Solar panels, heat pumps and insulation in Town Centre 1 conservation area
In the Town Centre 1 conservation area (Luton), 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 Luton covers this area but deals with other things (such as changes of use); it does not change the rules below. The area has 25 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. 617 homes inside the boundary have an energy certificate: 19.9% are solid-wall homes with no wall insulation, 13.1% heat with a gas boiler and 41.2% are rated D–G; 13 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
617homes with an energy certificate
19.9%solid walls, no insulation
13.1%heated by a gas boiler
13heat pumps
Article 4: An Article 4 direction published by Luton covers this area but deals with other things (such as changes of use); it does not change the rules below. (Luton Town Centre and Surrounds (2023))
What needs planning permission in Town Centre 1
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: 25 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: 99% 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 = 617)
Walls
Homes
Share
Modern wall (U-value from the design)
299
48.5%
Solid wall (brick or stone), no insulation
123
19.9%
Cavity wall, partly insulated
55
8.9%
Cavity wall, insulated (as built or unspecified)
46
7.5%
Solid wall, insulated
33
5.3%
Solid wall, internal insulation
30
4.9%
Cavity wall, internal or external insulation
12
1.9%
Timber frame
9
1.5%
Other or not known
5
0.8%
Cavity wall, unfilled
2
0.3%
Solid wall, partly insulated
2
0.3%
Solid wall, external insulation
1
0.2%
Heating
Homes
Share
Electric (storage heaters, panels, boiler)
410
66.5%
Communal heating
113
18.3%
Gas boiler
81
13.1%
Heat pump
13
2.1%
Loft / roof insulation
Homes
Share
No insulation
36
5.8%
Under 200 mm
17
2.8%
200 mm or more
24
3.9%
Insulated (depth not recorded)
55
8.9%
Flat or other home above
413
66.9%
Other
72
11.7%
Windows
Homes
Share
Double glazed
565
91.6%
Single glazed
27
4.4%
Secondary glazing
25
4.1%
BCDE
Energy rating: B 117 (19.0%) · C 246 (39.9%) · D 185 (30.0%) · E 65 (10.5%) · F 3 (0.5%) · G 1 (0.2%). Houses and bungalows: 1% of the homes; solar panels on 0.0% of the certificates. Most common build period on the certificates: 1900-1929. Designated: 12 May 1998.
Compared with Luton and England
Share of homes
Town Centre 1
All 5 areas in Luton
England
Solid walls, no insulation
19.9%
39.8%
48.7%
Gas boiler
13.1%
40.0%
66.4%
Rated D–G
41.2%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 70% of these are from 2020 or later (latest 22 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 Luton if in doubt.
Boundary: Luton Borough Council via planning.data.gov.uk (entity 44016444, reference CA1, 11.0 ha); the council's appraisal or map. Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.