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Carbon and Climate Companies in Leeds: 25 Active Firms (2026)
Carbon and climate companies in Leeds measure, reduce and manage emissions, climate risk and low-carbon projects across the city region.
Buying centres tend to sit with finance, estates, operations and sustainability teams, with procurement shaped by auditability as much as by environmental intent. Work is typically sold to owner-managed SMEs, local public-sector bodies, property and infrastructure operators, and larger businesses needing outside capacity for carbon accounting, energy and resource efficiency, climate reporting or project delivery. Engagements appear relatively practical: scoped assessments, retained advisory support, supplier evidence packs and implementation programmes, rather than open-ended strategy exercises. The commercial sweet spot is specialist expertise that can translate emissions, cost and compliance language for non-specialist buyers.
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Leeds has 25 actively trading carbon and climate companies in this list, making it a compact local cohort rather than a broad horizontal software market. Their reported headcount is 178, which fits the profile of small delivery teams working across advisory, reporting and low-carbon project execution. The employment footprint also suggests a service-heavy market: capacity sits in practitioners who can gather evidence, model reductions and manage delivery with client finance, estates and operations teams. For researchers, the useful reading is less about local corporate scale and more about specialist coverage across the city region.
Formal oversight in this area tends to come through buyer requirements, audit standards and contract terms rather than a dedicated licence regime for every supplier. Carbon accounting, climate reporting and reduction advisory work is judged on method, evidence retention and whether assumptions can withstand finance, board or external-review scrutiny. Public-sector and infrastructure buyers in Leeds tend to add tender rules, delivery milestones and proof of supplier competence; commercial buyers often want outputs that can be used in customer, lender or insurer conversations. That structure favours firms able to document process, not just provide a calculation.
Further development appears likely to be uneven. The cohort is weighted towards specialist SMEs and service-led operators, so growth tends to depend on repeatable methods, trusted referral channels and access to buyers with operational budgets. Scale-up scarcity may persist where work remains bespoke, especially if clients expect advisory, evidence gathering and implementation to be bundled together. Consolidation is possible where complementary practices can combine reporting, reduction planning and delivery management, but the more durable pattern may be a set of focused firms embedded in local procurement and infrastructure relationships.
25
Active firms
2026
1
Over £5M
Revenue threshold
4
Since 2022
Newer incorporations
Key facts
About 4% of the trading cohort reports turnover above £5M (1 of 25 firms) — the rest sits below that revenue band.
16% of the cohort was incorporated since 2022 (4 firms), so a sizeable share is in its first few filing cycles.
Carbon and climate work in Leeds sits close to energy, property and corporate-reporting activity, where buyers often need specialist support rather than general environmental services.
Emissions measurement, reduction planning and climate-risk support are the main service lines for this category.
Project-focused consultancies appear to be a notable part of the local market, particularly where low-carbon delivery spans the wider city region.
Top Leeds carbon and climate companies
1ENERGY Group Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides consultancy and project development services for district energy and low‑carbon heat networks. Conducts feasibility studies and supports the design, financing, construction and operation of…
Serves public- and private-sector organisations in UK cities and towns with significant heating demand, including local authorities, communities and large building operators pursuing net zero targets.
Financial Health
StableStable · Hiring · 104% CAGR over 4y
Location
Paschali Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides energy and environmental consultancy services to businesses, including energy audits and surveys, regulatory compliance reporting, carbon reduction support, energy purchasing, consumption…
Sells to businesses and organisations needing energy, carbon and environmental support, including commercial energy buyers, compliance teams and operations leaders seeking help with utilities,…
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 3y
Location
Greenbox Thinking Solutions Ltd
Trajectory
1y · 2025–NowProvides consulting to construction companies on assessing net zero carbon capability, analysing corporate and project emissions, and sourcing and validating carbon credits to offset embodied and…
Serves B2B construction-sector organisations, including builders, developers and their supply chains across sectors, especially firms responsible for new-build or refurbishment projects.
Financial Health
Insufficient historyInsufficient history
Location
NEW POWER HOLDINGS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsOperates a carbon credit verification and registry platform and develops carbon offset projects. Provides carbon footprint assessments, ISO 14064 training, ESG and carbon strategy advisory, and…
Sells to businesses, public sector bodies and governments seeking carbon credit verification, carbon accounting and sustainability support. Serves organisations running corporate sustainability…
Financial Health
StrongStrong
Location
Provides energy efficiency and renewable energy infrastructure projects, including solar, wind, biogas, energy storage and microgrids. Delivers design, construction, financing and operation of energy…
Serves UK public sector bodies and businesses, including councils, universities, healthcare facilities, retailers, commercial and industrial organisations, utilities, housing providers, data centres…
Location
Tunley Environmental Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides sustainability consulting and environmental assessment services. Conducts carbon footprinting, lifecycle and embodied carbon assessments, biodiversity and water footprint analysis, and…
Serves B2B organisations worldwide, especially airports, architects and developers, construction, manufacturing, chemicals and cleaning, mining and steel, pharmaceuticals and medical devices, ports,…
Financial Health
StrongStrong · Growing, Hiring · 50% CAGR over 4y
Location
WALKER RESOURCE MANAGEMENT LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides environmental and sustainability consultancy services including investment due diligence, environmental permitting, waste strategy, ESG advisory, carbon footprinting, life cycle assessment,…
Serves public and private sector organisations in healthcare, energy, waste and recycling, local authorities, manufacturing and professional services, including investors, regulated operators and…
Financial Health
HealthyHealthy · Hiring · 14% CAGR over 4y
Location
CARBON.CLIMATE.CERTIFIED LTD
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides sustainability consultancy for the built environment, including BREEAM assessments, whole‑life carbon and life cycle analysis, ESG strategy, Well and Fitwel certification support, circular…
Serves B2B clients in the built environment, including organisations managing property, construction or development projects that need support with sustainability goals, ESG requirements and building…
Financial Health
StrongStrong · Growing, Hiring · 17% CAGR over 3y
Location
ELEMENTARY ENERGY LIMITED
Trajectory
5y · 2019–NowFinancial sub-scores
Computed from 5 filingsOperates a hydroelectric power facility and provides technical, engineering, and project management consultancy for renewable energy and sustainable fuel projects, including solar, wind, hydropower,…
Serves governments, renewable energy developers, investors, lenders, infrastructure funds and strategic acquirers involved in solar, wind, hydropower, hydrogen, ammonia, SAF and Power-to-X projects.
Financial Health
HealthyHealthy
Location
BH Energygap
Trajectory
5y · 2019–NowFinancial sub-scores
Computed from 5 filingsDevelops and delivers commercial infrastructure projects focused on waste management and energy‑from‑waste facilities. Plans and manages recycling and waste treatment developments that convert…
Serves UK public-sector and commercial stakeholders involved in household and commercial waste management, alongside communities and partners connected to renewable energy-from-waste projects.
Financial Health
StableStable
Location
BH EnergyGap
Trajectory
5y · 2019–NowFinancial sub-scores
Computed from 5 filingsDevelops and delivers waste treatment and energy‑from‑waste projects that divert household and commercial waste from landfill. Plans and manages recycling facilities and renewable power generation…
Serves businesses and public-sector stakeholders involved in UK waste, recycling, energy-from-waste, and commercial development projects, including partners, developers, investors, and local…
Financial Health
DistressedDistressed · -54% CAGR over 6y
Location
Supplies renewable electricity to industrial and commercial customers using power generated from UK wind and solar farms. Also installs commercial rooftop solar systems and offers power purchase…
Serves UK industrial and commercial businesses seeking renewable energy supply, rooftop solar and carbon reduction support, particularly organisations with ESG, net-zero or supply-chain emissions…
Location
ZECO ENERGY LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides energy management and efficiency services for businesses, using data analysis software to monitor utility consumption, identify savings, support regulatory compliance, manage utility…
Serves businesses and organisations with significant utility use, including academies, accountants, financial institutions, landlords, brokers, facilities management companies, installers, and…
Financial Health
HealthyHealthy · Hiring · 19% CAGR over 4y
Location
Enviro-Leaf Limited
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides environmental and social impact assessment consulting for energy, infrastructure and urban planning projects. Services include environmental impact assessments, life cycle assessments,…
Serves businesses and project developers in renewable energy, infrastructure and urban planning, including solar, hydropower and transmission line projects requiring environmental and social…
Financial Health
WeakWeak · -70% CAGR over 4y
Location
Operates a wind farm generating renewable electricity from onshore wind turbines, supplying power to the grid and to commercial energy customers under renewable energy supply and power purchase…
Serves UK industrial and commercial businesses seeking renewable energy procurement, rooftop solar and PPAs, especially corporate energy buyers with carbon-neutral, ESG and supply-chain emissions…
Location
BH ENERGYGAP (DONCASTER) LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDevelops waste treatment and energy‑from‑waste projects that divert household and commercial waste from landfill. Plans and delivers recycling facilities and renewable energy generation projects…
Serves UK public and private sector organisations involved in household and commercial waste management, renewable energy generation and commercial development projects.
Financial Health
DistressedDistressed · -60% CAGR over 5y
Location
FIRMA ENERGY VENTURES LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops renewable energy projects, collaborating with landowners and local communities to bring clean power generation schemes forward. Focuses on project development, partnerships and technology to…
Serves UK landowners and local communities seeking to host or participate in renewable energy projects.
Financial Health
StrongStrong
Location
Sweco UK
Provides engineering, environmental and design consultancy services for buildings, infrastructure, transport, water and energy projects, including structural and civil engineering, planning,…
Serves public and private sector organisations commissioning built environment and infrastructure projects, including property developers, transport bodies, utilities, energy and water companies,…
Location
Smarta Energy Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides utility management and consultancy services for businesses, including electricity and gas procurement, energy market risk management, energy monitoring and metering, invoice validation and…
Sells to UK business energy consumers and public sector organisations, including schools, local authorities, housing associations, NHS and healthcare providers, emergency services, and government and…
Financial Health
StrongStrong
Location
Supplies 100% renewable electricity from wind and solar farms to industrial and commercial customers. Also installs commercial rooftop solar systems and offers power purchase agreements and energy…
Serves UK industrial and commercial businesses seeking renewable energy options, including companies with ESG, carbon reduction, supply-chain emissions or on-site solar generation goals.
Location
ENTRUST SERVICES LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides planning and environmental consultancy for energy and telecommunications infrastructure projects. Services include planning applications, ecology and landscape assessments, public…
Serves B2B developers, utilities and infrastructure operators in the UK and Ireland, especially energy, telecoms, renewables, grid, water, heat network and storage projects needing planning and…
Financial Health
StableStable · 0% CAGR over 2y
Location
Green Sustainable Energy Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides engineering consultancy, design and project management for renewable and low‑carbon energy systems, including district heat networks, biomass, combined heat and power, heat pumps and solar.…
Serves public sector bodies, large utility companies and commercial organisations involved in renewable, low-carbon, decentralised energy, building efficiency and district heat network projects…
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
Energy Quest International Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides energy management and carbon reduction consultancy, monitoring energy consumption and emissions, producing energy reports through an online platform, and advising organisations on carbon…
Serves businesses and organisations with significant energy usage, especially those tracking energy expenditure, accessing energy reports, and managing carbon reduction obligations.
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
CARBON PLAN ENGINEERING LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides building services engineering and sustainability consultancy, including MEP design, energy modelling, compliance assessments and EPCs. Conducts energy audits and supports net‑zero and carbon…
Serves UK-based organisations and property stakeholders in healthcare, education, commercial, residential and leisure sectors seeking building services and net zero support.
Financial Health
StrongStrong · Hiring · 10% CAGR over 5y
Location
Process Energy Limited
Trajectory
1y · 2023–NowProvides industrial energy consultancy for manufacturing processes, including energy audits, consumption benchmarking, process optimisation, heat recovery system design and installation, and fuel…
Serves B2B manufacturing companies with energy-intensive thermal processes, particularly food, pulp and paper, metal, textiles and printing manufacturers pursuing efficiency and decarbonisation.
Financial Health
Insufficient historyInsufficient history
Location
Q-GEN LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns and installs ground source heat pump systems for commercial buildings, including care homes, hotels and large facilities. Provides bespoke borefield design, system integration and control…
Serves B2B owners, operators and developers of care homes, hotels and large commercial facilities, especially high-demand or regulated buildings needing lower-carbon heating and energy efficiency.
Financial Health
HealthyHealthy · -56% CAGR over 4y
Location
Omega Solutions Cross Hills Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides energy and sustainability consultancy, training, and software platforms focused on reducing energy consumption and carbon emissions. Offers building performance assessments, cloud-based…
Serves businesses seeking to cut energy use and carbon emissions, particularly organisations with buildings, BMS-connected assets and temperature-controlled environments, plus employee teams needing…
Financial Health
StrongStrong
Location
Dave Dickinson & Associates Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides building services engineering consultancy including mechanical and electrical design, utility masterplanning, low‑carbon and energy consultancy, BIM coordination, BREEAM and sustainability…
Serves businesses and organisations in the building services and construction sectors, particularly clients commissioning building projects that require engineering, sustainability and…
Financial Health
WeakWeak · -9% CAGR over 2y
Location
ENERTECGREEN LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDevelops biomass gasification technology for small‑scale energy generation. Designs compact 1–5 MW gasifier units that convert biomass into fuel gas for heat and power production, intended for…
Serves B2B customers in renewable energy, including biomass fuel source operators, green energy project developers and industrial energy consumers needing 1–5 MW-scale solutions.
Financial Health
WeakWeak · -58% CAGR over 4y
Location
FORWARD HOLDINGS (UK) LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides utility consultancy services for businesses, including procurement and contract negotiation for electricity, gas and water supplies, supplier switching, utility bill validation, energy…
Serves B2B customers across sectors that buy electricity, gas, water and telecoms services, including organisations seeking utility cost control, account management, bill validation, EPCs and greener…
Financial Health
StableStable · 0% CAGR over 4y
Location
Keep Energy Systems
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDevelops long‑duration energy storage systems using compressed air and heat capture. Designs equipment that converts diesel engines into electrically driven compressors integrated with air and…
Sells to commercial and industrial customers needing resilient long-duration power, especially organisations operating in off-grid or weak-grid environments and businesses seeking local power system…
Financial Health
StrongStrong
Location
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How Leeds carbon and climate companies work and how to sell to them
What they do
Leeds carbon and climate firms usually make money from fee-based advisory and delivery work rather than from high-volume licence sales. Revenue comes from fixed-fee audits, greenhouse-gas inventories, energy and resource assessments, retained reporting support, and implementation programmes where the supplier helps a client turn recommendations into procured works or operating changes. Some use software or templates to speed evidence collection and reporting, but the commercial unit is often practitioner time, assurance of method and the credibility of the final pack. Pricing tends to start with a scoped diagnostic, then move into retainers, project management fees or recurring update cycles as clients need annual evidence.
Who they sell to
Typical buyers are finance directors, estates and facilities leads, operations managers, sustainability heads and procurement teams that need outputs they can defend internally. Smaller businesses may buy direct after a referral or local search; public-sector and infrastructure customers are more likely to use tenders, framework-style procurement or documented supplier checks. Initial projects are often modest and practical, with longer cycles when work touches capital expenditure, building services or supplier reporting. Sales conversations therefore tend to involve both cost and compliance: the sponsor wants lower energy use or better reporting, while finance and procurement want a clear scope, assumptions, liability position and delivery timetable.
What they buy
Most carbon and climate firms tend to spend on tools and services that reduce billable-time leakage and improve evidence handling. Useful categories include CRM, pipeline and bid management, project scheduling, time recording, document control, data collection, analytics and secure client portals. They may also buy accounting, legal, professional indemnity advice, tender-monitoring, marketing, recruitment, subcontractor management and technical training. Firms doing energy or resource-efficiency work can need field equipment, metering support and specialist contractors, while reporting-led practices need dependable workflows for client questionnaires, assumptions, version control and sign-off. The common thread is making bespoke advisory work look repeatable without weakening the audit trail.
Why and how to sell to them
Buying intent often appears when a firm has won more work than its delivery team can comfortably evidence, when a public-sector tender asks for tighter documentation, or when clients start asking for annual reporting rather than a single assessment. Other triggers include new service lines, senior hires in operations or finance, a move from referral selling to outbound, and partnerships around low-carbon project delivery. Outbound messages tend to land better when they speak to utilisation, audit trail, tender conversion and client confidence, rather than generic sustainability language. A credible pitch should show how it fits a scoped, evidence-heavy workflow with limited back-office capacity.
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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