Kitchen Extension Builders in Wandsworth (SW18)
Professional kitchen extension builders in Wandsworth, South West London.
Why Choose All Well for Kitchen Extensions in Wandsworth?
Wandsworth town has a mix of Victorian terraces near the Common and larger period houses towards the river, both of which are ripe for kitchen extensions. The terraces follow the standard South London pattern — separate kitchen, separate dining room, both too small — while the bigger houses often have kitchens that are large enough but dated and disconnected from the garden. Either way, a rear extension with bifold doors is the answer, and we've built enough of them in SW18 to know exactly what works.
Every project comes with a fixed-price contract, single project manager, and full certification including Building Control sign-off.
Kitchen Extensions for Wandsworth Properties
Wandsworth is known for its victorian terraces, riverside developments, period houses. Our kitchen extensions services are tailored to these property types, ensuring results that complement the character of your home.
Postcodes we cover: SW18
Kitchen Extensions Tip for Wandsworth Homeowners
Wandsworth Council is known for being business-friendly and efficient with planning applications. The Wandsworth Common conservation area has design guidelines, but most streets in SW18 are outside it and standard permitted development applies. Properties near the Wandle river may be in Flood Zone 2 — this doesn't prevent an extension but requires a Flood Risk Assessment. The clay and gravel mix in Wandsworth provides reasonable ground conditions, though properties near the Thames need deeper foundations due to higher water tables.
Three Wandsworth kitchen extension patterns
Three patterns cover most of what we build in SW18. Single-storey rear extension on a Victorian terrace is the most common. The terraces around Wandsworth Common, Earlsfield, and Magdalen Road have classic dark galley kitchens that get transformed by 4-5 metre rear extensions with bifold doors and roof lanterns. Cost is £55,000-£90,000 including structural steelwork, foundations on Wandsworth's mixed clay and river gravel (typically 1.0-1.5 metres), glazing, electrics, plumbing, and finishes. Build time 12-14 weeks. Wandsworth Council's permitted development process is among the fastest in London for the standard 3-metre rear extension. Side return extension is the second pattern, common on the wider terraces between Wandsworth High Street and the river that have side passages of 1.0-1.5 metres. Combined with knocking through the existing kitchen wall, the result is a wider open-plan kitchen-diner without giving up garden space. Cost is £35,000-£60,000. Build time 8-12 weeks. Party wall agreements with the neighbouring property are required because the side return shares a boundary wall. Wraparound extension on properties with both a side return and a deep rear garden combines both into a substantial open-plan kitchen-diner. Cost is £75,000-£115,000. Build time 14-16 weeks. The Wandsworth Common conservation area imposes additional design requirements but Wandsworth's planning team typically approves rear-and-side extensions with appropriate materials.
Wandsworth subsoil and Thames considerations
Wandsworth's subsoil varies depending on proximity to the Thames and the Wandle. Properties near Wandsworth Common have standard London Clay foundations of 1.0-1.2 metres. Properties closer to the river or near mature trees may need 1.2-1.5 metres or piled foundations. Properties within 200-300 metres of the Thames or in the lower-lying areas around the Wandle (mostly in Flood Zone 2 or 3) need a Flood Risk Assessment as part of the planning application for any new extension. The Environment Agency's flood risk maps confirm the zone designation, and we check this at the survey before quoting. Cost of the assessment is typically £600-£1,200 and we coordinate it as part of the planning process. Some Wandsworth riverside properties also need flood resilience measures (raised electrical sockets, water-resistant materials in lower levels) which add £2,000-£5,000 to extension cost. The gravel deposits along the Wandle and Thames corridors have higher load-bearing capacity than London Clay but can be more variable in depth. We do a trial hole investigation on properties near these corridors to give the structural engineer the data needed to specify the right foundation. The cost is firm before the contract is signed. Properties around Wandsworth Common itself have well-drained gravel and chalk subsoil with shallower foundation requirements than the lower-lying streets. Mature trees on the Common can affect foundations on adjacent properties — we factor tree-root influence zones into the foundation design where applicable.
Wandsworth Council process and standards
Wandsworth Council is regarded as one of London's most efficient planning departments with competitive fees and fast turnaround times. Permitted development covers the standard 3-metre rear extension on terraces (or 4 metres on semis). We submit a Lawful Development Certificate (£103, 6-8 weeks at Wandsworth) for written confirmation, which protects the property at sale time. Larger extensions need full planning. Wandsworth typically determines applications in 8-10 weeks (faster than the 13-week statutory limit), and the council publishes design guidance that makes it straightforward to design within accepted parameters. Wandsworth's pre-application advice service is useful for borderline cases. The Wandsworth Common, Old Wandsworth, and Earlsfield conservation areas have additional requirements for visible alterations. Front-facing changes are generally refused; rear extensions are usually approved with appropriate materials. We design to Wandsworth's published guidelines from the outset. All glazing is FENSA-registered with thermal performance to U-value 1.2-1.4 W/m²K. Electrical work is signed off under BS 7671 by our NICEIC-registered electrician. Building Control inspections happen at foundation, drainage, structure, insulation, and completion stages, and the completion certificate is delivered at handover. Fixed-price contracts cover labour, materials, structural engineer calculations, FENSA registration, planning fees, Building Control fees, party wall surveyor coordination, and any conservation area or Flood Risk Assessment requirements. The price doesn't change unless the specification does.
Kitchen Extensions in Wandsworth: What's Included
Kitchen Extensions Pricing in Wandsworth
£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
Wandsworth
“Professional team, clear communication throughout. They handled everything including Building Control sign-off.”
Verified Customer
Wandsworth
Frequently Asked Questions
- How much does a Wandsworth kitchen extension cost?
- Single-storey rear extensions of 4-5 metres run £55,000-£90,000 including structural steelwork, foundations, glazing, electrics, plumbing, and finishes. Side return extensions run £35,000-£60,000. Wraparound extensions on the wider properties run £75,000-£115,000. Cost is broadly in line with neighbouring SW London boroughs at the same specification level. Riverside properties needing Flood Risk Assessment add £600-£1,200 for the assessment plus £2,000-£5,000 for any resilience measures. Fixed-price contract after the survey. The price doesn't change unless the specification does.
- Why is Wandsworth Council known as a good planning authority?
- Three reasons. First, fast turnaround times — Wandsworth typically determines permitted development applications in 4-6 weeks rather than the 8-week statutory limit, and full planning applications come back in 8-10 weeks rather than the typical 13. Second, competitive fees at the low end for London. Third, clear guidance — the council publishes design guides for extensions, dormers, and conservation area work that make it straightforward to design within their accepted parameters. Wandsworth's pre-application advice service is also useful for borderline cases.
- Do I need a Flood Risk Assessment for a Wandsworth extension?
- Possibly, depending on flood zone designation. Properties in Flood Zone 2 or 3 (mostly within 200-300 metres of the Thames or the Wandle) need a Flood Risk Assessment as part of the planning application for any new extension. The Environment Agency's flood risk maps confirm the zone designation, and we check this at the survey before quoting. Cost is typically £600-£1,200 and we coordinate it as part of the planning process. Properties on higher ground around Wandsworth Common are usually outside flood zones and don't need an assessment.
- Why hire All Well for a Wandsworth kitchen extension?
- Three reasons. First, accuracy: we know the SW18 stock — typical foundation depths near the Wandle and Thames, the Wandsworth Common conservation area, and the council's fast permitted development process. Second, full accreditation: NICEIC electrical (BS 7671), FENSA glazing, Gas Safe boiler work, structural engineer calculations, and Building Control sign-off included on every project. Third, fixed-price contracts: the quote doesn't change unless the specification does, including Flood Risk Assessment and any flood resilience measures. 57 verified Google reviews averaging 4.5/5. Office on Limes Avenue, SE20.
Kitchen Extensions Near Wandsworth
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