There is a conversation that happens in almost every property management team in London, usually after something has gone wrong. A client-facing area was not cleaned before a board meeting. A building inspector raised a concern about standards in the communal areas. A key occupier complained formally about the state of the washrooms on their floor. And someone, somewhere, asks: how did we end up with this cleaning contractor?

The answer, almost always, is that the procurement decision was made on price. The specification was written to minimise cost rather than define outcome. The contract was renewed without meaningful review. And the standards, the real, visible, day-to-day standards that occupiers experience and that define how your building is perceived, were never actually specified at all.

London’s highest-performing buildings do not make this mistake. The property managers who oversee The Leadenhall Building, Regent’s Place, Broadgate, and the capital’s other landmark commercial and mixed-use estates approach cleaning procurement with the same rigour they apply to any other critical operational decision. They know what they are buying, why it matters, and how to tell the difference between a contractor who will deliver and one who simply bid lowest.

This guide sets out everything a property manager needs to know, from the questions to ask before signing, to the warning signs to watch for in the tender process, to what a genuinely high-performing cleaning contract looks like in practice.

The cleaning contract is not a commodity purchase. For a landmark London building, it is one of the most consequential operational decisions you will make because it affects every person who walks through the door, every day.

Why the cleaning decision matters more than most property managers realise

Cleaning is typically the largest in-building workforce on any commercial estate. In a multi-tenanted tower or a large mixed-use campus, the cleaning team may have hundreds of staff across multiple shifts, more people than any single occupier. They have unrestricted access to every floor, every suite, every sensitive area of the building. They are present during the hours when most other contractors are not. And they are, whether your building acknowledges it or not, ambassadors for the environment you are managing.

Occupiers notice the quality of cleaning in ways they often cannot articulate. A lobby that is consistently immaculate creates a feeling of safety, quality, and care. A corridor that smells of chemicals, or a washroom that is poorly maintained between visits, erodes confidence in the building management and, increasingly, in the landlord’s ability to deliver on their covenant. In a market where occupiers have more options and higher expectations than ever before, the standard of cleaning is not peripheral to the occupier experience. It is central to it.

At the highest tier of the London commercial property market, this is well understood. The best-performing assets in the City, the West End, and London’s major business parks are managed by people who treat cleaning not as a cost to be minimised but as a service to be delivered, and who choose their contractors accordingly.

The difference between a standard cleaning contract and a premium one

The most important distinction in London’s cleaning market is not between expensive and cheap. It is between contracts that specify outputs and contracts that specify outcomes.

A standard cleaning contract tells the contractor what to do and how often to do it. Clean the offices Monday to Friday. Empty bins daily. Deep clean the washrooms weekly. It is a task list, not a service standard, and it will be delivered to the letter of the list, no more.

A premium cleaning contract, the kind that protects the value of a landmark building, specifies what the building should look and feel like. It defines the standard, not just the schedule. It sets out response times for reactive events. It requires real-time reporting. It embeds accountability at every level, from the frontline operative to the account director. And it treats the cleaning team not as background operatives but as an integral part of the building’s presentation.

This is the model JPC by Samsic describes as concierge-led cleaning. It borrows from the hospitality sector the principle that the people maintaining your environment are representing your brand, and it builds the operational infrastructure to deliver on that principle consistently.

The 8 questions every property manager should ask before signing

Whether you are going out to tender for the first time, reviewing an incumbent contractor, or benchmarking your current provision, these eight questions will tell you what you need to know.

1. How do you recruit and retain your frontline staff?

Staff turnover is the single biggest predictor of cleaning quality. A contractor with high turnover will never develop the site-specific knowledge that enables a team to work efficiently and proactively. Ask for turnover rates. Ask how staff are recruited. Ask what benefits and development programmes are in place. The best contractors, those who will actually maintain your standard, invest meaningfully in the people who deliver the service.

2. What accreditations and industry certifications do you hold?

Look for membership of the British Institute of Cleaning Science (BICSc), Safe Contractor accreditation, ISO 9001 quality management, and ISO 14001 environmental management as a minimum. For specialist environments such as data centres, life sciences, or healthcare-adjacent spaces, ask for environment-specific credentials. Award-winning credentials, such as IWFM Impact Awards or European Cleaning and Hygiene Awards, are strong independent signals of performance standards.

3. What does your reporting look like and what does it tell me?

A contractor who cannot show you a sample report before you sign is a contractor who does not want you to see their reporting. You should expect, at minimum, regular performance dashboards covering cleaning completion rates, reactive response times, staff attendance, and quality audit scores. Leading contractors will also provide ESG and sustainability data, occupier satisfaction tracking, and exception reporting, the ability to tell you when something has gone wrong before you notice it yourself.

4. How do you manage reactive and emergency events?

A spill in a client-facing area during a major meeting. An unexpected inspection. A VIP visitor arriving at short notice. These are not edge cases in a landmark London building, they are regular occurrences. Ask your contractor specifically how they respond. What is their guaranteed response time? Do they have a mobile cleaning team available during core business hours? Who do you call, and at what time of day or night can you reach them?

5. What is your approach to ESG and sustainability?

In 2026, this is not optional for institutional property owners. Your cleaning contractor sits within the Scope 3 emissions of your building’s ESG reporting, and an increasing number of asset managers and investors require demonstrable sustainability credentials from every supplier in their supply chain. Ask for specifics: low-carbon consumables, electric equipment, waste diversion rates, carbon reporting capability. If the answer is vague, the commitment is vague.

6. What technology are you currently using in service delivery?

Technology investment is a proxy for operational seriousness. A contractor using co-botic equipment, digital quality audits, customer experience mapping tools, and real-time reporting platforms is a contractor who has thought seriously about how to deliver your service reliably and accountably. A contractor whose technology is a paper-based sign-off sheet and a WhatsApp group is not.

7. Can you provide references from buildings comparable to mine?

Generic references are meaningless. You want to speak to a property manager overseeing a building with a similar profile to yours: comparable size, similar occupier mix, similar standards expectations. A contractor managing a business park on the outskirts of the city has not necessarily demonstrated they can maintain a landmark City of London tower. Insist on like-for-like references and follow them up.

8. How will you manage the TUPE transfer of existing staff?

If you are changing contractors, the Transfer of Undertakings (Protection of Employment) regulations will almost certainly apply. The incoming contractor must offer existing cleaning staff equivalent terms and conditions. How a contractor manages TUPE is a significant signal of their management capability, their HR rigour, and their ability to deliver a smooth transition. A poorly managed TUPE process causes operational disruption, staff anxiety, and service deterioration that can take months to resolve.

What a cleaning specification document should include

The specification is the foundation of the contract. If it is vague, the service will be vague. If it is generic, copied from a previous contractor’s template, it will deliver a generic result. A well-written specification for a premium London building should include:

• A clear scope of works, broken down by zone, floor, and space type.
• Cleaning frequencies for each area, distinguishing daily, weekly, and periodic tasks.
• Service hours, the times within which cleaning must be completed without disrupting occupiers.
• Staffing ratios, the minimum number of cleaning hours per square metre of managed space.
• Quality standards and measurable KPIs, with clear consequences for non-performance.
• Reactive cleaning protocols and guaranteed response times.
• Washroom and hygiene service specifications, including consumable supply obligations.
• Specialist cleaning requirements such as facade, window, atrium, and any technical or sensitive areas.
• ESG obligations, including sustainability reporting requirements.
• Technology and reporting obligations, what data you will receive and how often.
• Escalation and communication procedures, including named contacts at every level.

The specification should be written by the property management team, not by the contractor. A contractor given the opportunity to write their own specification will, predictably, write one they are comfortable delivering. Your job is to write the specification that your building requires.

ESG expectations in 2026: what responsible property owners are now requiring

The ESG expectations placed on cleaning contractors have shifted dramatically in the past three years, driven by changes in investor requirements, regulatory frameworks, and occupier demands. In 2026, a cleaning contract that does not address environmental and social governance is not fit for purpose for any building with institutional ownership or professionally managed occupiers.

On the environmental side, expect to specify low-carbon or zero-carbon consumables, electric or battery-powered cleaning equipment, waste segregation and diversion targets, water reduction protocols, and carbon reporting at both site and portfolio level. The most advanced contractors, JPC by Samsic among them, have developed in-house ESG reporting platforms that feed directly into the sustainability reports that asset managers and investors require.

On the social side: living wage compliance, investment in staff training and career progression, community engagement commitments, and evidence of diverse and inclusive recruitment practices are increasingly being written into contract requirements by responsible landlords. The cleaning workforce is one of the most ethnically diverse in London and the best contractors celebrate and invest in that workforce rather than treating it as interchangeable labour.

Red flags to watch for in the tender process

The tender process reveals a great deal about a contractor’s actual capabilities if you know what to look for.

Unrealistically low pricing

A price significantly below market rate does not mean the contractor is efficient. It means they are planning to cut staffing levels, use cheaper consumables, reduce management oversight, or most commonly, all three. The cost of a cleaning contract failure, measured in occupier dissatisfaction, management time, and reputational damage, almost always exceeds the saving.

Vague or generic KPIs

A contractor who cannot specify, in the tender response, what they will be measured on and what happens when they fall short, has no intention of being held accountable. Accountability requires specificity.

High staff turnover in the existing portfolio

Ask for this data explicitly. A contractor with a turnover rate above 40% is running a revolving-door model. Their service quality issues are structural, not incidental.

Absence of technology investment

A contractor still operating entirely on paper-based systems in 2026 has not invested in operational accountability. The absence of technology is not a neutral characteristic; it is evidence of a management approach that depends on not being measured.

Limited or non-comparable references

A contractor who cannot produce three references from buildings similar to yours within the past two years either does not have them or does not want you to speak to them. Either is disqualifying.

Making the decision

The best cleaning contractor for your building is the one who has the most relevant experience, the clearest understanding of your building’s requirements, the most transparent approach to reporting and accountability, and critically, the right people. Not just the right management team, but the right frontline operatives. The people who will be in your building at six in the morning and at ten at night. The people your occupiers will encounter in the lift lobby and the washroom. The people who, whether they are recognised for it or not, are representing your building every day.

That standard is not available at the lowest tender price. It is available from contractors who have decided that the quality of their people is the quality of their service, and who invest accordingly.

If you would like to discuss your building’s requirements with the JPC by Samsic team, or book a complimentary building walkthrough, visit jpcbysamsic.uk/talk-to-us.