Commercial Cleaning Companies in London: 5,560 Active Firms (2026)
Commercial cleaning companies provide contracted cleaning, hygiene and facilities support for workplaces, venues and multi-site premises across London.
Buying decisions tend to sit with property, facilities, workplace and operations teams rather than IT or finance. Demand is mostly business-to-business, spanning office occupiers, landlords, venues, managed premises and multi-site operators that need predictable service levels across different locations. Engagements are typically recurring, labour-led contracts, with pricing shaped by site footprint, visit frequency, shift patterns, security access and add-on hygiene or deep-cleaning work. Smaller premises often buy a standard routine service, while mid-market and enterprise customers tend to require supervisors, reporting, mobilisation planning and cover for absences.
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London has 5,560 actively trading commercial cleaning firms, a sizeable local contractor base serving central office districts, venues, outer-borough commercial estates and multi-site premises. Reported headcount totals 10,738 staff, underscoring the labour-heavy shape of the market and the operational importance of recruitment, supervision, rota cover and site-level quality control. The local picture is therefore not just a supplier-count story: capacity depends on field management, shift coverage and the ability to mobilise teams across premises with different access rules.
Procurement and compliance often carry more weight than formal sector licensing. Client contracts are shaped by employment status, minimum-wage practice, right-to-work checks, site risk assessment, insurance cover and security rules for out-of-hours access. For offices, venues and managed estates, buyers commonly ask for evidence around training, supervision, incident reporting, chemicals handling and waste processes before awarding recurring work. Market structure is similarly practical: labour availability, travel time between sites and unsocial-hours supervision define capacity more than plant or proprietary methods. Incumbents can still be hard to displace once routines, keys, passes and quality expectations are embedded.
Demand appears tied to office utilisation, venue footfall and outsourcing choices by property managers rather than to a single technology cycle. The cohort tends to have a long tail of owner-managed contractors, with only a small minority reaching the staffing depth needed for larger estates. Cost pressure has been persistent because labour, travel and supervision sit close to the centre of the operating model. Consolidation may therefore come less from speculative expansion than from contract transfer, subcontracting relationships and buyers preferring suppliers that can document service quality across sites.
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
5,560
Active firms
2026
48
Above £5M turnover
Larger reported operators
2,159
Incorporated since 2022
Recent company formation
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Key facts
About 1% of the trading cohort reports turnover above £5M (48 of 5,560 firms) — the rest sits below that revenue band.
38% of the cohort was incorporated since 2022 (2,159 firms), so a sizeable share is in its first few filing cycles.
London commercial cleaning demand is tied to office occupancy, retail and hospitality footfall, public-building use and managed-estate procurement cycles.
Labour availability remains a practical constraint because many contracts require site-based staff at fixed service windows.
The market includes labour-intensive contractors alongside operators that coordinate specialist cleaning and multi-site facilities support.
Workplace, venue and estate contracts tend to be recurring operational spend rather than one-off household cleaning work.
Top London Commercial Cleaning companies
Financial sub-scores
Computed from 5 filingsProvides contract commercial cleaning and facilities support services for offices and multi-tenant properties. Services include daily cleaning, deep cleans, washroom supplies, waste and recycling…
Serves B2B clients including SMEs, multinationals, property managers, FM teams, landlords and blue-chip organisations managing offices, estates, residential and mixed-use portfolios across London,…
Financial Health
WeakWeak · -67% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning and facilities support services including office cleaning, commercial window and carpet cleaning, washroom services, consumable supply, waste management, rope access…
Serves London-based businesses, office occupiers and facilities/property managers needing outsourced cleaning and support services for commercial premises.
Financial Health
WeakWeak · -68% CAGR over 4y
Location
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Computed from 3 filingsProvides commercial cleaning and facilities management services for offices and other premises, including contract cleaning, window and high‑level cleaning, carpet and floor maintenance, kitchen deep…
Serves blue-chip companies, SMEs, property agents and public sector organisations across London and the south-east, including legal, financial, IT, retail, marketing, education, government, leisure,…
Financial Health
WeakWeak · -4% CAGR over 2y
Location
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Computed from 5 filingsProvides commercial cleaning services for offices and workplaces, including daily cleaning, deep cleaning, carpet and window cleaning, waste management, washroom services, grounds maintenance, and…
Serves businesses and public-sector organisations in London and surrounding areas, including offices, healthcare providers, schools, universities, hospitality venues, professional practices, gyms,…
Financial Health
StrongStrong · -2% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning and facilities support services, including daily and window cleaning, clinical and Covid sanitation, washroom hygiene, estate cleaning, maintenance, landscaping, waste…
Serves commercial landlords, estate managers, office occupiers and facilities teams across London and the South East, primarily B2B organisations managing workplaces and estates.
Financial Health
HealthyHealthy · -6% CAGR over 5y
Location
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Computed from 5 filingsProvides commercial cleaning and facilities support services for businesses and public sector premises, including office cleaning, carpet and window cleaning, deep and builders cleaning, washroom…
Serves London-based businesses, property managers and public sector organisations, from growing SMEs to large corporate and multi-site portfolios, including offices, estates, education, healthcare,…
Financial Health
DistressedDistressed · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning and facilities management services for workplaces and institutions. Delivers contract cleaning, hygiene and maintenance support through managed teams for offices,…
Serves B2B and public-sector organisations, mainly in London with a growing UK client base, including schools, healthcare and hospice providers, charities/social care organisations, and facilities…
Financial Health
StableStable · Hiring · 15% CAGR over 4y
Location
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Computed from 5 filingsProvides contract cleaning services for commercial offices, including general office cleaning, window cleaning, washroom services, waste and recycling management, secure shredding, carpet cleaning,…
Serves businesses and property managers responsible for London offices and commercial premises, including clients seeking ongoing contract cleaning and related facilities support.
Financial Health
HealthyHealthy · -66% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning and facilities services for offices, schools, distribution centres and communal areas. Offers daily cleaning, kitchen deep cleaning, window and carpet cleaning, grounds…
Serves B2B and education customers across London, including offices, schools, distribution centres, communal property managers, restaurants and high street businesses needing daily or specialist site…
Financial Health
HealthyHealthy · Hiring · 5% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning and facilities management services for offices, gyms, healthcare settings, schools, hospitality venues and public buildings. Services include daily contract cleaning,…
Serves private and public sector organisations across London and the South East, including offices, care homes, embassies, gyms, leisure venues, restaurants, schools, sports venues, NHS facilities,…
Financial Health
StrongStrong · 4913% CAGR over 1y
Location
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Computed from 5 filingsProvides commercial cleaning and facilities management services for offices and commercial premises, including regular and deep cleaning, window cleaning, waste management, pest control, planned…
Serves B2B customers including property managers, commercial landlords and owner-occupiers responsible for offices, commercial premises and professional workplaces across Greater London within the…
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial facilities and cleaning services for businesses, including daily office cleaning, specialist and window cleaning, waste and recycling management, and support services, using…
Serves B2B clients and facilities/property managers responsible for commercial premises, including offices, retail units, reception areas, multi-storey buildings and other commercial sites, with…
Financial Health
HealthyHealthy · -62% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning services for offices, communal areas, retail, restaurants, warehouses and education sites. Also offers window and carpet cleaning, after-builders cleaning, pest control,…
Serves businesses and property managers needing cleaning and facilities support, including offices, apartment complexes, retail sites, leisure venues, restaurants, warehouses, data centres and…
Financial Health
StableStable · Hiring · 50% CAGR over 4y
Location
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Computed from 3 filingsProvides contract cleaning services for residential blocks, housing associations, offices and public sector facilities. Services include daily cleaning, washroom services, reactive cleaning, and…
Serves housing associations, residential block and estate managers, office and commercial property managers, and public sector facilities across London and the Southeast.
Financial Health
WeakWeak · 2% CAGR over 2y
Location
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Computed from 5 filingsProvides contract cleaning and facilities support services for schools, offices, residential communal areas, retail and light industrial sites, and medical centres. Services include routine cleaning,…
Sells B2B contract cleaning and facilities services to schools, offices, residential property management companies, medical centres, and industrial, manufacturing, production, distribution and retail…
Financial Health
StrongStrong · 14% CAGR over 3y
Location
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Computed from 5 filingsProvides commercial cleaning services for offices and business premises, including daily office cleaning, washroom hygiene, carpet and upholstery cleaning, window cleaning, floor care, deep cleaning,…
Serves businesses and institutions across London, Essex and the South East, including offices, corporate workspaces, retail and hospitality sites, warehouses, factories, schools, colleges, healthcare…
Financial Health
HealthyHealthy · -16% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning services for offices and facilities including schools, universities, medical sites, gyms and hospitality venues. Also supplies window, carpet and floor cleaning, waste…
Serves businesses and institutions in London and Kent, including offices of all sizes, universities, schools, nurseries, student accommodation providers, clinics and hospitals, gyms, hotels, pubs,…
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning and facilities services including office, retail, hospitality, education and leisure venue cleaning. Offers deep cleaning such as carpet, hard floor, kitchen and steam…
Sells to businesses and facility decision-makers needing commercial cleaning, including offices, retailers, estate agents, property managers, hotels, schools, leisure venues, restaurants, pubs, bars,…
Financial Health
StrongStrong · Growing, Hiring · 5% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning services for offices and facilities, including carpet cleaning, waste removal, janitorial supplies, building maintenance, decorating, and support staff such as…
Serves businesses and organisations in the City of London needing commercial cleaning, office support, waste removal, maintenance and related workplace services.
Financial Health
WeakWeak · -8% CAGR over 4y
Location
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Computed from 3 filingsProvides contract cleaning and facilities management services for commercial offices and sector clients including food and catering sites, education facilities and aviation environments, along with…
Serves businesses and institutions in London and the Home Counties, including food and catering operators, education providers, commercial offices, aviation facilities, and organisations needing…
Financial Health
StableStable · Hiring · 8% CAGR over 2y
Location
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Computed from 4 filingsProvides commercial cleaning and facilities management services for businesses, including office cleaning, carpet and window cleaning, after-builders cleaning, floor treatments, event cleaning,…
Sells to businesses and organisations needing commercial cleaning and facilities management, including offices, healthcare providers, hotels, leisure venues, retailers, schools, churches, social…
Financial Health
HealthyHealthy · 1% CAGR over 3y
Location
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Computed from 2 filingsProvides commercial cleaning services for offices, retail premises, schools, and communal buildings. Services include daily office cleaning, retail and boutique cleaning, window and carpet cleaning,…
Serves London-based businesses and organisations, including offices, retail and luxury boutiques, schools, property managers, communal blocks and other high-footfall commercial sites.
Financial Health
StableStable · 0% CAGR over 1y
Location
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Computed from 3 filingsProvides commercial cleaning and facilities support services for offices, educational institutions and other workplaces, including deep cleans, carpet and upholstery cleaning, window cleaning,…
Serves businesses, office operators, education providers, medical facilities and property managers needing cleaning support across London and the South East, from small offices to entire office…
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 2y
Location
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Provides commercial cleaning and facilities management services, including routine workplace cleaning, hygiene maintenance and building support services. Operates contract cleaning teams serving…
Serves businesses, schools, healthcare and care organisations, charities and other institutions, mainly in London with a growing UK client base, targeting facilities managers and operations teams…
Financial Health
N/AN/A
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Computed from 5 filingsProvides commercial cleaning and facilities management services for offices, retail sites, estates and industrial premises. Services include waste and recycling management, pest control, window…
Serves businesses and property stakeholders in London, including corporate offices, retail environments, luxury developments, developers, facilities managers, estates, industrial sites and student…
Financial Health
HealthyHealthy · Hiring · 3% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning services for businesses, including office and daily cleaning, window and carpet cleaning, washroom services, consumable supply, waste management, and specialist cleaning…
Serves B2B organisations across London and the UK, including corporate offices, retail and leisure sites, education providers, industrial and manufacturing firms, logistics operations, and property…
Financial Health
HealthyHealthy · Profitable · -4% CAGR over 5y
Location
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Computed from 5 filingsProvides contract cleaning and facilities support services for education sites, offices, residential communal areas, retail and light industrial premises, and medical centres. Services include…
Serves schools, offices, residential property management companies, industrial and retail businesses, manufacturers, distributors and medical centres across London and the South of England.
Financial Health
HealthyHealthy · -1% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning and hygiene services for workplaces, including office cleaning, sanitisation, deep cleaning and infection control. Also delivers soft facilities management services…
Serves B2B clients in London and the Home Counties, including blue-chip corporates, pharmaceutical head offices and organisations seeking workplace cleaning, hygiene and soft facilities management…
Financial Health
StableStable · -62% CAGR over 4y
Location
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Computed from 3 filingsProvides commercial cleaning and facilities management services for offices and commercial properties, including washroom hygiene, window and high‑rise window cleaning, graffiti removal, pressure…
Serves owners, occupiers and managers of commercial buildings, offices and private properties in London and surrounding areas, including businesses needing ongoing facilities support and property…
Financial Health
HealthyHealthy · Hiring · 22% CAGR over 2y
Location
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Computed from 5 filingsProvides commercial cleaning and support services including office, school and medical facility cleaning. Offers window cleaning, carpet cleaning, jet washing, hard floor maintenance, sanitary unit…
Sells to businesses and property managers in London needing commercial cleaning and support services, including offices, schools and nurseries, medical facilities, and residential or communal block…
Financial Health
StrongStrong · Hiring · 14% CAGR over 6y
Location
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Computed from 5 filingsProvides commercial cleaning services including office cleaning, window cleaning using water-fed pole systems, washroom hygiene services, and additional facilities services such as gutter cleaning,…
Sells to businesses needing cleaning and facilities support, especially offices from small teams to larger workplaces. Serves commercial clients in London and surrounding counties requiring office,…
Financial Health
WeakWeak · Hiring · 14% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning services for businesses, including office cleaning, window cleaning and specialist cleaning. Also offers related support services such as key holding, pest control and…
Serves London-based businesses and institutions, including offices of all sizes, galleries, historic buildings, embassies, law firms, consulates, military institutions, banks and hedge funds.
Financial Health
HealthyHealthy · -7% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning services for businesses, including office cleaning, deep cleaning, carpet and window cleaning, jet washing, graffiti removal, waste management and specialist cleaning for…
Serves London-based businesses and organisations, including business owners, facilities managers and operations teams at small offices, large commercial spaces, retail, hospitality, schools,…
Financial Health
StableStable · -5% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning services for workplaces and facilities, including office cleaning, window cleaning, deep cleaning, industrial and construction site cleaning, carpet and kitchen cleaning,…
Serves London-based businesses needing workplace cleaning, including offices, industrial premises, construction sites, commercial kitchens and facilities teams, with emphasis on clients in the West…
Financial Health
StableStable · 0% CAGR over 4y
Location
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Computed from 3 filingsProvides commercial cleaning and property maintenance services including office cleaning, commercial window cleaning, carpet and upholstery cleaning, floor polishing, jet washing, pest control, waste…
Serves commercial clients in London and the South East, including offices, schools, restaurants, bars, nightclubs, pubs, property managers, landlords and facilities teams responsible for communal and…
Financial Health
WeakWeak · Hiring · 7% CAGR over 2y
Location
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Computed from 5 filingsProvides commercial cleaning services for offices and business premises, including kitchens, gyms, cinemas, theatres, showrooms and retail spaces, along with waste management, delivered by in‑house…
Sells to businesses needing commercial cleaning, especially offices, retail sites, restaurants and kitchens, gyms, cinemas, theatres and showrooms, with a focus on companies across London.
Financial Health
StableStable · -3% CAGR over 4y
Location
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Computed from 3 filingsProvides commercial cleaning services including daily office cleaning, carpet cleaning, and window cleaning for businesses. Delivers contract cleaning and support services tailored to organisations…
Serves businesses and public-sector organisations in London and the Southeast, from small firms to blue-chip corporations, including accountants, solicitors, media, fashion, publishers, tour…
Financial Health
HealthyHealthy · 1% CAGR over 2y
Location
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Computed from 2 filingsProvides commercial and office cleaning services, including regular office cleaning, deep cleans, washroom services and sanitary bin supply, waste collection, carpet and upholstery cleaning, pressure…
Serves businesses of all sizes in London, particularly office-based organisations and workplace managers seeking commercial cleaning for workspaces, washrooms, kitchens, events, and post-build…
Financial Health
WeakWeak · Hiring · 80% CAGR over 1y
Location
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Computed from 3 filingsProvides facilities management and cleaning services, including daily office cleaning and industrial cleaning. Works across residential, commercial, retail and hospitality properties, managing…
Serves organisations and property managers in London and surrounding areas, including offices, residential sites, commercial premises, retailers and hospitality venues.
Financial Health
StrongStrong · Hiring · 699% CAGR over 2y
Location
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Computed from 5 filingsProvides commercial cleaning services for businesses, including office cleaning, builders’ cleans, communal block cleaning, carpet and upholstery cleaning, window cleaning, and hard floor cleaning…
Serves businesses and property managers in London, including offices, restaurants, hotels, gyms, building sites, estate managers and communal blocks needing commercial cleaning contracts.
Financial Health
StableStable · -6% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning services for workplaces and public facilities, including offices, retail premises, healthcare settings and educational institutions. Delivers routine and deep cleaning,…
Serves London-based businesses and organisations with commercial premises, including offices, retailers, healthcare providers, schools, colleges and nurseries needing regular or out-of-hours cleaning…
Financial Health
StrongStrong · Hiring · 9% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning services including office cleaning, window cleaning, carpet and upholstery cleaning, hard floor maintenance, and builders’ cleans. Also delivers kitchen and toilet…
Serves commercial customers across Greater London, particularly offices and businesses, as well as builders and property managers responsible for workplaces, communal areas, car parks and other…
Financial Health
StableStable · Hiring · 16% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial cleaning services including general premises cleaning, industrial cleaning, carpet cleaning, and window cleaning. Works with businesses to maintain offices and other facilities…
Serves businesses and site managers needing cleaning contractors, including hospitality and multi-site commercial clients, across areas of London such as Camden, Hackney, Soho, Kensington, Vauxhall…
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
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Provides commercial cleaning services for offices, residential blocks and communal areas. Services include regular and deep cleaning, carpet and upholstery cleaning, hard floor cleaning and buffing,…
Serves property managers, facilities teams and businesses across London managing offices, mixed-use residential estates, commercial blocks and communal spaces, including property management firms and…
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Computed from 5 filingsProvides commercial cleaning services for offices and business premises, including daily office cleaning, common area maintenance, carpet and upholstery cleaning, window cleaning, washroom hygiene…
Serves London-based businesses and organisations, from SMEs to large multinationals and blue-chip PLCs, plus some residential customers and office end-of-tenancy clients.
Financial Health
StrongStrong · Growing, Hiring · 28% CAGR over 4y
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Computed from 5 filingsProvides commercial cleaning and facilities support services, including regular and deep cleaning, carpet and window cleaning, communal area maintenance, end‑of‑tenancy cleaning, and event room…
Serves B2B clients including property and block management firms, conference and banqueting venues, corporate event organisers, landlords, letting agents and organisations needing outsourced site…
Financial Health
StrongStrong · Hiring · 67% CAGR over 4y
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Computed from 5 filingsProvides commercial and industrial cleaning services for organisations including offices, schools, financial institutions, government buildings and residential facilities, offering customised…
Serves commercial and public-sector clients in London and the Home Counties, including offices, schools, police stations, financial institutions, government buildings, property management companies…
Financial Health
WeakWeak · -69% CAGR over 4y
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Computed from 5 filingsProvides commercial cleaning services for businesses, including office, warehouse, retail, school and hotel cleaning. Offers contract and one-off cleaning, window cleaning, disinfection, graffiti…
Serves businesses and public sector organisations across London, including offices, warehouses, retailers, schools, hotels, construction sites, healthcare/science facilities, transport operators,…
Financial Health
StableStable · -23% CAGR over 4y
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How London Commercial Cleaning companies work and how to sell to them
What they do
Commercial cleaning providers earn revenue by turning site labour, supervision and consumables into repeatable service contracts. The core unit is usually a premises schedule: daily or weekly visits, agreed tasks, named areas, access rules and service checks. Revenue also comes from one-off deep cleans, hygiene work, waste handling and emergency cover, often priced separately from the routine contract. Gross margin depends less on proprietary equipment than on rota design, staff retention, travel time and avoiding missed shifts. Larger operators tend to package cleaning with broader facilities support, while smaller contractors usually compete on responsiveness, local coverage and willingness to take awkward hours.
Who they sell to
Most customers are property managers, facilities teams, office managers, venue operators and operations directors who need cleaning to happen without becoming a daily management burden. Smaller sites may buy through a direct owner-manager relationship after a walkthrough and quote. Larger estates typically use formal tenders, approved supplier lists, framework agreements or property-management procurement channels, with site mobilisation, insurance, training and reporting checked before award. Contract length tends to reflect tenancy cycles, building management arrangements and service charge budgets. Decision makers may not be senior executives, but they carry operational risk if hygiene, access or staff conduct fails.
What they buy
Most commercial cleaning firms tend to spend on workforce scheduling, time and attendance, mobile task management, payroll, HR, recruitment, lone-worker safety, fleet or travel coordination, and customer reporting. Finance and operations systems matter where contractors run many sites with different shift patterns, because missed visits and late invoicing erode margin. They also buy uniforms, chemicals, equipment, insurance, training, vetting support, legal advice and outsourced accounting. For larger providers, tender-writing support, bid compliance, quality auditing and management information can be credible categories. Sellers should expect practical buying criteria: cost per site, supervisor adoption, proof of attendance and less admin for managers.
Why and how to sell to them
Cleaning buyers tend to evaluate suppliers when contract volume rises, supervisors become stretched, a new facilities manager joins, payroll or absence issues become visible, or a tender pipeline demands better evidence of compliance. London operators are often sensitive to wage costs, staff churn, site access constraints and out-of-hours service failures, so pitches that link directly to margin leakage or contract retention usually land better than broad productivity claims. Useful outbound triggers include new premises, multi-site wins, recruitment bursts, service diversification and public tender activity. Plain evidence matters: fewer missed shifts, faster mobilisation, cleaner audit trails and less manual chasing for area managers.
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.
Also in London
Related directories
Frequently asked questions
How many commercial cleaning companies are there in London?
What counts as a commercial cleaning company in this list?
Which are the largest commercial cleaning companies in London?
What do commercial cleaning companies in London actually do?
How does London commercial cleaning compare internationally?
How is this list built and how fresh is the data?
How big are the typical commercial cleaning companies in London?
Are these mostly new or established commercial cleaning companies?
What SIC codes does this use?
What buying signals should I look for?
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