House Extensions Palmers Green
Single storey rear and double storey extensions in Palmers Green, planning, structure and build under one contract.
- Rated 4.9 from 31 reviews on MyBuilder
- Single-storey rear extension from £40,000
- Free site survey, itemised quote
GS Renovation plans and builds extensions on the Victorian and Edwardian terraces of Palmers Green, from rear kitchen extensions to full side-return and wrap-around builds. We handle the foundations, steelwork, roof and full fit-out as one accountable project from first dig to final coat.
In Palmers Green, a single-storey rear extension typically starts from £40,000, or £2,000 to £2,800 per m² (indicative London ranges, Architecture for London, Resi, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Palmers Green: the structural engineer we appoint designs the structure, we build it, and building control signs it off.
Price guide
| Work | Indicative London range |
|---|---|
| Single-storey rear extension | from £40,000 |
| Rear extension, per m² | £2,000 to £2,800 |
| Side return, per m² | £2,400 to £3,200 |
| Wraparound, per m² | £2,400 to £3,200 |
| Double storey, per m² | £1,800 to £2,600 |
| Basement extension | see the basement page |
Indicative London ranges (Architecture for London, Resi, MyBuilder and Checkatrade, 2026), not a quotation. Prices checked September 2026. Full breakdown: Extension Costs & Planning.
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Palmers Green range: choose above
Side-return extensions in Palmers Green
Many Palmers Green terraces have a rear closet wing and a narrow side return running alongside it, a strip of ground that is usually wasted. Filling that side return, often combined with a rear extension, is the classic way to turn a dark galley kitchen into a wide, open-plan kitchen-diner. We dig and pour the foundations, install the steel beams the new opening needs and tie the roof neatly back into the existing closet wing.
These builds run close to the boundary shared with the neighbour, so the Party Wall etc. Act almost always applies, whether from excavating near the line or building off the party wall. You serve the notices early, as building owner, using the drawings we supply, and because the plots are tight we plan access, skip placement and materials storage carefully to keep the N13 street and your neighbours onside throughout the build.
Housing in Palmers Green
Roughly 7,040 dwellings sit on the valuation list for Palmers Green. 55% are houses and 45% flats, and by age 44% predate 1919, 35% are interwar and 20% post-war. Terraced houses make up 39% of homes here, and a rear extension on a terrace in Palmers Green digs foundations close to both neighbours, so notices to both are normal.
Air bricks and the Mayor's levy on Palmers Green extensions
A rear extension on a house built before 1919, as 44% of Palmers Green homes were, can bury the air bricks that ventilate the suspended timber floor. Block them and the void goes damp, and the joist ends can rot unseen. The answer is to carry the ventilation through: ducts under the new slab to fresh air bricks in the extension wall, drawn before the foundations are dug. Ask to see every existing air brick marked on the survey drawing, and check the ones at the front stay clear too, since the floor depends on air crossing from one side to the other.
Larger additions carry a charge that owners often miss. Under the Mayor of London's MCIL2 charging schedule, Enfield is in Band 2, and a household extension big enough to fall within the levy needs its exemption claimed before work begins. The commencement notice has the same deadline. Starting before the claim is made loses the exemption, and a missing commencement notice can bring a penalty. So a Palmers Green extension of real size has its levy forms settled at the same time as building control approval, not on the morning the digger arrives.
Permitted development or planning in N13
A single-storey rear extension on a Palmers Green terrace may fall under permitted development, but that is never a given. Depth limits, boundary distances, the height of the roof, previous extensions and, in a conservation area, any Article 4 direction all decide it. We assess your specific N13 house first, then either confirm the permitted development route or work with your designer on a full planning application to Enfield Council.
Double-storey and wrap-around extensions, or anything altering the front elevation, are far more likely to need planning permission. Whichever route applies, the structural work still needs building regulations approval and building control inspections in their own right. We keep planning and building control as two separate tracks, so you always know which approval covers which part of the job and nothing gets confused between them.
Kitchen extensions in Palmers Green
71% of the houses in Palmers Green are terraced. On a terrace the kitchen extension is built out from the back, into the side return where the house has one or across the full rear width, and a steel beam takes the old back wall so the kitchen and the new room become one space. The fit-out is priced on its own page, kitchen renovation in Palmers Green; the build figures are in the table above.
Double storey extensions in Palmers Green
Under permitted development a two-storey rear extension can go no more than 3 metres beyond the original rear wall and must stay at least 7 metres from the rear boundary, and in a conservation area it is not permitted development at all. Many gardens are too short for the 7 metre rule, so a double storey extension in Palmers Green often needs planning permission from Enfield Council. On the 39% of homes that are terraced, the neighbours' windows usually decide the depth. Planning Data gives the Trent Park conservation area in Enfield a designation date of 1973 (council source). Our double storey extension page explains the build, at £1,800 to £2,600 per m² across both floors.
- First fix and second fix plumbing and electrics throughout
- Building control inspections at foundation, damp course and steel stages
- Drainage diversion and build-over agreements with the water authority
VOA Council Tax stock of properties, March 2025, for Palmers Green East and Palmers Green West. Counts rounded by the VOA.
Trusted House Extensions in Palmers Green
Palmers Green homeowners choose GS Renovation because we manage the whole extension under one roof, foundations, steel, roof and fit-out, and we know how N13 terraces are put together. We advise honestly on permitted development versus a planning application, explain the party wall process and give you the drawings for your notices, and deliver a build that matches the character of your Victorian or Edwardian home. Our founder's 30+ years on the tools, one team, start to finish.
- Registered in England, Companies House no. 14611254
- Programme planned around party wall notice periods before excavation near a neighbour
- Insulation and thermal detailing to current regulations
Built a new extension at rear of property. Laid foundations, drainage, raised floor, new roof and completed all fixtures and interior decoration…
We loved working with George and Ibrahim and would highly recommend them. They have done splendid job on our new kitchen refurb which including new…
I am very happy to recommend George after he completed the work on my 2 bathrooms. He worked very hard to make sure everything was completed and even…
FAQ
Frequently Asked Questions about House Extensions Palmers Green
How do you price house extensions in Palmers Green?
The method for pricing house extensions in Palmers Green is deliberately dull: measure, scope, itemise, then compare with £2,000 to £2,800 per m² for a rear extension (indicative). Nothing is quoted over the phone, because a blind figure changes later. GS Renovation allows for the late Victorian or Edwardian construction at N13 and prices permitted development or a planning application to Enfield Council as its own line.
Will my Palmers Green rear extension need planning permission?
A modest single-storey rear extension may be permitted development, but depth, height and boundary distance can push it into needing a full planning application to Enfield Council, and in a conservation area an Article 4 direction can remove the right, so the council's Article 4 list is checked. Double-storey and wrap-around builds usually need permission. We assess your N13 house first, then take the correct route. Either way the structure needs separate building regulations sign-off.
Where does the drainage go under a Palmers Green side return extension?
Often straight under it, because the kitchen waste and rainwater pipes of a terrace tend to run along the side return to the drain at the back. A survey maps those runs first, and inspection chambers under the new floor get sealed covers or are moved. If a public sewer crosses the footprint, the water company must consent before anyone builds over it. Enfield building control then checks the Part H falls.
How do we stop a Palmers Green side return extension making the middle room dark?
With light from above. Filling the side return removes the window that lit the middle room, so the new roof usually carries rooflights or a glazed strip along the party wall side, dropping daylight deep into the plan. The glazing area is balanced against Part L. Where the old middle room wall comes out, steel carries the house above.
What foundations does a Palmers Green extension need?
Whatever the ground and neighbours dictate, confirmed once the trench is open. A trial pit beside the existing footings shows how deep the originals go and what they are made of, since new foundations are generally taken at least that deep. Next to the neighbour's wall, digging within 3 metres to below their foundations needs one month's party wall notice. Building control inspects the trench before concrete.
Can I keep using my kitchen while a Palmers Green rear extension is built?
For the early stages, usually yes. Foundations, drainage and the shell go up outside while the old kitchen keeps working behind the existing rear wall. The break comes when that wall is removed and the beam goes in, and from then until the new kitchen is connected you will need a temporary set up elsewhere. Ordering units to arrive as the shell is finished shortens that gap.
Do Enfield's Article 4 directions affect a rear extension in Palmers Green?
Only where the address sits inside an area a direction covers. Planning Data records Enfield directions tied to named conservation areas, such as Bush Hill Park under a 2003 direction and Trent Park under a 2006 direction. Inside any conservation area, permitted development is already narrower, with side extensions and rear extensions of more than one storey needing an application. The borough-wide direction on houses in multiple occupation concerns a change of use, not extensions. Check the Palmers Green address first, then read the exact wording of any direction, because each one removes specific rights.
Who owns the garden behind a Palmers Green house that has been split into flats?
Whoever the lease plan says. The garden may belong to the ground floor flat, be shared by both flats, or be kept by the freeholder, and each answer changes who has to agree to an extension. With 45% of Palmers Green homes being flats, check the plan attached to each lease and the freehold title before any design work. Building over a shared garden without written agreement from everyone involved invites a dispute that stops the job.
What record of the neighbour's property is needed before a Palmers Green extension starts?
A dated photographic record of their rear wall, garden wall, paving and any cracks in the rooms beside the work. Where party wall notices lead to surveyors, that schedule of condition forms part of the award. Where the neighbour consents without surveyors, make the record anyway and send them a copy. In a terrace, and 39% of Palmers Green homes are terraced houses, there is a neighbour on each side, and a hairline crack found later is otherwise one word against another.
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