In Clapham (SW4) the split is 76% flats to 24% houses over 21,167 households, and the stock is Georgian and early Victorian.
Because 34% of Clapham is privately rented and 30% socially rented, a lot of SW4 work is agreed with a landlord or managing agent rather than the person opening the door.
Walls are with solid brick on the party and external walls — and lath and plaster over timber studs, the pattern behind 21,167 households inside the SW4 neighbourhood, so the fixing that matters in Clapham is chosen on site — the usual failure here is a plasterboard plug spun into lime plaster in SW4, which crumbles the key and drops the panel, the reality on the streets around Clapham Common.
Clapham sits inside the Congestion Charge zone as well as ULEZ, so both are itemised on the quote rather than absorbed into an hourly rate. What shapes the job more is the neighbourhood itself — the Common, Abbeville Village and the Old Town's Georgian houses — which is why a SW4 quote is not a Lambeth average.
Very tight CPZ hours, narrow terraces and share-house turnover every summer. Nearest station is Clapham Common (Northern), and one technician for a private path; two where a communal walkway has to stay open to residents while the work is done, so one can manage access while the other washes.