Solar panels, heat pumps and insulation in Lakes Estate conservation area
In the Lakes Estate conservation area (Enfield), 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 Enfield covers this area, but the published data does not say which rights it removes — check the direction before any work. The area has 3 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. 830 homes inside the boundary have an energy certificate: 85.3% are solid-wall homes with no wall insulation, 84.0% heat with a gas boiler and 76.5% are rated D–G; 2 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
830homes with an energy certificate
85.3%solid walls, no insulation
84.0%heated by a gas boiler
2heat pumps
Article 4: An Article 4 direction published by Enfield covers this area, but the published data does not say which rights it removes — check the direction before any work. (Borough wide; The Lakes Estate)
What needs planning permission in Lakes Estate
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: 3 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: 66% 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 = 830)
Walls
Homes
Share
Solid wall (brick or stone), no insulation
708
85.3%
Cavity wall, insulated (as built or unspecified)
28
3.4%
Modern wall (U-value from the design)
19
2.3%
Timber frame
18
2.2%
Cavity wall, filled
13
1.6%
Solid wall, internal insulation
13
1.6%
Solid wall, insulated
12
1.4%
Cavity wall, unfilled
10
1.2%
Other or not known
3
0.4%
Solid wall, partly insulated
3
0.4%
Cavity wall, internal or external insulation
2
0.2%
Cavity wall, partly insulated
1
0.1%
Heating
Homes
Share
Gas boiler
697
84.0%
Electric (storage heaters, panels, boiler)
107
12.9%
Communal heating
24
2.9%
Heat pump
2
0.2%
Loft / roof insulation
Homes
Share
No insulation
197
23.7%
Under 200 mm
175
21.1%
200 mm or more
69
8.3%
Insulated (depth not recorded)
67
8.1%
Flat or other home above
303
36.5%
Other
19
2.3%
Windows
Homes
Share
Double glazed
632
76.1%
Single glazed
176
21.2%
Secondary glazing
20
2.4%
Triple glazed
2
0.2%
CDE
Energy rating: B 22 (2.7%) · C 173 (20.8%) · D 405 (48.8%) · E 190 (22.9%) · F 33 (4.0%) · G 7 (0.8%). Houses and bungalows: 34% of the homes; solar panels on 0.1% of the certificates. Most common build period on the certificates: 1900-1929. Designated: 1 January 2010.
Compared with Enfield and England
Share of homes
Lakes Estate
All 24 areas in Enfield
England
Solid walls, no insulation
85.3%
53.5%
48.7%
Gas boiler
84.0%
81.0%
66.4%
Rated D–G
76.5%
—
56.5%
Caveats
Certificates describe a home when it was assessed; 54% 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 Enfield if in doubt.
Boundary: London Borough of Enfield via planning.data.gov.uk (entity 44010295, reference CA31, 38.1 ha); the council's appraisal or map. Homes are placed by the coordinates of their UPRN (OS Open UPRN); addresses are not shown.