Solar panels, heat pumps and insulation in Hinton Charterhouse conservation area
In the Hinton Charterhouse conservation area (Bath and North East Somerset), 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. The area has 18 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. 37 homes inside the boundary have an energy certificate: 81% are solid-wall homes with no wall insulation, 89% heat with a gas boiler and 92% are rated D–G; 1 has 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
37homes with an energy certificate
81%solid walls, no insulation
89%heated by a gas boiler
1heat pumps
Article 4: Bath and North East Somerset does not publish Article 4 areas on planning.data.gov.uk — check with the council.
What needs planning permission in Hinton Charterhouse
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: 18 in the area (grade I: 0, II*: 1). 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: 5% 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 = 37)
Walls
Homes
Share
Solid wall (brick or stone), no insulation
30
81%
Cavity wall, insulated (as built or unspecified)
4
11%
Cavity wall, unfilled
1
3%
Modern wall (U-value from the design)
1
3%
Solid wall, insulated
1
3%
Heating
Homes
Share
Gas boiler
33
89%
Electric (storage heaters, panels, boiler)
3
8%
Heat pump
1
3%
Loft / roof insulation
Homes
Share
No insulation
11
30%
Under 200 mm
8
22%
200 mm or more
8
22%
Insulated (depth not recorded)
9
24%
Other
1
3%
Windows
Homes
Share
Double glazed
28
76%
Single glazed
9
24%
CDEF
Energy rating: C 3 (8%) · D 19 (51%) · E 10 (27%) · F 5 (14%). Houses and bungalows: 95% of the homes; solar panels on 5% of the certificates. Most common build period on the certificates: before 1900. Designated: 14 December 1983.
Compared with Bath and North East Somerset and England
Share of homes
Hinton Charterhouse
All 35 areas in Bath and North East Somerset
England
Solid walls, no insulation
81%
53.0%
48.7%
Gas boiler
89%
73.5%
66.4%
Rated D–G
92%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 41% of these are from 2020 or later (latest 2 September 2025). “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 Bath and North East Somerset if in doubt.
Boundary: Bath and North East Somerset Council via planning.data.gov.uk (entity 44000217, reference 3574, 5.1 ha). Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.