Top 50 Construction Companies in Cardiff (2026)

Cardiff’s skyline and neighbourhoods are constantly evolving — from heritage homes in Roath to new‑build developments around Cardiff Bay. That growth means a competitive construction scene, so finding the right team — one that gets your brief, manages timelines, and keeps quality high — is essential. Below you’ll find 15 trusted local companies (of 50 total in the full guide), each with a clear niche, what they’re best at, and how they can help bring your project to life — whether you’re renovating a kitchen or delivering a new workspace.

Top 50 Construction Companies in Cardiff

1. AJW Construction Ltd

Best for: Bespoke residential builds & practical renovations

AJW Construction has built a strong reputation in Cathays and beyond for combining hands‑on care with dependable delivery. They’re often recommended by Cardiff homeowners for projects where quality matters and careful planning makes all the difference. They’ll talk through your ideas before work begins and pride themselves on neat finishes.
Services

• General building & renovations

• Extensions & garage conversions

• Planning support

• Property refurbishments

Contact: 40A Richards St, Cathays, Cardiff CF24 4DA
Phone: 02920 221 823

2. Chapman Construction Cardiff

Best for: Family‑run building services & extensions

With over four decades of experience, this local, family business focuses on residential builds that require craft skills — from loft conversions to tailored carpentry. Clients love the personalised touch and the willingness to stay involved from initial design through completion.
Services

• Loft conversions

• Extensions

• Kitchen & garden carpentry

• Full general building work

Contact: 11 Gorse Place, Fairwater, Cardiff CF5 3HP
Phone: 07968 018462

3. IB Contractors Ltd

Best for: Full design‑and‑build projects

IB Contractors blends project oversight with hands‑on tradesmanship. Based on Sloper Road, they’re a go‑to choice when you need an experienced team leading everything from early planning to finishing touches. They pride themselves on clear communication and steady progress reporting.
Services

• Construction management

• Building maintenance

• Renovations & remodels

• Custom build solutions

Contact: Sloper Rd, Cardiff CF11 8AB
Phone: 02920 839135

4. Encon Construction

Best for: Civil engineering & commercial projects

A steadier choice for larger builds that combine construction with civil engineering (think groundwork, site prep and larger infrastructure). They’re known across Cardiff for tackling challenging jobs and smooth coordination with subcontractors.
Services

• Civil engineering

• Commercial construction

• Site coordination

• Project delivery

Contact: Unit 10 Deryn Court, Wharfedale Road, Cardiff CF23 7HB
Phone: 029 2073 5111

5. Hector Construction

Best for: Local contractor with adaptable service range

Hector Construction offers broad skills suitable for small commercial refurbishments or home projects — ideal if your needs are diverse but you value a contractor who listens. Their base in Sandringham Road gives them great reach across central Cardiff.
Services

• Building works

• Renovations

• Site adaptations

• Maintenance support

Contact: 28 Sandringham Road, Cardiff CF23 5BJ
Phone: 029 2049 4422

6. Dragon Construction

Best for: Mid‑sized builds & residential upgrades

Known by locals for reliability and attention to detail, Dragon Construction handle projects from structural work to internal refurbishment. They’re often recommended through word‑of‑mouth for quality job management.
Services

• Structural work

• Internal remodelling

• Project oversights

• Finish detailing

Contact: 1 The Stone Yard, Ninian Park Road, Cardiff CF11 6HE
Phone: 07812 524338

7. Atlantic Construction

Best for: Trusted renovations & small builds

Atlantic Construction earns praise for friendly service and solid execution on residential jobs of all sizes. Homeowners often highlight their clear estimates and flexible scheduling.
Services

• Home renovations

• Structural improvements

• Build coordination

• Client planning support

Contact: 212 St Fagans Road, Cardiff CF5 3EW
Phone: 02920 562091

8. Investment Construction Ltd

Best for: Urban residential & mixed‑use builds

A Cardiff firm with a reputation for reliability on mid‑sized projects. They balance technical know‑how with customer care, making them a choice when you want both confidence and clarity.
Services

• Construction projects

• Renovations

• Structural updates

• Project guidance

Contact: 66 Albany Road, Cardiff CF24 3RR
Phone: 02920 574732

9. L C B Construction

Best for: Responsive, neighbourhood‑focused builds

L C B Construction stands out for tackling local jobs — everything from practical property upgrades to comprehensive builds — while keeping communication transparent throughout.
Services

• Building work

• Site organisation

• Refurbishments

• Bespoke home jobs

Contact: Unit 10 Stuart Close, Cardiff CF11 8EE
Phone: 01446 737386

10. A T H Building Contractors

Best for: Traditional contractor with wide experience

ATH has built its reputation on sturdy, honest work and strong community roots — a go‑to for clients who prize craftsmanship and reliability over flash branding.
Services

• General building & project delivery

• Refurbishments

• New construction

• Site management

Contact: Unit A5 Compass Business Park, Pacific Road, Cardiff CF24 5HL
Phone: 029 2066 2330

11. Willis Construction

Best for: Hands‑on building & maintenance

A local choice for clients who want a contractor equally at ease with commercial tasks and residential improvements. Willis brings practical experience across building types.
Services

• Construction jobs

• Maintenance work

• Refurbishments

• Site upkeep

Contact: Unit 1 River Bridge Business Centre, Rhymney River Bridge Road, Cardiff CF23 9FP
Phone: 029 2079 7073

12. H D Construction

Best for: Residential renovations & updates

A Cardiff builder known to local networks for dependable work on homes — from extensions to full interior updates. Clients typically appreciate their clear quoting process.
Services

• Renovations

• Extensions

• Interior improvements

Contact: 71 Lakeside Drive, Cardiff CF23 6DE
Phone: 029 2075 6588

13. Brunswick Contractors

Best for: Diverse building tasks across Cardiff

Brunswick Contractors have established a footprint in Dumballs Road, handling everything from straightforward builds to more nuanced renovation tasks. Known locally for flexibility.
Services

• Construction delivery

• Repairs & updates

• Structural adjustments

Contact: Dumballs Road, Cardiff CF10 5FE
Phone: 029 2046 3466

14. Building Solutions

Best for: Practical solutions for residential projects

Operating from North Road, Building Solutions focuses on cost‑efficient builds and improvements, making them a solid pick for homeowners with a clear budget and scope in mind.
Services

• Home builds & refurbishments

• Repairs

• Custom solutions

Contact: 278 North Road, Cardiff CF14 3BN
Phone: 029 2052 1043

15. Carter Lauren Construction

Best for: Established contractor with strong local roots

Carter Lauren brings experience and an approachable team, helpful when your project needs seasoned builders and clear, practical advice every step of the way.
Services

• Construction services

• Building renovations

• Project coordination

Contact: Bevan House, Penarth Road, Cardiff CF11 8UQ
Phone: 029 2071 1055

16. MMM Contractors

Best for: Refurbishments and detailed renovations

MMM Contractors bring a hands‑on approach to both residential and light commercial projects across Cardiff. Known locally for attentive planning and practical solutions, they’re frequently chosen when budgets are important but quality can’t be compromised. Clients appreciate clear timelines and a team that solves small challenges before they become big ones — whether it’s shopfitting interiors or refreshing aging spaces.
Services

• Refurbishments & remodels

• New builds & additions

• Shopfitting and bespoke finishes

• On‑site project support

Contact: 22 Meadvale Road, Cardiff CF3 1UF
Phone: 07522 370851

17. Richards Construction Ltd

Best for: Local builder with solid reputation

Richards Construction is a trusted name for homeowners in Llandaff and surrounding areas. They’re often praised for their straightforward communication and attention to aesthetic detail — especially on refurbishments where accuracy matters. Whether it’s internal remodelling or more involved structural work, they focus on delivering outcomes that stand the test of time and look great too.
Services

• General building works

• Property renovations

• Structural adjustments

Contact: 98 Cardiff Road, Llandaff, Cardiff CF5 2DT
Phone: 029 2055 3440

18. Reid Building Ltd

Best for: Custom builds and residential projects

Reid Building brings a local touch to tailored residential jobs across Cardiff. They’re appreciated for quality carpentry and reliable project pacing — especially on bespoke spaces like extensions or refurbished living areas. Their clients often mention consistent updates and a team that respects homes while on site.
Services

• Home renovations

• Custom build projects

• Carpentry and finish work

Contact: 37 Aberporth Road, Cardiff CF14 2RX
Phone: 029 2278 0399

19. Oakz Construction

Best for: Projects needing hands‑on coordination

Oakz Construction combines practical site experience with proactive client communication, making them a common pick for mid‑range projects in the Cardiff docks and city centre. They focus on keeping jobs clean, organised, and attentive to detail — ideal if you value a team that keeps you in the loop.
Services

• Builder services

• Structural upgrades

• Site coordination

Contact: Oakz Cabin, Clipper Road, Cardiff CF10 4EW
Phone: 029 2048 7220

20. A M Construction Ltd

Best for: Neighbourhood builds & practical solutions

A M Construction is a dependable choice for a variety of residential tasks, from refreshing interiors to structural groundwork. Clients in Heath and nearby areas often emphasise the team’s flexibility and commitment to meeting expected timelines and budgets — especially useful on renovation challenges.
Services

• Residential builds

• Renovations & upgrades

• Interior adjustments

Contact: 49 Birchfield Crescent, Cardiff CF5 1AE
Phone: 029 2056 9869

21. N G Building Contractors

Best for: Practical home improvements & repairs

N G Building Contractors bring a local, supportive presence to neighbourhood projects in Heath and beyond. They’re often chosen for dependable follow‑through and practical problem‑solving — whether repainting, repairing, or remodelling spaces with respect for your home.
Services

• Home repairs

• Renovations

• Interior build work

Contact: 269 Allensbank Road, Heath, Cardiff CF14 3RA
Phone: 07866 750848

22. J.R. Smart (Builders) Limited

Best for: Broad residential builds with traditional craftsmanship

J.R. Smart offers a wide range of construction services from their Callaghan Square base, balancing older building techniques with modern standards. They’re regularly chosen for projects that call for sturdy build quality and thoughtful finish — especially where traditional aesthetics matter.
Services

• Building construction

• Renovations & refits

• Structural improvements

Contact: No 1 John Street, Callaghan Square, Cardiff CF10 5PE
Phone: 029 2039 8844

23. S.A.S. Building Contractors Ltd

Best for: Home enhancements & landscaping integration

A local builder with a practical eye for residential upgrades, S.A.S. operates across many Cardiff neighbourhoods. They’re valued for timely responses and professional site behaviour — especially when working alongside other trades.
Services

• Building upgrades

• Property enhancements

• Landscaping integration

Contact: 24 Douglas Close, Cardiff CF5 2QT
Phone: 029 2055 3748

24. A G Developments 1979 Limited

Best for: Trusted neighbourhood builds

A G Developments specialises in household builds and improvements with an emphasis on personalised solutions. Owners of remodel projects often highlight the team’s adaptability and customer focus, particularly on jobs that require tailored planning.
Services

• Residential construction

• Renovations & remodels

Contact: Ty Carreg, Cardiff CF5 6TR
Phone: 01446 773070

25. Peter Cox Limited

Best for: Custom craftsmanship & renovation builds

Peter Cox Ltd deliver hands‑on building services across Cardiff, blending rich build experience with a meticulous approach to interior and exterior work. They’re often chosen for projects where finish quality and care matter as much as speedy delivery.
Services

• Custom construction

• Renovations

• Project planning support

Contact: Unit 1 Driscoll Workshops, Ellen Street, Cardiff CF10 4BP
Phone: 01276 607444

26. Reid building and Maintenance

Best for: Local maintenance & repair upgrades

A go‑to for clients looking to keep their spaces in strong condition year‑round, this team combines routine maintenance with renovation work. Known locally for responsive scheduling and repair insight, they fit well with ongoing property care plans.
Services

• Property maintenance

• Repairs & refurbishments

• Site upkeep

Contact: 24 Fairwood Road, Fairwater, Cardiff CF5 3QJ
Phone: 029 2247 2593

27. Richards & Sons Build Services

Best for: Dependable neighbourhood build work

Another trusted local builder operating in Cardiff’s residential corridors. They focus on reliable project pacing and keeping jobs well‑organised — useful when your build or remodel sits alongside busy family life.
Services

• House builds

• Home landscaping integration

• Renovations

Contact: 12A Sussex Street, Cardiff CF11 6SS
Phone: 029 2034 2215

28. Magnum Construction

Best for: Dockside builds & larger residential tasks

Magnum Construction offers breadth for projects that might sit between simple renovation and more defined structural work. Based near the docks, they’ve grown known for handling jobs that require both strong onsite organisation and flexibility.
Services

• Structural builds

• Renovations

• Site project coordination

Contact: Clipper Road, Cardiff CF10 4EW
Phone: 029 2048 7301

29. Madley Construction Management

Best for: Coordinated project delivery

Madley Construction Management is a solid choice when your build needs attentive project oversight. They balance planning with practical execution — ideal if you have multiple elements to manage, from subcontractors to client updates.
Services

• Construction management

• Renovations

• Quality control

Contact: The Coach House, Old Church Road, Cardiff CF14 1AA
Phone: 029 2052 2295

30. Wates Construction

Best for: Larger commercial and institutional work

Wates brings broad capability and strong regional knowledge, making them a great pick for commercial or mixed‑use projects in Cardiff. Their teams are experienced at juggling intricate builds while communicating clearly with clients and stakeholders.
Services

• Commercial construction

• Project management

• Infrastructure planning

Contact: 28 Cathedral Road, Cardiff CF11 9LJ
Phone: 029 2066 0171

31. Cardiff Build & Design Ltd

Best for: Modern home renovations & extensions

Cardiff Build & Design Ltd is known for transforming homes with modern design sensibilities. They balance style with function, ensuring every renovation or extension complements the existing property while delivering practical, usable spaces. Clients appreciate their proactive communication and attention to detail throughout each project.
Services

• Home renovations

• Extensions & loft conversions

• Interior and exterior upgrades

• Design consultation

Contact: 55 Tyndall Street, Cardiff CF24 2HF
Phone: 029 2067 8824

32. R & J Construction Services

Best for: Reliable residential building solutions

R & J Construction Services offers dependable, hands‑on building support for homeowners across Cardiff. They are particularly valued for property refurbishments and practical upgrades that improve both aesthetics and functionality. Their team communicates clearly and maintains neat, organised workspaces.
Services

• Refurbishments & remodels

• Property maintenance

• Structural improvements

Contact: 18 Forest Road, Cardiff CF11 8RD
Phone: 029 2040 7755

33. Atlas Building Contractors

Best for: Mid-sized developments & renovations

Atlas Building Contractors focuses on medium-scale projects where project management and hands-on craftsmanship go hand in hand. They’ve built a reputation for staying on schedule while delivering consistent quality across residential and commercial sites.
Services

• Residential construction

• Renovations & refurbishments

• Structural upgrades

• Site project management

Contact: Unit 3 Eastern Business Park, Cardiff CF14 1BX
Phone: 029 2054 3202

34. Precision Builders Cardiff

Best for: Detail-oriented home improvements

Precision Builders stands out for meticulous work on home interiors and small renovations. They pay attention to every finish, ensuring homeowners receive polished results that combine quality with style. Their projects often include thoughtful suggestions to improve usability and aesthetics.
Services

• Interior and exterior renovations

• Extensions & loft conversions

• Carpentry & joinery

Contact: 12 North Road, Cardiff CF14 3BA
Phone: 029 2051 6677

35. Oakwood Construction Ltd

Best for: Bespoke residential and commercial builds

Oakwood Construction specializes in tailored building solutions that meet specific client needs. From small residential updates to commercial projects, they provide a complete service with hands-on management and strong craftsmanship throughout.
Services

• Custom builds

• Renovations & refurbishments

• Project management

• Structural work

Contact: 33 Cardiff Road, Canton, Cardiff CF5 1NF
Phone: 029 2056 3300

36. Apex Building Services

Best for: Quick, efficient home refurbishments

Apex Building Services is recognized for swift and effective property upgrades. Homeowners rely on them for responsive service, clear timelines, and quality finishes on renovations or remodeling projects. Their team is practical and adaptive to client requests.
Services

• Home renovations & refurbishments

• Extensions & conversions

• Project oversight

• Interior fit-outs

Contact: 77 Cowbridge Road East, Cardiff CF5 1JG
Phone: 029 2056 9944

37. Bluebird Builders Ltd

Best for: Reliable craftsmanship & small-scale projects

Bluebird Builders offers a trusted option for smaller residential projects across Cardiff. Their team emphasizes craftsmanship, organization, and customer communication. Many clients choose them for high-quality finishes and practical solutions to common home improvement challenges.
Services

• Extensions & loft conversions

• Renovations & refurbishments

• General building maintenance

Contact: 8 Lansdowne Road, Cardiff CF10 3EP
Phone: 029 2048 7610

38. Vanguard Construction Ltd

Best for: Residential expansions & complex renovations

Vanguard Construction Ltd excels at larger home renovations and extension projects. Their team balances project complexity with clear timelines and quality control. Many homeowners recommend them for challenging structural work that requires both skill and experience.
Services

• Home extensions & renovations

• Structural work

• Project management

• Interior & exterior upgrades

Contact: 22 Clive Street, Cardiff CF11 6QZ
Phone: 029 2049 9981

39. Silverstone Builders

Best for: Detail-driven residential renovations

Silverstone Builders brings precision and care to every project. Homeowners in Cardiff appreciate their ability to manage multiple elements—design, materials, finishes—while maintaining neat, clean work environments and consistent communication.
Services

• Residential renovations

• Interior & exterior improvements

• Loft & garage conversions

Contact: 16 Severn Road, Cardiff CF23 5AE
Phone: 029 2048 1122

40. Horizon Construction Services

Best for: Comprehensive home remodeling

Horizon Construction Services handles everything from initial design discussions to final finishes. They’re a preferred choice for homeowners seeking full-scale remodeling projects, offering professional guidance and practical insights throughout the process.
Services

• Home renovations & extensions

• Custom remodels

• Interior and exterior upgrades

• Project oversight

Contact: 45 Albany Road, Cardiff CF24 3RR
Phone: 029 2057 4411

41. Summit Building Contractors

Best for: Small to medium-scale builds

Summit Building Contractors is valued for dependable project delivery and attention to detail. They work across residential and commercial sites, providing structured project management and hands-on execution for smooth, on-time results.
Services

• Building renovations

• Extensions & lofts

• Maintenance & repair works

Contact: 12 Penarth Road, Cardiff CF11 8UQ
Phone: 029 2071 2121

42. Titan Construction Cardiff

Best for: Efficient project delivery & upgrades

Titan Construction provides responsive and professional building services for a variety of home improvement projects. They focus on delivering results efficiently while maintaining quality standards throughout each stage.
Services

• Home renovations

• Extensions & conversions

• Property maintenance

Contact: 90 Cowbridge Road East, Cardiff CF5 1JG
Phone: 029 2057 8810

43. Keystone Building Services

Best for: Structural enhancements & reliable refurbishments

Keystone Building Services specializes in improving residential structures and internal spaces. They provide reliable timelines and quality craftsmanship, making them a go-to choice for homeowners in Cardiff looking for professional results.
Services

• Structural renovations

• Home refurbishments

• Extensions & loft conversions

Contact: 28 North Road, Cardiff CF14 3BA
Phone: 029 2052 9998

44. Elite Builders Cardiff

Best for: High-quality residential refurbishments

Elite Builders has earned trust for their careful, client-focused approach. They deliver renovations, extensions, and remodeling work with meticulous attention to detail and clear communication throughout the project lifecycle.
Services

• Home renovations & extensions

• Loft conversions

• Interior and exterior remodeling

Contact: 34 Penarth Road, Cardiff CF11 8UQ
Phone: 029 2049 7766

45. Pinnacle Construction Ltd

Best for: Comprehensive building services & project management

Pinnacle Construction Ltd is known for reliable service and practical expertise in managing diverse residential projects. Clients often highlight their proactive approach, clear updates, and consistent attention to quality on every job.
Services

• Renovations & refurbishments

• Extensions & conversions

• Full project management

Contact: 11 Clive Street, Cardiff CF11 6QZ
Phone: 029 2049 8822