Solar panels, heat pumps and insulation in St. Mary's, Prestwich conservation area
In the St. Mary's, Prestwich conservation area (Bury), 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 Bury covers this area and removes permitted development rights for replacement windows and doors, and other alterations to the house, alterations to the roof (e.g. rooflights), chimneys, flues and soil pipes, so there these need planning permission too. The area has 30 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. 169 homes inside the boundary have an energy certificate: 27.8% are solid-wall homes with no wall insulation, 83.4% heat with a gas boiler and 55.6% 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
169homes with an energy certificate
27.8%solid walls, no insulation
83.4%heated by a gas boiler
0heat pumps
Article 4: An Article 4 direction published by Bury covers this area and removes permitted development rights for replacement windows and doors, and other alterations to the house, alterations to the roof (e.g. rooflights), chimneys, flues and soil pipes, so there these need planning permission too. (Bury borough HMO; St. Mary's, Prestwich)
What needs planning permission in St. Mary's, Prestwich
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: 30 in the area (grade I: 1, II*: 1). 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: 56% 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 = 169)
Walls
Homes
Share
Solid wall (brick or stone), no insulation
47
27.8%
Cavity wall, filled
43
25.4%
Cavity wall, insulated (as built or unspecified)
32
18.9%
Cavity wall, unfilled
25
14.8%
Modern wall (U-value from the design)
8
4.7%
Solid wall, internal insulation
6
3.6%
Solid wall, insulated
4
2.4%
Timber frame
3
1.8%
Cavity wall, partly insulated
1
0.6%
Heating
Homes
Share
Gas boiler
141
83.4%
Electric (storage heaters, panels, boiler)
28
16.6%
Loft / roof insulation
Homes
Share
No insulation
22
13.0%
Under 200 mm
27
16.0%
200 mm or more
31
18.3%
Insulated (depth not recorded)
27
16.0%
Flat or other home above
54
32.0%
Other
8
4.7%
Windows
Homes
Share
Double glazed
163
96.4%
Single glazed
4
2.4%
Secondary glazing
1
0.6%
Triple glazed
1
0.6%
CDE
Energy rating: B 11 (6.5%) · C 64 (37.9%) · D 60 (35.5%) · E 26 (15.4%) · F 8 (4.7%). Houses and bungalows: 44% of the homes; solar panels on 0.6% of the certificates. Most common build period on the certificates: 1900-1929. Designated: 1 January 1993.
Compared with Bury and England
Share of homes
St. Mary's, Prestwich
All 12 areas in Bury
England
Solid walls, no insulation
27.8%
55.4%
48.7%
Gas boiler
83.4%
82.5%
66.4%
Rated D–G
55.6%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 54% of these are from 2020 or later (latest 21 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 Bury if in doubt.
Boundary: Bury Metropolitan Borough Council via planning.data.gov.uk (entity 44015751, reference CA010, 38.5 ha); the council's appraisal or map. Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.