Area guide · N16
House Extensions in Stoke Newington (N16)
Planning a house extension in Stoke Newington? We design, gain planning permission and build extensions and loft conversions across N16, from Church Street to the streets around Clissold Park. Most single-storey rear extensions here cost £50,000–£100,000 to build, applications go through Hackney Council, and the signature local scheme is the glazed side-return extension — Stoke Newington is London's side-return heartland. Invite us round for a free site visit and we'll talk you through what your terrace can take.
Live planning data
What Hackney Council is approving right now
We track every residential planning decision across North London. In the most recent two-week window, Hackney Council approved 10 residential schemes borough-wide — and the types that recur are exactly the ones Stoke Newington's terraces were built for: glazed side-infill extensions reclaiming the alley beside the kitchen, and rear dormers opening up the loft storey. Walk any N16 back street and you'll see the pattern from the garden side — side-returns and dormers, everywhere.
Hackney is among the more design-conscious boroughs we work in: rooflines, glazing proportions and materials all get proper attention, particularly in and around the conservation area. The practical lesson from the approvals flow is simple — schemes that respect the terrace go through; speculative ones get worn down. We design firmly to the first category.
Source: Hackney Council's public decision records. The patterns describe borough-wide approvals, not our portfolio — and every scheme is ultimately judged on its own merits.
Local knowledge
Stoke Newington's housing stock — and what works on each
Church Street and the Clissold Park conservation area. The village heart of Stokey — the independent shops, the park, and some of N16's loveliest Victorian streets — sits inside the Stoke Newington conservation area, where permitted development rights are restricted. Extensions still happen here all the time; they simply go through full applications with conservation-literate design: matched brickwork, carefully proportioned glazing, rooflights over dormers where the roofscape is sensitive. That's a service, not a problem.
The Victorian terrace grid. The rest of N16 is street after street of flat- and bay-fronted Victorian terraces with side alleys — the perfect canvas for the glazed side-return (£40,000–£75,000): steel in, side wall opened, glass roof over, and the galley kitchen becomes a light-flooded kitchen-diner across the full width of the house. Add a rear extension and it becomes a wrap-around (£80,000–£160,000) — the full Stokey kitchen.
The lofts. The other staple is the rear dormer loft conversion (£60,000–£100,000) — a double bedroom and en-suite in the roof, with the dormer hidden from the street. Outside the conservation area, most proceed under permitted development's generous volume allowance.
Flats and maisonettes. A large share of N16's houses are converted into flats. Honesty first: flats and maisonettes have no householder permitted development rights, so any extension needs a full planning application. Done well, they get approved — it just changes the route and the timeline, not the outcome.
Every street is different. That's the point.
We design to Stoke Newington'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 Stoke Newington in 2026
These are realistic all-in build ranges for N16 — labour and materials to a good standard, excluding VAT, professional fees and kitchen fit-out:
| Extension type | Typical Stoke Newington cost | On-site time | Usual planning route |
|---|---|---|---|
| Side-return extension | £40,000 – £75,000 | 2–3 months | Often permitted development |
| Single-storey rear | £50,000 – £100,000 | 3–4 months | Often permitted development |
| Kitchen extension (incl. mid-range kitchen) | £60,000 – £125,000 | 3–4 months | Often permitted development |
| Hip-to-gable loft + rear dormer | £60,000 – £100,000 | 6–10 weeks | Usually permitted development |
| Wrap-around extension | £80,000 – £160,000 | 4–6 months | Full application |
| Double-storey rear | £85,000 – £180,000 | 5–7 months | Full application |
| Garage conversion | £20,000 – £40,000 | 4–6 weeks | Usually permitted development |
Stoke Newington build costs run £3,100–£4,800 per square metre — a 10–15% premium on the wider North London rate of £2,800–£4,200/m². The reasons are practical: tight terrace access (materials often come through the house), period detailing that's worth matching properly, and a local finish expectation that leans high-spec. Note too that inside the conservation area, permitted development rights are restricted — so routes marked "often permitted development" above become full applications there. For a 20m² side-return-and-rear, that translates to a £65,000–£95,000 build. Our pricing works one way: free site visit first, then a fixed, itemised quote whose bottom line doesn't move between signing and final payment.
Permissions, handled
Planning permission in Stoke Newington — what you need to know
Outside the conservation area, the default permitted development allowance is a 3m-deep single-storey rear on terraces and semis, or 4m on detached houses — and prior approval under the larger home scheme can carry those to 6m and 8m. Loft conversions enjoy a generous volume allowance — which is why rear dormers are everywhere in N16.
Inside the conservation area — around Church Street and Clissold Park — permitted development rights are restricted, so schemes that are automatic elsewhere need full applications, and design quality genuinely decides outcomes. Materials, glazing proportions and the roofscape all matter. We design for conservation streets across North London; it's bread and butter.
Timings: count on a Hackney householder decision arriving roughly eight weeks after validation. Flats and maisonettes always need full applications, whatever the postcode.
Party walls: N16 is almost entirely terraced, so the Party Wall Act applies to virtually every extension — typically agreements with both neighbours, budgeting £1,000–£2,500 per neighbour if surveyors are appointed. We serve the notices and manage the process end to end.
Our approach: design to what Hackney demonstrably approves, and back every permitted development scheme with a Lawful Development Certificate — the document that settles any doubt the day a buyer's solicitor asks.
How it works
How it works
- Free site visit — we look round your N16 terrace, hear your plans, and give a straight verdict on feasibility, cost and the planning route — conservation-area check included.
- Design & drawings — a full set of drawings and 3D visuals, designed around the terrace you've got and the kitchen-diner you want.
- Planning, handled — we assemble the application, lodge it with Hackney Council and steer it through to a decision.
- Fixed-price build — our vetted North London team builds, building control signs off, and you get the keys back to a tidy site.
Our work
Recent work near Stoke Newington
Our build team's recent North London projects include 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 when we come round — we'll show you the builds that most resemble your own.
Questions, answered
Stoke Newington extension FAQs
How much does a side-return extension cost in Stoke Newington?
Typically £40,000–£75,000 for the build, or £80,000–£160,000 for a full wrap-around with a new kitchen space — excluding VAT, fees and kitchen units. N16 runs at a 10–15% premium to wider North London rates because of tight access and the high finish the area expects.
Why does everyone in N16 build side-returns?
Because the stock demands it: Victorian terraces with a dead side alley and a narrow kitchen. Glazing over that alley adds usable space exactly where family life happens, without losing any garden. It's the highest-value-per-pound move on a Stokey terrace — which is why side-infills keep recurring in Hackney's approvals.
I'm in the conservation area near Church Street or Clissold Park — can I still extend?
Almost certainly, yes. Conservation status restricts permitted development rights, so you'll need a full application, and design quality matters more — matched brick, considered glazing, a respectful roofline. We handle conservation applications routinely; it adds care and a little time, not a roadblock.
Do I need planning permission for a rear extension in Stoke Newington?
Outside the conservation area, often not — rear extensions to 3m (or 6m with prior approval) and most dormer lofts proceed under permitted development. Inside it, expect a full application. Either way, we confirm your address against the council's conservation map before designing anything.
What is Hackney Council approving at the moment?
In the latest two-week window we tracked, 10 residential schemes were approved borough-wide, with side-infill extensions and rear dormers the recurring types — the two classic Stoke Newington projects. Modest, well-detailed schemes are the ones getting through.
How long will my Stokey extension take, start to finish?
Roughly 4–8 weeks of design, around 8 weeks for a Hackney decision, then 2–4 months on site for a side-return or rear scheme. Party wall agreements with both neighbours — budget £1,000–£2,500 each if surveyors are appointed — run in parallel, so they rarely hold up the start.
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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 Stoke Newington, 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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