Solar panels, heat pumps and insulation in Hans Town conservation area
In the Hans Town conservation area (Kensington and Chelsea), 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 Kensington and Chelsea covers this area and removes permitted development rights for replacement windows and doors, and other alterations to the house, so there these need planning permission too. The area has 67 listed buildings; on a listed building solar panels and heat pumps are not permitted development at all and need planning permission and listed building consent. 2,249 homes inside the boundary have an energy certificate: 76.6% are solid-wall homes with no wall insulation, 58.6% heat with a gas boiler and 50.7% are rated D–G; 55 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
2,249homes with an energy certificate
76.6%solid walls, no insulation
58.6%heated by a gas boiler
55heat pumps
Article 4: An Article 4 direction published by Kensington and Chelsea covers this area and removes permitted development rights for replacement windows and doors, and other alterations to the house, so there these need planning permission too. (Article 4 - No 100; Article 4 - No 106; Article 4 - No 60)
What needs planning permission in Hans Town
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)
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)
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)
Replacement windows and doors of similar appearance
Planning permission needed (an Article 4 direction here removes this right)
Part 1 Class A, A.3(a)
Listed buildings: 67 in the area (grade I: 0, II*: 6). The table is for houses that are not listed: on a listed building, solar panels and air source heat pumps are not permitted development at all (they need planning permission), and any of these works needs listed building consent.
Flats: 88% 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 = 2,249)
Walls
Homes
Share
Solid wall (brick or stone), no insulation
1,723
76.6%
Cavity wall, unfilled
105
4.7%
Solid wall, internal insulation
99
4.4%
Modern wall (U-value from the design)
98
4.4%
Timber frame
64
2.8%
Other or not known
33
1.5%
Cavity wall, partly insulated
32
1.4%
Solid wall, insulated
29
1.3%
Cavity wall, insulated (as built or unspecified)
25
1.1%
Solid wall, partly insulated
22
1.0%
Cavity wall, internal or external insulation
15
0.7%
Cavity wall, filled
3
0.1%
Heating
Homes
Share
Gas boiler
1,317
58.6%
Communal heating
672
29.9%
Electric (storage heaters, panels, boiler)
202
9.0%
Heat pump
55
2.4%
LPG
3
0.1%
Loft / roof insulation
Homes
Share
No insulation
316
14.1%
Under 200 mm
61
2.7%
200 mm or more
26
1.2%
Insulated (depth not recorded)
212
9.4%
Flat or other home above
1,566
69.7%
Other
67
3.0%
Windows
Homes
Share
Double glazed
982
43.7%
Single glazed
871
38.7%
Secondary glazing
385
17.1%
Triple glazed
11
0.5%
CDE
Energy rating: A 1 (0.0%) · B 152 (6.8%) · C 956 (42.5%) · D 834 (37.1%) · E 251 (11.2%) · F 44 (2.0%) · G 11 (0.5%). Houses and bungalows: 12% of the homes; solar panels on 0.0% of the certificates. Most common build period on the certificates: before 1900. Designated: 1 January 1971.
Compared with Kensington and Chelsea and England
Share of homes
Hans Town
All 44 areas in Kensington and Chelsea
England
Solid walls, no insulation
76.6%
79.7%
48.7%
Gas boiler
58.6%
72.9%
66.4%
Rated D–G
50.7%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 53% of these are from 2020 or later (latest 29 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 Kensington and Chelsea if in doubt.
Boundary: Royal Borough of Kensington and Chelsea via planning.data.gov.uk (entity 44012779, reference 21, 37.5 ha); the council's appraisal or map. Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.