7–10 Chandos Street
A one-off deep clean that became the contract that still runs it.
What we did, and what it changed.
The job
A one-off deep clean before a Marylebone office opened in January 2026. No contract, no relationship, no reason to pick us other than availability and a price.
It became the contract that still runs the building — approximately 162 service hours a month.
Why it converted
Nothing clever happened. We did the deep clean to a written scope, on the date agreed, and the building opened on time.
Both of our largest accounts began exactly this way — a single job, done to a written scope, with nothing promised beyond it.
A pre-opening clean is an audition where the client can inspect every surface you touched.
Jamf agreed to be named and photographed. Nothing on this page is quoted or attributed to them.
Finished
How it was handed back.
What the job actually covered.
What was included
- Pre-opening deep clean before the office opened
- Reception and front of house
- Open-plan workspace and meeting rooms
- Ongoing managed contract following handover
What was not
- Anything outside the signed specification without agreement
Questions people ask about this kind of job.
We open in three weeks. Is that enough notice?
Do the contractors need to be off site before you start?
Does a deep clean have to turn into a contract?
Who is actually on site for a job like this?
Other projects
A building opens once, and the date does not move.
Everything else about a fit-out can slip a week. The day people walk in cannot, which is why the clean before it is the one job on the programme with no float in it.
The opening is the first impression
Every person through the door on day one — staff, clients, the landlord — forms a view of the building in the first ninety seconds. That view is mostly about surfaces, and it is very hard to revise later.
A pre-opening clean is an audition
The client can inspect every surface we touched, on the day, in good light. We would rather be judged on that than on a written proposal, which is why we take these jobs on buildings we have no relationship with.
Cleaning is not snagging
Both happen in the same fortnight and they are different trades. Knowing which marks are ours to remove and which belong to the contractor stops the finger-pointing that usually eats the last week.
Start with a walk of your building.
Forty-five minutes with the person who would manage your account, and a written proposal within 48 hours. Nothing to prepare, and no obligation at the end of it.
The Infinite Cleaning Solution.