In Dartmouth Park (NW5) the split is 72% flats to 28% houses over 3,395 households, and the stock is mainly Victorian.
The social-housing-led mix here (45% owned, 18% privately rented) means a NW5 diary swings between short-notice tenancy deadlines and appointments set a fortnight out.
Walls are precast concrete panels and dense blockwork in Dartmouth Park, often with surface conduit, where 45% owner-occupation means the same home is booked again rather than a new tenant each year, so the fixing that matters in Dartmouth Park is chosen on site — the usual failure here is drilling blind into a panel with reinforcement or a buried cable behind it, as the Dartmouth Park stock goes, which is what a 72% flat share across the ONS neighbourhood covering Dartmouth Park actually produces.
Dartmouth Park 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 — steep Victorian streets between Highgate Cemetery and the eastern edge of Hampstead Heath — which is why a NW5 quote is not a Camden average.
Getting to the door matters as much as the job: steep gradients, resident permit bays and long communal stair runs in the conversions. Tufnell Park (Northern) is the nearest station, and 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.