Kitchen Extension Builders in Croydon (CR0, CR2)
Professional kitchen extension builders in Croydon, South London.
Why Choose All Well for Kitchen Extensions in Croydon?
Croydon's 1930s semis and Victorian terraces in South Croydon make kitchen extensions one of the most popular home improvements in the borough. The 1930s houses in particular have good-sized plots with rear gardens deep enough for a substantial extension, and the property prices in CR0 and CR2 mean the improvement cost is a smaller proportion of the house value than in inner London — making the return on investment even more compelling.
Every project comes with a fixed-price contract, single project manager, and full certification including Building Control sign-off.
Kitchen Extensions for Croydon Properties
Croydon is known for its victorian and edwardian terraces, 1930s semis, new builds. Our kitchen extensions services are tailored to these property types, ensuring results that complement the character of your home.
Postcodes we cover: CR0, CR2
Kitchen Extensions Tip for Croydon Homeowners
The 1930s properties that dominate much of Croydon often have concrete raft foundations rather than strip foundations. In some cases, the existing raft can be extended to support the new extension, which saves significant groundwork costs. The chalk and clay subsoil in Croydon is generally stable, but properties on chalk escarpments can occasionally have dissolution features that need investigation. Croydon Council is proactive about supporting home improvements and their planning portal is straightforward to navigate.
Three Croydon kitchen extension patterns
Three patterns cover most of what we build in CR0 and CR2. Wide rear extension on a 1930s semi is the most common Croydon project. The 1930s semis around Sanderstead, Purley, Selsdon, and the streets running off Brighton Road have wide plots — typically 7-9 metres of rear elevation with side access on the detached side. We extend 4 metres into the rear garden across the full width of the existing rear wall, take out the load-bearing wall between the kitchen and the dining room with a 178x102 UB or 203x133 UB steel beam, and finish with bifolds or sliders across the new rear elevation. Cost is £45,000-£75,000 including foundations on Croydon's mixed chalk and clay subsoil (typically 1.0-1.2 metres on standard sites), structural steel, glazing, electrics, plumbing, and finishes. Build time 12-14 weeks. Permitted development under Class A covers the full 4-metre projection on a semi. Deep rear extension on a 1930s detached is the second pattern, common on the larger plots in Sanderstead and Purley. Class A permits up to 8 metres on a detached property under the Larger Home Extension prior approval process (8-week neighbour consultation). Cost is £60,000-£95,000 for a 5-6 metre projection. Build time 14-16 weeks. The detached layout means no party wall is shared, which simplifies the project significantly. Rear extension on a Victorian terrace is the third pattern, common in South Croydon and Thornton Heath. The classic two-up-two-down terraces have side returns of 0.9-1.2 metres that some properties infill alongside the rear extension to create a wraparound. Cost is £45,000-£75,000 for a rear-only project; £60,000-£90,000 for a wraparound. Build time 12-16 weeks. Party wall agreement with the neighbouring property is required.
Croydon structural detail — concrete raft foundations, chalk subsoil, Sanderstead
Three Croydon factors distinguish kitchen extensions here from inner London projects. Concrete raft foundations on 1930s properties. A high proportion of Croydon's 1930s housing stock sits on concrete raft slabs rather than traditional Victorian strip foundations. Where the existing raft extends slightly beyond the rear wall and is in good condition at sufficient depth, the new extension can sometimes tie into the existing raft with a structural connection rather than requiring entirely new strip footings. Saves £2,000-£3,500 on groundwork compared with full new foundations. The structural engineer assesses the existing raft at the survey by lifting a slab section to confirm construction and depth. Where the raft is shallow or in poor condition, full new strip foundations apply at standard cost. Chalk and clay subsoil. CR0 and CR2 sit on a transition between London Clay (lower-lying streets) and the chalk escarpment running south through Sanderstead and Selsdon. Most sites have stable ground requiring standard 1.0-1.2 metre foundations. Properties near former springs, natural watercourses, or known chalk dissolution features may have localised subsidence risk that needs ground investigation before the structural design is finalised — typical on a small minority of streets and identified by a trial hole at the survey. Adds £600-£1,200 to surveying cost where ground investigation is needed. Semi-detached and detached advantage. Croydon's housing stock is dominated by 1930s semi-detached and detached properties rather than tightly-packed Victorian terraces. This simplifies several aspects of an extension: only one party wall to deal with on a semi (none on a detached), wider side access for materials delivery and waste removal, easier crane or pump access for foundation pour. Site setup time on a Croydon 1930s semi is typically half a day versus a full day on a tightly-packed inner London terrace.
Croydon Council process and project management
Croydon falls under Croydon Council, which has been proactive in supporting home improvements as part of the broader town centre regeneration. Permitted development under Class A covers the standard 3-metre rear projection on a terrace and 4 metres on a semi or detached. 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. Croydon typically determines applications in 6-8 weeks. We submit a Lawful Development Certificate (£103, 6-8 weeks at Croydon) on permitted development projects for written confirmation, which protects the property at sale time. The South Croydon and Sanderstead conservation areas have additional design requirements for visible alterations. A Croydon kitchen extension involves 12-15 trades over 12-18 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 (£700-£1,400 for the steel and foundation design pack including any concrete raft assessment), Building Control fees (£350-£600 at Croydon — among the lower end for London), FENSA glazing registration, party wall surveyor coordination (Agreed Surveyor route on semis), conservation area applications where relevant, trial hole investigation, 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 standard on Croydon projects. Croydon specifications typically run mid-range — Caesarstone or Silestone worktops, kitchen joinery from Howdens or Magnet, mid-spec appliances. Roof construction is warm-roof with 150mm PIR insulation. Underfloor heating is standard.
Kitchen Extensions in Croydon: What's Included
Kitchen Extensions Pricing in Croydon
£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
Croydon
“Professional team, clear communication throughout. They handled everything including Building Control sign-off.”
Verified Customer
Croydon
Frequently Asked Questions
- How much does a Croydon kitchen extension cost?
- Wide rear extensions of 4 metres on 1930s semis (the most common Croydon project) run £45,000-£75,000 including foundations, structural steel, glazing, electrics, plumbing, and finishes. Deep rear extensions of 5-6 metres on 1930s detached houses run £60,000-£95,000. Rear extensions on Victorian terraces in South Croydon run £45,000-£75,000; wraparound extensions run £60,000-£90,000. Concrete raft tie-in saves £2,000-£3,500 on groundwork on suitable 1930s sites. Larger Home Extension prior approval (for 4-8 metre projections on semis or detached) adds 8 weeks lead time but no additional planning fee on top of the £103 application. Fixed-price contract before any work starts.
- Can my Croydon extension tie into the existing concrete raft?
- Often yes, on 1930s properties. A high proportion of Croydon's 1930s housing stock sits on concrete raft slabs rather than traditional strip foundations. Where the existing raft extends slightly beyond the rear wall and is in good condition at sufficient depth, the new extension can tie into the existing raft with a structural connection rather than requiring entirely new strip footings — saves £2,000-£3,500 on groundwork. The structural engineer assesses the existing raft at the survey by lifting a slab section to confirm the construction. Where the raft is shallow or in poor condition or the new loading exceeds the existing slab capacity, full new strip foundations apply at standard cost. The decision is firm before the contract is signed.
- Does the chalk subsoil in Croydon affect extension foundations?
- Usually no, but occasionally yes. CR0 and CR2 sit on a transition between London Clay (lower-lying streets) and the chalk escarpment running south through Sanderstead and Selsdon. Most sites have stable ground requiring standard 1.0-1.2 metre foundations. Chalk dissolution features can occur on properties near former springs, natural watercourses, or known geological lineaments — these create localised subsidence risk that needs ground investigation before the structural design is finalised. Identified by a trial hole at the survey. Adds £600-£1,200 to surveying cost where ground investigation is needed and the structural engineer specifies foundation depth or piled foundations from the trial hole data. Standard sites just need standard foundations.
- Why hire All Well for a Croydon kitchen extension?
- Three reasons. First, accuracy: we know the CR0 and CR2 stock — which 1930s streets have concrete raft foundations, where chalk subsoil might affect foundation design, the South Croydon and Sanderstead conservation areas, and which 4-8 metre projections need Larger Home Extension prior approval. 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 concrete raft assessment, party wall surveyor fees, conservation area applications, and trial-hole foundation reassessment. 57 verified Google reviews averaging 4.5/5. Office on Limes Avenue, SE20.
Kitchen Extensions Near Croydon
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