In Soho (W1) the split is 98% flats to 2% houses over 4,257 households, and the stock is Georgian and early Victorian.
The renter-heavy mix here (20% owned, 52% privately rented) means a W1 diary swings between short-notice tenancy deadlines and appointments set a fortnight out.
Walls are dot-and-dab plasterboard over blockwork in W1, with metal stud partitions between rooms, with 28% social-rented stock locally, block access is agreed with the estate office first, so the fixing that matters in Soho is chosen on site — the usual failure here is short screws that grip only the board and slowly lever it off the dabs, as the Soho stock goes, a median age of 34 in this neighbourhood shapes what gets ordered here.
Post-production studios, restaurants and above-shop flats packed into a Georgian grid. That character decides the practical detail of mattress cleaning here far more than the borough boundary does. Soho sits inside the Congestion Charge zone as well as ULEZ, so both are itemised on the quote rather than absorbed into an hourly rate.
On access, pedestrian zones, night-time economy congestion and no lifts in most walk-ups — carry-up is the default — one reason one technician with a portable extraction machine and air mover on a single household booking; two technicians on HMO, student accommodation and serviced-apartment rounds where six or more mattresses are cleaned in a day. Fitters travelling in use Tottenham Court Road (Central, Northern, Elizabeth line).