Builders in Wales
61 practices covering Wales. Listings are business information researched by Renovome; contact details and matching happen inside Workspace.
A••• L•••• P••••••• a••
Powys plumbing and heating service providing domestic general plumbing, maintenance and emergency work.
A•••••• F•••••••
Mid Wales flooring specialist providing domestic flooring products and fitting services.
A••••••• T••• C•••••• L••
North Wales company undertaking domestic soft and hard landscaping, fencing, decking, patios and turfing.
C• W••••••
North Wales installer of replacement windows, doors, glazing and warm-roof systems.
C••• L••• W•••••• &•
North Wales company supplying and fitting domestic uPVC, composite and aluminium windows and doors.
C••••• L•••••••• N•
Wrexham landscaping company undertaking domestic fencing, gates, decking and pergola installations.
D••••••••
North Wales workshop making and fitting bespoke timber doors, windows and gates for homeowners.
E•••• P••••••• &• H••••••
Mid Wales plumbing and heating business undertaking domestic plumbing, boiler work, servicing and emergency repairs.
E•••• W••••••
Mid Wales home-improvement company installing windows, doors, roofline and warm-roof systems.
F••• E•••••••• S•••••••
Brecon electrical service undertaking domestic sockets, lighting, fault finding, fuse-board work and rewires.
G•••••• G••••• S•••••••
Bangor landscape gardening company undertaking domestic landscaping, fencing, decking, patios and turfing.
H•••• 2• H••• I••••••••
North Wales home-improvement service undertaking decorating, general household jobs and garden work.
H••••• E•••••••• (•••••• L••••••
Powys electrical contractor undertaking residential installation, inspection, testing and maintenance work.
I• O•• N••••• W••••••••
Snowdonia-based joinery business making bespoke windows, doors, kitchens, staircases and furniture for homes.
I••••••• W•••••• N•••• W••••
North Wales domestic installer of uPVC windows, doors and roofline products.
J•• L••••••••
North Wales landscaping and groundworks company undertaking domestic paving, fencing and garden projects.
L•••••••• J••••••
North Wales joinery business manufacturing bespoke domestic windows, doors, furniture and staircases.
M• &• S•• R••••••
Pembrokeshire roofing company undertaking flat roofs, slate work, leadwork and roof refurbishment.
M• G• R••••••
North Wales roofing company undertaking slating, tiling, flat roofing, leadwork and roofline work.
M• H••••••• S•••••••
North Wales handyman service undertaking joinery, decorating, window and door repairs, fencing, patios and general small repairs.
M• P•• t•• P••••••
Mid Wales plumbing and heating business handling domestic leaks, bathrooms, kitchens, heating systems and maintenance.
N•• S••••••••
North Wales surface contractor undertaking domestic carpet and vinyl flooring, patios, paving and landscaping.
N•••• W•••• R•••••• L••
North Wales roofing company undertaking domestic roofing work and repairs.
N•••• W•••• R•••••• S•••••••
Abergele-based roofing service covering North Wales.
P• J•••• L••••••••
North Wales landscaping company undertaking garden makeovers, patios and fencing.
R• D• J•••••• &•
Long-established North Wales family company installing domestic windows and doors.
T••• R•••••• a•• S••
North Wales home-improvement company undertaking windows and doors, roof and gutter work, landscaping, patios and driveways.
T•••••• P••••••• M••••••••
Domestic trade and property maintenance business serving Swansea and surrounding South Wales areas.
W••••••••
Anglesey installer of windows, doors, conservatories, fascias and guttering.
A• C•••••••• W••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in South Wales.
A• D•••••••• N•••• W••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Anglesey / North Wales.
A••• C•••••••• W••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Abergavenny / South Wales.
A•••• B••••••• S•••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in South Wales.
C• B••••••• L••
Residential building contractor serving Wrexham, Wales.
C•• C•••••••• L••
Residential building contractor serving Swansea, Wales.
C••••••• B•••••••
Residential building contractor serving Colwyn Bay and North Wales.
C••••••• B••••••• S•••••••
Residential building contractor serving Swansea and Ystradgynlais, Wales.
D•••• P•••• B•••••••
Residential building contractor serving Dinas Powys and the Vale of Glamorgan, Wales.
G• M•••••• J•••• B•••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Gwynedd / North Wales.
G•• B••••••• L••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in South Wales.
G••••• A• J••••
Residential building contractor serving Swansea and Mumbles, Wales.
G•••••• H••••• D••••••••
Residential building contractor serving St Asaph and North Wales.
H•• D••••••••
Residential building contractor serving Bridgend, Wales.
I•• M•••••••• G•••••• B••••••
Residential building contractor serving Carmarthenshire, Wales.
J• C•••••••• N•••• W••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Anglesey / North Wales.
J•• C•••••••• &• P•••••••
Residential building contractor serving Bridgend, Wales.
L•• B••••••• L••
Residential building contractor serving Pembrokeshire, Wales.
L••• P••••••• D••••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in South Wales.
L•••• B••••••• C••••••••
Residential building contractor serving Denbighshire and North Wales.
M•• C••••••••
Residential building contractor serving Pembrokeshire, Wales.
O••••••• L••••• L•••••••• L•••••
UK residential builder or main contractor undertaking home extensions, renovations, refurbishments, conversions, new builds or related works in Barry / South Wales.
P•• A••• G••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Swansea / South Wales.
P•••••• O•• D••••• a••
UK residential builder or main contractor undertaking home extensions, renovations, refurbishments, conversions, new builds or related works in Penarth / South Wales.
R•••• E•••• B••••••• C••••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Swansea / South Wales.
S• B•••••••
Residential building contractor serving North Wales.
T•• B•••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in North Wales.
T•• D••••• B••••••• C••••••••
Residential building contractor serving Pembrokeshire, Wales.
T••••• D••••••••
UK residential builder or main contractor undertaking home extensions, renovations, refurbishments, conversions, new builds or related works in South Wales.
W•• E•••• &• S•••
Residential building contractor serving Pembrokeshire, Wales.
W•••• C••••••••
Residential building contractor serving Vale of Glamorgan, Wales.
W•••••• B•••••••
Residential building contractor serving Wrexham, Wales.
How to choose a builder in Wales
You appoint a builder once the scope is defined. If you invite builders before the drawings and specification are settled, every quote prices a different job and you cannot compare them.
- Give every builder the same drawings, specification and programme, then compare line by line.
- Check the company at Companies House, and ask how long the team has worked together.
- Visit a current site, not just a finished photo.
- Ask for public liability insurance and, where relevant, a warranty or guarantee.
- Agree a payment schedule tied to stages completed, never a large payment up front.
What builders in Wales typically work on
- Single and two-storey extensions
- Loft conversions and garage conversions
- Kitchen and bathroom refits
- Structural openings and knock-throughs
- Whole-house refurbishments
Typical 2026 fees for builders
| Item | Typical 2026 cost |
|---|---|
| Extension shell, per square metre | £2,300 - £3,400 |
| Single-storey rear extension, 20 sq m | £52,000 - £86,000 |
| Loft conversion, rear dormer | £48,000 - £78,000 |
| Structural opening with flush beam | £4,500 - £12,000 |
| Day rate, two-person team | £380 - £620 |
Indicative 2026 UK ranges, not quotations. London and the South East usually sit at the top of each range. Last reviewed: September 2026.
Common questions
- How many builders should I ask to quote?
- Three is enough, provided all three price the same written scope. More quotes on a vague brief produce a wider spread, not better information.
- Why do quotes for the same job differ so much?
- Usually because they include different work. Compare the inclusions, exclusions and provisional sums before you compare the totals.
Read next
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