Kitchen Extension Builders in Clapham (SW4, SW11)
Professional kitchen extension builders in Clapham, South West London.
Why Choose All Well for Kitchen Extensions in Clapham?
Clapham families love their kitchen extensions, and we get it — the houses are gorgeous but the kitchens were designed for a Victorian household with servants, not for a family who wants to cook, eat, and live in one space. We've built wraparound extensions on the big terraces near Clapham Common, compact rear extensions on the tighter streets off Abbeville Road, and everything in between. Whatever the size of your plot, we'll find the best way to open up your ground floor.
Every project comes with a fixed-price contract, single project manager, and full certification including Building Control sign-off.
Kitchen Extensions for Clapham Properties
Clapham is known for its georgian and victorian terraces, period conversions. Our kitchen extensions services are tailored to these property types, ensuring results that complement the character of your home.
Postcodes we cover: SW4, SW11
Kitchen Extensions Tip for Clapham Homeowners
Clapham straddles Lambeth and Wandsworth — your planning authority depends on which side of the line you fall. The Abbeville Road and Clapham Old Town conservation areas have specific requirements about materials and roof forms that standard permitted development doesn't cover. We check the boundary for every property and design to the right council's guidelines. If you're near mature plane trees on the Common, expect deeper foundations — London Clay shifts when tree roots dry it out.
Three Clapham kitchen extension patterns
Three patterns cover most of what we build in SW4. Wraparound extensions are the flagship Clapham project. Combining a side return infill with a 4-5 metre rear extension creates a substantial open-plan kitchen-diner of 30-40 square metres. The wraparound suits the wider Victorian terraces around Abbeville Road, the Wandsworth Common borders, and the streets towards Wandsworth Road. Cost is £75,000-£120,000 including structural steelwork, foundations on London Clay (1.2-1.5 metres typical, deeper near mature plane trees on the Common), Crittall-style glazing or bifolds, electrics, plumbing, and finishes. Build time 14-18 weeks. Rear-only extensions of 3-4 metres are common on tighter streets where the side return is too narrow to gain meaningful space. Cost is £50,000-£80,000. Build time 12-14 weeks. Wandsworth's permitted development process covers the standard 3-metre rear extension on terraces without a planning application. Side return only extensions are less common but useful when the rear garden is shallow or planning rules limit rear projection. Cost is £35,000-£55,000. Build time 8-12 weeks. Party wall agreements with the neighbouring property are required because the side return shares a boundary wall. Since 2020 we've completed kitchen extensions across the SW4 streets, and our office in SE20 is 25 minutes from most Clapham properties.
Specification standards on Clapham kitchen extensions
Clapham clients typically specify premium materials and finishes. We're set up for that. Glazing is usually Crittall-style steel-frame doors and screens for the wraparound and side return extensions, with roof lanterns from suppliers like Atlas or Lonsdale providing overhead light. For the rear elevation, sliding doors (Schuco or Origin) or bifolds are the most common. Specifications include thermally broken aluminium frames, double or triple glazing with U-value 1.2-1.4 W/m²K, and FENSA registration on completion (we're FENSA-registered for installer compliance). Kitchen units come from a specialist supplier — Howdens for the mid-range, bespoke joinery for the higher specification. Worktops are typically engineered stone (Caesarstone, Silestone) or natural stone (Calacatta or Carrara marble for premium projects). Underfloor heating is standard on the new extension and often added to the existing kitchen-dining area at the same time. Electrics are designed to BS 7671 17th Edition standards, signed off by our NICEIC-registered electrician. Plumbing and gas connections are signed off under Gas Safe regulations where applicable. Building Control inspections and FENSA glazing registration are included in every project — the completion certificate is what proves the work is compliant when you sell or remortgage. Fixed-price contracts cover labour, materials, structural engineer calculations, all fees, and Building Control. Quote in writing within 48 hours of the survey.
Clapham planning and practical considerations
Clapham straddles two councils. Most of SW4 falls under Lambeth Council, but the streets near Clapham Junction in SW11 are under Wandsworth. The boundary runs roughly along Cedars Road and the railway line. We check the property's planning portal entry before quoting any extension that needs consent. Lambeth has specific design requirements in the Clapham Conservation Area, Abbeville Road conservation area, and Clapham Old Town conservation area. Wandsworth's process is generally faster for standard rear extensions. Georgian properties around Clapham Common are typically Grade II listed and need Listed Building Consent for any extension or alteration. The application process takes 8-12 weeks at Lambeth and runs in parallel with planning. We work with conservation-specialist architects on listed projects. Foundation depths vary with proximity to mature trees. The plane trees around Clapham Common and on the larger streets extract moisture from London Clay, which causes shrinkage and triggers subsidence on properties within 1-1.5 times tree height. Standard foundations of 1.0 metres aren't enough. The structural engineer specifies 1.5-2.0 metre or piled foundations based on a trial hole and tree survey, adding £4,000-£10,000 to extension cost on tree-affected sites. The structural engineer's specification is firm before we issue the contract. Most Clapham streets are controlled parking zones. Skip permits, scaffolding licences, and contractor vehicle access need to be coordinated with Lambeth or Wandsworth (typically £40-£80 per week per permit). We arrange these as part of every project.
Kitchen Extensions in Clapham: What's Included
Kitchen Extensions Pricing in Clapham
£45,000 – £90,000
10–14 weeks | Fixed-price contracts | No hidden costs
What Our Customers Say
“All Well managed our project from start to finish. The fixed-price contract meant no surprises, and the result is stunning.”
Verified Customer
Clapham
“Professional team, clear communication throughout. They handled everything including Building Control sign-off.”
Verified Customer
Clapham
Frequently Asked Questions
- How much does a Clapham kitchen extension cost?
- Wraparound extensions on the wider terraces (most common in Clapham) run £75,000-£120,000 including structural steelwork, foundations on London Clay, premium glazing, electrics, plumbing, and finishes. Rear-only extensions of 3-4 metres run £50,000-£80,000. Side return only extensions run £35,000-£55,000. The 15-20% premium over outer London boroughs reflects deeper foundations (mature plane trees) and the premium specifications Clapham clients usually choose. We provide a fixed-price contract after the survey. The price doesn't change unless the specification does.
- Which council do I apply to in Clapham?
- Most Clapham properties fall under Lambeth Council (most of SW4), but areas near Clapham Junction in SW11 are under Wandsworth. The boundary runs roughly along Cedars Road and the railway line. We check the property's planning portal entry before any application to confirm which authority applies. Lambeth has specific design requirements in the Clapham Conservation Area, Abbeville Road, and Clapham Old Town conservation areas. Wandsworth's process is faster for standard rear extensions. We handle the application as part of every project rather than asking you to navigate two parallel processes.
- Do I need Listed Building Consent on a Georgian Clapham property?
- Yes, on virtually any change to a Grade II listed property. The Georgian terraces around Clapham Common are typically listed and require Listed Building Consent for alterations including internal layout changes, removal or alteration of original features, replacement of original windows, and any external changes. Lambeth's conservation officer reviews each application individually. Application takes 8-12 weeks and runs in parallel with planning. We've handled multiple Listed Building Consent applications in Clapham and know what Lambeth's officers expect.
- Why should I hire All Well for a Clapham kitchen extension?
- Four reasons. First, fixed-price contracts: projects across 25 London boroughs since 2020 means we price accurately and absorb our own surprises. Second, single project manager from survey to handover, with photo updates throughout the build throughout. Third, full accreditation: NICEIC for electrical (BS 7671), FENSA for glazing, Building Control sign-off included on every project, and structural engineer calculations included. Fourth, 57 verified Google reviews averaging 4.5/5. Office on Limes Avenue, SE20, 25 minutes from most Clapham properties for surveys, mid-job decisions, and post-completion snagging.
Kitchen Extensions Near Clapham
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