Solar panels, heat pumps and insulation in Vauxhall Gardens conservation area
In the Vauxhall Gardens conservation area (Lambeth), external wall insulation needs planning permission, and so does an air source heat pump on a wall or roof facing the road; one at the back or side, internal and loft insulation and solar panels on a roof slope normally do not. An Article 4 direction published by Lambeth covers part of this area (about 0% of it), but the published data does not say which rights it removes — check the direction before any work. 346 homes inside the boundary have an energy certificate: 91.6% are solid-wall homes with no wall insulation, 88.2% heat with a gas boiler and 30.1% are rated D–G; 0 have a heat pump. EPC register November 2026; rules as at 21 October 2026.
Data: EPC register November 2026 (latest certificate per home), conservation area boundaries 3 November 2026, permitted development rules as at 21 October 2026 · calculated 5 November 2026 · Methodology and sources
346homes with an energy certificate
91.6%solid walls, no insulation
88.2%heated by a gas boiler
0heat pumps
Article 4: An Article 4 direction published by Lambeth covers part of this area (about 0% of it), but the published data does not say which rights it removes — check the direction before any work. (Modified Direction 1 - CAZ)
What needs planning permission in Vauxhall Gardens
Work (house, not listed)
In a conservation area
Rule
Air source heat pump on a wall or roof facing the road, or nearer the road than the house
Planning permission needed
Part 14 Class G, G.1(j)
Air source heat pump at the back or side (outdoor unit up to 1.5 m³, MCS Planning Standards, one per house — two on a detached house)
No permission needed (permitted development), unless an Article 4 direction removes it — check with the council
Part 14 Class G
Solar panels on a pitched roof (up to 0.2 m proud, not above the ridge)
No permission needed (permitted development), unless an Article 4 direction removes it — check with the council
Part 14 Class A, A.2(c)
Solar panels on a wall, balcony or roof enclosure facing the road
Planning permission needed
Part 14 Class A, A.2(e)
Solar panels on a flat roof (up to 0.6 m above the roof)
Prior approval of appearance from the council, unless an Article 4 direction removes it — check with the council
Replacement windows and doors of similar appearance
No permission needed (permitted development), unless an Article 4 direction removes it — check with the council
Part 1 Class A, A.3(a)
Listed buildings: none recorded inside the boundary; on a listed building, solar panels and heat pumps are not permitted development and need listed building consent.
Flats: 100% of the certified homes here are flats or maisonettes. Homes in a block of flats have no householder rights for alterations; heat pumps and solar have their own, tighter rules for blocks of flats.
The homes in the area (latest certificate per home, n = 346)
Walls
Homes
Share
Solid wall (brick or stone), no insulation
317
91.6%
Cavity wall, insulated (as built or unspecified)
10
2.9%
Other or not known
9
2.6%
Solid wall, partly insulated
3
0.9%
Cavity wall, unfilled
2
0.6%
Cavity wall, filled
1
0.3%
Cavity wall, internal or external insulation
1
0.3%
Modern wall (U-value from the design)
1
0.3%
Solid wall, insulated
1
0.3%
Timber frame
1
0.3%
Heating
Homes
Share
Gas boiler
305
88.2%
Communal heating
40
11.6%
LPG
1
0.3%
Loft / roof insulation
Homes
Share
No insulation
60
17.3%
Under 200 mm
2
0.6%
200 mm or more
5
1.4%
Insulated (depth not recorded)
9
2.6%
Flat or other home above
270
78.0%
Windows
Homes
Share
Double glazed
342
98.8%
Single glazed
4
1.2%
CD
Energy rating: B 5 (1.4%) · C 237 (68.5%) · D 95 (27.5%) · E 9 (2.6%). Houses and bungalows: 0% of the homes; solar panels on 0.0% of the certificates. Most common build period on the certificates: 1930-1949. Designated: 26 November 2001.
Compared with Lambeth and England
Share of homes
Vauxhall Gardens
All 65 areas in Lambeth
England
Solid walls, no insulation
91.6%
64.5%
48.7%
Gas boiler
88.2%
73.7%
66.4%
Rated D–G
30.1%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 73% of these are from 2020 or later (latest 20 October 2026). “No insulation (assumed)” is the assessor's default for older walls.
The rules are England's national permitted development rules (General Permitted Development Order 2015, Schedule 2, as at 21 October 2026). They do not cover building regulations or a council's own conditions. This is not a planning decision: ask Lambeth if in doubt.
Boundary: London Borough of Lambeth via planning.data.gov.uk (entity 44008838, reference CA56, 4.8 ha). Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.