House Extensions Woodford

Single storey rear and double storey extensions in Woodford, planning, structure and build under one contract.

GS Renovation plans and builds house extensions across Woodford, working on the interwar semis and terraces of IG8. We handle foundations, steelwork, roofing and full fit-out, giving these houses the extra kitchen, family or bedroom space modern life needs.

In Woodford, 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 Woodford: the structural engineer we appoint designs the structure, we build it, and building control signs it off.

Price guide

WorkIndicative London range
Single-storey rear extensionfrom £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 extensionsee 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.

Quick estimate for Woodford

Woodford range: choose above

A rear extension under construction by GS Renovation, with cavity blockwork built up and the damp proof course laid
Blockwork to damp proof course level, with the membrane dressed over before the next lift goes on.

Rear and wrap-around extensions in Woodford

Many of Woodford's interwar semis have good rear gardens, which suits single storey rear kitchen extensions and wrap-around extensions that pull the kitchen out into a light open-plan space. We dig and pour proper foundations, allowing for any tree roots common near Epping Forest and the leafier IG8 roads, then build up in cavity blockwork to match the character of the house.

Where the extension opens into the existing rooms, a steel beam sized by a structural engineer carries the load and is signed off by building control. We manage the roof, whether a warm flat roof with rooflights or a pitched tie-in, along with the drainage, glazing and internal finishes, so the new space feels part of the original home rather than bolted on.

Housing in Woodford

Woodford has around 14,890 homes on the Council Tax list: 47% post-war, 32% interwar and 21% predate 1919, with 39% flats and 61% houses. 25% of homes here are terraced; a rear extension on a terrace in Woodford digs foundations close to both neighbours, so notices to both are normal.

Extending a house in the Woodford Green and Woodford Wells conservation areas

In Woodford, the Woodford Green Conservation Area and the Woodford Wells Conservation Area were both designated in 1970, and an extension to a house inside either starts with fewer shortcuts. A side extension, or a rear one of more than one storey, needs planning permission there, while a single storey rear extension within the usual limits can still be permitted development unless a direction removes that right. Redbridge's planning fast track is not available for sites in a conservation area, and the standard duty planner service is closed to conservation area addresses. The advanced duty planner service is open to them, and it gives a written advice statement. For a Woodford extension, get that statement on a sketch scheme before full drawings are commissioned, since it tells you early whether the size and position are in the right territory.

Redbridge's Local Plan supports householder extensions that are subordinate to the existing building in size, scale or height. On an interwar Woodford semi with a hipped roof, that points towards a side extension set down from the main ridge and set back from the front wall, rather than one that squares off the hip at full height. Trees are the next constraint near Epping Forest. Every tree in a Redbridge conservation area with a trunk over 75mm in diameter is automatically protected, so roots near the footprint shape the foundation design, and the foundations or excavations inspection is where building control sees what the trench found.

Planning and party walls in Woodford

Some extensions on Woodford semis fall under permitted development, but many need a full planning application to Redbridge Council, and the two must never be confused. Size, height, how close you build to a boundary, and whether the property sits in a conservation area or is otherwise restricted all decide which route applies. We assess your specific house and advise honestly before any drawings are finalised.

Side and rear extensions on a semi almost always raise party wall matters, because you are building up to, or excavating near, the boundary you share with next door. You serve notice in good time as building owner, and we prepare the drawings and information a party wall surveyor needs. Whichever consent route applies, all the structural work is built to building regulations and inspected by building control.

Kitchen extensions in Woodford

56% of the houses in Woodford are semi-detached or detached, which usually leaves room for a kitchen extension across the full rear width, with a steel beam over the opening into the house. The fit-out is priced on its own page, kitchen renovation in Woodford; the build figures are in the table above.

Side return extensions in Woodford

25% of homes in Woodford are terraced houses and 21% of all homes were built before 1919; side returns are found on the older terraces, beside the back addition. A side extension is not permitted development in a conservation area, and elsewhere is limited to one storey, 4 metres high and half the house's width, so many go to Redbridge Council as an application. Our side return extension page covers the build in detail, with build rates of £2,400 to £3,200 per m².

Double storey extensions in Woodford

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 Woodford often needs planning permission from Redbridge Council. With 34% of homes here semi-detached or detached, the side of the house is often an option too. Woodford Green Conservation Area and Woodford Wells Conservation Area were designated in 1970 (council source). Our double storey extension page explains the build, at £1,800 to £2,600 per m² across both floors.

  • Brickwork and mortar matched to the existing elevation
  • Trial holes to set foundation depth near drains and trees
  • Roof works and structural alterations at roof level
Service areaWoodford · IG8 and E18
Local authorityRedbridge Council
Part ofEast London (Outer London)
Typical homesInterwar semis, terraces and post-war flats
Housing stock21% built before 1919, 32% interwar, 47% post-war; 39% flats, 25% terraced, 34% semi-detached or detached, 2% bungalows
Also covered nearbyWalthamstow, Wanstead, Leytonstone, Leyton and Loughton

VOA Council Tax stock of properties, March 2025, for Woodford Wells, Woodford Green, Woodford Bridge and South Woodford High Road. Counts rounded by the VOA.

Why Choose GS Renovation in Woodford

Woodford homeowners choose GS Renovation because we manage the whole extension under one roof, from foundations and steel to the final decoration. We know the interwar construction of IG8, the party wall duties on semis and how Redbridge Council handles planning. With our founder's 30+ years on the tools, you get one accountable team and a clean, buildable result.

  • Paperwork and certificates handed over for when you sell
  • Brick and mortar matched to the existing elevation
  • Programme planned around party wall notice periods before excavation near a neighbour

Reviewed jobs near Woodford

1 MyBuilder review from Woodford Green, with each customer's own job title:

  • New en-suite, Woodford Green, 25 Mar 2018 (5 out of 5)

Read all 31 on our reviews page.

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Reviews

Rated 4.9 / 5 by our clients

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

★★★★★
Built a new extension at rear of property. Laid foundations, drainage, raised floor, new roof and completed all fixtures and interior decoration…
Customer of GSrenovationvia MyBuilder
★★★★★
My husband and I are extremely pleased with the work. The standard of the work is outstanding and Saiid has a great eye for detail and will not leave…
jessbeanWoodford Green · via MyBuilder
★★★★★
George was very friendly and helpful from start to finish. He worked really hard to ensure our kitchen was installed to a high standard and was…
sophie35636Wanstead, London · via MyBuilder
Read all 31 reviews

FAQ

Frequently Asked Questions about House Extensions Woodford

What drives the cost of house extensions in a Woodford home?

Scope drives the price of house extensions in Woodford first, condition second and access third, inside £2,000 to £2,800 per m² for a rear extension (indicative). Scope is set by the regulations as much as the design: the work needs permitted development or a planning application to Redbridge Council. GS Renovation shows that element separately, and the IG8 survey establishes all three before a figure is committed.

Will my Woodford extension need planning permission or is it permitted development?

Many single storey rear extensions on Woodford semis are permitted development, but larger, two storey, or boundary-close projects, or homes in restricted areas, need a full planning application to Redbridge Council. We assess your specific house first. Either way, the structural work is built to building regulations and signed off by building control.

How do trees near Epping Forest affect the foundations of my Woodford extension?

They can make the footings much deeper. Tree roots on the leafier IG8 roads and near Epping Forest dry out the ground in summer, so building control asks for the species, height and distance of trees nearby, including ones in neighbours' gardens. The answer may be deeper trench fill or piles with a suspended slab. It is established before the extension is priced, not when the trench is open.

How does a wrap-around extension affect the structure of my Woodford semi?

It opens two walls instead of one. The rear wall and the side wall both come out at the corner of the house, so the engineer designs a steel frame, often a goalpost with a post at the corner, to carry the first floor and the roof. Propping is more complex and the steel sequence matters. Building control inspects the frame before it is enclosed.

Can a two-storey extension on my Woodford house join the existing hipped roof?

Yes, but it needs careful structural design. The new roof ties into the old hip with a valley or a new hip, and some existing rafters are cut and supported on new timbers or steel. Matching the tiles and ridge height keeps it looking original. Planning permission is likely for two storeys, so the roof design is part of the application.

What if the garden behind my Woodford house slopes?

Then the extension needs stepped foundations and possibly a retaining wall, and the new floor level is set to match the house rather than the garden. Drainage becomes more important, since surface water runs towards the house. The steps and retaining design are agreed with the engineer and building control before digging, and the damp-proof course is kept above ground level.

Does a large Woodford extension pay the Community Infrastructure Levy?

It can, even as permitted development. Redbridge says a Community Infrastructure Levy charge applies if more than 100 square metres of new floor area is created, even if the works are permitted development. A two storey side extension combined with a rear wraparound on a detached Woodford house can pass that figure. Add up the new floor area on the drawings early, and handle the levy forms before starting on site rather than after.

Can a Woodford extension approved under building regulations now be built in two years?

Yes, provided work starts in time. A Redbridge full plans approval notice is valid for 3 years, and work started within that period can continue through to completion. Planning permission runs on its own clock, set out in the decision notice, so check both dates. For a Woodford household phasing an extension after a renovation, starting the foundations before the building regulations approval lapses keeps the approved design in force.

Which Woodford homes can use the Redbridge planning fast track for an extension?

Only a single dwellinghouse outside a conservation area. Redbridge's planning fast track must relate to a single dwellinghouse and is not available for sites in a conservation area. With 39% of Woodford homes being flats, a flat owner is excluded at the first test, and a house in the Woodford Green or Woodford Wells conservation areas at the second. For a house that passes both, ask about it before the application goes in.

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House Extensions Near Woodford

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