Solar panels, heat pumps and insulation in Osney Town conservation area
In the Osney Town conservation area (Oxford), 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 Oxford 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), painting the outside, so there these need planning permission too. 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. 336 homes inside the boundary have an energy certificate: 48.5% are solid-wall homes with no wall insulation, 75.0% heat with a gas boiler and 55.1% are rated D–G; 14 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
336homes with an energy certificate
48.5%solid walls, no insulation
75.0%heated by a gas boiler
14heat pumps
Article 4: An Article 4 direction published by Oxford 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), painting the outside, so there these need planning permission too. (Houses in Multiple Occupation Article 4 Direction; The Osney Town Article 4 Direction 1993)
What needs planning permission in Osney Town
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: 7 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: 43% 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 = 336)
Walls
Homes
Share
Solid wall (brick or stone), no insulation
163
48.5%
Cavity wall, insulated (as built or unspecified)
75
22.3%
Solid wall, internal insulation
34
10.1%
Cavity wall, filled
18
5.4%
Cavity wall, unfilled
16
4.8%
Cavity wall, partly insulated
10
3.0%
Modern wall (U-value from the design)
6
1.8%
Solid wall, insulated
6
1.8%
Other or not known
4
1.2%
Timber frame
3
0.9%
Cavity wall, internal or external insulation
1
0.3%
Heating
Homes
Share
Gas boiler
252
75.0%
Electric (storage heaters, panels, boiler)
69
20.5%
Heat pump
14
4.2%
Communal heating
1
0.3%
Loft / roof insulation
Homes
Share
No insulation
55
16.4%
Under 200 mm
89
26.5%
200 mm or more
46
13.7%
Insulated (depth not recorded)
57
17.0%
Flat or other home above
85
25.3%
Other
4
1.2%
Windows
Homes
Share
Double glazed
300
89.3%
Single glazed
31
9.2%
Secondary glazing
4
1.2%
Triple glazed
1
0.3%
CDE
Energy rating: B 14 (4.2%) · C 137 (40.8%) · D 134 (39.9%) · E 47 (14.0%) · F 3 (0.9%) · G 1 (0.3%). Houses and bungalows: 57% of the homes; solar panels on 0.9% of the certificates. Most common build period on the certificates: 1900-1929. Designated: 16 July 1976.
Compared with Oxford and England
Share of homes
Osney Town
All 18 areas in Oxford
England
Solid walls, no insulation
48.5%
41.0%
48.7%
Gas boiler
75.0%
69.7%
66.4%
Rated D–G
55.1%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 54% of these are from 2020 or later (latest 20 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 Oxford if in doubt.
Boundary: Oxford City Council via planning.data.gov.uk (entity 44015797, reference SSLZMFZX0012, 14.9 ha); the council's appraisal or map. Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.