Solar panels, heat pumps and insulation in Fairfield Road conservation area
In the Fairfield Road conservation area (Tower Hamlets), 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 22 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. 1,695 homes inside the boundary have an energy certificate: 28.9% are solid-wall homes with no wall insulation, 36.2% heat with a gas boiler and 35.5% 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
1,695homes with an energy certificate
28.9%solid walls, no insulation
36.2%heated by a gas boiler
34heat pumps
Article 4: Tower Hamlets publishes its Article 4 areas on planning.data.gov.uk and none overlaps this area; a direction can still exist on paper, so check with the council.
What needs planning permission in Fairfield Road
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: 22 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: 89% 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 = 1,695)
Walls
Homes
Share
Solid wall (brick or stone), no insulation
490
28.9%
Cavity wall, insulated (as built or unspecified)
379
22.4%
Modern wall (U-value from the design)
295
17.4%
Other or not known
243
14.3%
Solid wall, insulated
187
11.0%
Timber frame
31
1.8%
Cavity wall, filled
27
1.6%
Solid wall, internal insulation
12
0.7%
Cavity wall, partly insulated
10
0.6%
Cavity wall, unfilled
9
0.5%
Solid wall, partly insulated
9
0.5%
Cavity wall, internal or external insulation
3
0.2%
Heating
Homes
Share
Electric (storage heaters, panels, boiler)
950
56.0%
Gas boiler
613
36.2%
Communal heating
98
5.8%
Heat pump
34
2.0%
Loft / roof insulation
Homes
Share
No insulation
68
4.0%
Under 200 mm
91
5.4%
200 mm or more
55
3.2%
Insulated (depth not recorded)
232
13.7%
Flat or other home above
1,144
67.5%
Other
105
6.2%
Windows
Homes
Share
Double glazed
1,268
74.8%
Single glazed
220
13.0%
Secondary glazing
203
12.0%
Triple glazed
4
0.2%
BCDE
Energy rating: A 1 (0.1%) · B 326 (19.2%) · C 767 (45.3%) · D 440 (26.0%) · E 152 (9.0%) · F 7 (0.4%) · G 2 (0.1%). Houses and bungalows: 11% of the homes; solar panels on 0.1% of the certificates. Most common build period on the certificates: before 1900.
Compared with Tower Hamlets and England
Share of homes
Fairfield Road
All 61 areas in Tower Hamlets
England
Solid walls, no insulation
28.9%
41.8%
48.7%
Gas boiler
36.2%
61.1%
66.4%
Rated D–G
35.5%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 50% of these are from 2020 or later (latest 29 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 Tower Hamlets if in doubt.
Boundary: London Borough of Tower Hamlets via planning.data.gov.uk (entity 44003441, reference TH-38-FAC, 19.4 ha); the council's appraisal or map. Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.