Does your Wandsworth conservation area have an Article 4 direction? The site cannot tell you: the council does not publish its directions on planning.data.gov.uk, so you will need to ask it directly. Without a direction, the general conservation area rules apply.
Gas almost everywhere, pumps in one area
If you add up the table, 81% of houses in the areas have a gas boiler. Solid walls without insulation account for 62.1% (48.7% across England's conservation areas), and the spread is huge: in Alton it is 4% of 1,729 houses, in Totterdown Fields 99% of 905. The largest, Wandsworth Common, has 3,975 houses, 70% with such walls and gas at 88%.
Of the 264 heat pumps in the EPC register as of November 2026, 157 sit in Battersea Park with its 3,193 homes, more than half of all the areas' pumps. Check the street boundary on the area page or with the council. The rules are national, as at 21 October 2026, but the planning decision rests with Wandsworth council.