The SW1 stock around St James's Palace is mixed-era. ONS records 95% flats, 5% houses and 3,927 households in St James's.
44% of households rent privately and 28% own, which is why flat-pack assembly demand here peaks around tenancy changeovers and completion dates.
St James's substrates run to dot-and-dab plasterboard over blockwork in SW1, with metal stud partitions between rooms — which is why Westminster City Council kerb rules get settled before the van is loaded. Nothing is drilled until the wall has been sounded, because in SW1, short screws that grip only the board and slowly lever it off the dabs — with 29% social-rented stock locally, block access is agreed with the estate office first is the mistake that costs a SW1 customer twice.
Two streets can behave very differently in St James's: gentlemen's clubs, galleries and Jermyn Street shirtmakers between the palace and Piccadilly. The quote reflects the street the job is actually on. St James's 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, royal Parks restrictions, listed building rules and narrow service entrances off Duke Street — one reason one fitter for most items; two for sliding-door wardrobes, bunk beds and anything that has to be carried up a shared stairwell. Fitters travelling in use Green Park (Piccadilly, Victoria, Jubilee).