Solar panels, heat pumps and insulation in Harborne Old Village conservation area
In the Harborne Old Village conservation area (Birmingham), 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 Birmingham covers this area but deals with other things (such as changes of use); it does not change the rules below. The area has 7 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. 61 homes inside the boundary have an energy certificate: 25% are solid-wall homes with no wall insulation, 97% heat with a gas boiler and 51% 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
61homes with an energy certificate
25%solid walls, no insulation
97%heated by a gas boiler
1heat pumps
Article 4: An Article 4 direction published by Birmingham covers this area but deals with other things (such as changes of use); it does not change the rules below. (CITY WIDE HMO; SELLY OAK HMO)
What needs planning permission in Harborne Old Village
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: 7 in the area. 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: 69% 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 = 61)
Walls
Homes
Share
Cavity wall, insulated (as built or unspecified)
19
31%
Solid wall (brick or stone), no insulation
15
25%
Cavity wall, unfilled
10
16%
Solid wall, insulated
7
11%
Cavity wall, filled
6
10%
Cavity wall, partly insulated
2
3%
Modern wall (U-value from the design)
1
2%
Timber frame
1
2%
Heating
Homes
Share
Gas boiler
59
97%
Communal heating
1
2%
Heat pump
1
2%
Loft / roof insulation
Homes
Share
No insulation
8
13%
Under 200 mm
11
18%
200 mm or more
7
11%
Insulated (depth not recorded)
9
15%
Flat or other home above
25
41%
Other
1
2%
Windows
Homes
Share
Double glazed
49
80%
Secondary glazing
6
10%
Single glazed
6
10%
BCDE
Energy rating: A 1 (2%) · B 11 (18%) · C 18 (30%) · D 22 (36%) · E 9 (15%). Houses and bungalows: 31% of the homes; solar panels on 0% of the certificates. Most common build period on the certificates: 1983-1990. Designated: 17 July 1969.
Compared with Birmingham and England
Share of homes
Harborne Old Village
All 29 areas in Birmingham
England
Solid walls, no insulation
25%
31.3%
48.7%
Gas boiler
97%
46.8%
66.4%
Rated D–G
51%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 64% of these are from 2020 or later (latest 16 June 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 Birmingham if in doubt.
Boundary: Birmingham City Council via planning.data.gov.uk (entity 44009831, reference 6, 24.9 ha); the council's appraisal or map. Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.