Field Services Companies in London: 55,718 Active Firms (2026)
Field services companies in London deliver on-site installation, maintenance, repair and trade work for property, infrastructure and business customers.
Buying centres tend to sit with facilities managers, property operations teams, developers, social-housing and commercial landlords, and compliance managers responsible for building assets. The work is mostly B2B, with some residential-facing delivery through managing agents and development sites, and buying decisions often weigh response coverage, documentation discipline and supervisor capacity as much as trade price. Typical engagements range from repeat maintenance rounds, inspections and small repairs to project-based installation and remedial packages. Multi-crew operators with scheduling systems, job records and health-and-safety processes are better suited to borough-wide contracts than sole-trader call-out models.
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London has 55,718 actively trading field services companies, a sizeable cohort for a city where commercial property, dense housing stock, transport assets and retrofit work all create recurring on-site demand. The distribution is still skewed towards small operators: 287 firms have turnover above £5M, while 15,073 have been incorporated since 2022, suggesting continual formation at the entry end of the market. Reported headcount totals 5,188, so the employment footprint captured here sits within a relatively small subset of larger or more formalised employers rather than across every van-based trade business.
Building-work activity cuts across several rulebooks rather than a single field-services licence. Contractors on relevant building projects in England face client, designer and contractor duty-holder expectations under Building Safety Regulator guidance, especially where higher-risk buildings are involved. Competent person schemes matter for installers because they allow certain building work to be self-certified instead of taken through building control, provided technical competence requirements are met. Gas work is narrower and less discretionary: businesses and engineers must be on the Gas Safe Register to carry it out legally, with registration renewed annually. That regulatory spread favours operators able to evidence competence, supervision and job-level documentation.
Demand appears likely to remain split between reactive maintenance, compliance-led inspection work and project-linked installation, with buyers pressing for clearer scheduling, evidence capture and contractor accountability. Scale-up remains difficult because service quality depends on recruiting, supervising and retaining mobile tradespeople, not just selling more contracts. The cohort therefore tends to fragment into local specialists, borough-focused multi-crew firms and a thinner layer of regional operators. Consolidation may continue where buyers want fewer subcontractor interfaces, but regulated work should keep competence records and supervisor depth as selection criteria rather than price alone.
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
55,718
Active firms
2026
287
Over £5M
turnover
15,073
Since 2022
incorporations
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Key facts
About 1% of the trading cohort reports turnover above £5M (287 of 55,718 firms) — the rest sits below that revenue band.
27% of the cohort was incorporated since 2022 (15,073 firms), so a sizeable share is in its first few filing cycles.
Building Safety Regulator guidance covers client, designer and contractor duties under the Building Regulations etc. (Amendment) (England) Regulations 2023.
Competent person schemes allow building-trade installers to self-certify certain types of work instead of seeking building regulations approval, subject to minimum technical competence requirements.
Gas work must be carried out by businesses and engineers on the Gas Safe Register, with registration renewed every year.
ONS reports construction new orders rose 5.6% in 2024.
FIEC says EU construction investment fell by over 2% in 2024, with the residential segment expected to fall by 7.7% and civil engineering expected to grow by 5.8%.
Top London Field Services companies
Financial sub-scores
Computed from 5 filingsInstalls, maintains, repairs and modernises passenger lifts, platform lifts and escalators. Provides new lift installation, upgrades to existing systems, and ongoing maintenance and fault repair…
Serves private and public sector building owners, commercial and residential property managers, housing providers, facilities management firms and built heritage sites across London and surrounding…
Financial Health
HealthyHealthy · Profitable · 2% CAGR over 4y
Location
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Computed from 5 filingsProvides building services, facilities management, and refurbishment for commercial and residential properties, including mechanical and electrical system design, HVAC maintenance, fire safety…
Serves property owners, landlords, facilities managers and public-sector housing providers in London, including commercial buildings, residential blocks and social housing portfolios.
Financial Health
HealthyHealthy · Profitable, Hiring · 2% CAGR over 5y
Location
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Computed from 5 filingsProvides construction, property maintenance and refurbishment services for housing associations, local authorities and private sector clients. Services include responsive repairs, planned and void…
Serves housing associations, local authorities and private sector property clients, principally in the social housing sector across London and the South East.
Financial Health
StrongStrong · Profitable, Growing, Hiring · 10% CAGR over 4y
Location
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Computed from 5 filingsProvides facilities management services including hard, soft and fabric maintenance for commercial and public sector buildings. Delivers planned and reactive works such as electrical, HVAC, plumbing,…
Serves B2B clients and facilities providers managing single or multi-site buildings in hospitality, retail, healthcare, education, workplaces, industrial property and social housing across central…
Financial Health
StrongStrong · Growing, Hiring · 31% CAGR over 4y
Location
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Financial sub-scores
Computed from 3 filingsProvides installation, maintenance and repair of gas boilers, central heating systems and electrical services for residential and commercial properties. Offers maintenance packages, landlord safety…
Serves homeowners, private landlords, letting and property management agents, social housing providers and commercial organisations across London and the South.
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 2y
Location
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Computed from 5 filingsProvides facilities management and maintenance services for residential and commercial developments, including management of mechanical and electrical systems, public health services, and life safety…
Serves blue-chip property developers, estate owners and residential building managers responsible for large multi-unit developments, particularly residential schemes in London.
Financial Health
StableStable · -59% CAGR over 4y
Location
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Computed from 3 filingsProvides maintenance, repair and emergency call-out services for passenger, goods and platform lifts. Designs, manufactures and installs new lifts, and carries out lift modernisation, replacements…
Serves building owners, property managers, facilities teams and developers with passenger, goods or platform lifts, mainly across London, the South East and Southern England.
Financial Health
HealthyHealthy · Profitable · -24% CAGR over 2y
Location
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Computed from 5 filingsProvides mechanical and electrical facilities management services, including HVAC maintenance, electrical services, building fabric works, and project and capital works. Also delivers asset…
Serves B2B and public-sector estates teams, including commercial and private organisations, local authorities, education providers, healthcare providers and leisure operators needing compliant…
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 4y
Location
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Computed from 5 filingsProvides building services and facilities management including mechanical and electrical installation, maintenance and compliance testing. Installs and services heating, gas, fire safety and energy…
Serves B2B and public-sector property clients, including local authorities, housing providers, schools and facilities/property managers responsible for commercial and residential building assets.
Financial Health
HealthyHealthy
Location
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Computed from 3 filingsProvides building maintenance, repair and refurbishment services for residential and commercial properties, including mechanical, electrical and gas works. Installs and maintains heat metering…
Serves public sector and commercial property clients in London and the Southeast, including local authorities, social landlords, schools, commercial building operators and heat network providers.
Financial Health
WeakWeak · -2% CAGR over 2y
Location
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Computed from 5 filingsProvides property maintenance and facilities management services including heating and plumbing installation and repair, gas and oil systems, electrical testing and rewiring, drainage jetting and…
Serves local authorities, social housing providers, schools, places of worship, and residential property clients, covering both domestic and commercial premises.
Financial Health
HealthyHealthy · Growing · 1% CAGR over 4y
Location
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Computed from 5 filingsProvides mechanical building services maintenance and specialist works for commercial buildings, including HVAC and plant maintenance, building management system support, compliance assistance, and…
Serves B2B clients responsible for high-profile commercial buildings, including property owners, landlords, facilities managers and project teams in the commercial real estate sector.
Financial Health
StrongStrong · Hiring · 11% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial property maintenance services including planned preventative maintenance, emergency repairs, PAT testing, emergency lighting checks, roofing, flooring, drainage, plumbing,…
Serves businesses and commercial property owners or managers in London, Essex and the South East, including organisations with offices, retail or managed premises needing maintenance support.
Financial Health
HealthyHealthy · Hiring · 7% CAGR over 4y
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Computed from 3 filingsDesigns, installs and maintains fire protection systems including wired and wireless fire alarms, smoke control and automatic opening vents. Also provides fire risk assessments, emergency lighting,…
Serves B2B and public sector customers, plus residential property clients, needing fire safety systems and compliance support. Targets commercial buildings, public sector organisations and…
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 2y
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Computed from 3 filingsProvides passive fire protection services including fire door installation, maintenance and inspections, fire stopping and cavity barriers, compartmentation surveys, fire risk assessments, structural…
Serves UK property owners, developers, principal contractors and facilities/building managers responsible for fire safety compliance in commercial and residential buildings.
Financial Health
HealthyHealthy · Hiring · 532% CAGR over 2y
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Computed from 5 filingsProvides mechanical and electrical building services including design, installation, commissioning and maintenance of heating, air conditioning, ventilation and public health systems for commercial,…
Serves main contractors and private/public-sector clients in London and the South-East, across commercial offices, healthcare, education, leisure, government buildings, residential developments and…
Financial Health
HealthyHealthy · Profitable · -7% CAGR over 5y
Location
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Computed from 5 filingsProvides facilities management and building services including mechanical and electrical maintenance, planned preventative and reactive maintenance, office fit-outs and refurbishments (Cat A and Cat…
Serves B2B property customers, including asset managers, landlords, tenants, developers and small office occupiers with building maintenance, fit-out and compliance needs.
Financial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides planned, reactive and compliance maintenance for commercial properties, including electrical, gas and plumbing, air conditioning, fire systems and general building services, supporting…
Serves B2B clients including blue-chip companies, commercial property owners, landlords and property managers with office and commercial premises across the UK and Ireland.
Financial Health
StrongStrong · Growing, Hiring · 3% CAGR over 4y
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Computed from 5 filingsProvides commercial mechanical and electrical engineering services, including installation and maintenance of HVAC systems, boilers, chillers, pumps, lighting and LV power. Also carries out pipe…
Serves commercial property owners, facilities managers, NHS/public-sector estates, hotels, retail/office developments and blue-chip project teams across London and the South East.
Financial Health
HealthyHealthy · Hiring · 5% CAGR over 4y
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Computed from 5 filingsProvides maintenance, repair, modernisation and installation services for passenger and goods lifts. Works on OEM and non‑OEM systems, offers lift replacements and new installations, and supports…
Serves B2B and public-sector customers managing buildings or property portfolios, including commercial premises, residential blocks, retail environments, property management firms, housing…
Financial Health
StableStable · Hiring · 5% CAGR over 4y
Location
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Computed from 3 filingsProvides commercial and industrial mechanical and electrical engineering services, including plumbing, heating, ventilation and building services installations. Carries out preventative maintenance…
Serves property and facilities managers responsible for single or multi-site commercial, industrial and public-sector buildings, including schools, hospitals, historic properties and private…
Financial Health
HealthyHealthy · -4% CAGR over 2y
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Computed from 5 filingsProvides construction and building safety services including building services installation, planned maintenance works, fire safety systems, and environmental retrofit and decarbonisation projects…
Targets public-sector and commercial estate owners, housing associations, education providers, healthcare organisations and commercial property managers responsible for building compliance and…
Financial Health
StableStable · -8% CAGR over 4y
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Computed from 5 filingsProvides heating, plumbing, electrical, and air conditioning services for commercial properties, housing providers, landlords, and multi-site organisations. Offers boiler repairs, emergency heating…
Serves businesses, housing providers, local authorities, landlords and homeowners across London and surrounding areas, including multi-site operators, commercial property managers, schools, hotels,…
Financial Health
HealthyHealthy · -58% CAGR over 5y
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Computed from 5 filingsProvides electrical contracting and building services including electrical design and installation, compliance testing, maintenance, fire stopping, smoke alarm installation, lighting systems,…
Serves public sector bodies, housing providers, commercial property managers and domestic customers in London and the South East needing building, refurbishment and electrical works.
Financial Health
StrongStrong · Growing, Hiring · 84% CAGR over 5y
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Computed from 5 filingsProvides property refurbishment, retrofit and maintenance services for residential housing and community buildings. Services include planned maintenance, sustainability upgrades, conversion of vacant…
Serves public- and private-sector organisations managing housing and community spaces across London and the South East, including landlords, housing providers and stakeholders responsible for…
Financial Health
StrongStrong · Growing, Hiring · 9% CAGR over 4y
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Computed from 5 filingsProvides electrical and mechanical contracting services including design, installation, testing and maintenance. Works on new infrastructure, refurbishments and upgrades for commercial buildings…
Serves businesses and public sector organisations in commercial, retail, education, hospitality, finance, transport and healthcare sectors, mainly across Greater London and the South East.
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StrongStrong · Growing, Hiring · 8% CAGR over 4y
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Computed from 5 filingsProvides mechanical and electrical engineering services including system design, installation, planned and corrective maintenance, and off‑site fabrication. Works on commercial, industrial, rail and…
Serves B2B clients in commercial, industrial, rail and data centre sectors, including project teams, UK agencies and other mechanical and electrical contractors in London and surrounding areas.
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 4y
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Computed from 5 filingsProvides building construction, refurbishment and maintenance services, including void property refurbishment, structural and timber repairs, passive fire protection, and planned or responsive…
Serves public sector and nonprofit property owners in London, including local authorities, NHS trusts, schools, housing associations and charities, plus private homeowners, landlords and property…
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 4y
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Computed from 3 filingsProvides electrical contracting services including maintenance and repair, electrical testing and inspections, portable appliance testing, emergency lighting and fire alarm testing, street and estate…
Sells primarily to property management companies and estate managers in London and Greater London, serving managed residential estates and buildings. Also serves customers needing electrical…
Financial Health
WeakWeak · 0% CAGR over 2y
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Computed from 5 filingsProvides electrical contracting services including installation, maintenance and compliance testing for domestic and commercial properties. Services cover fire alarm and emergency lighting systems,…
Serves housing associations, local authorities, public-sector estate teams and commercial property owners in London and the South East.
Financial Health
HealthyHealthy · 2% CAGR over 4y
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Computed from 5 filingsProvides building maintenance and construction services, including refurbishment and fit-outs, design and build projects, mechanical and electrical installation, and facilities management for…
Serves business and public-sector organisations in commercial, industrial, education, hospitality, leisure and retail sectors, including property owners, operators and facilities teams.
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StrongStrong
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Computed from 5 filingsDesigns, installs and maintains fire safety systems including fire alarms and detection, smoke ventilation (AOV), sprinkler systems, wet and dry risers, emergency lighting and fire extinguishers, and…
Serves businesses, property owners and public-sector organisations in London and the South East, including retail, banking, government, defence, commercial and industrial sectors.
Financial Health
StrongStrong · Hiring · 4% CAGR over 4y
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Computed from 5 filingsProvides commercial plumbing, heating and drainage services including planned preventative maintenance, reactive drain repairs and unblocking. Also delivers building maintenance and repair works such…
Serves commercial customers needing drainage, plumbing, heating and building maintenance, including multi-site operators such as restaurants and franchise businesses. Targets facilities, maintenance…
Financial Health
StableStable · -67% CAGR over 4y
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Computed from 5 filingsProvides mechanical pipework services for building projects, including fabrication, installation and maintenance of heating, chilled water, oil, gas and steam pipe systems, plus commercial plumbing…
Sells to building industry clients, including contractors and property developers delivering office blocks, factories, apartment blocks, council estates and education projects, mainly across London…
Financial Health
HealthyHealthy · 0% CAGR over 4y
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Computed from 3 filingsProvides mechanical, electrical and public health (MEP) building services for construction projects, including design and BIM modelling, design for manufacture and assembly (DfMA), installation,…
Serves B2B clients in construction and property, including developers and main contractors delivering offices, workspaces, transport infrastructure, education facilities, retail/leisure sites and…
Financial Health
HealthyHealthy · Profitable, Hiring · 7% CAGR over 2y
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Computed from 3 filingsProvides mechanical installation and maintenance services for commercial and residential buildings, including heating, plumbing, air conditioning and ventilation systems. Also offers in‑house system…
Serves commercial and residential clients in London, including businesses, landlords, property managers and homeowners with heating, plumbing, air conditioning and ventilation requirements.
Financial Health
HealthyHealthy · Hiring · 11% CAGR over 2y
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Computed from 4 filingsProvides facilities management engineering services including planned and reactive maintenance of mechanical and electrical building systems, plant installation and replacement, electrical compliance…
Serves facilities managers, property owners and framework clients across the UK in commercial, retail, leisure and residential property sectors, including organisations needing national or regional…
Financial Health
StrongStrong · Profitable, Growing, Hiring · 5% CAGR over 3y
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Computed from 5 filingsProvides facilities management services including planned and reactive maintenance for building systems such as HVAC, electrical and plumbing. Conducts statutory compliance inspections, risk…
Targets B2B facilities, estates and property managers responsible for commercial buildings, offices and critical building systems, including buyers needing planned maintenance, compliance support and…
Financial Health
StrongStrong · Hiring · 7% CAGR over 4y
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Computed from 5 filingsProvides design, installation, maintenance and repair of HVAC and air conditioning systems, ventilation, commercial plumbing and process pipework. Also installs UV air purification and other…
Serves public and private sector clients, including design-and-build contractors, main contractors, landlords, tenants and end users in commercial offices, education, healthcare, care homes,…
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 4y
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Computed from 4 filingsProvides commercial building refurbishment, fit-out and property maintenance services, including mechanical and electrical installations and maintenance, inspection and testing, painting and…
Serves commercial property owners and clients in the commercial, residential and industrial markets across Central London and South East England, from small jobs to larger building projects.
Financial Health
HealthyHealthy · 3% CAGR over 3y
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Computed from 5 filingsProvides electrical engineering and contracting services including design, installation, commissioning and maintenance of electrical systems for large-scale commercial projects, along with facilities…
Serves B2B and public-sector clients, including facilities managers, commercial property owners, shopping centres, housing providers and main contractors on large-scale premises projects.
Financial Health
StrongStrong
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Computed from 3 filingsProvides maintenance, repair and refurbishment services for social housing properties. Works include void refurbishments, electrical and plumbing installations, fire risk assessment works, door and…
Serves B2B and public-sector customers in social housing, including local authorities, housing associations and property managers responsible for residential housing stock across London, Essex and…
Financial Health
StableStable · Hiring · 6% CAGR over 2y
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Computed from 5 filingsProvides building, roofing, and property maintenance services for social housing providers and private clients. Activities include roof installation and repair, void property refurbishment,…
Serves public sector housing providers, local authorities and social housing residents, alongside private homeowners and clients, with a focus on London and the South East.
Financial Health
HealthyHealthy · Hiring · 10% CAGR over 4y
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Computed from 3 filingsProvides property maintenance, repair, and refurbishment services for residential and commercial buildings, including void refurbishments, kitchen and bathroom installations, roofing, drainage,…
Serves registered social landlords, private residential property owners, schools and commercial property clients in London and the surrounding home counties.
Financial Health
StrongStrong · Growing, Hiring · 15% CAGR over 2y
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Computed from 4 filingsProvides mechanical building services for construction projects, including system design, CAD drawings, installation, testing and commissioning. Works on residential, commercial, education and…
Serves building contractors in London and the South East delivering residential, affordable housing, commercial, education and infrastructure projects, including refurbishments and new builds.
Financial Health
StrongStrong · Hiring · 11% CAGR over 3y
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Computed from 3 filingsProvides specialist construction services including diamond drilling, concrete scanning, structural builderswork, strip‑out and demolition preparation, and passive fire protection installation for…
Serves construction industry clients, especially contractors and project teams on commercial and high-profile building projects across London, the South East and East Anglia.
Financial Health
StrongStrong · Profitable · -6% CAGR over 2y
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Computed from 3 filingsProvides building construction, refurbishment and property maintenance services for residential and institutional properties. Delivers repairs, kitchen and bathroom installations, plastering,…
Serves public and private sector property owners and managers in London, including housing associations, local authority housing partners, universities and residential developers.
Financial Health
HealthyHealthy · -11% CAGR over 2y
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Computed from 5 filingsProvides mechanical, electrical and plumbing (MEP) contracting for construction projects, including HVAC installation, power distribution, lighting, data cabling, fire detection and alarm systems,…
Serves B2B construction clients, including developers and main contractors delivering commercial offices, residential high-rises and mixed-use developments across London and the South East.
Financial Health
StrongStrong · Growing, Hiring · 46% CAGR over 4y
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Computed from 4 filingsProvides construction and property maintenance services including new build works, plumbing and drainage, gas and electrical installations, groundworks, fireproofing, and heated steam cleaning using…
Serves London local authorities, public sector organisations, main contractors and commercial property clients procuring construction and property services.
Financial Health
StableStable
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Computed from 3 filingsProvides facilities management and building maintenance services including water hygiene and Legionella control, mechanical and electrical engineering, HVAC and air conditioning maintenance, boiler…
Serves UK businesses managing commercial and residential property portfolios, including property managers, facilities directors, operations managers and health and safety teams responsible for…
Financial Health
HealthyHealthy · -15% CAGR over 2y
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How London Field Services companies work and how to sell to them
What they do
Field-services operators earn through planned maintenance retainers, compliance inspection schedules, call-out charges, day-rate labour, and fixed-price installation or remedial projects. Their offer is a mix of mobile trade labour, supervision, materials procurement, equipment access and evidence packs rather than a pure labour resale. Pricing usually follows trade rates, visit fees, schedule-of-rates work, quoted project packages or framework rates agreed with a landlord, contractor or facilities manager. Margin depends on utilisation, first-time fix rates, travel time, materials mark-up and the cost of keeping qualified workers available for urgent jobs.
Who they sell to
Most sell to commercial landlords, managing agents, residential block operators, developers, facilities-management teams, social-housing providers and infrastructure or public-estate owners. Day-to-day buyers are typically facilities managers, property managers, contract managers, heads of maintenance, compliance managers, procurement teams and site-based project leads. Smaller jobs can be booked directly after a quote; larger maintenance or compliance packages tend to move through approved-contractor lists, framework tenders, RFPs or partner-led subcontracting. Sales cycles are usually short for urgent repair work, longer where insurance, accreditations, method statements, references and mobilisation planning need to be reviewed.
What they buy
Most field-services firms tend to spend on scheduling and dispatch tools, mobile job management, asset registers, certificate storage, route planning, quoting, invoicing and job-costing software. Compliance-led operators also buy health-and-safety support, training, accreditation advice, insurance broking, legal services and accounting help for payroll, subcontractor payments and VAT. Recruitment is a recurring cost because qualified trades and supervisors are hard to replace. Larger operators may also need fleet management, fuel cards, warehouse or yard space, call-handling services, customer portals, cyber security and reporting tools that make service-level performance visible to property clients.
Why and how to sell to them
Field-services buyers tend to evaluate new suppliers when job volumes outgrow spreadsheets, a larger contract adds reporting obligations, supervisors are stretched, or regulated work creates more certificate and audit requirements. Other triggers include a new operations director, a move into multi-borough coverage, insurance renewal, recurring missed appointments, rising materials costs or a client asking for tighter evidence capture. Outbound works better when it speaks to margin leakage, rework, compliance risk and response-time penalties rather than generic productivity. Useful proof points are usually operational: fewer aborted visits, cleaner handover packs, faster invoicing and clearer visibility of which crews are profitable.
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
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