What you could build at EN2 0QN: 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 Side, Enfield.
105extensions seen within 600 m in the last 10 years
8loft conversions within 600 m in the last 10 years
85.1extensions 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 Side.
Move to a home 20 m² bigger (about £665,000)
Stamp duty on the new home
£23,250
Estate agent on yours 1.2% + VAT
£7,848
Solicitors, buying and selling
£3,000
Survey
£600
Removals
£1,500
Money gone
£36,198
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
−£72,000
Money gone
−£14,500
On these figures, extending loses about £50,698 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.
26/02586/PRH
9, Wetherby Road, En2 0ns
Rear extension
Not needed / lawful
Jun 2026
26/01890/PRH
8, Holtwhite Avenue, En2 0rs
Side return or wrap-around
Approved
Jun 2026
26/01540/HOU
64, Chase Court Gardens, En2 8dj
Loft or dormer
Refused
Jun 2026
26/01525/HOU
10, Chase Side Avenue, En2 6ju
Rear extension
Not needed / lawful
Jun 2026
26/01644/PRH
37, Parsonage Gardens, En2 6js
Rear extension
Refused
Jun 2026
26/01637/PRH
20, White House Lane, En2 0ng
Two-storey extension
Approved
Jun 2026
26/01492/HOU
82, Lavender Hill, En2 0rq
Windows, doors or cladding
Approved
May 2026
26/01454/HOU
41, Chase Side, En2 6nb
Rear extension
Approved
May 2026
26/01216/HOU
25, Holtwhites Hill, En2 0ru
Side return or wrap-around
Approved
May 2026
26/01207/HOU
23, Parsonage Gardens, En2 6js
Rear extension
Withdrawn
Apr 2026
26/01247/PRH
24, Perry Mead, En2 8bp
Rear extension
Not needed / lawful
Apr 2026
26/01010/PRH
1, West Bank, En2 8du
Rear extension
Not needed / lawful
Apr 2026
26/00906/PRH
9, Conical Corner, En2 6sl
Rear extension
Approved
Mar 2026
26/00329/HOU
53, Chase Court Gardens, En2 8dj
Rear extension
Approved
Jan 2026
25/04056/HOU
25, Burlington Road, En2 0ll
Rear extension
Not needed / lawful
Dec 2025
25/03868/PRH
95, Chase Side, En2 6nl
Rear extension
Approved
Dec 2025
25/03614/HOU
33, Gentlemans Row, En2 6pu
Two-storey extension
Refused
Dec 2025
25/03484/HOU
25, Riverside Gardens, En2 6jw
Rear extension
Approved
Oct 2025
25/02801/HOU
5, Batley Road, En2 0jg
Loft or dormer
Approved
Nov 2025
25/02201/HOU
34, Chase Side, En2 6nf
Windows, doors or cladding
Refused
Sept 2025
25/02498/HOU
95, Chase Side, En2 6nl
Rear extension
Refused
Sept 2025
25/02514/HOU
21a, Bycullah Road, En2 8ed
Rear extension
Approved
Jan 2026
25/02622/HOU
168, Holtwhites Hill, En2 8bt
Loft or dormer
Refused
Sept 2025
25/02358/HOU
24, Holtwhites Hill, En2 0rp
Rear extension
Approved
Aug 2025
25/01745/HOU
38, Gordon Hill, En2 0qp
Rear extension
Approved
Aug 2025
25/02006/HOU
166, Holtwhites Hill, En2 8bt
Other householder work
Approved
Jun 2025
25/01137/HOU
14, Lynn Street, En2 0jy
Loft or dormer
Approved
Jun 2025
25/01495/HOU
178, Baker Street, En1 3js
Other householder work
Under consideration
–
25/01134/PMA
15, Chase Side Crescent, En2 0ja
Rear extension
Approved
Jul 2025
25/00846/HOU
98, Gordon Hill, En2 0qs
Outbuilding or garden room
Approved
Jun 2025
25/01184/HOU
42, Chase Court Gardens, En2 8dj
Loft or dormer
Approved
Jun 2025
25/01357/HOU
49, Perry Mead, En2 8bs
Rear extension
Approved
May 2025
25/01044/HOU
13, Chase Side Avenue, En2 6ju
Two-storey extension
Approved
May 2025
25/01283/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
–
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.