Kitchen Extension Builders in Penge (SE20)
Professional kitchen extension builders in Penge, South East London.
Why Choose All Well for Kitchen Extensions in Penge?
Penge is right next door to our office, and we've built enough kitchen extensions on these Victorian terraces to know every variation by heart. The houses on Penge High Street, Maple Road, and Green Lane all have similar layouts, a narrow kitchen at the back with a separate dining room, and they all transform the same way: knock out the rear wall, extend 3-4 metres, put in bifold doors, and open up the internal wall to create one big room. Simple, effective, and it changes how you live in the house.
Every project comes with a fixed-price contract, single project manager, and full certification including Building Control sign-off.
Kitchen Extensions for Penge Properties
Penge is known for its victorian terraces, edwardian cottages, period properties. Our kitchen extensions services are tailored to these property types, ensuring results that complement the character of your home.
Postcodes we cover: SE20
Kitchen Extensions Tip for Penge Homeowners
Penge properties are under Bromley Council with no conservation restrictions, so permitted development is straightforward. The houses tend to sit on mixed clay and gravel, and foundations go to 1.0-1.3 metres. Being five minutes from our yard means materials can be on site the same morning they're needed, and we can pop over to check on things without it being a half-day trip. That proximity makes a real difference to how smoothly the project runs.
Kitchen extension types we build on SE20 Victorian and Edwardian properties
Three patterns cover most of what we build in Penge. The housing stock, Victorian terraces, Edwardian cottages, and Edwardian semis, largely determines which one fits your plot.
Single-storey rear and side-return extensions on Penge terraces
The terraces along Penge High Street, Maple Road, Green Lane, and the streets running off Penge Lane share the same layout: a small dark kitchen at the back, separate dining room in front. We extend 3-4 metres into the rear garden, take out the load-bearing wall between kitchen and dining room with a slimline steel beam (typically 152x89 UC for a 3.5-metre span), and finish with bifolds or a slider across the new rear elevation. That includes foundations, structural steel, glazing, electrics, plumbing, and finishes. Build time 10-14 weeks. Side-return infill on the wider Edwardian cottages near Penge West station, where side returns run 0.9-1.3 metres, creates a wider open-plan kitchen-diner without giving up rear garden space. That includes the steel-framed roof structure, party wall foundations, glazing, and finishes. Build time 8-10 weeks.
Wraparound kitchen extensions on Edwardian semis near Cator Park
The larger plots near Cator Park suit a wraparound: rear projection combined with side-return infill, creating 22-32 square metres of new open-plan space. Build time 12-16 weeks. Edwardian properties here typically have cavity walls, which makes insulation tie-in straightforward. Cavity fill achieves a U-value of 0.18-0.21 W/m²K without losing internal floor area.
Ground conditions, party walls, and public sewers on Penge kitchen extensions
Three SE20-specific factors affect the design of a kitchen extension in Penge. We investigate all three at the survey stage before any quote is issued.
Groundwater on Penge's lower-lying streets and what it means for foundations
Penge sits at the bottom of the Crystal Palace ridge. The streets near Penge East and Penge West stations have persistently higher groundwater than properties higher up the slope. Strip foundations on saturated London Clay need to reach 1.2-1.5 metres minimum to find stable bearing strata, and the trench may need pumping during pour where water seeps in faster than the concrete can be placed. We dig a trial hole at the survey on every Penge project so the structural engineer can specify from actual data rather than a generic estimate. The wettest sites need deeper, more involved foundations, and we confirm exactly what's required from that trial hole before the quote. Party wall mechanics on Penge terraces follow the same pattern: 9-inch solid brick shared walls trigger Party Wall Act 1996 requirements where excavation is within 3 metres of neighbour foundations or where new openings are cut for structural steelwork. Notice must be served at least two months before work starts. We use the Agreed Surveyor route where neighbours dissent, a single-fee arrangement rather than each side appointing separately.
Thames Water Build Over Agreements for Penge rear extensions
Many Penge terraces sit over public sewers running along the rear of the gardens, particularly on the older streets near Penge High Street where the original Victorian sewers haven't been redirected. Where a new extension projects over a public sewer, Thames Water requires a Build Over Agreement, which includes a CCTV survey of the existing sewer. The structural design typically includes a reinforced concrete lintel over the sewer to spread loading. We carry out the CCTV survey at the quote stage and handle the application as part of the project, and the price is firm before the contract is signed.
Bromley Council planning, Building Control, and how we manage a Penge kitchen extension project
Penge falls under the London Borough of Bromley. There's no conservation area covering SE20, so permitted development under Class A applies as standard for most rear extensions.
Permitted development and Lawful Development Certificate process at Bromley
We submit a Lawful Development Certificate (£129, typically 6-8 weeks at Bromley) on every project for written confirmation of permitted development status. This protects the property at sale and avoids retrospective enforcement risk. Larger projects exceeding the 3-metre limit go through Bromley's Larger Home Extension prior approval process or full planning. 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. Glazing is FENSA-registered to U-value 1.4 W/m²K. Bifolds are typically Origin or Schüco aluminium; sliders are Sieger or IQ on premium projects. Roof construction is warm-roof with 150mm PIR insulation. Fixed-price contracts include structural engineer calculations, Building Control fees at Bromley, FENSA registration, party wall surveyor coordination, trial-hole investigation, Build Over Agreement where applicable, and the Lawful Development Certificate fee. The fixed price is confirmed after a free site visit. A Penge kitchen extension runs 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, and painting. One project manager from survey through handover, with photo updates throughout the build. Our office on Limes Avenue is five minutes from any SE20 property, with same-day surveys, 48-hour quote turnaround, and an immediate response if anything needs attention during the build.
Kitchen Extensions in Penge: What's Included
How I price kitchen extensions in Penge
I price every kitchen extensions job in Pengeafter 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
Penge
“Professional team, clear communication throughout. They handled everything including Building Control sign-off.”
Verified Customer
Penge
Frequently Asked Questions
- Why does groundwater matter on a Penge extension?
- Because the lower-lying streets sit at the bottom of the Crystal Palace ridge with higher persistent groundwater than the upper slopes. Strip foundations to Building Regulations Part A need to reach stable bearing strata below the active water table, typically 1.2-1.5 metres on saturated London Clay. Where the trial hole shows water seeping in faster than concrete can be placed, the trench needs pumping during pour or short bored piles instead of strip footings. The structural engineer specifies the foundation design from actual trial hole data rather than a generic estimate. We dig a trial hole at the survey on every Penge project.
- Do I need a Build Over Agreement for a Penge extension?
- Often yes. Many Penge terraces sit over public sewers running along the rear of the gardens, particularly the older streets near Penge High Street. Thames Water requires a Build Over Agreement before any new structure is built over or within 3 metres of a public sewer, which includes a CCTV survey of the existing sewer. The structural design typically includes a reinforced concrete lintel over the sewer to spread loading and a manhole access point if one isn't already present. We carry out the CCTV survey at the quote stage and handle the application as part of the project. The price is firm before the contract is signed.
- Why hire All Well for a Penge kitchen extension?
- Three reasons. First, location: our office is on Limes Avenue, SE20, 5 minutes from any Penge property. We know which streets have public sewers running along the rear gardens, where groundwater is highest, and which terraces share the same construction. 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 Build Over Agreement, party wall surveyor fees, trial-hole foundation reassessment, and any Larger Home Extension prior approval. 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.
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