In Balham (SW12) the split is 65% flats to 35% houses over 3,809 households, and the stock is mainly Victorian.
The renter-heavy mix here (48% owned, 41% privately rented) means a SW12 diary swings between short-notice tenancy deadlines and appointments set a fortnight out.
Walls are lath and plaster over timber studs; locally that also means with solid brick on the party and external walls, which is why London Borough of Lambeth kerb rules get settled before the van is loaded, so the fixing that matters in Balham is chosen on site — the usual failure here is a plasterboard plug spun into lime plaster in Balham, which crumbles the key and drops the panel, where 48% owner-occupation means the same home is booked again rather than a new tenant each year.
Balham 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 — bedford Hill's bars, Hildreth Street market and family terraces between the commons — which is why a SW12 quote is not a Lambeth average.
Getting to the door matters as much as the job: very tight CPZ, narrow streets and Art Deco blocks with small original lifts. Balham (Northern, Southern) is the nearest station, 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.