The SW1 stock around Eaton Square is post-war. ONS records 92% flats, 8% houses and 3,844 households in Belgravia.
Private renting sits at 30% and owner-occupation at 22%; the first group books gym equipment assembly at short notice, the second plans it.
Walls are precast concrete panels and dense blockwork in SW1, often with surface conduit — where 22% owner-occupation means the same home is booked again rather than a new tenant each year, so the fixing that matters in Belgravia is chosen on site — the usual failure here is drilling blind into a panel with reinforcement or a buried cable behind it on these streets — which is why Westminster City Council kerb rules get settled before the van is loaded.
Two streets can behave very differently in Belgravia: grosvenor estate stucco, embassies and cobbled mews behind Eaton Square. The quote reflects the street the job is actually on. Belgravia sits inside the Congestion Charge zone as well as ULEZ, so both are itemised on the quote rather than absorbed into an hourly rate.
Getting to the door matters as much as the job: estate parking rules, mews arches with height limits and listed staircases requiring protection. Sloane Square (Circle, District) is the nearest station, and one fitter for bikes, benches and rowers; two for treadmills, racks and multi-gyms, or wherever the machine must be carried above the ground floor.