Solar panels, heat pumps and insulation in Werrington conservation area
In the Werrington conservation area (Peterborough), 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 Peterborough covers part of this area (about 1% of it) and removes permitted development rights for replacement windows and doors, and other alterations to the house, alterations to the roof (e.g. rooflights), painting the outside, so there these need planning permission too. The area has 25 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. 122 homes inside the boundary have an energy certificate: 50.0% are solid-wall homes with no wall insulation, 95.9% heat with a gas boiler and 77.0% 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
122homes with an energy certificate
50.0%solid walls, no insulation
95.9%heated by a gas boiler
1heat pumps
Article 4: An Article 4 direction published by Peterborough covers part of this area (about 1% of it) and removes permitted development rights for replacement windows and doors, and other alterations to the house, alterations to the roof (e.g. rooflights), painting the outside, so there these need planning permission too. (1 The Green, Werrington; 105 Church Street, Werrington; 107 and 109 Church Street, Werrington; 26 The Green, Werrington; 44 Church Street, Werrington; 50 Church Street, Werrington)
What needs planning permission in Werrington
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
Inside the Article 4 part of the area: planning permission needed; elsewhere: no permission needed (permitted development)
Part 1 Class A, A.3(a)
Listed buildings: 25 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: 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 = 122)
Walls
Homes
Share
Solid wall (brick or stone), no insulation
61
50.0%
Cavity wall, filled
21
17.2%
Cavity wall, insulated (as built or unspecified)
20
16.4%
Timber frame
6
4.9%
Solid wall, insulated
4
3.3%
Cavity wall, unfilled
3
2.5%
Cavity wall, partly insulated
2
1.6%
Modern wall (U-value from the design)
2
1.6%
Solid wall, external insulation
1
0.8%
Solid wall, internal insulation
1
0.8%
Solid wall, partly insulated
1
0.8%
Heating
Homes
Share
Gas boiler
117
95.9%
Electric (storage heaters, panels, boiler)
3
2.5%
Communal heating
1
0.8%
Heat pump
1
0.8%
Loft / roof insulation
Homes
Share
No insulation
17
13.9%
Under 200 mm
29
23.8%
200 mm or more
52
42.6%
Insulated (depth not recorded)
17
13.9%
Flat or other home above
2
1.6%
Other
5
4.1%
Windows
Homes
Share
Double glazed
111
91.0%
Single glazed
7
5.7%
Secondary glazing
3
2.5%
Triple glazed
1
0.8%
CDE
Energy rating: B 2 (1.6%) · C 26 (21.3%) · D 69 (56.6%) · E 22 (18.0%) · F 3 (2.5%). Houses and bungalows: 95% of the homes; solar panels on 1.6% of the certificates. Most common build period on the certificates: before 1900. Designated: 19 June 1969.
Compared with Peterborough and England
Share of homes
Werrington
All 29 areas in Peterborough
England
Solid walls, no insulation
50.0%
40.0%
48.7%
Gas boiler
95.9%
59.8%
66.4%
Rated D–G
77.0%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 54% of these are from 2020 or later (latest 1 July 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 Peterborough if in doubt.
Boundary: Peterborough City Council via planning.data.gov.uk (entity 44001325, reference CA29, 13.9 ha); the council's appraisal or map. Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.