Basement Conversions in Putney, SW15
Cellar and basement conversions in Putney: 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 Putney.
Where a house cannot grow outwards or upwards, it can grow downwards. Many of the older houses in Putney 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
- Putney, SW15
- Council
- London Borough of Wandsworth
- Housing
- Victorian and Edwardian terraces and semis, large houses on West Hill and by Putney Heath, mansion flats and riverside apartments
- Transport
- Putney Bridge, East Putney (District), Putney (rail)
- Basement, existing cellar
- 10 to 16 weeks
- Consent
- Often permitted development for lofts
- Waterproofing
- Guaranteed system, designed for the site
Putney: the houses and the planning rules.
Putney rises from the river to the Heath through streets of Victorian and Edwardian houses, with mansion flats near the bridge, larger houses on West Hill and around the Heath, and the Dover House garden estate to the west. It is a family district with good schools, and the houses are extended accordingly.
Side-return and rear extensions, loft conversions and full refurbishments are the everyday projects, and on the larger West Hill and Heath-side plots we see double-storey extensions and basements. Wandsworth's guidance is clear and the council decides quickly when the drawings are complete.
The Putney Embankment, West Putney and Dover House Estate conservation areas cover parts of the district; many streets are unrestricted.
London Borough of Wandsworth
Wandsworth decides applications and publishes a house extension design guide; outside the conservation areas permitted development covers many rear extensions and lofts.
Basements
The borough's basement policy requires a construction method statement and limits new basements to a single storey under part of the garden.
Dover House estate
The garden estate has Article 4 directions and guidance on windows, roofs and extensions.
Approvals for basement conversions in Putney.
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.
Wandsworth decides applications and publishes a house extension design guide; outside the conservation areas permitted development covers many rear extensions and lofts.
What basement conversions in Putney 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 Putney: your questions.
Can I convert a cellar in Putney?
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 Putney do you cover?
All of Putney and SW15, including West Hill, Putney Hill, Lower Richmond Road, Deodar Road, Howards Lane, Ravenna 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 Putney.
House Refurbishment in Putney
Read more
Flat Refurbishment in Putney
Read more
House Extensions in Putney
Read more
Structural Alterations in Putney
Read more
Loft Conversions in Putney
Read more
Kitchen Renovation in Putney
Read more
Bathroom Renovation in Putney
Read more
Bespoke Joinery & Fitted Furniture in Putney
Read more
Architectural & Interior Design in Putney
Read more
Planning Permission & Building Regulations in Putney
Read moreBasement Conversions across London.
Central London
All of Central LondonNorth London
All of North LondonNorth-West London
All of North-West LondonSouth-West London
All of South-West LondonTalk to us about a basement conversion in Putney.
We will visit, listen and explain what is possible for your property and how it would be approved. No pressure, no sales pitch.