Census 2021 puts Belgravia at 3,844 households with a median age of 38.1. The post-war stock is social-housing-led, which is why 8% houses and 92% flats need different handling in SW1.
Private renting sits at 30% and owner-occupation at 22%; the first group books pre-move-in cleaning at short notice, the second plans it.
Walls are precast concrete panels and dense blockwork in Belgravia, often with surface conduit — the reality on the streets around Eaton Square, 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.
Estate parking rules, mews arches with height limits and listed staircases requiring protection. Nearest station is Sloane Square (Circle, District), and one cleaner for a flat; two for a house, so the property is finished in one visit rather than split across a day.