Clapham’s Victorian and Edwardian terraces are some of the best houses in London to extend – the classic side return and rear garden give you room to create a full-width kitchen-diner. Tenfold Renovation designs and builds side return, single-storey rear, wraparound and double-storey extensions across Clapham, from Clapham Old Town to Clapham South. One team handles the design, the planning or permitted development route with Lambeth (or Wandsworth, depending on your street), building regulations, party wall notices and the build.
Call 020 8064 0975 or book a free survey and we will visit, measure up and talk through what is possible for your home.
We work across all of Clapham and the streets around it, including:
- Clapham Old Town and Clapham Manor – Georgian and early Victorian houses, many in conservation areas
- Clapham Common, Clapham North and Clapham South – long Victorian terraces with side returns
- Abbeville Village and Clapham Park – Victorian and Edwardian family homes
- Between the Commons and Northcote Road – Victorian terraces on the Wandsworth side of Clapham
- Stockwell and Brixton borders – terraced and semi-detached houses
We also build house extensions across South London, including Battersea, Wimbledon, Sutton and Croydon. Prefer to go up rather than out? See our loft conversions in Clapham.
Side Return Extension
The signature Clapham extension. Building into the narrow passage beside the back addition turns a galley kitchen into a wide, light-filled room – often with a glazed roof so the middle of the house stays bright.
Single-Storey Rear Extension
Pushing the back of the house into the garden creates a larger kitchen-diner or family room with bi-fold or sliding doors. Many fall under permitted development if they stay within the size limits.
Wraparound Extension
A side return and rear extension combined into one L-shaped, open-plan space – the biggest ground-floor gain on a Clapham terrace. It usually needs full planning permission.
Double-Storey Extension
Adds a larger living area downstairs and an extra bedroom or bathroom above. On terraced streets it needs careful design and planning permission, so we check what the council is likely to accept before drawing.
Garage Conversion
Where a house has an attached garage, converting it gives a home office, playroom or guest room without extending. Building regulations approval is always required; planning permission often is not.
Not Sure Which Suits Your Home?
Book a free survey. We look at your house, side return, garden and access and tell you which options are realistic – and which need planning permission – before you pay for drawings.
Not always. Many single-storey rear extensions can be built under permitted development, but double-storey, wraparound and most side return extensions need planning permission. Much of Clapham is covered by conservation areas – including Lambeth’s Clapham conservation area around the Common, Rectory Grove around Clapham Old Town and Clapham Manor Street, and Clapham Park and Northbourne Road – where permitted development rights are more limited and designs are reviewed more closely. Building regulations approval is needed in every case.
Under permitted development (England, houses only – not flats or maisonettes), a single-storey rear extension can generally go:
- up to 3 m deep on a terraced or semi-detached house, or 4 m on a detached house;
- up to 6 m / 8 m deep using the prior approval process (the council notifies your neighbours first);
- no higher than 4 m, and no higher than 3 m at the eaves if within 2 m of a boundary.
Most of Clapham is in Lambeth, but streets west of the Common fall under Wandsworth, so we confirm which council and which rules apply to your address before design starts. Sources: Planning Portal – Extensions, Lambeth – Clapham conservation area.
On a Clapham terrace you share walls on both sides, and a side return is usually built on or right next to the boundary – so the Party Wall etc. Act 1996 almost always applies. We tell you early which neighbours need a notice and when, so the build is not delayed. If a neighbour consents in writing, work can go ahead; if not, a party wall surveyor agrees how the work will be carried out.
1. Free Survey and Brief
We visit your Clapham home, measure up and talk through what you need, how you use the space and your budget.
2. Design and Drawings
Plans, elevations and 3D ideas you can change before anything is fixed.
3. Planning or Permitted Development
We prepare and submit the planning application or Lawful Development Certificate to Lambeth or Wandsworth Council.
4. Building Regulations
Structural calculations, steel design and building control approval, arranged by us.
5. Build
One site team for groundworks, structure, roof, glazing, electrics, plumbing and finishing.
6. Sign-Off and Handover
Building control completion certificate and a final walk-round with you.
The price depends on the type and size of the extension, the glazing and finishes, ground conditions and access. Most Clapham terraces have no side access, so materials and waste go through the house, and parking and skip permits on busy streets add time to plan. Conservation-area homes may also need matching brick, sash-style windows or specific roof details. A side return or single-storey rear extension is usually the most affordable option; wraparound and double-storey extensions cost more.
After the survey we give you a fixed, itemised written quote, so you know exactly what is included before any work starts.
Rated 5.0 from 14 Google reviews.
Julia & Riccardo – Rear Extension, Balham
“We recently had the pleasure of working with Vitaliy of Tenfold Renovation on a rear extension for our house in Balham, and we are very happy with the result. … The rear extension not only meets but surpasses all expectations.”
★★★★★ Google review
Samuel – House Extension
“I used tenfold renovation for an extension on my property … they never let me down. Always kept me in the loop and involved … they completed the project on time and had a smooth handover.”
★★★★★ Google review
Linda – Large Renovation
“Quite a large job done at my property. Excellent workmen, respectful of my property … workmanship was first class. Would highly recommend them.”
★★★★★ Google review
How long does a side return extension in Clapham take?
A typical side return or single-storey rear extension takes around 10–14 weeks on site; wraparound and double-storey extensions take longer. Design, planning and approvals add time before work starts, so we give you a full timeline after the survey.
Is my Clapham home in Lambeth or Wandsworth?
Most of Clapham is in Lambeth, but the area west of Clapham Common – including Between the Commons and Northcote Road – is in Wandsworth. The council decides planning and building control, so we confirm it for your address at the survey.
Can I extend a house in a Clapham conservation area?
Yes, but it usually needs planning permission and a design that suits the street – for example matching brick, roof form and window styles. We check whether your home is in a conservation area before design starts and shape the drawings to suit.
Can I live in my home during the extension?
Usually yes. Most of the work happens outside until we break through into the existing house near the end. We plan that stage with you so the kitchen is out of action for as short a time as possible.
Do you handle planning permission and building regulations?
Yes. We prepare the drawings, submit the planning application or Lawful Development Certificate, and arrange building control approval and the completion certificate.
Do you also do loft conversions in Clapham?
Yes – many Clapham terraces suit a rear dormer or L-shaped loft. See our loft conversions in Clapham.
Contact Us Now
Reach out today to discuss your extension project with our friendly and experienced team.
We Are Experienced
Tenfold Renovation has been designing and building home extensions and renovations across South and South-West London for many years, working from our base in SW19 – a short drive from Clapham.
House Extension Specialists in Clapham
We work with experienced architects and structural engineers, and our own team covers the trades an extension needs – groundworks, bricklaying, carpentry, roofing, glazing, electrics, plumbing and decorating – all managed by one project lead, so nothing falls between contractors.
Top Quality of Work
Our clients regularly mention tidy sites, clear communication and work finished to a high standard. You can read their Google reviews above.
Safety Is Our Top Concern
Building work involves heavy machinery and debris, so our team follows strict safety procedures throughout, keeping the site safe for our workers and for everyone living in the house.
Tell us about your home and what you would like to add. We will arrange a visit, measure up and give you a fixed, itemised written quote – call 020 8064 0975, email office@tenfoldrenovation.com or send us your details.