South Wales

20+ Builders in Swansea

Local builders covering Swansea and surrounding areas. Also known as building contractors or construction firms. Real businesses, checked against public records. Free to browse.

36 verified builders · median 9 years trading · 4.8★ average across 224 Google reviews · 19 with website

Other trades in Swansea:
Builders nearby:
20
verified builders listed
15
Companies House registered
4.8★
avg Google rating
224
customer reviews combined

Browse builders in Swansea, South Wales. Every listing is sourced from public records and checked against Companies House and Google Business Profile. Ask for FMB or TrustMark credentials when choosing a builder, and verify them with the issuing body. All contact details are visible after a business claims its listing.

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20 businesses listed

Builder guides for Swansea

Builder costs in Swansea (2026 prices)
Real pricing data, job-type breakdowns and money-saving tips

Areas covered for builders in Swansea

Builders listed for Swansea typically cover the SA1, SA2, SA3, SA4, SA5, SA6, SA7, SA8 postcode areas and surrounding parts of South Wales. Service radius varies per business, many also work in adjacent towns and villages within the same postcode group.

SA1SA2SA3SA4SA5SA6SA7SA8

Including Swansea City Centre, St Thomas, Maritime Quarter, Sandfields, Brynmill, Uplands, Sketty, Killay, Tycoch, Mumbles, Oystermouth, Gower, Bishopston, Caswell, Langland, Llanelli East, Pontarddulais, Gorseinon, Loughor, Cwmbwrla, Manselton, Townhill, Fforestfach and Morriston.

Builders in nearby towns

Builder in NeathBuilder in Port TalbotBuilder in CarmarthenBuilder in LlanelliBuilder in AmmanfordBuilder in Pembroke

Common builders services in Swansea

Swansea covers everything from the Mumbles coastline to inland industrial Llansamlet, local trades typically specialise by area, with Gower (SA3) work often involving listed-building or AONB constraints. Building Regs sign-off goes through Swansea Council.

Listed builders in Swansea typically cover the following work. Scopes vary per business, request a free quote on any specific job above.

  • Internal wall removal (load-bearing)
  • House extensions (single and two-storey)
  • Conservatory and orangery installation
  • Damp and structural repairs
  • Renovations and refurbishments
  • Loft conversions (dormer, hip-to-gable, Velux)
  • New build construction
  • Garage conversions
  • Project management
  • Underpinning and foundation work

Not sure what FMB means or how to verify it? Read the plain-English definition →

Related guides

Swansea Builders

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Swansea Electricians

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Swansea Gas Engineers

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Swansea Groundworks

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Before you hire, Welsh regulations to know

Pre-hire checklist, verifying any Welsh tradesperson

Read guide →

TrustMark, FMB & builder vetting in Wales

Read guide →

Welsh Building Regulations 2026, extensions, conversions, council fees

Read guide →

Builders near Swansea

Builder in CardiffBuilder in NewportBuilder in CaerphillyBuilder in BarryBuilder in BridgendBuilder in NeathBuilder in Port TalbotBuilder in Pontypridd

Other trades in Swansea

PlumbersElectriciansRoofersPainters & DecoratorsHVAC & HeatingJoiners & CarpentersDecoratorsGas EngineersGroundworksDamp Proofing

Looking wider? Browse all builders across South Wales: covers Cardiff, Swansea, Newport, Barry and 15+ more towns.

Common questions about builders in Swansea

How much do builders charge in Swansea?+

Builder costs in Swansea vary by job type and complexity. For an accurate quote, request a free estimate from a listed business above. Most builders offer free site visits before quoting.

What accreditations should a builder in Swansea have?+

Reputable builders in Swansea should hold relevant accreditations such as FMB · TrustMark · NHBC. We do not verify accreditation body membership, so always ask to see credentials and check them against the issuing body's own register before hiring.

How do I find a reliable builder in Swansea?+

Browse the builders listed above, each has been added from public records and verified sources. Look for the Verified or Premium badge, check their accreditations, and read any reviews shown on their profile.

How quickly can I get a builder in Swansea?+

Response times vary. For routine work, most builders in Swansea can schedule within a few days. For urgent or emergency work, contact businesses directly, some offer same-day or 24/7 callouts.

Are builders in Swansea regulated?+

Yes. Depending on the trade, builders in Wales must comply with UK building regulations and may require registration with bodies such as FMB · TrustMark · NHBC. Always confirm a tradesperson's credentials before work begins.

Do builders in Swansea cover surrounding areas?+

Most builders listed for Swansea also cover nearby towns in South Wales. Service radius varies, check each business profile for their declared coverage area, or use the "Builders nearby" chips at the top of this page to browse adjacent towns directly.

Is it free to use besttrades.wales to find a builder?+

Yes, completely free for homeowners. No booking fees, no sign-up required to browse listings or request quotes. Tradespeople pay nothing to claim their listing either. besttrades.wales is an independent Welsh trade directory, not a paid lead-resale service.

How is a builder on besttrades.wales verified?+

Every listing is cross-checked against public records: Google Business Profile for review history and location, and Companies House for active registration where applicable. We do not check accreditation body membership — ask the business for its registration number and verify it on the issuing body's own register.

All trades in Swansea →·Builders regulations guide·Best builders in Swansea

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