Solar panels, heat pumps and insulation in Bury St Edmunds Town Centre conservation area
In the Bury St Edmunds Town Centre conservation area (West Suffolk), 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 674 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. 1,674 homes inside the boundary have an energy certificate: 40.5% are solid-wall homes with no wall insulation, 70.5% heat with a gas boiler and 56.8% are rated D–G; 39 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
1,674homes with an energy certificate
40.5%solid walls, no insulation
70.5%heated by a gas boiler
39heat pumps
Article 4: West Suffolk does not publish Article 4 areas on planning.data.gov.uk — check with the council.
What needs planning permission in Bury St Edmunds Town Centre
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: 674 in the area (grade I: 29, II*: 36). 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: 42% 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 = 1,674)
Walls
Homes
Share
Solid wall (brick or stone), no insulation
678
40.5%
Cavity wall, insulated (as built or unspecified)
291
17.4%
Modern wall (U-value from the design)
243
14.5%
Timber frame
191
11.4%
Cavity wall, filled
93
5.6%
Cavity wall, unfilled
55
3.3%
Solid wall, internal insulation
37
2.2%
Cavity wall, partly insulated
31
1.9%
Solid wall, insulated
27
1.6%
Other or not known
17
1.0%
Cavity wall, internal or external insulation
6
0.4%
Solid wall, external insulation
3
0.2%
Solid wall, partly insulated
2
0.1%
Heating
Homes
Share
Gas boiler
1,180
70.5%
Electric (storage heaters, panels, boiler)
394
23.5%
Communal heating
51
3.0%
Heat pump
39
2.3%
Solid fuel (wood, coal)
6
0.4%
LPG
3
0.2%
Oil
1
0.1%
Loft / roof insulation
Homes
Share
No insulation
206
12.3%
Under 200 mm
316
18.9%
200 mm or more
410
24.5%
Insulated (depth not recorded)
211
12.6%
Flat or other home above
371
22.2%
Other
160
9.6%
Windows
Homes
Share
Double glazed
1,157
69.1%
Single glazed
302
18.0%
Secondary glazing
214
12.8%
Triple glazed
1
0.1%
BCDE
Energy rating: A 2 (0.1%) · B 186 (11.1%) · C 535 (32.0%) · D 580 (34.6%) · E 308 (18.4%) · F 47 (2.8%) · G 16 (1.0%). Houses and bungalows: 58% of the homes; solar panels on 0.1% of the certificates. Most common build period on the certificates: before 1900. Designated: 26 January 1973.
Compared with West Suffolk and England
Share of homes
Bury St Edmunds Town Centre
All 48 areas in West Suffolk
England
Solid walls, no insulation
40.5%
40.1%
48.7%
Gas boiler
70.5%
57.5%
66.4%
Rated D–G
56.8%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 51% of these are from 2020 or later (latest 31 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 West Suffolk if in doubt.
Boundary: West Suffolk Council via planning.data.gov.uk (entity 44007046, reference 2608, 84.8 ha); the council's appraisal or map. Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.