Covering Merseyside
Our basement and cellar conversions service in Merseyside covers Liverpool, Birkenhead, St Helens and Southport and more.
Homes in the North West
The North West has long rows of Victorian terraced houses in its towns and cities, alongside inter-war semis and post-war estates, so rear extensions, dormer lofts and kitchen extensions are common projects.
What goes into a basement conversion?
Everything below ground depends on keeping water out. We design the waterproofing system (usually a cavity drain membrane with a pump, or tanking) to the relevant British Standard guidance, then add insulation, ventilation, light and an escape route. New basements involve underpinning and a party wall process and are designed with a structural engineer.
- Damp and structural survey
- Waterproofing design and installation
- Lightwells and windows for daylight and escape
How much should I budget for a basement conversion?
What basement and cellar conversions typically cost. These are guide ranges; the written quote for your house replaces them.
| Basement and cellar conversions | Guide price incl. VAT |
|---|---|
| Existing cellar conversion | £1,900 to £3,000 per m² |
| New basement excavation | £4,200 to £6,600 per m² |
How is a basement conversion approved in Merseyside?
Projects in England go through two separate checks. Planning (or confirmation that the work is permitted development) comes from the district, borough or unitary council, and building regulations approval comes from the council’s building control team or a registered building control approver. Where work touches a shared wall or digs near a neighbour’s foundations, the Party Wall etc. Act 1996 applies.
Converting an existing cellar with no external changes usually does not need planning permission in England. Digging a new basement or adding a lightwell often does, and many councils have basement policies.
What can change the price or programme?
- Groundwater levels drive the waterproofing design and cost.
- New basements nearly always involve the Party Wall Act in England and Wales.
How does the project run?
- Tell us about the project. Call, use the guide price tool or send the form with a few photos and a postcode.
- Survey at your house. We look at the existing structure, services and access, and agree what the design needs to achieve.
- Price and paperwork. The design is priced line by line, and we submit the planning and building control applications.
- Construction and completion. One site lead co-ordinates every trade through to the building control certificate.
Your questions answered
How do you keep a basement dry?
With a designed waterproofing system, usually a cavity drain membrane draining to a pump, sometimes combined with tanking.
Will my neighbours be affected?
New basements usually need party wall agreements. We handle the notices and surveyors.
How do I get a price for basement and cellar conversions in Merseyside?
Use the guide price tool for a ballpark figure, then book a visit for a fixed written price for the agreed specification.
Basement and cellar conversions near Merseyside
- Basement and cellar conversions in Liverpool
- Basement and cellar conversions in Birkenhead
- Basement and cellar conversions in St Helens
- Basement and cellar conversions in Southport
- Basement and cellar conversions in Wallasey
- Basement and cellar conversions in Bootle
- Basement and cellar conversions in Bebington
- Basement and cellar conversions in Huyton
- Basement and cellar conversions in Kirkby
- Basement and cellar conversions in Prescot
- Basement and cellar conversions in Heswall
- Basement and cellar conversions in Maghull
- Basement and cellar conversions in Newton-le-Willows
- Basement and cellar conversions in Formby
- Basement and cellar conversions in Litherland
- Basement and cellar conversions in Speke
- Basement and cellar conversions in Garston
Learn more about basement and cellar conversions, or see every project we cover in Merseyside.