We design, plan and build house extensions across Raynes Park and the wider Merton borough — one team, one fixed price, one project manager from sketch to handover.
Raynes Park feels like a quiet suburb — streets lined with Victorian and Edwardian terraces and semi-detached houses. Infill houses from the 1930s onward complete the mix. Families often choose to improve rather than move.
Side-return and rear kitchen extensions are very popular here, especially on narrow plots. Two-storey wrap-around projects add bedrooms and living space in one go.
Our Raynes Park portfolio includes side-return extensions with roof lights, a two-storey wrap-around extension and a dormer conversion for a growing family.
Planning drawings, building-regulations and party-wall paperwork are prepared and submitted by our own team — including for conservation-area or listed properties where extra consent is needed. One point of contact owns both the approvals and the build, so nothing falls between an architect and a separate contractor.
No subcontractor juggling. From the first sketch through structural engineering to final snagging, your project moves through people who all sit in the same office and answer to the same project manager.
You pay in stages, only after each stage is signed off. Variations only happen when scope genuinely changes — and they go through written authorisation, never a verbal "while we are at it".
extensions Side-return rear extension on a Victorian terrace, opening up the kitchen and dining space onto the garden.
extensions One of our recent Surrey project involved large double storey side and rear house extension, creating a spacious open plan kitchen, snug, and dining area with massive sliding and bifold door.
extensions This project in Surbiton, London involved a hip-to-gable loft conversion to add two new bedrooms and a bathroom with a walk-in shower. We also completed a ground floor remodel, including a rear extension with a modern ki
Yes — Raynes Park (SW20) is well within our Merton working area. We typically deliver several house extensions projects across this borough each year.
End-to-end (consultation → handover) usually 12–22 weeks. Build phase alone is shorter — most house extensions sites complete in 8–18 weeks depending on scope and finishes.
Typical range: From £2,500 / m². Our online calculator gives you a tighter figure based on your house type and ambitions; the fixed quote follows a free site visit.
It depends on the property. Many house extensions fall under permitted development, especially in Merton. Where planning is needed (conservation areas, listed properties, larger schemes), we handle the application end-to-end.
Many extensions fall under permitted development. We assess your property and tell you exactly what you need on the first visit.
A single-storey extension takes 12–16 weeks from breaking ground to completion. Double-storey runs 16–22 weeks.
For most rear extensions, yes. We dust-seal the working area and maintain access to your kitchen and bathroom.
Free 2-minute calculator + a fixed-price quote within one working day after a site visit
