Area guide · N14
House Extensions in Oakwood (N14)
Planning a house extension in Oakwood? We design, gain planning permission and build extensions and loft conversions across Oakwood's 1930s avenues. Most single-storey rear extensions in Oakwood cost £45,000–£90,000 to build, applications go to Enfield Council, and the two schemes Oakwood's hipped-roof semis were made for are 6m rear extensions under prior approval and hip-to-gable lofts. Start with a free site visit and we'll map precisely what your particular street allows.
Planning in Oakwood
What Enfield Council approves in Oakwood, and the 6m route
Oakwood has an Enfield ward of its own, and the decisions below all come from it, newest first. The ward is bigger than the streets around the station: it runs north into EN2 and takes in a corner of N21, so EN2 and N21 addresses sit alongside N14 ones.
Its decisions read like a list of what 1930s semis and detached houses ask for: garages turned into rooms, side extensions over the old garage line at one or two storeys, porches, hip-to-gable lofts and single-storey rears. Householder applications far outnumber certificates here. A two-storey side extension can never be permitted development, and nor can an extension built forward of the front wall (a small porch aside), so much of this work needs Enfield's permission whatever the street.
For rear extensions, the route worth knowing is prior approval. It's the route that takes a semi-detached rear extension from the standard 3m to a full 6m — and a detached one from 4m to 8m — by consulting the neighbours rather than fighting a full application. On Oakwood's deep 1930s plots it's usually the first question worth asking. Pair it with a hip-to-gable loft conversion, the other scheme this hipped-roof stock was made for, and you've transformed the house without moving an inch.
Recent planning decisions around Oakwood
Extension, loft and basement applications decided in Enfield's Oakwood ward, 23 Sep 2025 to 22 Sep 2026.
The newest decisions in those wards
- ApprovedSep 2026
Lonsdale Drive, EN2
Demolition of existing garage, erection of a front/side extension, alterations to windows on the front and rear elevations, and…
26/02712/HOU · Enfield CouncilHouseholder application
- ApprovedSep 2026
Merryhills Drive, EN2
Garage conversion to a habitable room and single storey rear/side extension.
26/02835/HOU · Enfield CouncilHouseholder application
- RefusedAug 2026
Lakenheath, N14
Part single, part 2-storey front/rear extensions, involving conversion of garage to habitable room, formation of crown roof, increase in…
26/02625/HOU · Enfield CouncilHouseholder application
- ApprovedAug 2026
South Lodge Drive, N14
Single storey rear extension 5.1m deep x 3m high (3m high to eaves).
26/02996/PRH · Enfield CouncilPrior approval, larger home extension
- ApprovedAug 2026
Lonsdale Drive, EN2
Single storey rear extension 6m deep x 4m high (3m high to eaves).
26/02711/PRH · Enfield CouncilPrior approval, larger home extension
- ApprovedAug 2026
Lakeside, EN2
Part single, part 2 storey side/rear extension involving demolition of garage with front porch and steps.
26/02362/HOU · Enfield CouncilHouseholder application
- ApprovedAug 2026
South Lodge Drive, N14
Single storey side and rear extension.(RETROSPECTIVE).
26/01920/HOU · Enfield CouncilHouseholder application
- ApprovedJul 2026
South Lodge Drive, N14
Single storey side/rear extension.
26/02475/HOU · Enfield CouncilHouseholder application
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.
Local knowledge
Oakwood's housing stock — and what works on each
Oakwood barely existed before the Piccadilly line arrived in 1933 — the station is a Charles Holden design, now listed — and the suburb that grew around it is almost entirely of a piece: wide avenues of 1930s hipped-roof semis and detached homes, with Trent Park forming the green northern edge. That consistency is genuinely useful: what works on one Oakwood street tends to work on the next.
The hipped-roof semis along and off Bramley Road and Prince George Avenue. The backbone of Oakwood: bay-fronted semis with side passages and long gardens. Two moves dominate. The hip-to-gable loft with rear dormer (£55,000–£90,000) converts the wasted hip into a proper double bedroom with en-suite. The single-storey rear extension (£45,000–£90,000) — pushed to 6m under prior approval where the garden allows — creates the full-width kitchen-diner these houses never had. Plenty of owners phase both, a year or two apart.
The detached 1930s homes. Salted through the same avenues on wider plots. Permitted development is kinder to detached houses — 4m rear as standard, up to 8m with prior approval — and the plots take double-storey rear extensions (£75,000–£160,000) and wrap-arounds (£70,000–£140,000) without swallowing the garden.
The Trent Park edge. Oakwood's streets run up to Trent Park, and gardens backing onto green space enjoy outlooks most of London would queue for. A garden room or fully glazed rear extension makes the most of them — though addresses close to protected parkland can carry extra constraints, so we check yours before the design gets ambitious.
Every street is different. That's the point.
We design to Oakwood's stock and to what the council demonstrably approves — not to a template. A free site visit tells you what your house can take.
Get my free estimateHonest numbers
What a house extension costs in Oakwood in 2026
These are realistic all-in build ranges for Oakwood — labour and materials to a good standard, excluding VAT, professional fees and kitchen fit-out:
| Extension type | Typical Oakwood cost | On-site time | Usual planning route |
|---|---|---|---|
| Side-return extension | £35,000 – £65,000 | 2–3 months | Often permitted development |
| Single-storey rear | £45,000 – £90,000 | 3–4 months | Often permitted development |
| Kitchen extension (incl. mid-range kitchen) | £55,000 – £110,000 | 3–4 months | Often permitted development |
| Hip-to-gable loft + rear dormer | £55,000 – £90,000 | 6–10 weeks | Usually permitted development |
| Wrap-around extension | £70,000 – £140,000 | 4–6 months | Full application |
| Double-storey rear | £75,000 – £160,000 | 5–7 months | Full application |
| Garage conversion | £18,000 – £35,000 | 4–6 weeks | Usually permitted development |
As a rule of thumb, Oakwood builds at £2,800–£4,200 per square metre — standard North London rates, driven by London labour and the care 1930s houses deserve. Run the maths on a 20m² rear addition at those rates and you land on £60,000–£80,000 of build cost. Spec moves the number more than anything — the same footprint can vary by £20,000 on glazing and kitchen choices alone. Your quote follows the free site visit: fixed, itemised down to the last line, and the total never drifts between signing and settling up.
Permissions, handled
Planning permission in Oakwood — what you need to know
Most Oakwood extensions don't need a full planning application. The permitted development baseline gives a semi 3m of single-storey rear depth and a detached house 4m; take the larger home prior-approval route and those figures rise to 6m and 8m. Loft conversions enjoy a generous volume allowance, which Oakwood's big hipped roofs use to the full.
Where you do need permission: double-storey schemes, wrap-arounds, flats and maisonettes, and houses where previous owners have already spent the permitted development allowance. Once validated, a standard householder application at Enfield typically comes back inside eight weeks.
A note on the station: Oakwood station is listed — but listing protects the station building, not your semi up the road. Most Oakwood streets carry no conservation designation at all; we check your address against the council's conservation map as standard before any design work.
The exceptions: the Highlands conservation area sits inside Oakwood ward on its N21 side, and Trent Park, at the top of Oakwood's streets, is a conservation area with an Enfield Article 4 direction over it, according to planning.data.gov.uk. In either, dormers, side extensions and the 6m prior-approval rear drop out of permitted development.
Which council: Enfield, for every address in Oakwood ward. Next door in Cockfosters the answer depends on the exact address, and our guide to house extensions across North London shows where Enfield ends and Barnet begins.
Party walls: with semis the dominant stock, the Party Wall Act applies to most Oakwood projects — budget £1,000–£2,500 per affected neighbour if surveyors are appointed, and start the conversation early. We serve the notices as part of the job.
Paperwork that pays: where your project proceeds under permitted development, we obtain a Lawful Development Certificate — proof for future solicitors and surveyors that everything was lawful, protecting the value you've added.
How it works
How it works
- Free site visit — we walk your Oakwood semi with you: straight talk on feasibility, budget and the route through planning.
- Design & drawings — full plans and 3D visuals built around your hipped-roof house and the way you want to live in it.
- Planning, handled — we put the whole package into Enfield Council and steer it through to a decision.
- Fixed-price build — our vetted North London crew takes it from slab to sign-off, building control approved, with a clean handover at the end.
Our work
Recent work near Oakwood
For Oakwood owners weighing a big project, our build team's full house transformation in Hadley Wood is worth a look: it took a family home from 120m² to 360m², and it's written up in the Hadley Wood case study. Mention what you have in mind when we visit and we'll talk you through how that job was planned.
Questions, answered
Oakwood extension FAQs
What does an extension cost in Oakwood?
Budget £45,000–£90,000 for a single-storey rear build, £55,000–£90,000 for a hip-to-gable loft and £75,000 upwards for double-storey work, excluding VAT and fees. Oakwood sits on standard North London rates of £2,800–£4,200/m², with fixed, itemised quotes after a free site visit.
Can I extend 6 metres without full planning permission?
On most Oakwood semis, yes — through the larger home prior-approval route, where Enfield consults your neighbours instead of running a full application. Detached houses can reach 8m.
What suits a 1930s hipped-roof semi off Bramley Road best?
The combination this stock was made for: a hip-to-gable loft with rear dormer upstairs, and a rear extension creating an open-plan kitchen-diner downstairs. Done together or phased, they roughly double how big the house lives.
Oakwood station is listed — does that affect my house?
No. The Charles Holden station building is protected; its listing doesn't reach your home. Unless your own street carries a specific designation — which we check against Enfield's conservation map before designing — normal permitted development rights apply.
How quickly does Enfield Council decide?
Around eight weeks for a standard householder application, with the clock starting at validation. Prior-approval cases and lawful development certificates often resolve faster.
Will I need party wall agreements with my neighbours?
If you share a wall — and most Oakwood houses are semis — almost certainly, for both rear extensions and loft conversions. Allow £1,000–£2,500 per affected neighbour where surveyors are appointed. We handle the notices and keep it neighbourly.
What we build in Oakwood
The same team designs, gets planning and builds — one fixed, itemised price whichever route your Oakwood project takes.
Nearby areas we cover
What clients say
Rated 5.0 on Google
“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”
“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.”
“Our wrap-around extension has completely transformed the ground floor. We now have the open plan kitchen and family space we wanted without losing all of the garden. Thanks to everyone involved.”
“Really pleased with the work from The Extension Company. We had our extension done in Hampstead and the whole experience was excellent. Great communication from start to finish, The quality of the finish is excellent and we’re really happy with the result. Would definitely recommend them if you’re thinking about an extension.”
Reviews shown word for word from our Google profile. See 9 more client reviews · Read all 16 reviews on Google
Free site visit
Ready to see what's possible on your street?
Free site visit anywhere in Oakwood, honest feasibility advice and a fixed, itemised price — design, planning and build handled end to end by the Pine Grove team.
020 3051 9430Lines open every day, 9am to 8pmMore of North London
Enfield borough
Cockfosters · Oakwood · Southgate · Winchmore Hill · Palmers Green · Enfield · Edmonton · Hadley Wood
Barnet borough
Barnet · East Barnet · New Barnet · Arkley · Monken Hadley · Hampstead Garden Suburb · Whetstone · Totteridge · Finchley · East Finchley · North Finchley · Friern Barnet · Hendon · Golders Green · Mill Hill · Edgware
Haringey borough
Muswell Hill · Highgate · Crouch End · Hornsey · Wood Green · Tottenham
Camden borough
Hackney borough
Hertfordshire border
Potters Bar · Radlett · Shenley · Elstree & Letchmore Heath · Northaw · Cuffley · Brookmans Park · Borehamwood