Solar panels, heat pumps and insulation in Adelphi Bexley Square conservation area
In the Adelphi Bexley Square conservation area (Salford), 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 Salford covers this area but deals with other things (such as changes of use); it does not change the rules below. The area has 10 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. 371 homes inside the boundary have an energy certificate: 17.5% are solid-wall homes with no wall insulation, 19.4% heat with a gas boiler and 29.1% are rated D–G; 6 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
371homes with an energy certificate
17.5%solid walls, no insulation
19.4%heated by a gas boiler
6heat pumps
Article 4: An Article 4 direction published by Salford covers this area but deals with other things (such as changes of use); it does not change the rules below. (2018 HMO Article 4 Direction)
What needs planning permission in Adelphi Bexley Square
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: 10 in the area (grade I: 0, 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: 82% 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 = 371)
Walls
Homes
Share
Cavity wall, insulated (as built or unspecified)
91
24.5%
Modern wall (U-value from the design)
74
19.9%
Other or not known
69
18.6%
Solid wall (brick or stone), no insulation
65
17.5%
Solid wall, insulated
42
11.3%
Cavity wall, filled
16
4.3%
Solid wall, internal insulation
6
1.6%
Cavity wall, unfilled
4
1.1%
Cavity wall, internal or external insulation
2
0.5%
Timber frame
2
0.5%
Heating
Homes
Share
Electric (storage heaters, panels, boiler)
289
77.9%
Gas boiler
72
19.4%
Heat pump
6
1.6%
Communal heating
4
1.1%
Loft / roof insulation
Homes
Share
No insulation
7
1.9%
Under 200 mm
4
1.1%
200 mm or more
11
3.0%
Insulated (depth not recorded)
56
15.1%
Flat or other home above
222
59.8%
Other
71
19.1%
Windows
Homes
Share
Double glazed
325
87.6%
Single glazed
41
11.1%
Secondary glazing
4
1.1%
Triple glazed
1
0.3%
BCDE
Energy rating: B 99 (26.7%) · C 164 (44.2%) · D 69 (18.6%) · E 39 (10.5%). Houses and bungalows: 18% of the homes; solar panels on 0.0% of the certificates. Most common build period on the certificates: 2003-2006. Designated: 1 January 1978.
Compared with Salford and England
Share of homes
Adelphi Bexley Square
All 16 areas in Salford
England
Solid walls, no insulation
17.5%
28.3%
48.7%
Gas boiler
19.4%
51.0%
66.4%
Rated D–G
29.1%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 62% of these are from 2020 or later (latest 15 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 Salford if in doubt.
Boundary: Salford City Council via planning.data.gov.uk (entity 44012727, reference HE1/1, 7.1 ha); the council's appraisal or map. Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.