House Extension Drawings in Enfield

Which postcode districts around Enfield do we cover for house extension work?

Every Enfield postcode district we draw in, the stock that dominates it and the authority that validates a house extension there. Enfield fees below are the statutory England rates for 2026, not house extension estimates.

Which Enfield neighbourhoods suit a house extension best?

Roof pitch, wall build-up and plot depth change every few Enfield streets, and each one changes what a house extension can achieve at that address.

• Winchmore Hill (N21) — a house extension in Winchmore Hill starts from edwardian villas, 1930s semi-detached, and Winchmore Hill reads as Edwardian villas, conservation. Edwardian plots here are wider in N21. Enfield Council assesses Winchmore Hill house extensions against its own Winchmore Hill character guidance, and the location plan we draw for Winchmore Hill references Winchmore Hill Green.
• Southgate (N14) — a house extension in Southgate starts from 1930s semi-detached, edwardian villas, and Southgate reads as 1930s semi-detached, Edwardian. Edwardian plots here are wider in N14. Enfield Council assesses Southgate house extensions against its own Southgate character guidance, and the location plan we draw for Southgate references Southgate Tube.
• Edmonton (N9, N18) — house extension work in Edmonton means victorian terraces, post-war estates. Edmonton is Victorian terraces, post-war estates. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage throughout N9. Enfield Council decides the Edmonton application, and Edmonton Green anchors the Edmonton location plan.
• Ponders End (EN3) — house extension work in Ponders End means post-war estates, victorian terraces. Ponders End is post-war estates, Victorian fragments. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage throughout EN3. Enfield Council decides the Ponders End application, and Ponders End station anchors the Ponders End location plan.
• Bush Hill Park (EN1) — Edwardian conservation area defines Bush Hill Park, where edwardian villas set what a house extension can do. Edwardian plots here are wider across EN1. Any Bush Hill Park house extension is validated by Enfield Council, with Bush Hill Park station the usual Bush Hill Park reference point on the site plan.
• Oakwood (N14) — a house extension in Oakwood starts from 1930s semi-detached, and Oakwood reads as 1930s semi-detached. 1930s semis here have the deepest rear gardens in the area in N14. Enfield Council assesses Oakwood house extensions against its own Oakwood character guidance, and the location plan we draw for Oakwood references Oakwood Tube.
• Enfield Town (EN1, EN2) — house extension work in Enfield Town means georgian fragments, 1930s semi-detached. Enfield Town is Georgian centre, 1930s residential ring. Georgian rear elevations here are usually the listed or locally listed face of the building throughout EN1. Enfield Council decides the Enfield Town application, and Enfield Market anchors the Enfield Town location plan.

Does Enfield planning policy restrict a house extension?

Enfield conservation designations: there are 22 across Enfield Council, Enfield Town, Gentleman's Row, Winchmore Hill among them. Designation costs a Enfield owner the permitted-development route: a house extension then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Winchmore Hill is the Enfield designation that most often changes a house extension design.

No blanket Article 4 over Enfield: Enfield Council has not withdrawn permitted development across Enfield, so a house extension outside a Enfield conservation area usually keeps it. The £274 Lawful Development Certificate is still the document a N9 owner wants on file.

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 house extension route in Enfield more than the postcode does, and it is what a Enfield Council case officer reads first. A householder application costs £548 paid to Enfield Council direct, with 8 weeks to a decision once validated.

What happens if a Enfield property sits on a boundary?

• Barnet — the Barnet boundary runs against Enfield, so a house extension a street from Enfield is decided by Barnet Council instead. Barnet runs 20 conservation areas across N2 and its neighbours, which is why house extensions priced for Enfield are re-checked against Barnet policy whenever the Enfield address sits on that edge.
• Haringey — the Haringey boundary runs against Enfield, so a house extension a street from Enfield is decided by Haringey Council instead. Haringey runs 29 conservation areas across N4 and its neighbours, which is why house extensions priced for Enfield are re-checked against Haringey policy whenever the Enfield address sits on that edge.
• Waltham Forest — the Waltham Forest boundary runs against Enfield, so a house extension a street from Enfield is decided by Waltham Forest Council instead. Waltham Forest runs 17 conservation areas across E4 and its neighbours, which is why house extensions priced for Enfield are re-checked against Waltham Forest policy whenever the Enfield address sits on that edge.

Sources for this Enfield house extension 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.