Kitchen Extension Builders in Lewisham (SE13, SE6)
Professional kitchen extension builders in Lewisham, South East London.
Why Choose All Well for Kitchen Extensions in Lewisham?
Lewisham's Victorian terraces — particularly around Lewisham High Street and towards Hither Green — are ideal for kitchen extensions that transform the classic dark rear kitchen into an open-plan living space. With property prices in SE13 running 20-30% below neighbouring Greenwich and Blackheath, many homeowners are investing in extensions that add both space and value.
Every project comes with a fixed-price contract, single project manager, and full certification including Building Control sign-off.
Kitchen Extensions for Lewisham Properties
Lewisham is known for its victorian terraces, edwardian semis, ex-council estates. Our kitchen extensions services are tailored to these property types, ensuring results that complement the character of your home.
Postcodes we cover: SE13, SE6
Kitchen Extensions Tip for Lewisham Homeowners
Lewisham Council has Article 4 directions in some streets that remove permitted development rights — we check this for every property before quoting. Properties near the Quaggy River or Ravensbourne corridor may sit in Flood Zone 2, requiring a Flood Risk Assessment (£300-£500) before a planning application can be submitted. The mix of clay and gravel subsoil in SE13 generally provides stable ground conditions, but properties near the river may need deeper foundations.
Three Lewisham kitchen extension patterns
Three patterns cover most of what we build in SE13 and SE6. Single-storey rear extension on a Victorian two-up-two-down is the most common Lewisham project. The classic narrow terraces around Lewisham High Street, Ladywell, and the streets running off Hither Green Lane have a dark galley kitchen at the back. We extend 3-4 metres into the rear garden, take out the wall between the kitchen and the dining room with a 152x89 UC steel beam, and finish with bifolds across the new rear elevation. Cost is £45,000-£75,000 including foundations on Lewisham's mixed clay and gravel (typically 1.0-1.2 metres), structural steel, glazing, electrics, plumbing, and finishes. Build time 10-14 weeks. Permitted development under Class A covers the standard 3-metre projection where Article 4 directions don't apply. Side return infill on a wider Edwardian terrace is the second pattern, common on the streets around Hither Green and Lee. The Edwardian terraces have side returns of 1.0-1.5 metres that infill with a glazed roof and steel-framed structure. Cost is £35,000-£60,000 including the structural roof, party wall foundations, glazing, and finishes. Build time 8-12 weeks. Party wall agreement with the neighbouring property is required because the side return sits on the shared boundary wall. Wraparound extension on an Edwardian semi is the third pattern, common in Hither Green and the streets around Lee Green. Combines a 3-metre rear projection with a side return infill. Creates 25-32 square metres of new open-plan space. Cost is £60,000-£95,000. Build time 12-16 weeks. The Edwardian semis often have cavity walls, which makes new insulation tie-in straightforward.
Article 4 directions, Quaggy flood risk, and Lewisham conservation areas
Three Lewisham factors affect kitchen extensions and need checking before any quote. Article 4 directions. Lewisham has introduced Article 4 directions on a number of streets — mostly clusters around the Lewisham, Lee, and Blackheath conservation areas. Article 4 removes specific permitted development rights and requires full planning permission for changes that would otherwise be permitted. They mainly affect front-of-property changes (cladding, window replacement, front-facing alterations) and rarely affect rear extensions, but where Article 4 covers rear-elevation changes, the £206 full planning fee applies and lead time extends from 6-8 weeks to 10-12 weeks. We verify the planning status of each property on the Lewisham planning portal at the survey before quoting. Quaggy and Ravensbourne flood zones. Properties near the Quaggy River, the Ravensbourne, or the Pool River floodplain may sit in Flood Zone 2 or 3 and 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. Cost of the assessment is typically £600-£1,200. Some 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. Higher-ground streets around Brockley, Telegraph Hill, and Hither Green Hill are outside flood zones. Lewisham, Lee, and Blackheath conservation areas. The three main residential conservation areas in Lewisham impose specific requirements on visible alterations — Lewisham Council can act on retrospective unauthorised changes. Front-facing changes need sympathetic design; rear extensions are generally fine because they're not visible from the street. The Culverley Green conservation area in Catford and the Forest Hill Conservation Area also affect properties on the borders. We check the boundary on the Lewisham planning portal at the survey.
Lewisham Council process and project management
Lewisham falls under Lewisham Council. Permitted development under Class A covers the standard 3-metre rear projection on a terrace and 4 metres on a semi or detached, except where Article 4 directions remove the right. The Larger Home Extension prior approval process covers 4-6 metre projections on terraces and 4-8 metres on semis or detached, with an 8-week neighbour consultation. Larger projects need full planning at £206. Lewisham typically determines applications in 8-10 weeks. We submit a Lawful Development Certificate (£103, 6-8 weeks at Lewisham) on permitted development projects for written confirmation, which protects the property at sale time. A Lewisham kitchen extension involves 12-15 trades over 10-16 weeks: demolition, foundations, drainage, structural steel, brick and block, roofing, glazing, plastering, electrics (NICEIC to BS 7671), plumbing, gas (Gas Safe), kitchen fitting, tiling, flooring, painting. We assign one project manager from survey through handover with photo updates throughout the build. Fixed-price contracts cover labour, materials, structural engineer calculations (£600-£1,200 for the steel and foundation design pack), Building Control fees (£400-£600 at Lewisham), FENSA glazing registration, party wall surveyor coordination (Agreed Surveyor route on terraces), Flood Risk Assessment where applicable, conservation area applications where relevant, and the Lawful Development Certificate or planning fee. Building Control inspections happen at foundation, DPC, drainage, structural steel, insulation (Part L: U-value 0.18 W/m²K for new walls and roof), and completion. Glazing is FENSA-registered. Origin or Schüco bifolds and Sieger sliders are common on Lewisham projects. Roof construction is warm-roof with 150mm PIR insulation. Where the extension projects over a Thames Water public sewer (common on the rear of the older Lewisham terraces), a Build Over Agreement is required (£317 fee plus CCTV survey) and we handle the application.
Kitchen Extensions in Lewisham: What's Included
Kitchen Extensions Pricing in Lewisham
£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
Lewisham
“Professional team, clear communication throughout. They handled everything including Building Control sign-off.”
Verified Customer
Lewisham
Frequently Asked Questions
- How much does a Lewisham kitchen extension cost?
- Single-storey rear extensions of 3-4 metres on Victorian terraces (the most common Lewisham project) run £45,000-£75,000 including foundations, structural steel, glazing, electrics, plumbing, and finishes. Side return infill on Edwardian terraces runs £35,000-£60,000. Wraparound extensions on Edwardian semis in Hither Green or Lee run £60,000-£95,000. Flood Risk Assessment for properties near the Quaggy or Ravensbourne adds £600-£1,200. Build Over Agreement with Thames Water adds £317 plus CCTV survey. Article 4 sites add the £206 planning fee and 4-6 weeks of lead time over a standard permitted development application. Fixed-price contract before any work starts.
- What are Article 4 directions and how do they affect Lewisham extensions?
- Article 4 directions are local planning rules that remove specific permitted development rights in designated streets. Lewisham has introduced Article 4 directions on clusters around the Lewisham, Lee, and Blackheath conservation areas — typically requiring full planning permission for changes that would otherwise be permitted development. They mainly affect front-of-property changes (cladding, window replacement, front-facing alterations) and rarely affect rear extensions, but where the direction covers rear-elevation changes the £206 full planning fee applies and lead time extends from 6-8 weeks to 10-12 weeks at Lewisham. We verify the planning status of each property on the Lewisham planning portal at the survey before quoting.
- Do I need a Flood Risk Assessment for a Lewisham extension?
- Possibly, depending on flood zone designation. Properties near the Quaggy River, Ravensbourne, or Pool River floodplain may sit in Flood Zone 2 or 3 and 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. Some riverside properties also need flood resilience measures (raised sockets, water-resistant materials below 600mm) which add £2,000-£5,000 to extension cost. Higher-ground streets around Brockley, Telegraph Hill, and Hither Green Hill are outside flood zones and don't need an assessment.
- Why hire All Well for a Lewisham kitchen extension?
- Three reasons. First, accuracy: we know the SE13 and SE6 stock — Article 4 boundaries, Quaggy and Ravensbourne flood zones, the Lewisham, Lee, and Blackheath conservation areas, and the mixed clay-gravel subsoil. Second, full accreditation: NICEIC for electrical (BS 7671), FENSA for glazing, Gas Safe registered for boiler relocation, structural engineer calculations included, 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, Build Over Agreement, party wall surveyor fees, and any Article 4 full planning application. 57 verified Google reviews averaging 4.5/5. Office on Limes Avenue, SE20.
Kitchen Extensions Near Lewisham
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