Solar panels, heat pumps and insulation in Whitehaven Town Centre conservation area
In the Whitehaven Town Centre conservation area (Cumberland), 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 135 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. 1,249 homes inside the boundary have an energy certificate: 37.5% are solid-wall homes with no wall insulation, 64.5% heat with a gas boiler and 46.7% 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
1,249homes with an energy certificate
37.5%solid walls, no insulation
64.5%heated by a gas boiler
0heat pumps
Article 4: Cumberland does not publish Article 4 areas on planning.data.gov.uk — check with the council.
What needs planning permission in Whitehaven Town Centre
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: 135 in the area (grade I: 1, II*: 5). 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: 80% 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 = 1,249)
Walls
Homes
Share
Solid wall (brick or stone), no insulation
468
37.5%
Cavity wall, insulated (as built or unspecified)
298
23.9%
Cavity wall, filled
174
13.9%
Cavity wall, unfilled
112
9.0%
Modern wall (U-value from the design)
47
3.8%
Cavity wall, partly insulated
41
3.3%
Solid wall, internal insulation
35
2.8%
Solid wall, insulated
33
2.6%
Timber frame
17
1.4%
Other or not known
13
1.0%
Solid wall, partly insulated
5
0.4%
Cavity wall, internal or external insulation
4
0.3%
Solid wall, external insulation
2
0.2%
Heating
Homes
Share
Gas boiler
806
64.5%
Electric (storage heaters, panels, boiler)
356
28.5%
Communal heating
86
6.9%
LPG
1
0.1%
Loft / roof insulation
Homes
Share
No insulation
124
9.9%
Under 200 mm
134
10.7%
200 mm or more
257
20.6%
Insulated (depth not recorded)
117
9.4%
Flat or other home above
594
47.6%
Other
22
1.8%
Windows
Homes
Share
Double glazed
954
76.4%
Single glazed
262
21.0%
Secondary glazing
30
2.4%
Triple glazed
3
0.2%
CDE
Energy rating: B 80 (6.4%) · C 586 (46.9%) · D 376 (30.1%) · E 177 (14.2%) · F 23 (1.8%) · G 7 (0.6%). Houses and bungalows: 20% of the homes; solar panels on 0.0% of the certificates. Most common build period on the certificates: before 1900. Designated: 1 January 1969.
Compared with Cumberland and England
Share of homes
Whitehaven Town Centre
All 51 areas in Cumberland
England
Solid walls, no insulation
37.5%
52.9%
48.7%
Gas boiler
64.5%
74.7%
66.4%
Rated D–G
46.7%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 48% of these are from 2020 or later (latest 28 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 Cumberland if in doubt.
Boundary: Cumberland Council via planning.data.gov.uk (entity 44004836, reference 7992, 81.0 ha); the council's appraisal or map. Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.