Solar panels, heat pumps and insulation in Rainham conservation area
In the Rainham conservation area (Medway), 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 12 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. 145 homes inside the boundary have an energy certificate: 22.8% are solid-wall homes with no wall insulation, 36.6% heat with a gas boiler and 33.1% 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
145homes with an energy certificate
22.8%solid walls, no insulation
36.6%heated by a gas boiler
0heat pumps
Article 4: Medway 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 Rainham
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: 12 in the area (grade I: 1, II*: 0). 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 = 145)
Walls
Homes
Share
Solid wall (brick or stone), no insulation
33
22.8%
Cavity wall, filled
28
19.3%
Cavity wall, insulated (as built or unspecified)
25
17.2%
Cavity wall, partly insulated
23
15.9%
Cavity wall, unfilled
11
7.6%
Modern wall (U-value from the design)
7
4.8%
Solid wall, insulated
7
4.8%
Timber frame
7
4.8%
Solid wall, internal insulation
4
2.8%
Heating
Homes
Share
Communal heating
67
46.2%
Gas boiler
53
36.6%
Electric (storage heaters, panels, boiler)
25
17.2%
Loft / roof insulation
Homes
Share
No insulation
11
7.6%
Under 200 mm
20
13.8%
200 mm or more
16
11.0%
Insulated (depth not recorded)
36
24.8%
Flat or other home above
58
40.0%
Other
4
2.8%
Windows
Homes
Share
Double glazed
132
91.0%
Single glazed
10
6.9%
Secondary glazing
3
2.1%
CDE
Energy rating: B 1 (0.7%) · C 96 (66.2%) · D 29 (20.0%) · E 14 (9.7%) · F 3 (2.1%) · G 2 (1.4%). Houses and bungalows: 12% of the homes; solar panels on 0.0% of the certificates. Most common build period on the certificates: 1976-1982. Designated: 11 January 1977.
Compared with Medway and England
Share of homes
Rainham
All 24 areas in Medway
England
Solid walls, no insulation
22.8%
35.9%
48.7%
Gas boiler
36.6%
69.7%
66.4%
Rated D–G
33.1%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 72% of these are from 2020 or later (latest 13 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 Medway if in doubt.
Boundary: Medway Council via planning.data.gov.uk (entity 44009813, reference 6, 4.0 ha). Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.