What you could build at EN2 8JJ: the planning rules at this address, what neighbours have built and how big, planning decisions nearby, rough costs and the value an extension adds, and how to get started. In Chase Farm & The Ridgeway, Enfield.
12extensions seen within 600 m in the last 10 years
1loft conversions within 600 m in the last 10 years
53.4extensions per 1,000 homes in the neighbourhood (10 years)
● work seen on energy certificates · ● application approved · ● refused · ● pending or other · ● this postcode
The rules at this address
Houses usually have permitted development rights: some rear extensions (typically up to 3 m deep for a semi or terrace, 4 m detached), loft conversions within volume limits, and porches can go ahead without planning permission. Larger single-storey rear extensions (up to 6 m / 8 m) can use the “prior approval” neighbour scheme.
Not in a conservation area (from council registers).
Article 4 direction (Borough wide): some rights normally allowed have been removed here. Check what it covers with the council before relying on permitted development.
Listed buildings need listed building consent for most changes, inside and out: check the National Heritage List.
To be certain work is permitted development, apply for a lawful development certificate (about £129 for householders in England). Building regulations apply either way.
Across England and Wales, homes extended by a typical 30 m² and then resold rose about 11.1% more than similar homes nearby over the same years (124,884 resales). How extensions pay off by size, type and region.
Single-storey rear or side extension: about £2,000–£3,000 per m² (London £2,500–£4,000), plus fees and VAT
Loft conversion: about £45,000–£75,000 for a dormer; more for a mansard or hip-to-gable
Two-storey extension: about £1,800–£2,800 per m² of new floor
Garage conversion: about £15,000–£30,000
Basement: about £3,500–£5,000 per m², London mostly
Build costs are rough 2026 ranges from industry guides, not quotes. Get three quotes for your plans.
Move or improve?
The money you don't get back either way, for the same extra space in Chase Farm & The Ridgeway.
Move to a home 20 m² bigger (about £555,000)
Stamp duty on the new home
£17,750
Estate agent on yours 1.2% + VAT
£6,408
Solicitors, buying and selling
£3,000
Survey
£600
Removals
£1,500
Money gone
£29,258
Extend by 20 m²
Building, plus 15% for design, planning and contingency
£57,500
Less what it adds to your home's value 60% of the local price
−£66,000
Money gone
−£8,500
On these figures, extending loses about £37,758 less. Moving also changes the area, the schools and the commute; extending means months of building work and depends on planning.
Building costs vary a lot (a single-storey rear extension is often £2,000–£3,000 per m², more in London). How much space adds depends on the home and street: what extensions added to resale prices. A guide, not advice; nothing you type leaves this page.
Getting started
Look at what neighbours did. Open applications above to see drawings that were approved on similar houses, and who designed them.
Check the route: permitted development (with a lawful development certificate), prior approval for larger rear extensions, or full householder planning permission.
Get a measured survey and a designer: an architect, an architectural technologist or a designer who handles planning drawings.
Apply (householder permission is about £258 in England; councils aim to decide within 8 weeks).
Building regulations through the council's building control or an approved inspector, and party wall notices to neighbours if you build on or near the boundary.
Choose a builder: written quotes, a contract, staged payments, and check their insurance and references.
From energy certificates: an extension where a later certificate shows more floor space, a loft conversion where roof rooms appear. Certificates come with sales, lettings and some building work, so the year is when it was first seen.
Not every extension shows here. We only see building work when a new energy certificate is lodged, which happens when a home is sold, let or newly built. A loft or extension added since then won't appear, even with planning permission and building control sign-off, because those records aren't published as open data outside London. Missing work doesn't mean missing paperwork.
Loft or dormer
Approved
Apr 2026
26/00068/HOU
58, Ridge Crest, En2 8jx
Rear extension
Not needed / lawful
Nov 2025
25/03532/PRH
10, Farmlands, En2 8je
Rear extension
Approved
Jun 2025
25/01008/HOU
25, Hadley Road, En2 8jt
Loft or dormer
Approved
Jan 2025
24/04011/HOU
191, The Ridgeway, En2 8jr
Loft or dormer
Approved
Oct 2024
24/03201/HOU
35, Ridge Crest, En2 8ju
Rear extension
Approved
Nov 2024
24/02990/HOU
34, Friar Road, En2 8fz
Outbuilding or garden room
Approved
Oct 2024
24/02706/HOU
36, Friar Road, En2 8fz
Rear extension
Approved
Sept 2024
24/02569/HOU
1, Highridge Place, Oak Avenue, En2 8le
Two-storey extension
Approved
Jun 2024
24/01238/HOU
18, Oak Avenue, En2 8lb
Loft or dormer
Approved
Jun 2024
24/00686/HOU
11, Archer Way, En2 8fw
Rear extension
Approved
May 2024
24/00882/HOU
30, Hadley Road, En2 8js
Loft or dormer
Refused
Mar 2024
24/00312/HOU
11, Farmlands, En2 8je
Loft or dormer
Approved
Sept 2023
23/02343/HOU
32, Hadley Road, En2 8js
Two-storey extension
Refused
Sept 2023
23/01721/HOU
1, Highridge Place, Oak Avenue, En2 8le
Two-storey extension
Refused
Aug 2023
23/02219/HOU
9, Fairview Road, En2 8jd
Two-storey extension
Approved
Jul 2023
23/01980/HOU
32, Ridge Crest, En2 8jx
Rear extension
Approved
Jun 2023
23/00983/HOU
Chase Farm Hospital, The Ridgeway, En2 8jl
Other householder work
Not needed / lawful
May 2023
23/00738/PRV
8, Farmlands, En2 8je
Porch or front extension
Approved
May 2023
23/00985/HOU
32, Ridge Crest, En2 8jx
Rear extension
Withdrawn
Mar 2023
23/00440/PRH
11, Oak Avenue, En2 8lb
Two-storey extension
Approved
Jun 2023
23/00431/HOU
9, Fairview Road, En2 8jd
Two-storey extension
Withdrawn
Mar 2023
23/00009/HOU
32, Ridge Crest, En2 8jx
Rear extension
Withdrawn
Feb 2023
22/03733/PRH
28, Friar Road, En2 8fz
Rear extension
Approved
Feb 2023
23/00054/HOU
Householder applications validated since 2023 within 600 m. The council's page has the drawings, the decision notice and who the agent or architect was. Hover a row for the description. Source: GLA Planning London Datahub.
–
85% (116)
88%
7 weeks
Basement
–
53% (17)
83%
8 weeks
Porch or front extension
100% (6)
88% (74)
81%
7 weeks
Share of decided applications approved since 2023 (number decided in brackets). Withdrawn applications aren't counted; many are withdrawn when refusal looks likely.