Covering Chepstow
Our coverage around Chepstow (NP16) also includes Portishead (12 miles to the south) and Monmouth.
Homes in Gwent
Housing in Wales ranges from terraced streets in the valleys and older industrial towns to stone-built homes in rural areas and modern estates around the cities.
What do you get with a basement conversion?
A basement conversion turns an existing cellar into dry, usable rooms, or excavates a new basement under a house. Converting an existing cellar is far simpler and cheaper than digging a new one, and often does not need planning permission.
- Planning and building regulations checks under Welsh rules
- Waterproofing design and installation
- Ventilation, heating and electrics
How much should I budget for a basement conversion?
Guide prices for basement and cellar conversions, including VAT where it applies. Your fixed price is confirmed in writing after the survey.
| 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 |
Planning and building rules in Chepstow
Welsh projects need planning clearance from the council under Welsh rules, building regulations approval under the Welsh approved documents, and party wall notices where the work affects a neighbour’s wall or foundations.
In Wales an existing cellar conversion usually does not need planning permission; new excavation and lightwells may.
What should I think about before starting?
- Groundwater levels drive the waterproofing design and cost.
- A pump for the drainage system needs a battery back-up.
What happens after I enquire?
- Start with a conversation. A short call or the online form is enough for us to understand what you want to build.
- Free site visit. We measure up, look at access, drains and the structure, and talk through options and budget.
- Drawings, approvals, written quote. We prepare the design, apply for the approvals it needs, and give you a fixed price in writing.
- Build and hand over. Our teams build to the programme, building control inspects, and you get the completion paperwork at the end.
What people ask before starting
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.
Who deals with the council for a project in Chepstow?
We do. We prepare the drawings, submit planning or permitted development paperwork if needed, and arrange building control inspections.
Basement and cellar conversions in nearby towns
- Basement and cellar conversions in Portishead
- Basement and cellar conversions in Monmouth
- Basement and cellar conversions in Yate
- Basement and cellar conversions in Newport
Learn more about basement and cellar conversions, or see every project we cover in Chepstow.