Loft conversions · EN1–EN2
Loft Conversions in Enfield (EN1 & EN2)
Planning a loft conversion in Enfield? Most conversions here cost £40,000–£90,000 to build depending on type, your application is decided by the London Borough of Enfield, and the borough's terraces and semis mostly suit dormers and hip-to-gable schemes. Book a free site visit and we'll show you what your loft can become.
Planning in Enfield
Reading Enfield Council's loft approvals for EN1 and EN2
Enfield Council decides lofts across EN1 and EN2, and it publishes every decision. The newest loft decisions from the wards around Enfield Town, Bush Hill Park and Forty Hill are listed below with their outcomes, so you can see how the council treats roofs like yours before anything is drawn.
Two words are worth looking out for. Outrigger: plenty of Enfield's Edwardian terraces have a two-storey back addition, and a small dormer on its roof alongside the main rear dormer is how a loft gains a second room or a bathroom. Certificate: a lawful development certificate means Enfield checked the design against the permitted development limits and confirmed it fits. The exception is a house inside the Enfield Town, Bush Hill Park, Forty Hill or Clay Hill conservation areas, where no dormer is permitted development and a householder application is the only route; all four also have Article 4 directions. A conservation area's edge is a line on the council's map rather than a street name, so check your own house against that map, not the name of the road.
Recent loft decisions around Enfield
Extension, loft and basement applications decided in Enfield's Town, Ridgeway, Whitewebbs, Southbury, Bush Hill Park and Carterhatch wards, 23 Sep 2025 to 22 Sep 2026.
Loft decisions in those wards
- ApprovedSep 2026
Southbury Road, EN1
Single storey rear extension, rear dormer and front roof lights.
26/02936/CEA · Enfield CouncilLawful development certificate
- ApprovedSep 2026
St Marks Road, EN1
Rear dormer and rear outrigger dormer.
26/03260/CEA · Enfield CouncilLawful development certificate
- ApprovedSep 2026
Clay Hill, EN2
Extension to roof at sides, with rear dormer, rear outrigger dormer and front rooflights.
26/02911/CEA · Enfield CouncilLawful development certificate
- ApprovedAug 2026
Lincoln Road, EN1
Single storey rear extension, single storey side infill extension, rear dormer, dormer to rear outrigger and front roof lights.
26/02941/CEA · Enfield CouncilLawful development certificate
- ApprovedAug 2026
Pentrich Avenue, EN1
Single storey rear extension, rear dormer and front roof lights.
26/03043/CEA · Enfield CouncilLawful development certificate
- ApprovedAug 2026
Park Avenue, EN1
Rear dormer and front roof lights.
26/02844/CEA · Enfield CouncilLawful development certificate
- ApprovedAug 2026
Oak Avenue, EN2
Rear dormer, two side dormers and removal of chimney.
26/02753/CEA · Enfield CouncilLawful development certificate
- ApprovedAug 2026
Percival Road, EN1
Single storey rear and side infill extensions with rear dormer, rear outrigger dormer and front roof lights.
26/02834/CEA · Enfield CouncilLawful development certificate
Look a reference up on the council’s own register: Enfield Council planning search.
Source: GLA Planning London Datahub, 23 Sep 2025 – 22 Sep 2026. Data updated September 2026. This list last changed 23 September 2026. The datahub can lag a council’s own register by a few weeks.
These are council decisions on applications in these wards, shown as local planning context. They are not necessarily projects undertaken by us, and they are not our approval rate. Planning outcomes depend on your specific property and proposal.
Enfield's rooftops — and which loft suits each
Enfield is a big, varied borough, and the right loft depends entirely on your roof.
The Edwardian and inter-war terraces (Bush Hill Park, central Enfield Town). These long terraced streets rarely have a hip to convert, so the move is a rear dormer across the back slope — typically £40,000–£75,000 for a full-width double bedroom and en-suite — or a mansard (£60,000–£100,000) where you want maximum headroom and floor area along the whole rear roof. Part of Bush Hill Park is a conservation area, so confirm which side of its boundary you're on before assuming the dormer is permitted development.
The 1930s hipped semis (the EN1 avenues and Gordon Hill). Bay-fronted, hipped-roof Metroland semis suit the hip-to-gable conversion with rear dormer — squaring the side hip into a vertical wall and adding a dormer behind, usually £55,000–£90,000 for a double bedroom and bathroom.
Terraces and semis with rear back-additions. Where a property has an original rear outrigger, an L-shaped dormer — the main rear dormer plus a return over the addition — can open two or three rooms in one project (£65,000–£95,000).
Smaller and budget-conscious projects. Where head height is already generous, a Velux conversion keeps the roofline untouched and the cost down at £30,000–£45,000 — ideal for a study or a single bedroom.
Thinking about the ground floor too? House extensions in Enfield covers rear, side and wrap-around work across EN1 and EN2, and our loft conversions page explains how each type of loft is built. For the rest of the borough and beyond, see our guide to loft conversions across North London.
Honest numbers
What a loft conversion costs in Enfield in 2026
These are realistic all-in build ranges for Enfield — labour and materials to a good standard, excluding VAT, fees and loose furnishings:
| Loft type | Typical Enfield cost | On-site time | Usual planning route |
|---|---|---|---|
| Velux / rooflight conversion | £30,000 – £45,000 | 6–8 weeks | Permitted development |
| Rear dormer | £40,000 – £75,000 | 6–9 weeks | Usually permitted development |
| Hip-to-gable + rear dormer | £55,000 – £90,000 | 7–10 weeks | Usually permitted development |
| L-shaped dormer | £65,000 – £95,000 | 8–10 weeks | Usually permitted development |
| Mansard | £60,000 – £100,000 | 8–10 weeks | Often a full application |
As a rule of thumb, Enfield loft costs run £2,800–£4,200 per square metre — North London rates, comfortably above the national average. We give a fixed, itemised price after a free site visit, so the figure you sign is the figure you pay.
Permissions, handled
Planning a loft conversion in Enfield
Most Enfield lofts don't need a full planning application. Most loft conversions are covered by permitted development, which gives you a roof-volume allowance of 40 cubic metres on a terrace and 50 cubic metres on a semi or detached house, provided nothing pushes out beyond the original front roof slope.
For most homeowners the smart route is a Lawful Development Certificate (£274), confirming in writing that your loft was permitted development — invaluable when you come to sell. Where a full application is needed, typically for mansards, conservation-area roofs or homes that have already used their allowance, the planning fee is £548 (from April 2026) plus the £91.02 portal service charge, and Enfield aims to decide standard householder applications in around eight weeks.
Two more costs worth pencilling in. Building control sign-off lands at £500–£1,500. And with most Enfield homes being terraced or semi-detached, the Party Wall Act generally comes into it — reckon on £700–£2,500 per neighbour if surveyors are needed, though you pay nothing where your neighbour signs their consent within 14 days. We handle the notices and get them out early so they never hold up the build.
How it works
How it works
- Free site visit — we come and assess your Enfield roof, sizing up the head height and structure, and give you candid advice on the loft that fits, what it'll set you back and the planning route.
- Design & drawings — we work up a thorough set of plans and 3D visuals tailored to the roof you've got and the way your household lives in the house.
- Planning, handled — we assemble and lodge your certificate or application with Enfield Council and shepherd it all the way to a decision.
- Fixed-price build — construction is by Pine Grove's own North London team, who obtain building control sign-off and hand the finished room back to you spotless.
Our work
Recent work near Enfield
Our build team's recent North London projects include a full house transformation in Hadley Wood, on Enfield's western edge, taking a family home from 120m² to 360m² — see the Hadley Wood case study. Tell us at the visit what you want from the loft and we'll work it through against the roof sitting over your home.
Questions, answered
Enfield loft conversion FAQs
How much does a loft conversion cost in Enfield?
A rear dormer on a terrace is usually £40,000–£75,000, a hip-to-gable with rear dormer on a semi £55,000–£90,000, and a mansard £60,000–£100,000 — all before VAT and fees. Enfield sits on North London rates of roughly £2,800–£4,200/m². You'll have a fixed, itemised quote in hand after a free site visit.
Do I need planning permission for a loft conversion in Enfield?
Usually not — most lofts proceed under permitted development, which needs no application; a Lawful Development Certificate confirms it in writing. A full application comes into play mainly for mansards, dormers in a conservation area and homes whose permitted development rights are already used up.
What's the best loft for a 1930s semi in Enfield?
A hip-to-gable paired with a rear dormer. Gaining the side hip and the back slope at once typically delivers a double bedroom and en-suite from a hipped 1930s roof.
How long does an Enfield loft take to build?
Expect six to ten weeks on site depending on the scheme — a rooflight conversion at the short end, a mansard at the long. The preceding design and drawings stage takes a few weeks, and a Lawful Development Certificate is generally granted sooner than a full application.
Is my Enfield home in a conservation area?
Around Enfield Town the ones that matter for a loft are Enfield Town, Bush Hill Park, Forty Hill and Clay Hill, each with an Article 4 direction as well. At the free consultation, before any design work gets going, we run your address against the council's conservation map to find out whether yours is one of them.
Nearby areas we cover
Before you start a loft in Enfield
What clients say
Rated 5.0 on Google
“Used The Extension Company for a loft conversion on our semi detached in Barnet and couldn't be happier. They explained what was possible at the first visit, sorted the planning side, and gave a fixed price with no surprises at the end. The hip-to-gable and rear dormer gave us a big double bedroom with an en-suite. Tidy, professional and finished on schedule. Would recommend to anyone in North London thinking about a loft conversion.”
“We had been putting off our loft conversion for years because the whole process felt overwhelming. The team made it much easier than expected and handled the drawings, planning and build for us. We now have a lovely extra bedroom and shower room.”
“Excellent experience with The Extension Company. They completed our loft conversion and delivered exactly what they promised. The new bedroom and en-suite have added valuable space to our property in Barnet, the quality of the workmanship is first class. The team were friendly, knowledgeable and always happy to answer questions throughout the build.”
“Couldn't be happier with our loft conversion. We were expecting the build to be stressful, but it was actually a lot easier than we'd imagined. The lads were friendly, worked hard, and the quality of the finish is spot on. The extra room has made a massive difference and has given us the space we needed without having to move. Very pleased with the end result.”
“The Extension Company built a 5m single storey rear extension on our Victorian terrace in Crouch End. Went down the permitted development route so no planning application needed, which they explained up front and saved us months. Kitchen-diner now opens onto the garden with sliding doors. £87k all in, matched the quote.”
“From the initial site visit onwards to my property in Barnet, we felt that the team actually listened to what we wanted. They suggested a few changes to the layout that we hadn't considered, and those changes have made a huge difference. Would definitely use again and recommend”
Reviews shown word for word from our Google profile. See 9 more client reviews · Read all 16 reviews on Google
Ready to see what's possible on your street?
Free site visit anywhere in Enfield, honest feasibility advice and a fixed, itemised price — design, planning and build handled end to end.
Or call us — 020 3051 9430