How much does a Builder cost in Wales?
Typical costs for hiring a builder anywhere in Wales. Builders pricing is largely consistent across the UK, so the figures below are indicative national ranges. Your actual quote depends on job size, access and materials, so always get 2–3 quotes. Ranges reflect published 2024–25 UK trade-pricing guides.
Builders in Wales: what our directory holds
Where they are: South Wales 391 · North Wales 149 · West Wales 48 · Mid Wales 40
Counted from businesses listed on besttrades.wales, not a survey of the whole market — there are builders in Wales we have not listed yet. Supply affects price: in a region with few available builders, quotes sit toward the top of the ranges below.
Builder price guide, Wales (2026)
| Job type | Price range | Notes |
|---|---|---|
| Day Rate | £150 – £250/day | Per labourer |
| Single Storey Extension | £20000 – £50000 | Depends on size/spec |
| Loft Conversion | £25000 – £60000 | |
| Garage Conversion | £8000 – £20000 | |
| New Build Per M2 | £1500 – £3000/m² |
Prices updated 2026-08-16. Actual quotes may vary by job complexity and contractor.
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Frequently asked questions
How much does a single-storey extension cost?
Typically £20,000–£50,000 depending on size, finish and groundworks. Get an FMB or TrustMark builder and a written spec.
How much does a loft conversion cost?
Usually £25,000–£60,000 for a dormer loft, including stairs, insulation and building control.
Do I need planning permission?
Many extensions fall under permitted development, but always check with your local Welsh council first.