Basement Conversions in Hammersmith, W6
Cellar and basement conversions in Hammersmith: 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 Hammersmith.
Where a house cannot grow outwards or upwards, it can grow downwards. Many of the older houses in Hammersmith 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
- Hammersmith, W6
- Council
- London Borough of Hammersmith and Fulham
- Housing
- Victorian terraces in Brackenbury Village and around Ravenscourt Park, riverside houses along the Mall, mansion flats and new apartments
- Transport
- Hammersmith, Ravenscourt Park, Goldhawk Road
- Basement, existing cellar
- 10 to 16 weeks
- Consent
- Often permitted development for lofts
- Waterproofing
- Guaranteed system, designed for the site
Hammersmith: the houses and the planning rules.
Away from the Broadway, Hammersmith is a district of tight Victorian terraces: Brackenbury Village's two-storey cottages, the larger houses around Ravenscourt Park, and the Georgian and Victorian houses along the river at the Mall. The terraces are narrow, the gardens are short and the demand for space is constant.
Side-return extensions are the signature project here, opening the ground floor into one kitchen and living space, often with a loft conversion in the same programme. The conservation areas ask for extensions that sit below the neighbours' sightlines and use matching brick.
The Brackenbury Village, Ravenscourt and Starch Green, and Hammersmith Mall conservation areas cover much of the residential district.
London Borough of Hammersmith and Fulham
The borough decides applications and applies Article 4 directions in Brackenbury Village and other conservation areas, removing permitted development for rear and roof extensions.
Side returns
The council's guidance favours side-return extensions kept low with rooflights; full-width rear extensions are assessed against neighbours' amenity.
Basements
The borough's basement policy applies, with a construction method statement and limits on depth and garden coverage.
Approvals for basement conversions in Hammersmith.
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.
The borough decides applications and applies Article 4 directions in Brackenbury Village and other conservation areas, removing permitted development for rear and roof extensions.
What basement conversions in Hammersmith 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 Hammersmith: your questions.
Can I convert a cellar in Hammersmith?
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 Hammersmith do you cover?
All of Hammersmith and W6, including Brackenbury Road, Ravenscourt Road, Upper Mall, Hammersmith Grove, Dalling Road, Rylett Road, and the neighbouring districts. We are based in London and our teams work across central, north, north-west, west and south-west London.
Our work near Hammersmith.
Other services in Hammersmith.
House Refurbishment in Hammersmith
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Flat Refurbishment in Hammersmith
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House Extensions in Hammersmith
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Structural Alterations in Hammersmith
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Loft Conversions in Hammersmith
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Kitchen Renovation in Hammersmith
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Bathroom Renovation in Hammersmith
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Bespoke Joinery & Fitted Furniture in Hammersmith
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Architectural & Interior Design in Hammersmith
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Planning Permission & Building Regulations in Hammersmith
Read moreBasement Conversions across London.
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All of West LondonTalk to us about a basement conversion in Hammersmith.
We will visit, listen and explain what is possible for your property and how it would be approved. No pressure, no sales pitch.