Kitchen Extension Builders in Dulwich (SE21, SE22)
Professional kitchen extension builders in Dulwich, South East London.
Why Choose All Well for Kitchen Extensions in Dulwich?
Dulwich's large Victorian villas and Edwardian detached houses offer exceptional scope for kitchen extensions. Properties in East Dulwich (SE22) commonly have deep rear gardens allowing extensions of 5-6 metres, creating substantial open-plan kitchen-diners that become the heart of the home. Dulwich homeowners want premium specifications and finishes that match the character of these period houses.
Every project comes with a fixed-price contract, single project manager, and full certification including Building Control sign-off.
Kitchen Extensions for Dulwich Properties
Dulwich is known for its victorian villas, edwardian detached, conservation areas. Our kitchen extensions services are tailored to these property types, ensuring results that complement the character of your home.
Postcodes we cover: SE21, SE22, SE24
Kitchen Extensions Tip for Dulwich Homeowners
Parts of Dulwich are controlled by the Dulwich Estate, which has its own design guidelines on top of Southwark Council planning rules. The Estate restricts certain materials, window styles, and roof forms. We check Estate boundaries during the free site visit and factor their requirements into the design. London Clay beneath Dulwich shrinks in dry weather and swells when wet, so extensions near mature trees require deeper foundations (typically 2.0-2.5 metres) to avoid clay heave.
Kitchen extension types we build in SE21, SE22 and SE24
Three patterns cover most of what we build across Dulwich. Which one suits your property depends on plot depth, side return width, and whether you're on the Dulwich Estate.
Wraparound and rear extensions on East Dulwich Victorian villas
The flagship Dulwich project is a wraparound on a Victorian villa, side return infill combined with a 4-5 metre rear projection, creating an open-plan kitchen-diner of 35-50 square metres. The large villas along Lordship Lane, the streets running off Court Lane, and the wider plots in Dulwich Village typically have side returns of 1.4-2.0 metres and deep rear gardens that make this work. The build includes piled or deep trench-fill foundations on London Clay (typically 1.8-2.5 metres deep near mature trees), Crittall-style steel-frame doors, roof lanterns, and premium kitchen joinery and finishes. Build time 16-20 weeks. Dulwich Estate scheme of management consent is required on Estate properties.
Rear extensions on Edwardian detached houses and side returns on West Dulwich terraces
The Edwardian detached houses near Dulwich Park and along Dulwich Village streets suit 5-6 metre rear projections of 30-40 square metres over 14-18 weeks. Where the rear projection exceeds 4 metres on a detached property, the Larger Home Extension prior approval process applies, an 8-week neighbour consultation under permitted development rules. On narrower West Dulwich SE21 terraces with shallower gardens, a side return only extension is the practical option, over 8-12 weeks. Party wall agreement with the neighbouring property is required.
Dulwich Estate consent, listed buildings, and clay-heave foundations
Standard Southwark Council planning is only part of the picture in Dulwich. Three factors are specific to this area and add planning layers you won't encounter in most other South London boroughs.
Dulwich Estate scheme of management and Grade II listed buildings in Dulwich Village
Most of SE21 and large parts of SE22 and SE24 sit within the Dulwich Estate, which holds residual covenants on properties sold from the original Estate. Estate consent is separate from Southwark Council planning and is required for any external alteration: extensions, window changes, render colours, front doors, roof material. The Estate's design requirements typically specify slate roofs, timber sash windows, lime mortar pointing, and traditional stock brick or matching render. Application takes 6-10 weeks at the Estate office and runs in parallel with Southwark planning. We handle both as part of every project. Many Georgian and early-Victorian villas in Dulwich Village are Grade II listed and require Listed Building Consent for any extension or external alteration, 8-12 weeks at Southwark Council. We work with conservation-specialist architects on listed projects and specify heritage materials matched to the original.
Deep foundations near mature trees on London Clay
The plane trees, oaks, and limes along Court Lane and Dulwich Common extract moisture from London Clay in dry weather, causing clay shrinkage and subsidence risk on properties within 1-1.5 times tree height. Standard 1.0-1.2 metre strip foundations aren't enough. The structural engineer specifies depth based on a trial hole and tree survey, typically 1.8-2.5 metres of trench-fill or short bored piles. Tree Preservation Orders are common across Dulwich and removing trees for an extension is rarely permitted. We design the foundations to suit the site and confirm the approach before work starts.
How a Dulwich kitchen extension is managed from survey to handover
A Dulwich kitchen extension involves 14-18 trades over 14-20 weeks. One project manager runs the job from initial survey through to handover, with photo updates throughout the build.
What's included in a fixed-price Dulwich kitchen extension contract
Fixed-price contracts cover labour, materials, structural engineer calculations for clay-heave foundation design, Building Control fees at Southwark, FENSA glazing registration, party wall surveyor coordination, Dulwich Estate consent fees, Listed Building Consent fees on listed projects, planning fees including the £129 Lawful Development Certificate, trial hole investigation, and Larger Home Extension prior approval consultation where needed. The price is fixed and confirmed after a free site visit, and doesn't change unless the specification does. Where the extension projects over a Thames Water public sewer, a Build Over Agreement is required, including a CCTV survey. We handle the application as part of the project. Building Control inspections cover foundation, DPC, drainage, structural steel, insulation (Part L: U-value 0.18 W/m²K for new walls and roof), and completion.
Kitchen Extensions in Dulwich: What's Included
How I price kitchen extensions in Dulwich
I price every kitchen extensions job in Dulwichafter I’ve seen it. No two properties are the same, so a number here would only mislead you. What you get instead is a fixed-price contract, a week-by-week programme, and no costs that turn up later.
Get a fixed quoteWhat 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
Dulwich
“Professional team, clear communication throughout. They handled everything including Building Control sign-off.”
Verified Customer
Dulwich
Frequently Asked Questions
- Do I need Dulwich Estate consent on top of Southwark planning?
- If your property is on the Dulwich Estate (most of SE21 and large parts of SE22 and SE24), yes. Estate consent is separate from Southwark Council planning permission and is required for external alterations including extensions, window changes, render colours, front doors, and roof material changes. The Estate has design requirements covering proportions, materials, and elevations: slate roofs, timber sash windows, lime mortar pointing, and traditional stock brick or matching render are typical. Application takes 6-10 weeks at the Estate office and runs in parallel with the Southwark planning application (typically 8-10 weeks for permitted development confirmation, 8-12 weeks for full planning). We handle both as part of every project.
- Why do Dulwich extensions need such deep foundations?
- Two reasons. First, London Clay subsoil beneath Dulwich shrinks in dry weather and swells when wet, causing seasonal ground movement that standard 1.0-1.2 metre strip foundations don't accommodate. Second, the mature plane trees, oaks, and limes along Court Lane, Dulwich Common, and the larger garden plots extract significant moisture from the clay during dry weather, causing localised clay shrinkage and subsidence risk on properties within 1-1.5 times tree height. The structural engineer specifies foundation depth based on a trial hole and tree survey, typically 1.8-2.5 metres of trench-fill or short bored piles. Tree Preservation Orders are common and removing trees for an extension is rarely permitted.
- Why hire All Well for a Dulwich kitchen extension?
- Three reasons. First, planning experience: we handle Dulwich Estate consent applications alongside Southwark planning and Listed Building Consent on Grade II properties. We know what the Estate accepts and what triggers refusal. Second, full accreditation: NICEIC for electrical (BS 7671), FENSA for glazing, Gas Safe registered for boiler relocation, structural engineer calculations including clay-heave foundation design, and Building Control sign-off included on every project. Third, fixed-price contracts: the quote is confirmed after a free site visit and doesn't change unless the specification does, including Estate consent fees, conservation architect coordination, deep clay-heave foundations, and any Listed Building Consent application. Office on Limes Avenue, SE20.
All Well has completed 100+ projects across 25 London boroughs since 2020. We are NICEIC approved for electrical work, FENSA registered for glazing, and CHAS certified for site safety, with Public Liability insurance to £5 million. 57+ Google reviews average 4.5 stars. All Well Property Services® is a UK registered trademark, Companies House no. 12721034, operating from Unit 1 Limes Avenue, Anerley SE20 8QR.
Get a Free Quote for Your Dulwich Kitchen Extensions
Fixed-price quote, no obligation. Call us or fill out our form.