Area guide · NW11
House Extensions in Golders Green (NW11)
Planning a house extension in Golders Green? We design, gain consent and build extensions and loft conversions across NW11 and on into NW2 — Edwardian Golders Green, Temple Fortune, Childs Hill and Cricklewood. Single-storey rears in NW11 typically build for £50,000–£110,000, applications go to Barnet Council, and if your house is over the line in the neighbouring Hampstead Garden Suburb, you'll need the Suburb Trust's consent as well — a second layer we handle as standard. Book a free site visit and we'll map the exact route for your address.
Planning in Golders Green
What Barnet Council approves in Golders Green
It pays to know what the council actually passes before committing to a design. The decisions listed on this page are from Barnet's Golders Green ward: the streets north of the town centre, up through Temple Fortune towards Brent Cross, approvals and refusals alike.
On planning.data.gov.uk's map, that ward sits outside the Hampstead Garden Suburb conservation area, and that is why the list reads the way it does. Alongside ordinary householder applications you'll find lawful development certificates for hip-to-gables and dormers, and larger-home prior approvals for 6m rears: routes that are open on these streets and that the Suburb's Article 4 direction closes off across most of the Suburb itself.
Two neighbours are not in the list. Garden Suburb ward's decisions are on our Hampstead Garden Suburb page, and Childs Hill and Cricklewood, which are Barnet wards of their own, are covered in the NW2 section further down.
Recent planning decisions around Golders Green
Extension, loft and basement applications decided in Barnet's Golders Green ward, 23 Sep 2025 to 22 Sep 2026.
The newest decisions in those wards
- RefusedSep 2026
Wentworth Road, NW11
Single storey rear extension following removal of the existing terrace. New front porch
26/3049/192 · Barnet CouncilLawful development certificate
- ApprovedSep 2026
Cranbourne Gardens, NW11
Single storey rear extension with a depth of 6.00m (from the original rear wall), maximum height of 2.90m and an eaves height of 2.90m
26/2943/PNH · Barnet CouncilPrior approval, larger home extension
- ApprovedSep 2026
Sheridan Walk, NW11
Single storey rear extension with 1no. rooflight. Roof extension involving side and rear dormer window
26/3085/192 · Barnet CouncilLawful development certificate
- ApprovedSep 2026
Woodville Gardens, NW11
Roof extension involving hip to gable, rear dormer and 2no. front facing rooflights
26/2624/HSE · Barnet CouncilHouseholder application
- RefusedSep 2026
Woodville Road, NW11
2no. Single storey rear extensions with a proposed depth of 6.00 metres, maximum height of 3.00 metres and eaves height of 3.00 metres.
26/2832/PNH · Barnet CouncilPrior approval, larger home extension
- ApprovedSep 2026
Sneath Avenue, NW11
Roof extension involving hip to gable, rear dormer window, 1no. front facing rooflight and new side windows
26/3090/192 · Barnet CouncilLawful development certificate
- ApprovedSep 2026
Sneath Avenue, NW11
Roof extensions involving hip to gable, rear dormer window and side windows
26/3091/192 · Barnet CouncilLawful development certificate
- RefusedAug 2026
Princes Park Avenue, NW11
Part single, part two storey rear extension following demolition of existing ground floor extension
26/2520/HSE · Barnet CouncilHouseholder application
Look a reference up on the council’s own register: Barnet 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
Golders Green's housing stock — and what works on each
Edwardian Golders Green (1905–1914). The suburb that grew up around the new Underground station in a single decade is a largely Edwardian set piece: arts-and-crafts-influenced houses with wide frontages, generous rooms, proper hallways and good gardens. They take extensions beautifully. A single-storey rear (£50,000–£110,000) replaces the original cramped kitchen and scullery with one big, light room on the garden; a loft conversion (£65,000–£110,000) finds two rooms in the generous roof; the tighter terraced streets suit a side-return (£40,000–£80,000). One warning from experience: these houses punish cheap-looking additions and reward considered ones — detail and materials are where the value lives.
Over the line in Hampstead Garden Suburb. Much of the rest of NW11 is the Suburb, a heavily protected residential area, and the rules genuinely change at its boundary: you need Hampstead Garden Suburb Trust consent on top of Barnet planning permission, most permitted development rights are removed, and materials and details are tightly controlled. None of this stops extensions; it changes how they're designed. The Hampstead Garden Suburb page covers building there, and our guide to the Suburb Trust explains how the two consents run side by side.
Flats, maisonettes and later infill. A meaningful slice of NW11 lives in flats and maisonettes, where permitted development never applies — schemes need full planning plus the freeholder's agreement. The later twentieth-century infill houses threaded between the Edwardian streets follow the standard rules. Either way, we confirm exactly what applies at your address before designing anything.
Every street is different. That's the point.
We design to Golders 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 estimateChilds Hill and Cricklewood (NW2)
South and west of Golders Green, the NW2 postcode is shared by three councils: Barnet, Brent and Camden. They meet at the southern end of Cricklewood Broadway. Houses to the north-east of that point are Barnet's, houses across the Broadway to the west are Brent's, and the streets to the south-east are Camden's. The same postcode can put your drawings on any of three desks, each with its own local plan and its own register.
On the Barnet side, Childs Hill and Cricklewood are Barnet wards of their own, with decisions that are not part of the Golders Green list above. Three of Barnet's conservation areas sit here. Railway Terraces, around Midland Terrace just east of the Broadway, dates from 1998. The Golders Green conservation area, around the station and the town centre, falls mostly in Childs Hill ward. And up on the Heath side, the tiny Hampstead Village (Heath Passage) area is Barnet's now but was first designated by Camden, in 1968. None of them has an Article 4 direction on planning.data.gov.uk, so the conservation-area version of permitted development applies: a small single-storey rear can still qualify, but side extensions, dormers and the larger-home route cannot.
On the Brent side, the Mapesbury conservation area comes right up to the west side of the Broadway, and Brent has an Article 4 direction over parts of it that includes the right to extend the house. On the Camden side, Camden's Article 4 direction on basements, in force since October 2016, covers these streets as it does the rest of the borough, so a basement dig there needs planning permission.
For most NW2 houses outside those areas, a rear extension or a loft follows the national rules whichever council decides it. We confirm the council and any designation for your exact address before a line is drawn.
Honest numbers
What a house extension costs in Golders Green in 2026
Working budgets for Golders Green builds run as follows — labour and materials done well, with VAT, professional fees and kitchen fit-out accounted for separately:
| Extension type | Typical Golders Green cost | On-site time | Usual planning route |
|---|---|---|---|
| Side-return extension | £40,000 – £80,000 | 2–3 months | PD outside the Suburb; full application within |
| Single-storey rear | £50,000 – £110,000 | 3–4 months | PD outside the Suburb; full application within |
| Kitchen extension (incl. mid-range kitchen) | £65,000 – £135,000 | 3–4 months | PD outside the Suburb; full application within |
| Hip-to-gable loft + rear dormer | £65,000 – £110,000 | 6–10 weeks | PD outside the Suburb; full application within |
| Wrap-around extension | £80,000 – £175,000 | 4–6 months | Full application |
| Double-storey rear | £90,000 – £200,000 | 5–7 months | Full application |
| Garage conversion | £20,000 – £45,000 | 4–6 weeks | Usually PD outside the Suburb |
Golders Green is a premium market: expect £3,200–£5,200 per square metre, roughly 15–25% above the North London baseline of £2,800–£4,200. The premium reflects the scale and quality of the stock — and, in the Suburb, the materials and craftsmanship the Trust rightly expects. Following a free site visit we put a fixed figure on it, itemised so you can see where every pound goes — and the figure holds.
Permissions, handled
Planning permission in Golders Green — one postcode, two systems
Outside the Suburb, the standard rules apply. As of right, a semi or terrace can extend 3m to the rear and a detached house 4m; the larger home extension scheme, with prior approval, pushes that to 6m and 8m respectively, and loft conversions enjoy a generous volume allowance. Count on roughly eight weeks for Barnet to turn around a standard householder application, and where a Lawful Development Certificate is the smarter route we'll obtain one so the position is beyond argument.
Inside the Suburb, most permitted development rights are removed, so an extension needs a full planning application to Barnet and consent from the Hampstead Garden Suburb Trust, whose remit covers materials, joinery, rooflines and detail. We design once, to a standard both will accept, and run the two consents in parallel rather than in sequence — that discipline is what keeps Suburb projects on programme.
Party walls: semis and terraces dominate NW11, so the Party Wall Act applies to most projects — budget £1,000–£2,500 per affected neighbour if surveyors are appointed. We serve the notices as part of the job. Our North London guide sets out how Barnet's rules compare with its neighbours', including the Camden edge.
How it works
How it works
- Free site visit — we meet you at the house, establish straight away whether the Suburb boundary or a council line catches you, and lay out feasibility, cost and consent route without varnish.
- Design & drawings — a design pack with 3D visuals matched to your house's character, drawn Suburb-literate where the address demands it.
- Planning, handled — every consent is our problem, not yours: the council application and, where required, the Hampstead Garden Suburb Trust submission, run in parallel to decision.
- Fixed-price build — our seasoned North London team builds it, building control signs it off, and you get the house back clean.
Our work
Recent work near Golders Green
A recent completion from our build team in North London is a full house transformation in Hadley Wood, taking a family home from 120m² to 360m² — details in our Hadley Wood case study. Mention your Golders Green plans at the site visit and we'll talk them through.
Questions, answered
Golders Green extension FAQs
How much should I budget for an extension in Golders Green?
Around £50,000–£110,000 for a single-storey rear, £65,000–£135,000 for a kitchen extension and £65,000–£110,000 for a loft — excluding VAT and fees. NW11 runs 15–25% above the North London baseline, at roughly £3,200–£5,200 per square metre. We quote fixed and itemised after a free site visit.
Is my Golders Green house in the Hampstead Garden Suburb?
Not if it's in Golders Green ward proper: planning.data.gov.uk's map puts the ward outside the Suburb's conservation area. The Suburb starts to the east, and some NW11 addresses near the boundary are inside it, so we check the map for your exact house at the site visit.
I'm in the Hampstead Garden Suburb — can I still extend?
Yes. Extensions are approved in the Suburb regularly; the difference is process, not possibility. You need a planning application to Barnet plus Hampstead Garden Suburb Trust consent, because most permitted development rights are removed — so the design has to be right for both from day one.
Which council decides a house in Cricklewood?
It depends which side of the Broadway you're on. Barnet decides the north-east side, including Childs Hill and the Railway Terraces; Brent decides west of the Broadway; Camden decides the streets to the south-east. All three meet at the southern end of Cricklewood Broadway, so we confirm the council for your address before designing.
What works best on a 1905–1914 Edwardian house here?
A single-storey rear that replaces the original kitchen-and-scullery tangle with one light-filled garden room, and a loft conversion in the generous roof. Both suit the era's proportions — the craft is in detailing them so they look like they were always meant to be there.
Why do Golders Green builds cost more than the Barnet average?
Bigger houses, higher finish expectations, and — in the Suburb — controlled materials and joinery that take real craftsmanship. That's the 15–25% premium. It buys work that belongs on these streets, which is also what protects the value of the house.
What we build in Golders Green
The same team designs, gets planning and builds — one fixed, itemised price whichever route your Golders Green project takes.
- Kitchen extensions in Golders Green
- Side return extensions in Golders Green
- Double-storey & wrap-around in Golders Green
- Loft conversions in Golders Green
- Orangeries in Golders Green
- Garden rooms & offices in Golders Green
Checking the rules for Golders Green first?
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
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