Kitchen Extensions Kentish Town

Rear, side return and wraparound kitchen extensions in Kentish Town, the room, the services and the kitchen built as one job.

A kitchen extension in Kentish Town is built for one of two owners. Houses are a small share of NW5: 11% of homes are terraced houses and 2% are semi-detached or detached, so the house job is usually a Victorian terrace, with a side return infill or a rear addition off the back. The other owner has a ground floor flat, in a stock where 87% of homes are flats, and starts with no householder permitted development rights at all.

In Kentish Town, a rear kitchen extension of about 30 square metres typically costs £45,000 to £97,500 excluding VAT, or £60,000 to £100,000 for a side return (indicative London ranges, Resi, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Kentish Town: the structural engineer we appoint designs the foundations and steel, we build the room and fit the kitchen, and a registered electrician certifies the electrics.

Price guide

WorkIndicative London range
Rear kitchen extension, about 30 square metres, ex VAT£45,000 to £97,500
Side return kitchen extension, standard to high specification£60,000 to £100,000
Wraparound kitchen extension, standard to high specification£80,000 to £130,000
Side return build rate, per square metre of new floor£2,400 to £3,200
Kitchen supplied and fitted within the extension£5,000 to £14,000
Structural engineer's fee£950 to £2,500

Indicative London ranges (Resi, MyBuilder and Checkatrade, 2026), not a quotation. Prices checked September 2026. Full breakdown: Extension Cost and Planning Guide.

Quick estimate for Kentish Town

Kentish Town range: choose above

A new steel over a rear opening towards the garden, installed by GS Renovation, with props still carrying the structure above
An opening formed on steel like this is where the house joins a new kitchen extension.

Side return or rear addition on a Kentish Town terrace

On a Kentish Town terrace the choice is between filling the side return, pushing out from the rear wall, or wrapping the two together into one L shaped room. Camden's Home Improvements guidance says a rear extension should stay subordinate to the house in footprint, scale, proportion and detailing, and should leave a reasonably sized garden behind it. On a short garden that second test can set the depth before anything else does, so we look at the garden length first.

Side extensions are covered by the same guidance, which says they should be confined to a single storey, with a taller one possible only in some instances. A single storey glazed infill alongside the back addition is the kind of side return that wording describes. When the plan comes to us we price the steel, the drainage run and the glazing against the depth the designer has drawn, so you can see which element carries the cost before anything is fixed.

Housing in Kentish Town

The Council Tax list puts Kentish Town at about 8,940 homes, 87% flats against 13% houses; 44% went up before 1919, 4% between the wars and 52% after 1945. Since most homes here are flats, only a ground floor flat in Kentish Town with its own garden can extend its kitchen.

Daylight tests and the neighbour on the other side of the wall

The neighbour's window is often the constraint that trims a kitchen extension in Kentish Town. Camden's guidance asks rear extensions to pass the 45 degree and 25 degree tests set out in its Amenity guidance, or to show compliance with the BRE daylight method through a proper daylight test. On a terrace where the next house sits a party wall away, those lines start from the neighbour's nearest rear window, and the height of your wall at the boundary is what they measure.

That is why a side return is often drawn with a low wall at the boundary and a roof rising towards your own house: a mono pitch or a stepped flat roof, with a parapet that has to be flashed carefully. Building on or astride the boundary wall also brings in the Party Wall etc. Act, and the notices are served by you as building owner. We set the wall height out from the approved drawings before the first course, because a wall built too tall no longer matches its consent.

Side returns in and around the Kentish Town Conservation Area

Whether your house sits inside a conservation area changes the paperwork for a Kentish Town side return. Kentish Town Conservation Area was designated in three stages, beginning with Torriano Cottages on 18 June 1985, and Camden's guidance says properties in conservation areas have no permitted development rights for side extensions. National rules say the same for all side extensions on designated land, which need householder planning permission. Inside a conservation area, then, a side return is drawn and consented before any steel is ordered.

For a rear addition, a terraced house that keeps its permitted development rights can extend three metres beyond the original rear wall at single storey, no higher than four metres. Those rights can be removed by a direction or a condition on an earlier consent, so your designer confirms the route for your address. Once a scheme is settled, it sets our programme: steel ordered against the approved drawings, building control visits booked around the pour and the beam, and glazing held until the openings are built and measured.

Roof lights, green roofs and the kitchen fit in Kentish Town

The roof of a Kentish Town kitchen extension carries two of Camden's preferences. Roof lights on a ground floor extension should sit away from the building line or be obscure glazed, to avoid excessive light spillage, which matters where the upper floors are separate flats. On a rear extension Camden prefers a biodiverse green roof with a substrate depth of 100mm over sedum. That substrate is heavy when wet, so the structural engineer we appoint sizes the joists and the deck for it from the start.

Below that roof the kitchen goes in as part of the same programme. We set out the sink and extractor positions before the drainage and ducting are run, so the waste falls to the existing stack and the duct exits where the drawings allow. If a shared drain runs under the new floor, it is usually a public sewer, and building over it needs the water company's agreement first. Units, worktops, tiling and appliances follow once the screed has dried, under one site manager throughout.

  • Party wall process explained, with drawings for your notices
  • Foundations, drainage and slab with the kitchen services cast in
  • New kitchen circuits, with Part P certification from a registered electrician
Service areaKentish Town · NW5
Local authorityCamden Council
Part ofNorth London (Inner London)
Typical homesPost-war council estates and Victorian terraces, mostly flats
Housing stock44% built before 1919, 4% interwar, 52% post-war; 87% flats, 11% terraced, 2% semi-detached or detached
Also covered nearbyCamden Town, Holloway, Hampstead, Highbury and Highgate

VOA Council Tax stock of properties, March 2025, for Kentish Town West and Kentish Town East. Counts rounded by the VOA.

Trusted Kitchen Extensions in Kentish Town

A kitchen extension joins two trades that are often run by different firms: the structure and the kitchen. We run both. The founder, Abdelaaziz Saaid, brings more than thirty years on site, and the same team takes the job from the setting out of the footings to the last cabinet handle, working to the drawings and the consent you already hold. You get a written quotation after a visit, a written programme, and one site manager who answers the phone from start to handover.

  • Boiler flue, soil pipe and gully moved off the rear wall in the right order
  • Rooflights set out against the engineer's steel layout
  • Building control applications and inspections coordinated for you
30+ YearsFounder's experience
Fully Insured5 year guarantee
4.9 / 531 MyBuilder reviews
Building ControlCompliant
Free QuotesNo obligation
Reviews

Rated 4.9 / 5 by our clients

★★★★★ 4.9 average from 31 verified reviews on MyBuilder

★★★★★
George always kept to commitments and arrived on time. He offered helpful suggestions during his initial visit and promptly provided a reasonably…
scomtottIslington, London · via MyBuilder
★★★★★
It's the second time I have hired George and he has been absolutely professional and the work he did resembles perfectly what I had in mind. Being an…
ariabuffadesignerHornsey, London · via MyBuilder
★★★★★
Saaid is the best craftsman I have worked with. He knows what he is doing from the very beginning. He has a great knowledge of construction…
volkan50816Stoke Newington, London · via MyBuilder
Read all 31 reviews

FAQ

Frequently Asked Questions about Kitchen Extensions Kentish Town

Why do kitchen extensions quotes in Kentish Town vary so much?

Kitchen extensions quotes in Kentish Town spread widely because scope, not skill, is what differs. A figure that omits the engineer's design, the Camden Council building control fee or the making good will always undercut one that includes them. Sequence is where cheap quotes cut corners: the shell is made watertight before the old rear wall is opened and the existing kitchen comes out. GS Renovation lists each element for the NW5 address against £45,000 to £97,500 excluding VAT for a rear kitchen extension of about 30 square metres (indicative).

Can a Kentish Town ground floor flat have a kitchen extension?

Yes, but through planning permission rather than permitted development. Householder permitted development rules for extensions apply to houses only, not to flats and maisonettes, so a ground floor flat owner needs full planning permission. In Camden a leaseholder also needs the freeholder's consent and must use a full plans building control application, not a building notice. Once both are in hand, we build to the approved drawings as we would for a house.

How deep can a rear kitchen extension go on a Kentish Town terrace?

Under permitted development a single storey rear extension to a terraced house can go three metres beyond the original rear wall, no more than four metres high. With prior approval and outside designated land that rises to six metres. Beyond those limits it needs planning permission, and Camden's guidance also asks that a reasonably sized garden is kept, which on a short garden can be the tighter limit.

Does a side return in Kentish Town need planning permission?

Inside a conservation area, yes. Camden's guidance says properties in conservation areas have no permitted development rights for side extensions, and national rules require householder planning permission for every side extension on designated land. Outside those areas the permitted development limits for side extensions can apply, unless a direction or condition has removed them, and your designer should confirm them for your address before drawings are finalised.

What are the 45 degree and 25 degree tests in Kentish Town?

They are daylight checks Camden applies to rear extensions, drawn from the neighbour's nearest window to see whether your new wall or roof cuts into their light. Camden's Home Improvements guidance asks rear extensions to pass them, or to show compliance with the BRE method through a daylight test. They can decide the height of a side return wall at the boundary.

Why does Camden prefer a green roof on a kitchen extension?

Camden's Home Improvements guidance prefers biodiverse green roofs with a substrate depth of 100mm on rear extensions over sedum roofs, for wildlife and rainwater. For the build it means a heavier roof. The structural engineer we appoint sizes the joists and deck for the saturated weight, and we detail the upstands, outlets and roof lights to suit.

Where can roof lights go on a Kentish Town kitchen extension?

Away from the building line, or obscure glazed. Camden's guidance says roof lights on the roofs of ground floor extensions should be positioned that way to avoid excessive light spillage, which protects the windows of the flats and bedrooms above. We set the roof light upstands to the positions on the approved drawing so the finished roof matches what was consented.

Do you fit the kitchen as well as build the extension?

Yes. The kitchen fit runs in the same programme as the shell, so the drainage, the extractor duct and the electrical first fix are placed for the layout you have chosen before the walls are plastered. A registered electrician certifies the electrics, and an engineer on the Gas Safe Register connects any gas hob. Units and worktops go in once the screed is dry.

How long does the build take once work starts on site?

The programme is set by the size of the extension, the steel lead time and the kitchen order, so we give you a written programme with the quotation after the site visit. Weather affects the groundworks and the roof, so we build in a margin for those stages and tell you early if anything moves.

Ready to Start Your Kentish Town Project?

Free, no-obligation quote for kitchen extensions in Kentish Town.

We use these details only to respond to your enquiry. See our privacy policy.

Free, no-obligation quote. We reply within 24 hours. Or call 07472 424 226.

Call 07472 424 226Free quote