Solar panels, heat pumps and insulation in Dean Park conservation area
In the Dean Park conservation area (Bournemouth, Christchurch and Poole), 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 1 listed building; on a listed building solar panels and heat pumps are not permitted development at all and need planning permission and listed building consent. 692 homes inside the boundary have an energy certificate: 1.4% are solid-wall homes with no wall insulation, 65.6% heat with a gas boiler and 39.2% are rated D–G; 21 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
692homes with an energy certificate
1.4%solid walls, no insulation
65.6%heated by a gas boiler
21heat pumps
Article 4: Bournemouth, Christchurch and Poole does not publish Article 4 areas on planning.data.gov.uk — check with the council.
What needs planning permission in Dean Park
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: 1 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: 93% 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 = 692)
Walls
Homes
Share
Cavity wall, unfilled
213
30.8%
Cavity wall, insulated (as built or unspecified)
204
29.5%
Cavity wall, filled
95
13.7%
Cavity wall, partly insulated
75
10.8%
Timber frame
64
9.2%
Modern wall (U-value from the design)
27
3.9%
Solid wall (brick or stone), no insulation
10
1.4%
Cavity wall, internal or external insulation
2
0.3%
Solid wall, insulated
1
0.1%
Solid wall, partly insulated
1
0.1%
Heating
Homes
Share
Gas boiler
454
65.6%
Electric (storage heaters, panels, boiler)
211
30.5%
Heat pump
21
3.0%
Communal heating
5
0.7%
LPG
1
0.1%
Loft / roof insulation
Homes
Share
No insulation
45
6.5%
Under 200 mm
68
9.8%
200 mm or more
44
6.4%
Insulated (depth not recorded)
76
11.0%
Flat or other home above
440
63.6%
Other
19
2.7%
Windows
Homes
Share
Double glazed
635
91.8%
Single glazed
50
7.2%
Secondary glazing
7
1.0%
BCDE
Energy rating: B 78 (11.3%) · C 343 (49.6%) · D 188 (27.2%) · E 75 (10.8%) · F 6 (0.9%) · G 2 (0.3%). Houses and bungalows: 7% of the homes; solar panels on 0.0% of the certificates. Most common build period on the certificates: 1900-1929. Designated: 11 May 1993.
Compared with Bournemouth, Christchurch and Poole and England
Share of homes
Dean Park
All 47 areas in Bournemouth, Christchurch and Poole
England
Solid walls, no insulation
1.4%
6.4%
48.7%
Gas boiler
65.6%
63.6%
66.4%
Rated D–G
39.2%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 50% 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 Bournemouth, Christchurch and Poole if in doubt.
Boundary: Bournemouth, Christchurch and Poole Council via planning.data.gov.uk (entity 44017455, reference DEAN, 29.4 ha); the council's appraisal or map. Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.