Basement and cellar conversions · Pembroke Dock

Basement and cellar conversions in Pembroke Dock

Our basement and cellar conversions service covers Pembroke Dock and the rest of Dyfed. You get a fixed price in writing for the agreed specification, and one person co-ordinating the trades.

Covering Pembroke Dock

Our coverage around Pembroke Dock (SA72) also includes Haverfordwest, Tenby and Carmarthen.

Homes in Dyfed

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 is 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

What is the guide price for a basement conversion in Pembroke Dock?

Typical ranges for basement and cellar conversions. Ground conditions, access and specification move the final figure, which we fix in writing before work starts.

Basement and cellar conversionsGuide price incl. VAT
Existing cellar conversion£1,900 to £3,000 per m²
New basement excavation£4,200 to £6,600 per m²

What approvals does a basement conversion need in Wales?

Planning decisions in Wales are made by the local council, using permitted development rules set by the Welsh Government rather than England’s. Building regulations in Wales have their own approved documents, and the Party Wall etc. Act 1996 applies to work on shared walls and boundaries.

In Wales an existing cellar conversion usually does not need planning permission; new excavation and lightwells may.

What can change the price or programme?

  • Groundwater levels drive the waterproofing design and cost.
  • Headroom of about 2.1 m or more is needed, which may mean lowering the floor.

What happens after I enquire?

  1. Send us the details. Give us a postcode, a rough idea of size and some photos, by phone, form or the guide price tool.
  2. Free site visit. We measure up, look at access, drains and the structure, and talk through options and budget.
  3. Drawings, approvals, written quote. We prepare the design, apply for the approvals it needs, and give you a fixed price in writing.
  4. We build it. Work follows an agreed programme, with inspections at each stage and a final sign-off.

Your questions answered

How much does a basement conversion cost?

Converting an existing cellar costs about £1,900 to £3,000 per square metre including VAT. A new excavated basement is around £4,200 to £6,600 per square metre.

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.

Can you visit a house in Pembroke Dock to quote?

Yes. After a short call we arrange a site visit to measure up and agree what the design needs to do, then send a written price.

Other towns nearby

Learn more about basement and cellar conversions, or see every project we cover in Pembroke Dock.

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