Solar panels, heat pumps and insulation in Mapperley Park and Alexandra Park conservation area
In the Mapperley Park and Alexandra Park conservation area (Nottingham), 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 16 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. 1,951 homes inside the boundary have an energy certificate: 47.1% are solid-wall homes with no wall insulation, 75.6% heat with a gas boiler and 63.4% are rated D–G; 34 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
1,951homes with an energy certificate
47.1%solid walls, no insulation
75.6%heated by a gas boiler
34heat pumps
Article 4: Nottingham does not publish Article 4 areas on planning.data.gov.uk — check with the council.
What needs planning permission in Mapperley Park and Alexandra Park
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: 16 in the area (grade I: 0, 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: 63% 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 = 1,951)
Walls
Homes
Share
Solid wall (brick or stone), no insulation
918
47.1%
Cavity wall, filled
326
16.7%
Cavity wall, unfilled
226
11.6%
Cavity wall, insulated (as built or unspecified)
171
8.8%
Solid wall, internal insulation
80
4.1%
Modern wall (U-value from the design)
72
3.7%
Timber frame
52
2.7%
Cavity wall, partly insulated
44
2.3%
Other or not known
29
1.5%
Solid wall, insulated
23
1.2%
Solid wall, partly insulated
6
0.3%
Cavity wall, internal or external insulation
3
0.2%
Solid wall, external insulation
1
0.1%
Heating
Homes
Share
Gas boiler
1,475
75.6%
Electric (storage heaters, panels, boiler)
371
19.0%
Communal heating
70
3.6%
Heat pump
34
1.7%
Solid fuel (wood, coal)
1
0.1%
Loft / roof insulation
Homes
Share
No insulation
244
12.5%
Under 200 mm
220
11.3%
200 mm or more
434
22.2%
Insulated (depth not recorded)
199
10.2%
Flat or other home above
790
40.5%
Other
64
3.3%
Windows
Homes
Share
Double glazed
1,660
85.1%
Single glazed
247
12.7%
Secondary glazing
39
2.0%
Triple glazed
5
0.3%
CDE
Energy rating: A 2 (0.1%) · B 82 (4.2%) · C 630 (32.3%) · D 723 (37.1%) · E 438 (22.5%) · F 70 (3.6%) · G 6 (0.3%). Houses and bungalows: 37% of the homes; solar panels on 0.5% of the certificates. Most common build period on the certificates: 1900-1929.
Compared with Nottingham and England
Share of homes
Mapperley Park and Alexandra Park
All 31 areas in Nottingham
England
Solid walls, no insulation
47.1%
36.4%
48.7%
Gas boiler
75.6%
57.8%
66.4%
Rated D–G
63.4%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 52% of these are from 2020 or later (latest 30 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 Nottingham if in doubt.
Boundary: Nottingham City Council via planning.data.gov.uk (entity 44014080, reference 3013, 120.8 ha). Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.