Solar panels, heat pumps and insulation in Sheerness : Mile Town conservation area
In the Sheerness : Mile Town conservation area (Swale), 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 11 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. 285 homes inside the boundary have an energy certificate: 47.0% are solid-wall homes with no wall insulation, 54.4% heat with a gas boiler and 57.2% 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
285homes with an energy certificate
47.0%solid walls, no insulation
54.4%heated by a gas boiler
0heat pumps
Article 4: Swale publishes its Article 4 areas on planning.data.gov.uk and none overlaps this area; a direction can still exist on paper, so check with the council.
What needs planning permission in Sheerness : Mile 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
No permission needed (permitted development)
Part 1 Class A, A.3(a)
Listed buildings: 11 in the area. 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: 81% 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 = 285)
Walls
Homes
Share
Solid wall (brick or stone), no insulation
134
47.0%
Modern wall (U-value from the design)
46
16.1%
Cavity wall, insulated (as built or unspecified)
31
10.9%
Timber frame
20
7.0%
Other or not known
13
4.6%
Cavity wall, unfilled
12
4.2%
Cavity wall, internal or external insulation
10
3.5%
Solid wall, insulated
7
2.5%
Solid wall, partly insulated
7
2.5%
Cavity wall, partly insulated
3
1.1%
Solid wall, internal insulation
2
0.7%
Heating
Homes
Share
Gas boiler
155
54.4%
Electric (storage heaters, panels, boiler)
118
41.4%
Communal heating
12
4.2%
Loft / roof insulation
Homes
Share
No insulation
57
20.0%
Under 200 mm
29
10.2%
200 mm or more
43
15.1%
Insulated (depth not recorded)
42
14.7%
Flat or other home above
87
30.5%
Other
27
9.5%
Windows
Homes
Share
Double glazed
270
94.7%
Single glazed
13
4.6%
Secondary glazing
2
0.7%
BCDE
Energy rating: B 25 (8.8%) · C 97 (34.0%) · D 99 (34.7%) · E 52 (18.2%) · F 4 (1.4%) · G 8 (2.8%). Houses and bungalows: 19% of the homes; solar panels on 0.0% of the certificates. Most common build period on the certificates: 1900-1929. Designated: 8 June 1976.
Compared with Swale and England
Share of homes
Sheerness : Mile Town
All 52 areas in Swale
England
Solid walls, no insulation
47.0%
48.7%
48.7%
Gas boiler
54.4%
76.3%
66.4%
Rated D–G
57.2%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 64% of these are from 2020 or later (latest 11 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 Swale if in doubt.
Boundary: Swale Borough Council via planning.data.gov.uk (entity 44016667, reference CA-SWL-40, 7.6 ha); the council's appraisal or map. Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.