Builders in SW20
Raynes Park & West Wimbledon · South West London
Building and renovation in SW20
SW20 covers Raynes Park, West Wimbledon, Cottenham Park, Coombe Lane, Grand Drive. Inter-war semis and detached houses dominate, with Edwardian villas around Cottenham Park and a smaller stock of Victorian cottages near the station.
Planning and consent in SW20
Merton's Cottenham Park and Durham Road conservation areas carry controls; elsewhere large rear extensions and loft conversions are usual. Low-lying ground near the Beverley Brook needs a flood-risk check.
Access and site logistics
Generous suburban plots with driveways, easier skip placement and good side access on semis; the railway level crossings and Coombe Lane traffic affect delivery timing.
What we are usually asked for here
- Double-storey and wraparound rear extensions
- Hip-to-gable loft conversions
- Cellar and garden-level waterproofing near Beverley Brook
- Full refurbishment of inter-war houses
We survey the property before pricing, confirm the constraints that apply to your specific address rather than the postcode, and issue a fixed price against a written scope. One site manager runs the trades from first fix to snagging.
District at a glance
- Postcode district
- SW20
- Main localities
- Raynes Park, West Wimbledon, Cottenham Park
- London region
- South West London
- Response time
- Site visit typically within 5 working days
Services we provide in SW20
Loft conversions
Turn dead roof space into the best room in the house
Read more →House extensions
Rear, side-return, wrap-around and double-storey extensions
Read more →Home renovations
Whole-house refurbishment, stripped back and rebuilt properly
Read more →Kitchen renovations
Bespoke and designer kitchens, installed by one team
Read more →Bathroom renovations
Waterproofed properly, finished beautifully
Read more →Basement conversions
Dig-outs, tanking and habitable lower-ground space
Read more →Indoor swimming pools
Tanked, heated and environmentally controlled pool halls
Read more →Outdoor swimming pools
Concrete tanks, heating, covers and landscaped surrounds
Read more →Garden design
Terraces, planting, lighting and outdoor rooms
Read more →Landscaping
Hard and soft landscaping, levels, walls and drainage
Read more →Commercial construction
Refurbishment and fit-out delivered around your trading hours
Read more →Shop fit outs
Shopfronts, signage and retail fit-out that opens on time
Read more →Plumbing
Full re-pipes, bathroom services, boilers and hot water systems
Read more →Electrical
Rewires, consumer units, lighting design and certification
Read more →Carpentry
Bespoke joinery, wardrobes, staircases and structural carpentry
Read more →Basement waterproofing in SW20
Raynes Park and West Wimbledon inter-war houses rarely have cellars, but garden-level rooms and new basements near the Beverley Brook face a high winter water table.
New basements are designed with a waterproof concrete structure and an internal Type C cavity drain membrane, drainage channels and twin pumps. For existing damp lower rooms we use membrane dry-lining and external drainage improvements.
A Type C cavity drain system in SW20 is specified after a survey, designed to BS 8102 for the way you intend to use the room, and installed with the drainage channel, sump and pumps left accessible for maintenance. Read the full basement waterproofing and Type C cavity drain guide, or see how it fits into a basement and cellar conversion.
Waterproofing or damp proofing in SW20?
Damp proofing deals with moisture in above-ground walls. Waterproofing protects a room that sits below ground against water pressure from outside. In Raynes Park & West Wimbledon we decide which one the property needs at the survey, and often the answer is an external repair first.
How a SW20 quotation works
We visit, find the source of the water, check head height, drainage outfall and any lease or listed-building constraints on your address, then issue a written scope and fixed price covering membrane, channel, sump and pumps and the finished room.