Area guide · N22
House Extensions in Wood Green (N22)
Planning a house extension in Wood Green? We design, gain planning permission and build extensions and loft conversions across N22 — from Noel Park's distinctive Victorian cottages to the avenues running up towards Alexandra Park. Most single-storey rear extensions here cost £43,000–£90,000 to build — the best value in our patch — applications go to Haringey Council, and the latest local approval is an instructive one: a flat winning full permission for a side and rear dormer extension with a roof terrace. One free site visit settles it — we'll tell you what your address can genuinely accommodate.
Live planning data
What Haringey Council is actually approving in Wood Green right now
Our tracker captures every residential planning decision in North London — so instead of crossing your fingers, you can read what Haringey actually granted. From the most recent decision period, this is a real N22 scheme the council approved:
- Flat A, 298 Alexandra Park Road, N22 — side and rear dormer extension with a rear roof terrace (approved)
Zoom out to the whole borough and Haringey's tally for that two-week window was 32 residential approvals — a pipeline Wood Green owners are firmly part of.
The Alexandra Park Road decision is a small case study in itself. It's a flat — and flats have no permitted development rights, so every element needed a full application. It got one, dormers and roof terrace included. Two lessons for N22: flat owners can extend, and roof terraces — usually the first thing people assume will be refused — are approvable when overlooking and neighbour amenity are designed for from the start.
The case above is on Haringey Council's public planning record. It isn't a project of ours; it shows what the borough has recently granted, and no outcome is guaranteed — each application turns on its own detail.
Local knowledge
Wood Green's housing stock — and what works on each
Wood Green has a more varied housing mix than its hill-top neighbours — and that variety is exactly where the value is.
Noel Park. A planned Victorian workers' estate and one of N22's treasures — and a conservation area where permitted development rights are restricted. The cottages are modest, so a well-designed rear addition makes a disproportionate difference to how the house lives — but expect a full application and detailing that respects the estate's distinctive character. We treat Noel Park work as conservation work, because it is.
The Victorian terraces towards Alexandra Park. The classic N22 family stock — the Alexandra Park Road approval sits on this side. The side-return extension (£33,000–£65,000), single-storey rear (£43,000–£90,000) and loft conversion with rear dormer (£52,000–£90,000) are the proven moves, alone or combined.
Post-war infill and ex-local-authority stock. Wood Green has more twentieth-century housing than Crouch End or Muswell Hill — often with garages (conversion: £17,000–£35,000) and squarer plots that take simple, efficient rear extensions. Pound for pound, some of the best value-add projects we build anywhere.
Flats and maisonettes. A big slice of N22. No permitted development rights, so it's a full application every time — plus freeholder consent where the property is leasehold. The recent approval shows it's a path, not a wall.
Every street is different. That's the point.
We design to Wood Green'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 Wood Green in 2026
Wood Green is the gentlest market in our patch — North London baseline costs, often a touch under. The figures here are realistic, all-in build costs — decent-standard labour and materials, before VAT, professional fees and the kitchen fit-out:
| Extension type | Typical Wood Green cost | On-site time | Usual planning route |
|---|---|---|---|
| Side-return extension | £33,000 – £65,000 | 2–3 months | Often permitted development |
| Single-storey rear | £43,000 – £90,000 | 3–4 months | Often permitted development |
| Kitchen extension (incl. mid-range kitchen) | £52,000 – £110,000 | 3–4 months | Often permitted development |
| Loft conversion + rear dormer | £52,000 – £90,000 | 6–10 weeks | Usually permitted development |
| Wrap-around extension | £65,000 – £140,000 | 4–6 months | Full application |
| Double-storey rear | £70,000 – £160,000 | 5–7 months | Full application |
| Garage conversion | £17,000 – £35,000 | 4–6 weeks | Usually permitted development |
Wood Green builds come in at £2,700–£4,200 per square metre, at or just beneath the £2,800–£4,200 North London baseline. Run the per-metre arithmetic and a 20m² rear spans £54,000–£84,000, with most real-world N22 schemes settling in the lower half of that band. And because build costs here are the lowest in our patch while family space still commands a premium, the extend-versus-move maths leans further towards extending in N22 than almost anywhere we work. Post-visit, you'll have one fixed, itemised quote in hand — and the figure stays put from contract to completion.
Permissions, handled
Planning permission in Wood Green — what you need to know
For most N22 houses, permitted development is the starting point. The standard allowance lets a semi or terrace add a 3m single-storey rear (a detached house, 4m) with no full application — and 6m/8m versions open up under the larger home extension scheme, subject to prior approval. Lofts get a generous volume allowance on top.
Noel Park is the exception. As a conservation area, permitted development rights are restricted — schemes that are PD elsewhere in Wood Green need full permission here, and the design will be judged against the estate's planned Victorian character. Elsewhere in N22, we check your address against the council's conservation map as part of the free consultation.
Flats and maisonettes have no permitted development rights at all — every project needs a full application, as the Alexandra Park Road approval shows is perfectly achievable.
Standard householder applications clear Haringey in approximately eight weeks. Terraced streets mean party walls: budget £1,000–£2,500 per affected neighbour if surveyors are appointed — we prepare the notices as part of the job. Wherever your project proceeds under permitted development, we recommend a Lawful Development Certificate, so the works are beyond challenge when you sell.
How it works
How it works
- Free site visit — we visit your N22 home — Noel Park cottage, Victorian terrace or post-war house — and give a frank assessment of feasibility, cost and the planning route.
- Design & drawings — well-resolved plans and 3D imagery, drawn for your house and the way you want to live in it.
- Planning, handled — we take care of the entire Haringey Council submission and manage it through to determination.
- Fixed-price build — delivered by our vetted North London team with building control certification and a clean, careful handover.
Our work
Recent work near Wood Green
Recent North London work from our builders includes a full house transformation taking a family home from 120m² to 360m², a 55m² garden room with kitchen and bathroom, and an Edwardian conversion in Finchley. Ask at the site visit and we'll line up the examples that sit closest to your project.
Questions, answered
Wood Green extension FAQs
Can I extend a house in Noel Park?
Yes — with a full planning application. The conservation area restricts permitted development rights, and the estate's planned Victorian character sets the design bar, but sympathetic rear additions are achievable. We design Noel Park schemes to conservation standards from the first sketch.
I own a flat in N22 — can I add a dormer or extension?
Flats have no permitted development rights, so it's a full application plus your freeholder's consent if leasehold. The latest local approval — dormers and a roof terrace at Flat A, 298 Alexandra Park Road — shows Haringey grants well-designed flat schemes.
What does a rear extension cost in Wood Green?
£43,000–£90,000 for the build depending on size, glazing and spec — the best value in our patch, at or just under baseline North London rates of £2,800–£4,200/m².
Is extending worth it in Wood Green, or should we just move?
Extending wins more often here than anywhere we work: the lowest build costs in our patch, strong demand for family space, and none of the stamp duty, fees and upheaval of moving. We'll give you straight numbers for your house at the site visit so you can make the call properly.
What's the wait for a Haringey decision?
Around eight weeks for a standard householder application once validated — and the borough approved 32 residential schemes in the latest two-week window, so the pipeline is moving. Full applications for flats run to the same clock.
Do roof terraces get approved in N22?
They can be — the latest local approval included one. Overlooking and neighbour amenity are the make-or-break issues, so screening, positioning and sightlines need designing in from day one rather than bolting on later.
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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.…” read the full review
“Really impressed with the entire project. The side extension and conservatory have been finished to a very high standard and the team made the process straight forward and stress-free. It’s transformed the space and added so much value, would definitely recommend.”
“Brilliant experience with the extension company, transparent from the word go. Completed a double story extension for me and I couldn’t be more pleased. Thank you”
“I got the extension company to do a bathroom refurb for us a January they done a great job they managed to fit in a large shower as well as a bath”
Reviews shown word for word from our Google profile. Read all 8 reviews on Google
Free site visit
Ready to see what's possible on your street?
Free site visit anywhere in Wood Green, honest feasibility advice and a fixed, itemised price — design, planning and build handled end to end by the Pine Grove team.
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