Single-storey rear extensions, lofts and side extensions you can build in Enfield without full planning — and the exceptions.
Evenly, and fast. Enfield granted 94 larger home extension notifications and refused 94, an exact 50.0% split against 34.6% across London, and told 680 households no prior approval was needed. It agreed an extension of time on 6.7% of applications, the lowest rate in London.
| Larger home extension route | Enfield | London |
|---|---|---|
| Prior approval not required | 680 | 9,067 |
| Granted | 94 | 1,930 |
| Refused | 94 | 3,646 |
| Grant rate | 50.0% | 34.6% |
| Extension of time agreed | 6.7% | 34.5% |
| Lawful development certificates | 1,810 | 36,657 |
Sources: MHCLG District Planning Application Statistics (PS1 and PS2), twelve quarters to March 2026. A zero in this return means the measure was not recorded for that borough, never that no such decisions exist. Open Government Licence v3.0.
In detailSingle-storey rear extension up to 3m deep (attached house) or 4m (detached); side extension up to half the original width; loft conversion up to 40m³ (terraced) or 50m³ (semi-detached); single-storey outbuilding within the curtilage; replacement windows and doors. All subject to material match, eaves setback (20cm), and not facing a highway.
No. Permitted Development rights apply only to houses (Class C3 dwellings). Flats and maisonettes require full planning for almost every external alteration.
Yes — significantly reduced. In a conservation area: side extensions and two-storey rear extensions are not PD; cladding is not PD; chimney removal needs planning; roof additions are restricted.
An LDC is a formal confirmation from the council that your proposal is lawful PD — recommended before building, useful when selling. Costs around £103 for council fees + drawings.
Yes. Building regulations are entirely separate from planning. Permitted Development removes the planning requirement only — you still need building control sign-off for structure, insulation, fire safety, drainage, and ventilation. We deliver both planning and building regs drawings.



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Every Enfield postcode district we draw in, the stock that dominates it and the authority that validates a permitted development scheme there. Enfield fees below are the statutory England rates for 2026, not permitted development scheme estimates.
| Postcode | Area | Dominant stock | What it means for a permitted development scheme |
|---|---|---|---|
| N14 | Southgate | 1930s semi-detached, Edwardian villas | Southgate sits wholly inside N14, so Enfield Council validates every permitted development scheme submitted from an N14 address. |
| N18 | Upper Edmonton | Victorian terraces, post-war estates | N18 covers Upper Edmonton only; Enfield Council handles the permitted development scheme. |
| N21 | Winchmore Hill | Edwardian villas, 1930s semi-detached | Winchmore Hill sits wholly inside N21, so Enfield Council validates every permitted development scheme submitted from an N21 address. |
| EN1 | Enfield Town / Bush Hill Park | Georgian fragments, 1930s semi-detached | A permitted development scheme at an EN1 address in Enfield Town / Bush Hill Park is determined by Enfield Council under its own Local Plan policies for Enfield Town / Bush Hill Park. |
| EN2 | Enfield / Forty Hill | Georgian fragments, 1930s semi-detached | EN2 covers Enfield / Forty Hill only; Enfield Council handles the permitted development scheme. |
| EN3 | Ponders End / Brimsdown | Post-war estates, Victorian terraces | A permitted development scheme at an EN3 address in Ponders End / Brimsdown is determined by Enfield Council under its own Local Plan policies for Ponders End / Brimsdown. |
| N11 | New Southgate / Bounds Green | Edwardian villas in Palmers Green and Winchmore Hill; 1930s semi-detached in Southgate; Victorian terraces in Edmonton; Metropolitan Green Belt north of the borough | New Southgate / Bounds Green is split at N11. Either Barnet Council or Enfield Council can determine a permitted development scheme here, so the N11 address is checked against both policies maps first. |
| EN4 | East Barnet / Cockfosters | Edwardian villas in Palmers Green and Winchmore Hill; 1930s semi-detached in Southgate; Victorian terraces in Edmonton; Metropolitan Green Belt north of the borough | EN4 straddles a boundary: East Barnet / Cockfosters addresses fall to Barnet Council or Enfield Council, so confirm which authority validates the permitted development scheme before submitting EN4 drawings. |
Roof pitch, wall build-up and plot depth change every few Enfield streets, and each one changes what a permitted development scheme can achieve at that address.
Conservation areas covering Enfield: Enfield Council runs 22, and Forty Hill, Enfield Town, Gentleman's Row are the ones Enfield owners meet most. A permitted development scheme inside a Enfield conservation area loses permitted development, so the Enfield submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Winchmore Hill a permitted development scheme is judged on the street elevation first.
Enfield permitted development status: there is no borough-wide direction from Enfield Council, so a permitted development scheme at a N9 address is normally still permitted development. We certify that with a £274 Lawful Development Certificate rather than leaving a Enfield sale to argue it later.
What Enfield is built from: Edwardian villas in Palmers Green and Winchmore Hill; 1930s semi-detached in Southgate; Victorian terraces in Edmonton; Metropolitan Green Belt north of the borough. Outer north London; Metropolitan Green Belt affects north; generally permissive elsewhere. That mix decides the permitted development scheme route in Enfield more than the postcode does.
Sources for this Enfield permitted development scheme page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.

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