Solar panels, heat pumps and insulation in Keswick conservation area
In the Keswick conservation area (Lake District National Park Authority), 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 Lake District National Park Authority 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 33 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. 879 homes inside the boundary have an energy certificate: 56.4% are solid-wall homes with no wall insulation, 79.9% heat with a gas boiler and 67.5% 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
879homes with an energy certificate
56.4%solid walls, no insulation
79.9%heated by a gas boiler
0heat pumps
Article 4: An Article 4 direction published by Lake District National Park Authority 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. (Keswick Town Centre)
What needs planning permission in Keswick
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: 33 in the area (grade I: 1, II*: 2). 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: 43% 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 = 879)
Walls
Homes
Share
Solid wall (brick or stone), no insulation
496
56.4%
Cavity wall, insulated (as built or unspecified)
164
18.7%
Cavity wall, unfilled
67
7.6%
Modern wall (U-value from the design)
42
4.8%
Cavity wall, filled
35
4.0%
Solid wall, internal insulation
22
2.5%
Timber frame
18
2.0%
Solid wall, insulated
15
1.7%
Cavity wall, partly insulated
13
1.5%
Other or not known
4
0.5%
Cavity wall, internal or external insulation
2
0.2%
Solid wall, partly insulated
1
0.1%
Heating
Homes
Share
Gas boiler
702
79.9%
Electric (storage heaters, panels, boiler)
162
18.4%
Communal heating
11
1.3%
Solid fuel (wood, coal)
4
0.5%
Loft / roof insulation
Homes
Share
No insulation
223
25.4%
Under 200 mm
144
16.4%
200 mm or more
167
19.0%
Insulated (depth not recorded)
122
13.9%
Flat or other home above
184
20.9%
Other
39
4.4%
Windows
Homes
Share
Double glazed
762
86.7%
Single glazed
89
10.1%
Secondary glazing
25
2.8%
Other
3
0.3%
CDE
Energy rating: A 2 (0.2%) · B 46 (5.2%) · C 238 (27.1%) · D 338 (38.5%) · E 204 (23.2%) · F 42 (4.8%) · G 9 (1.0%). Houses and bungalows: 57% of the homes; solar panels on 0.9% of the certificates. Most common build period on the certificates: before 1900. Designated: 21 August 1981.
Compared with Lake District National Park Authority and England
Share of homes
Keswick
All 23 areas in Lake District National Park Authority
England
Solid walls, no insulation
56.4%
61.4%
48.7%
Gas boiler
79.9%
64.8%
66.4%
Rated D–G
67.5%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 43% 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 Lake District National Park Authority if in doubt.
Boundary: Lake District National Park Authority via planning.data.gov.uk (entity 44015628, reference CA04, 56.4 ha); the council's appraisal or map. Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.