Area guide · N17 & N15

House Extensions in Tottenham (N17 & N15)

Planning a house extension in Tottenham? We design, gain planning permission and build extensions and loft conversions across N17 and N15, from the Bruce Castle quarter to South Tottenham. Most single-storey rear extensions here cost £40,000–£80,000 to build, applications go through Haringey Council, and the decisions coming through are rear and wrap-around extensions and roof works on Victorian terraces — exactly the stock Tottenham is made of. A free site visit will tell you precisely where your house stands — book one and we'll walk it with you.

Council
London Borough of Haringey
Typical single-storey rear
£40k–£80k
Standard householder decision
~8 weeks
High Road
five conservation areas

Planning in Tottenham

What Haringey Council has approved in Tottenham

Haringey publishes its planning decisions, so Tottenham owners don't have to guess what the council will accept. The list below draws on Haringey's Tottenham wards, from Northumberland Park and White Hart Lane in N17 down to Seven Sisters, St Ann's and South Tottenham in N15, with some N22 addresses on the West Green side.

Two routes turn up again and again. On terraces outside the conservation areas, the larger-home prior approval carries single-storey rear extensions out to 6m, a straightforward route to a big kitchen. Wrap-around infills go in as householder applications instead, because a wrap-around extends beyond both a side wall and the rear wall, which takes it outside permitted development. Either way, well-judged schemes in proportion to the terrace are the ones going through: Haringey rewards design that follows the grain of the street, and that's precisely how we design.

Recent planning decisions around Tottenham

Extension, loft and basement applications decided in Haringey's Tottenham Central, Tottenham Hale, Bruce Castle, Northumberland Park, White Hart Lane, West Green, Seven Sisters, South Tottenham and St Ann's wards, 23 Sep 2025 to 22 Sep 2026.

Decided
296
Approved
264
Refused
32

The newest decisions in those wards

  • ApprovedSep 2026

    Boundary Road, N22

    Erection of a single storey rear wraparound extension.

    HGY/2026/1040 · Haringey CouncilHouseholder application

  • ApprovedSep 2026

    Lealand Road, N15

    Single-storey ‘wrap-around’ infill extension to rear of dwelling house.

    HGY/2026/2131 · Haringey CouncilHouseholder application

  • ApprovedSep 2026

    Daleview Road, N15

    Erection of a single storey extension which extends beyond the rear wall of the original house by 6m in part and 3.1m in part, for which…

    HGY/2026/2346 · Haringey CouncilPrior approval, larger home extension

  • ApprovedSep 2026

    Elm Park Avenue, N15

    Erection of single storey extension which extends beyond the rear wall of the original house by 6m, for which the maximum height would be…

    HGY/2026/2355 · Haringey CouncilPrior approval, larger home extension

  • ApprovedSep 2026

    Elm Park Avenue, N15

    Erection of Type 3 roof extension

    HGY/2026/2013 · Haringey CouncilHouseholder application

  • ApprovedSep 2026

    Elm Park Avenue, N15

    Erection of single storey extension which extends beyond the rear wall of the original house by 6m, for which the maximum height would be…

    HGY/2026/2276 · Haringey CouncilPrior approval, larger home extension

  • ApprovedSep 2026

    St Anns Road, N15

    Erection of single storey side infill extension, formation of dormer window and insertion of 4 nos. rooflights (3no. front facing and 1no…

    HGY/2026/1895 · Haringey CouncilHouseholder application

  • ApprovedSep 2026

    Yarmouth Crescent, N17

    Erection of a single storey rear extension.

    HGY/2026/2191 · Haringey CouncilHouseholder application

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

Tottenham's housing stock — and what works on each

Tottenham is Victorian terrace country through and through, and build costs run about 10% below the North London average.

The Victorian terrace streets (N17). Street after street of two-storey terraces with rear additions and side alleys. The classic moves: a side-return extension (£32,000–£58,000) to turn the narrow galley kitchen into a full-width kitchen-diner; a single-storey rear extension (£40,000–£80,000); or both together as a wrap-around (£63,000–£125,000). Party wall agreements with both neighbours are usually needed; we manage that process.

The High Road corridor and Bruce Castle quarter. Tottenham's historic spine is protected as five conservation areas that Haringey groups as the Tottenham High Road Historic Corridor: North Tottenham, Scotland Green, Bruce Grove, Tottenham Green and Seven Sisters/Page Green. Bruce Castle, the Tudor manor house that's now the local museum, has a conservation area of its own with All Hallows church. Around here, design and materials get more attention, and permitted development rights are restricted in conservation areas — so we check your address against the council's conservation map before any design work starts.

Tower Gardens and Peabody Cottages. In White Hart Lane ward, Tower Gardens is a London County Council cottage estate from the early twentieth century, and Peabody Cottages nearby was built by the Peabody Trust. Both are conservation areas, and both have Article 4 directions that since December 2020 have covered the street elevations of their houses: extensions and roof alterations facing the street, porches, outbuildings, hard surfaces, chimneys and front walls, gates and fences all need planning permission there. Work at the back is judged against the conservation-area rules, so a rear extension on either estate is designed around the original cottage from the first sketch.

South Tottenham (N15). Tighter terrace grids and a high share of houses converted into flats and maisonettes. Honesty first: flats don't have householder permitted development rights, so extending one means a full planning application. It's done regularly — it just needs the right drawings and a properly argued case.

The stadium quarter. The regeneration around the stadium has brought new homes, new spending and a rising tide for the whole of N17. For homeowners the practical effect is confidence: extending in Tottenham means investing in an area on a visible upswing — and your householder application is still judged on its own merits, regeneration or not.

Every street is different. That's the point.

We design to Tottenham's stock and to what the council demonstrably approves — not to a template. A free site visit tells you what your house can take.

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Honest numbers

What a house extension costs in Tottenham in 2026

These are realistic all-in build ranges for Tottenham — labour and materials to a good standard, excluding VAT, professional fees and kitchen fit-out:

Extension typeTypical Tottenham costOn-site timeUsual planning route
Side-return extension£32,000 – £58,0002–3 monthsOften permitted development
Single-storey rear£40,000 – £80,0003–4 monthsOften permitted development
Kitchen extension (incl. mid-range kitchen)£50,000 – £100,0003–4 monthsOften permitted development
Hip-to-gable loft + rear dormer£50,000 – £80,0006–10 weeksUsually permitted development
Wrap-around extension£63,000 – £125,0004–6 monthsFull application
Double-storey rear£68,000 – £145,0005–7 monthsFull application
Garage conversion£16,000 – £32,0004–6 weeksUsually permitted development

As a rule of thumb, Tottenham build costs run £2,500–£3,800 per square metre — roughly 10% below the wider North London rate of £2,800–£4,200/m². Costed at those rates, a 20m² rear addition comes to £50,000–£75,000 of build. Following the free site visit we issue a single fixed price, itemised line by line, and we hold to it: the contract figure and the final figure are the same figure.

Permissions, handled

Planning permission in Tottenham — what you need to know

Most Tottenham extensions don't need a full planning application. Terraces and semis can run a single-storey rear extension 3m deep under permitted development — detached houses get 4m — and the larger home scheme with prior approval pushes those depths to 6m and 8m. Loft conversions enjoy a generous volume allowance — dormer lofts are routine on these terraces.

Where you do need permission: wrap-arounds and double-storey schemes, all flats and maisonettes (a big slice of N15), homes where PD rights have already been used up, and anywhere inside a conservation area — the five along the High Road, Bruce Castle and All Hallows, Tower Gardens, Peabody Cottages and others — where permitted development rights are restricted. Our North London extensions overview shows how Haringey's rules compare across the boroughs. Standard householder applications at Haringey typically take around eight weeks to come back.

Party walls: Tottenham is overwhelmingly terraced, so the Party Wall Act applies to nearly every project — budget £1,000–£2,500 per affected neighbour if surveyors are appointed, and start the conversation early. We prepare the notices and keep neighbours onside; it's part of the job.

Our approach: we design to what Haringey demonstrably approves — modest, well-proportioned schemes that respect the terrace. And when a Lawful Development Certificate is the wiser path, we secure one: the paperwork that means no awkward questions when you come to sell.

How it works

How it works

  1. Free site visit — we walk your Tottenham terrace, listen hard, and tell you honestly what's feasible, what it'll cost and which planning route makes sense.
  2. Design & drawings — drawings worked up in detail with 3D visuals, fitted to your house and the way your family fills it.
  3. Planning, handled — the application goes into Haringey Council fully prepared, and we manage it through to the decision.
  4. Fixed-price build — our vetted North London team does the building, secures the building control certificate and hands back a clean site.

Our work

Recent work near Tottenham

Tottenham terraces are a different scale, but one recent North London job gives a sense of the build team's range: a full house transformation in Hadley Wood that took a family home from 120m² to 360m². Details and photos are in the Hadley Wood case study.

Questions, answered

Tottenham extension FAQs

How much does a house extension cost in Tottenham?

Around £40,000–£80,000 for a single-storey rear extension build, £32,000–£58,000 for a side-return and £50,000–£80,000 for a hip-to-gable loft — excluding VAT and fees. N17 and N15 build rates run £2,500–£3,800/m², roughly 10% below the North London average.

What has Haringey Council approved in Tottenham recently?

The newest decisions across Haringey's Tottenham wards are listed further up this page, each with its council reference. They're mostly rear and wrap-around extensions and roof works on terraces, with the larger-home prior approval used for deeper rear extensions outside the conservation areas. Modest, well-proportioned terrace schemes are the ones going through.

What's the best extension for a Tottenham Victorian terrace?

The side-return is the classic: it reclaims the dead alley beside the kitchen for a full-width kitchen-diner. Pair it with a rear extension as a wrap-around if you need serious space, or add a dormer loft for extra bedrooms. We'll tell you which combination your plot and budget support at the site visit.

I'm near the High Road — will conservation rules affect my plans?

Possibly. Five conservation areas run along the High Road, and in conservation areas permitted development rights are restricted — meaning schemes that are automatic elsewhere need a full application there. On the Tower Gardens and Peabody Cottages estates, Article 4 directions also bring street-facing changes into planning. We check your address against the council's conservation map before any design work starts, so there are no surprises.

My Tottenham house is split into flats — can I still extend?

Yes, but the route differs: flats and maisonettes have no householder permitted development rights, so every extension needs a full planning application. Plenty succeed; it just needs the right drawings and a properly argued case.

How long will the whole process take?

Typically 4–8 weeks for design and drawings, around 8 weeks for a Haringey householder decision, then 2–4 months on site for a single-storey scheme. Party wall notices — most Tottenham projects need them, at £1,000–£2,500 per neighbour if surveyors are appointed — run in parallel, so they rarely delay the start.

Nearby areas we cover

What clients say

Rated 5.0 on Google

5.0 from 16 Google reviews
“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.”
Harry PopeSingle-storey rear extension, Crouch End · Google review · June 2026
“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”
Ceri JenkinsBarnet · Google review · September 2026
“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.”
Billie CampbellHip-to-gable & rear dormer loft conversion, Barnet · Google review · June 2026
“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.”
Daniel LangleyLoft conversion · Google review · September 2026
“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.”
Lesley ClarkWrap-around extension · Google review · September 2026
“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.”
Alban PershqefaExtension, Hampstead · Google review · August 2026

Reviews shown word for word from our Google profile. See 9 more client reviews · Read all 16 reviews on Google

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