companies needing support with sustainability, energy costs, carbon reduction, and ESOS/SECR compliance.
Financial Health
StrongStrong · Hiring · 50% CAGR over 2y
Location
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Computed from 5 filingsProvides business energy consultancy services, including energy procurement, supplier comparison, bill validation, and utility management. Advises organisations on carbon compliance, energy…
Serves UK businesses of all sizes, including organisations with significant utility spend, multi-site operations, carbon reporting duties, or energy compliance obligations.
Financial Health
HealthyHealthy · Hiring · 8% CAGR over 4y
Location
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Computed from 5 filingsProvides consultancy and brokerage services for business energy and water supply, including energy purchasing, portfolio management, bill validation, compliance support, consumption analysis and…
Serves businesses and organisations managing energy, water and sustainability needs, with sector focus on manufacturing, education, hospitality, retail, transport, logistics and distribution.
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
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Computed from 2 filingsProvides energy consultancy services to businesses, including energy procurement, risk management, metering and bureau services. Conducts cost recovery audits, manages utility data and billing, and…
Serves large UK businesses and multi-site organisations, including manufacturers, hospitality groups, logistics firms, cultural bodies and corporate supply chains, typically through energy,…
Financial Health
DistressedDistressed · -26% CAGR over 1y
Location
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Computed from 3 filingsProvides consultancy services to industrial and public sector organisations on energy efficiency, decarbonisation and cost reduction. Conducts feasibility studies, engineering design and project…
Serves private and public sector organisations, especially industrial businesses and clusters across the UK, with buyers in operations, engineering, sustainability, finance and compliance roles.
Financial Health
WeakWeak · -6% CAGR over 2y
Location
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Computed from 5 filingsProvides commercial energy consultancy and utility management services, including energy procurement, contract management, bill validation, consumption reporting and market monitoring. Advises on…
Serves industrial and commercial organisations and public sector bodies, including data centres, automotive, manufacturing, education, estate management, retail and hospitality customers.
Financial Health
HealthyHealthy · -12% CAGR over 4y
Location
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Computed from 5 filingsProvides energy procurement and contract management services for businesses, including fixed and flexible energy purchasing, bill validation, energy reporting, budgeting and forecasting, and…
Serves businesses, public sector organisations and energy-intensive sectors such as data centres and manufacturing, targeting teams responsible for energy, sustainability, net zero and compliance.
Financial Health
DistressedDistressed · -60% CAGR over 4y
Location
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Computed from 4 filingsProvides energy consultancy and management services for businesses, including procurement of gas, electricity and water, bill validation, energy efficiency audits, compliance support (e.g., ESOS,…
Serves UK businesses and public sector organisations buying commercial energy services, particularly in manufacturing, hotels and leisure, education, retail, and commercial property. Targets…
Financial Health
HealthyHealthy · Hiring · 5% CAGR over 3y
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Computed from 5 filingsProvides energy and utility consultancy services including energy procurement, carbon and sustainability compliance reporting, energy management, bill validation, and market intelligence, as well as…
Serves UK businesses, institutions and public-sector organisations with sites or property portfolios, including banks, schools, universities, housing associations and hospitality/leisure operators.
Financial Health
DistressedDistressed · -17% CAGR over 5y
Location
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Computed from 4 filingsProvides energy and carbon management consultancy for commercial and industrial organisations, including energy monitoring and bureau services, measurement and verification, ESOS and SECR compliance…
Serves businesses and public-sector organisations across industry and commerce, including large estates, retailers, stadia, NHS bodies and facilities or procurement teams responsible for energy,…
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 3y
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Computed from 4 filingsProvides energy management and sustainability consultancy services, including energy procurement, monitoring and auditing, carbon footprint assessment, net zero and decarbonisation planning,…
Serves organisations across the UK and Europe, including construction, energy, finance, hospitality, life sciences, logistics, multi-academy trusts, manufacturing, private equity, public sector, real…
Financial Health
StableStable · Hiring · 37% CAGR over 3y
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Computed from 5 filingsProvides energy procurement, consulting and management services for industrial and commercial clients. Arranges and manages business energy supply contracts for electricity, gas, oil, water and…
Sells to UK businesses in the industrial and commercial sectors, serving organisations across a wide range of industries that buy business energy, including electricity, gas, oil, water and renewable…
Financial Health
WeakWeak · 2% CAGR over 5y
Location
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Computed from 4 filingsProvides energy management consulting for businesses, including utility bill reviews, energy procurement, contract management, and energy efficiency audits. Offers consumption analysis, carbon…
Serves businesses that buy and manage gas, electricity and water, particularly organisations needing support with energy contracts, utility billing, consumption monitoring and carbon reporting.
Financial Health
StrongStrong · Growing · 0% CAGR over 2y
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Computed from 4 filingsProvides energy and utilities consultancy and technology services including energy procurement, bill validation and bureau services, water and waste management, carbon compliance, building energy…
Serves public and private sector organisations, including social housing providers, landlords with communal heat networks, public-building operators and businesses managing multi-site utility usage.
Financial Health
StrongStrong · -29% CAGR over 1y
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Computed from 4 filingsProvides energy consultancy services to businesses and energy generators, including energy procurement, contract strategy, risk management, power purchase agreement structuring, carbon reporting, and…
Serves B2B energy consumers and generators, including UK companies with large or complex energy contracts, generation asset owners, and organisations with net zero, carbon reporting or energy…
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 3y
Location
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Computed from 5 filingsProvides energy and utility consultancy for commercial and industrial businesses. Advises on energy supply contracts, procurement, compliance schemes, and cost reduction, and supports services such…
Serves small and medium-sized enterprises and industrial and commercial organisations in the UK with significant energy usage, including businesses managing supply contracts, carbon reporting,…
Financial Health
StableStable · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides consultancy and procurement services for business utilities including electricity, gas, water, telecoms and waste. Negotiates supply contracts, analyses energy usage, validates bills, and…
Serves UK businesses managing commercial utility contracts, especially care homes, hotels, restaurants, manufacturers and multi-site operators seeking support with energy, water, telecoms and waste…
Financial Health
StableStable · Hiring · 8% CAGR over 4y
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Computed from 5 filingsProvides energy consultancy services including energy procurement and supplier contract negotiation, management of energy efficiency and carbon reduction projects, and development of energy…
Serves B2B clients with significant energy use, including property owners, facilities and estates teams, and organisations managing energy procurement, building operations, cost pressures and…
Financial Health
StableStable · Profitable · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides energy consultancy and management services for businesses, including energy procurement, contract negotiation, bill validation and bureau services, consumption optimisation, compliance…
Serves businesses of all sizes across the UK, including organisations with multi-site operations, property management needs, utility metering requirements, and energy or environmental compliance…
Financial Health
StrongStrong · Growing, Hiring · 26% CAGR over 4y
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Computed from 5 filingsProvides energy and sustainability consultancy for businesses, including energy audits, ESOS compliance, carbon footprinting, ISO 14001 support, utility metering and management, sub‑metering…
Serves B2B clients, especially corporate real estate owners, asset managers, property advisors and large multi-site organisations needing energy, sustainability and compliance support.
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 4y
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Computed from 5 filingsProvides energy and carbon consultancy for industrial and energy‑intensive businesses, including energy procurement, purchasing strategy, billing validation, and supply connections. Advises on carbon…
Serves B2B energy-intensive manufacturing and industrial processing businesses, including paper, plastics, dairy and food production companies with significant energy use and regulatory obligations.
Financial Health
StrongStrong · Growing, Hiring · 24% CAGR over 4y
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Computed from 3 filingsProvides energy consultancy and services for businesses, including solar power system design and installation, energy procurement and contract management, Climate Change Levy mineral and metallurgy…
Serves commercial and industrial businesses across the UK, especially energy-intensive organisations such as manufacturers, metal/mineral processors, logistics firms and facilities managers.
Financial Health
StableStable · 0% CAGR over 2y
Location
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Computed from 5 filingsProvides building services engineering and energy consultancy, including HVAC system design, restoration, inspection and commissioning, energy management, ESOS compliance, sustainability and…
Serves B2B and public-sector clients, including industrial and commercial organisations and local authorities, especially property, estates and facilities teams responsible for buildings and energy…
Financial Health
StableStable · -5% CAGR over 4y
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Computed from 5 filingsProvides commercial utility consultancy and brokerage services including energy procurement, energy management, renewable and solar solutions, compliance support, and energy audits. Also advises…
Serves businesses seeking commercial utility support, particularly organisations managing energy costs, procurement, compliance, sustainability and net-zero requirements.
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 4y
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Computed from 5 filingsProvides energy consultancy and utility management services for businesses, including energy procurement, utility connection setup, invoice validation, and energy data management platforms. Also…
Serves businesses, from sole traders and SMEs to large nationwide corporate clients, including organisations with CSR, net zero or utility compliance requirements.
Financial Health
StrongStrong · Growing, Hiring · 15% CAGR over 4y
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Computed from 5 filingsProvides a procurement and delivery framework for NHS trusts and local authorities to develop energy infrastructure and decarbonisation projects, including securing finance, procuring contractors,…
Serves UK public sector organisations, particularly NHS trusts, hospitals and local authorities, working with estates, capital projects and finance teams responsible for energy infrastructure and…
Financial Health
StrongStrong · Growing, Hiring · 22% CAGR over 4y
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Computed from 3 filingsProvides building engineering and sustainability consultancy services including energy management, energy audits, compliance assessments, technology evaluations and decarbonisation planning. Helps…
Serves public sector bodies and large commercial organisations with building estates, including clients in education, healthcare, retail, leisure, industrial, residential, commercial and public…
Financial Health
HealthyHealthy · 4% CAGR over 2y
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Computed from 5 filingsProvides energy and water consultancy for commercial and public sector clients, including procurement and tendering for gas and electricity contracts, tariff checks, bill validation, account…
Serves businesses, government bodies and private-sector organisations managing commercial energy and water contracts, including corporate sites and commercial premises with gas, electricity or water…
Financial Health
StableStable · -4% CAGR over 5y
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Computed from 5 filingsProvides energy consultancy and renewable energy services for businesses, including energy procurement, energy management, and strategy development. Supports installation of solar PV, combined heat…
Serves UK businesses and public-sector organisations seeking green energy solutions, including property managers, manufacturers, corporates, wholesalers, transport operators, schools, councils,…
Financial Health
HealthyHealthy · Hiring · 7% CAGR over 4y
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Computed from 3 filingsProvides energy consultancy and technical services, including energy assessments, compliance reporting (DEC, TM44, ESOS, SECR), and development of carbon reduction strategies, heat decarbonisation…
Serves organisations with energy and carbon compliance obligations, including large businesses and public-sector or non-domestic building operators seeking net zero planning and decarbonisation…
Financial Health
HealthyHealthy · Hiring · 25% CAGR over 2y
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Computed from 5 filingsProvides energy procurement and utility management consultancy for businesses and property organisations. Services include contract procurement, invoice validation, revenue recovery, tenant metering…
Serves UK businesses and organisations with significant utility spend, especially property management companies, multi-academy trusts, trade organisations, and domestic or commercial landlords…
Financial Health
HealthyHealthy · Hiring · 30% CAGR over 4y
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Computed from 3 filingsProvides consultancy services for low‑carbon district heating and heat network projects. Supports local authorities, housing associations and developers with feasibility studies, commercial…
Serves UK public-sector bodies and B2B clients involved in heat networks, including local authorities, housing associations, housing developers, major landowners, social housing providers and…
Financial Health
HealthyHealthy · Growing, Hiring · 164% CAGR over 2y
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Computed from 4 filingsProvides energy management and consultancy services for businesses, including energy audits, monitoring systems, ESOS and SECR compliance support, and carbon accounting. Supplies and installs…
Serves large organisations and commercial businesses with significant energy spend, including manufacturers, food producers, education providers, councils and other operators seeking energy and…
Financial Health
HealthyHealthy · -4% CAGR over 6y
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Computed from 5 filingsProvides procurement, cost management and carbon reduction consultancy to organisations. Services include supplier contract negotiation, energy and cost analysis, carbon footprint reporting, and…
Serves organisations across charities, education, healthcare and housing, hospitality, logistics, manufacturing, professional services, retail and construction, targeting leaders responsible for…
Financial Health
HealthyHealthy · -68% CAGR over 4y
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Computed from 5 filingsProvides energy auditing and consultancy services, including ESOS assessments, EPC and DEC certification, SECR reporting, and TM44 air‑conditioning inspections. Advises organisations on energy…
Serves educational institutions, commercial property owners and managers, and public sector bodies including local authorities and government organisations with energy, carbon and building compliance…
Financial Health
StrongStrong · Growing, Hiring · 17% CAGR over 4y
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Computed from 3 filingsProvides consultancy and brokerage for business energy and water procurement. Reviews usage and contracts, negotiates tariffs with utility suppliers, manages switching, and advises organisations on…
Serves UK businesses and corporate organisations with energy, water and sustainability needs, including buyers responsible for utilities contracts, cost control, compliance and net zero objectives.
Financial Health
StableStable · 4% CAGR over 2y
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Computed from 3 filingsProvides energy risk management and consulting services for large energy users, including electricity hedging strategies, energy procurement support, market analysis, and development of renewable…
Serves large businesses and major energy users with operations in the UK and mainland Europe, including corporate facilities, procurement, logistics, banking, waste management and energy-sector…
Financial Health
StrongStrong · Growing, Hiring · 20% CAGR over 2y
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Computed from 5 filingsProvides energy procurement and consultancy services for businesses, including utility tendering, market intelligence, energy reporting, compliance support, and account management. Advises…
Serves small, medium and large businesses and organisations with significant utility needs, including energy-intensive industries, plastics manufacturers and financial services firms, with coverage…
Financial Health
StrongStrong · Growing, Hiring · 2% CAGR over 5y
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Computed from 5 filingsProvides energy consultancy for commercial and industrial clients, including electricity and gas contract procurement and negotiation, energy connections, compliance reporting (CRC and ESOS),…
Serves B2B customers in retail, commercial and industrial sectors, particularly organisations with electricity and gas contract, site connection, energy portfolio or compliance requirements.
Financial Health
HealthyHealthy · -6% CAGR over 4y
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Computed from 5 filingsProvides energy consultancy and brokerage services for businesses and public sector organisations, including energy procurement, flexible purchasing and risk management, energy usage reporting, bill…
Serves professional, service-based organisations, public sector bodies and private businesses, plus strategic partners such as accountancy and advisory firms with client bases needing energy support.
Financial Health
StableStable · -5% CAGR over 4y
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Computed from 4 filingsProvides specialist energy consultancy focused on power systems analysis, electricity network design, grid connection support and curtailment analysis. Advises developers, network operators and…
Serves electricity network operators, regulators, local authorities and other public sector bodies, plus private onshore and offshore renewable energy developers seeking to connect projects to…
Financial Health
HealthyHealthy · -59% CAGR over 3y
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Computed from 5 filingsProvides energy and low‑carbon consultancy services, including energy management, ESOS compliance support, strategy development, feasibility studies, and technical analysis. Advises organisations on…
Serves large corporations, public sector organisations, property developers, investors and landowners needing energy and low-carbon project support, mainly in the UK with some work across Europe.
Financial Health
StrongStrong · Growing, Hiring · 41% CAGR over 4y
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Computed from 3 filingsProvides energy consultancy for businesses including energy audits, monitoring and metering, carbon and net‑zero planning, regulatory compliance support (ESOS, SECR, EPC), and design, supply,…
Serves UK businesses, including leading brands and multi-site operations across sectors, with buyers responsible for energy costs, regulatory compliance, sustainability and net-zero targets.
Financial Health
StrongStrong · Growing, Hiring · 20% CAGR over 2y
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Computed from 5 filingsProvides consulting, development, financing and implementation of energy infrastructure upgrades, including energy efficiency and zero‑carbon generation projects. Delivers projects for public and…
Serves public and private sector organisations across the UK and Ireland, including councils, colleges and accommodation providers seeking to reduce energy use and progress toward net zero carbon…
Financial Health
StrongStrong · Hiring · 46% CAGR over 5y
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Computed from 5 filingsProvides engineering consultancy, design and project management for renewable and low‑carbon energy systems. Services include feasibility studies, masterplanning, procurement support and…
Serves public sector bodies, large utility companies and organisations developing district heat, decentralised renewable energy and energy efficiency projects across the UK.
Financial Health
StrongStrong · Growing, Hiring · 13% CAGR over 4y
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Computed from 5 filingsProvides energy management and consultancy services to organisations, including energy usage data analysis, identification and development of energy‑saving initiatives, project management of…
Serves businesses and other organisations with significant energy costs, particularly clients lacking internal resource or data to assess usage, justify initiatives and oversee savings projects.
Financial Health
StrongStrong · Hiring · 106% CAGR over 4y
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Computed from 2 filingsProvides advisory and development services for energy and infrastructure projects, including concept development, feasibility studies, business case preparation, strategy and business models,…
Serves public-sector bodies, municipalities, utilities and private infrastructure developers involved in low-carbon urban energy, district energy, renewable gas and infrastructure projects.
Financial Health
WeakWeak · 0% CAGR over 1y
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Computed from 4 filingsProvides energy assessment and compliance consulting for commercial buildings, including non‑domestic EPCs, MEES compliance strategies, ESG and net‑zero planning, and energy and carbon reporting such…
Serves commercial landlords, property asset managers and sustainability teams managing non-domestic building portfolios across the UK, including industrial and commercial real estate owners.
Financial Health
StableStable · Hiring · 30% CAGR over 3y
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How UK Energy Consulting companies work and how to sell to them
What they do
Revenue usually comes from fixed-fee energy audits, tariff and procurement reviews, day-rate advisory, retained monitoring, compliance reporting and programme oversight. Some firms add gain-share or success-fee elements where savings can be measured, but most still need client trust before attaching fees to supplier switching or efficiency outcomes. The service shape is professional advice backed by energy analysis: gathering metering and invoice evidence, modelling procurement options, challenging usage assumptions, and turning technical findings into board, estates or tender documentation. Delivery capacity is therefore tied to consultant time, engineering judgement and repeatable analytical processes, not just software licences or brokerage volume.
Who they sell to
Most clients are estates-heavy organisations with material energy exposure: commercial property groups, manufacturers, logistics operators, infrastructure owners, local public bodies and other multi-site buyers. Sponsors tend to sit in finance, procurement, estates, sustainability or facilities, with technical input from energy managers and engineering teams. Tactical reviews can be bought directly by a functional head, while larger programmes usually involve formal procurement, framework routes, tender scoring and legal review. Sales cycles are therefore split: relatively quick for a bill validation or procurement health-check, slower when the work affects supplier selection, capital projects or public-sector reporting.
What they buy
Energy consulting firms tend to buy the operating stack of a project-based advisory business, plus tooling that helps them handle messy client energy information. Common needs include CRM, proposal and bid management, professional-services automation, time recording, project accounting, document management, cyber security, HR, recruitment and training support. More sector-specific spend often sits around invoice validation, metering ingestion, consumption analytics, carbon reporting, tariff modelling and workflow tools for evidence packs. They may also buy legal, insurance and quality-management support where procurement recommendations, public-sector tenders or implementation advice increase professional liability.
Why and how to sell to them
Energy consulting buyers tend to evaluate vendors when manual analysis starts to limit billable work, when a new public-sector or infrastructure contract raises governance demands, or when hiring plans expose weak delivery processes. Price volatility can bring inbound demand, but it also creates pressure to explain recommendations clearly and avoid looking like a commodity broker. Useful outbound angles are usually operational rather than grand: faster preparation of audit trails, lower rework in client reporting, better utilisation visibility, clearer bid qualification, and cleaner handover from advisory teams to implementation oversight.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
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Frequently asked questions
How many energy consulting companies are there in the UK?
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