Basement Conversions in Wimbledon, SW19
Cellar and basement conversions in Wimbledon: dry, habitable rooms below ground with designed waterproofing, natural light and building control approval.
Covered under one contract
- Structural design and calculations
- Planning or lawful development certificate
- New staircase, dormer and roof windows
- Insulation, fire safety and building control
- En-suite designed and fitted
- Waterproofing with guarantee for basements
Basement Conversions in Wimbledon.
Where a house cannot grow outwards or upwards, it can grow downwards. Many of the older houses in Wimbledon already have a cellar or vaults, and converting them into a usable floor is a well-established route to a utility room, guest suite, study or cinema room.
The two things that decide whether a basement works are waterproofing and light. We use a designed system, normally a cavity drainage membrane with a sump and pump, which carries a guarantee, and we bring light in through a lightwell or a rear opening where the site allows. Ceiling height, drainage and structure are all surveyed at the outset.
Converting an existing cellar without changing the exterior of the house does not usually need planning permission. Lightwells, listed buildings and new excavation do, and the central London boroughs have their own basement policies with impact assessments. All basements need building regulations approval and most involve party wall notices, which we prepare and serve.
- Area
- Wimbledon, SW19 · SW20
- Council
- London Borough of Merton
- Housing
- Large Victorian and Edwardian houses around the village and the Common, detached houses on the Parkside estates, Edwardian terraces towards the town, Merton Park garden suburb
- Transport
- Wimbledon, Wimbledon Park (District, rail)
- Basement, existing cellar
- 10 to 16 weeks
- Consent
- Often permitted development for lofts
- Waterproofing
- Guaranteed system, designed for the site
Wimbledon: the houses and the planning rules.
Wimbledon divides into the village on the hill beside the Common, with its Georgian and Victorian houses and some of the largest private homes in south London, and the town below it, with Edwardian terraces and semis running down to the station. Between them are the Parkside roads of detached houses that attract owners with substantial budgets.
Projects here range from complete refurbishments of village houses, with basements and garden rooms, to extensions and lofts on the Edwardian streets. Merton's conservation guidance applies in the village and around the Common; elsewhere permitted development covers much of what owners want to do.
The Wimbledon Village, Wimbledon North and Merton Park conservation areas cover the village, the common edge and the garden suburb; most other streets are unrestricted.
London Borough of Merton
Merton decides applications. Within the Wimbledon Village and North conservation areas, roof changes and rear extensions need a full application; outside them permitted development often applies.
Large houses
Basements, pool houses and garden buildings on the larger plots need a householder application and, near the Common, careful attention to trees.
Merton Park
The garden suburb has Article 4 directions and specific guidance on hedges, windows and extensions.
Approvals for basement conversions in Wimbledon.
Converting an existing cellar without altering the exterior does not usually need planning permission; lightwells, listed buildings and new excavation do. Every basement needs building regulations approval and a designed waterproofing system, and most involve party wall notices.
Merton decides applications. Within the Wimbledon Village and North conservation areas, roof changes and rear extensions need a full application; outside them permitted development often applies.
What basement conversions in Wimbledon includes.
- Structural design and calculations
- Planning or lawful development certificate
- New staircase, dormer and roof windows
- Insulation, fire safety and building control
- En-suite designed and fitted
- Waterproofing with guarantee for basements
From site visit to handover.
- 01
Site visit & consultation
We visit, listen and measure. Brief, budget and constraints understood before any advice is given.
- 02
Design & itemised quote
Our architects and engineers draw the scheme, and from that we provide a transparent, itemised quotation for your approval.
- 03
Planning & approvals
Planning applications, building control and party wall matters handled for you.
- 04
Build, managed weekly
Our own trades, sequenced by a site manager. Progress reported every week.
- 05
Handover & aftercare
Joint snagging walk-through, documentation, and a guarantee on our workmanship.
Basement Conversions in Wimbledon: your questions.
Can I convert a cellar in Wimbledon?
Usually. Converting an existing cellar without changing the outside of the house does not normally need planning permission. Lightwells, listed buildings and new excavation do, and every basement needs building regulations approval.
How do you keep a converted basement dry?
With a designed waterproofing system, typically a cavity drainage membrane with a sump and pump, or tanking where appropriate. It carries a guarantee and is designed for the ground conditions found on site.
Which parts of Wimbledon do you cover?
All of Wimbledon and SW19 · SW20, including Parkside, Church Road, Lancaster Road, Marryat Road, Ridgway, Murray Road, and the neighbouring districts. We are based in London and our teams work across central, north, north-west, west and south-west London.
Other services in Wimbledon.
House Refurbishment in Wimbledon
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Flat Refurbishment in Wimbledon
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House Extensions in Wimbledon
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Structural Alterations in Wimbledon
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Loft Conversions in Wimbledon
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Kitchen Renovation in Wimbledon
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Bathroom Renovation in Wimbledon
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Bespoke Joinery & Fitted Furniture in Wimbledon
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Architectural & Interior Design in Wimbledon
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Planning Permission & Building Regulations in Wimbledon
Read moreBasement Conversions across London.
Central London
All of Central LondonNorth London
All of North LondonNorth-West London
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All of South-West LondonTalk to us about a basement conversion in Wimbledon.
We will visit, listen and explain what is possible for your property and how it would be approved. No pressure, no sales pitch.