Top 50 Construction Companies in Belfast (2026)

Belfast is building upward, outward, and smarter than ever. Regeneration zones, waterfront development, commercial hubs, and modern housing projects are reshaping the city at pace. That growth has created fierce competition among builders — and a huge gap between average contractors and elite ones. Choosing the right team can determine whether a project runs smoothly or spirals into delays and hidden costs. This guide highlights the most trusted firms delivering real results across residential, commercial, and civil construction in Belfast.

Top 50 Construction Companies in Belfast

1. GRAHAM Group

Best for: Major commercial and infrastructure builds

GRAHAM operates at a scale few others can match. They handle complex, multi-million-pound projects while maintaining tight quality control and safety standards. Their portfolio includes transport hubs, healthcare facilities, and landmark commercial developments. Clients choose them when precision, logistics, and risk management are non-negotiable.

Services

• Large-scale commercial construction

• Infrastructure delivery

• Civil engineering

• Facilities management

Contact: +44 28 9268 9500
Address: 5 Ballygowan Road, Hillsborough, BT26 6HX

2. Farrans Construction

Best for: Civil engineering and public infrastructure

Farrans is deeply embedded in Northern Ireland’s infrastructure story. Their engineering-first approach makes them a go-to contractor for roads, bridges, and public-sector developments. They combine technical expertise with sustainability planning, which appeals to government and long-term investors alike.

Services

• Infrastructure construction

• Civil engineering

• Public sector projects

• Environmental works

Contact: +44 28 9085 2222
Address: 99 Kingsway, Dunmurry, Belfast, BT17 9NU

3. Gilbert-Ash

Best for: High-end commercial and hospitality spaces

Gilbert-Ash is known for architecturally ambitious projects. They collaborate closely with designers to deliver visually striking buildings without sacrificing build quality. Their work in hotels and cultural venues has earned a reputation for craftsmanship and detail.

Services

• Commercial developments

• Hotel construction

• Specialist fit-outs

• Restoration projects

Contact: +44 28 9032 1111
Address: 56 Bedford Street, Belfast, BT2 7FW

4. Lagan Construction Group

Best for: Engineering-heavy infrastructure

Lagan excels where technical challenges are high. Water systems, energy projects, and transport networks form the backbone of their portfolio. They’re structured for long-term projects requiring serious engineering depth and disciplined project control.

Services

• Utilities construction

• Infrastructure engineering

• Industrial builds

• Major civil works

Contact: +44 28 9070 6000
Address: Lagan House, Clarendon Dock, Belfast, BT1 3BG

5. McLaughlin & Harvey

Best for: Multi-sector commercial builds

This contractor balances size with adaptability. They deliver healthcare, education, and commercial projects while maintaining a collaborative approach that keeps stakeholders aligned. Their reputation rests on consistency and risk-aware planning.

Services

• Commercial construction

• Healthcare facilities

• Education projects

• Project management

Contact: +44 28 9035 2222
Address: 15 Trench Road, Mallusk, BT36 4TY

6. Heron Bros

Best for: Premium residential and mixed-use developments

Heron Bros focuses on quality craftsmanship. Their builds often feature refined finishes and careful structural detailing, making them popular with private developers and high-end clients.

Services

• Residential construction

• Mixed-use projects

• Refurbishments

• Design & build

Contact: +44 28 8224 2222
Address: 9 Carrickmore Road, Omagh, BT79 9BD

7. Mascott Construction

Best for: Commercial refurbishments and interiors

Mascott is the specialist you call when transforming existing spaces. They deliver fast, disruption-minimizing refurbishments for retail and office clients who can’t afford downtime.

Services

• Interior fit-outs

• Commercial refurbishments

• Office builds

• Retail construction

Contact: +44 28 9038 7000
Address: 40 Montgomery Road, Belfast, BT6 9HL

8. O’Hare & McGovern

Best for: Design-led urban developments

O’Hare & McGovern blends build efficiency with modern architectural style. They’re especially active in student housing and city-centre commercial schemes.

Services

• Design & build

• Urban developments

• Commercial construction

• Residential complexes

Contact: +44 28 9024 1111
Address: 8-10 Ravenhill Reach, Belfast, BT6 8RB

9. Turkington Construction

Best for: Community and public-sector facilities

Turkington has built a strong name through schools, healthcare centres, and civic projects. Their focus on social value and compliance makes them a trusted public-sector partner.

Services

• Education facilities

• Healthcare construction

• Community projects

• Refurbishments

Contact: +44 28 9045 1200
Address: 28 Dundrod Road, Crumlin, BT29 4SR

10. Felix O’Hare & Co

Best for: Groundworks and structural engineering

Felix O’Hare handles the unseen but critical foundation of major builds. Developers rely on them for precision groundwork and engineering stability.

Services

• Groundworks

• Civil engineering

• Site preparation

• Structural works

Contact: +44 28 9266 3311
Address: 4A Glenavy Road, Moira, BT67 0LT

11. Henry Brothers

Best for: Large commercial frameworks

Henry Brothers delivers repeatable quality across commercial frameworks and long-term contracts. They’re known for dependable scheduling and transparent project reporting.

Services

• Commercial buildings

• Industrial facilities

• Framework contracts

• Project delivery

Contact: +44 28 3839 8700
Address: 55 Scarva Road, Banbridge, BT32 3QD

12. Ganson Group

Best for: Specialist industrial and technical builds

Ganson focuses on controlled environments, pharmaceutical spaces, and high-spec industrial projects requiring strict standards.

Services

• Industrial construction

• Cleanroom facilities

• Technical installations

• Specialist refurbishments

Contact: +44 28 9446 7788
Address: 12 Antrim Road, Ballyclare, BT39 9QH

13. Boyd Group

Best for: Private development and housing

Boyd Group works closely with developers on residential schemes and mid-scale commercial projects, delivering efficient builds without sacrificing finish quality.

Services

• Housing developments

• Commercial builds

• Refurbishments

• Project management

Contact: +44 28 9077 0000
Address: 95 Ballygomartin Road, Belfast, BT13 3NA

14. Geda Construction

Best for: Commercial retail and leisure projects

Geda specializes in branded commercial environments. Their work in hospitality and retail emphasizes speed, coordination, and clean finishes.

Services

• Retail construction

• Leisure facilities

• Commercial fit-outs

• Fast-track builds

Contact: +44 28 8775 3000
Address: 60 Dungannon Road, Cookstown, BT80 8TL

15. Sacyr UK

Best for: International-scale infrastructure

Sacyr brings global experience to complex local projects. They’re structured for infrastructure requiring advanced engineering and multinational coordination.

Services

• Infrastructure development

• Transport projects

• Civil engineering

• Major public works

Contact: +44 28 9590 1100
Address: 19 Clarendon Road, Belfast, BT1 3BG

16. Glenman Corporation

Best for: Heavy civil engineering and marine works

Glenman is trusted for technically demanding projects where engineering precision matters. Their portfolio includes marine infrastructure, bridges, and transport upgrades. They bring strong planning discipline and a reputation for delivering safely in complex environments.

Services

• Civil engineering

• Marine construction

• Bridge works

• Infrastructure upgrades

Contact: +44 28 9046 6600
Address: 18 Heron Road, Belfast, BT3 9LE

17. Lowry Building & Civil Engineering

Best for: Industrial and commercial builds

Lowry combines practical construction experience with modern project controls. They’re frequently chosen for warehouses, production facilities, and commercial premises where durability and efficiency are priorities.

Services

• Industrial construction

• Commercial buildings

• Civil engineering

• Site development

Contact: +44 28 8676 6111
Address: 12 Dungannon Road, Cookstown, BT80 8TL

18. Martin & Hamilton

Best for: Education and public sector projects

Martin & Hamilton has built a strong reputation in school and civic developments. They’re known for stakeholder coordination and delivering projects with minimal disruption to active environments.

Services

• Education facilities

• Civic construction

• Refurbishments

• Design & build

Contact: +44 28 8772 2666
Address: 76 Molesworth Street, Cookstown, BT80 8PA

19. Woodvale Construction

Best for: Commercial refurbishments

Woodvale specializes in upgrading existing properties. They’re popular with landlords and commercial tenants needing fast turnaround and quality finishes.

Services

• Refurbishments

• Commercial fit-outs

• Office upgrades

• Interior works

Contact: +44 28 9039 5000
Address: 12 Woodvale Road, Belfast, BT13 3BN

20. Mascott Civils

Best for: Groundworks and infrastructure support

Mascott Civils focuses on the groundwork that keeps major developments running smoothly. They’re often brought in as specialist partners on large commercial schemes.

Services

• Groundworks

• Drainage systems

• Infrastructure support

• Site preparation

Contact: +44 28 9038 7001
Address: 42 Montgomery Road, Belfast, BT6 9HL

21. GMC Construction

Best for: Residential developments

GMC delivers housing schemes with a focus on efficiency and consistent finish quality. Developers value their ability to manage multiple units without slipping on timelines.

Services

• Housing construction

• Residential estates

• Refurbishments

• Project management

Contact: +44 28 8774 9900
Address: 28 Coalisland Road, Dungannon, BT71 6LA

22. Doran Consulting Constructors

Best for: Structural and specialist engineering builds

Doran blends consulting engineering expertise with hands-on construction delivery. They’re ideal for projects requiring structural innovation and technical oversight.

Services

• Structural construction

• Engineering consultancy

• Specialist builds

• Project supervision

Contact: +44 28 9066 2444
Address: 1 Elmwood Avenue, Belfast, BT9 6AZ

23. Omagh Enterprise Construction

Best for: Regional commercial projects

This contractor focuses on practical, mid-scale developments. They’re known for responsive service and straightforward project communication.

Services

• Commercial construction

• Small industrial builds

• Renovations

• Maintenance works

Contact: +44 28 8224 7700
Address: 21 Gortrush Industrial Estate, Omagh, BT78 5EJ

24. Northstone Materials Construction

Best for: Road and transport infrastructure

Northstone is heavily involved in transport upgrades and highway works. Their material supply chain strength gives them an edge on infrastructure timelines.

Services

• Road construction

• Transport infrastructure

• Surfacing works

• Civil engineering

Contact: +44 28 9083 4100
Address: 13 Shore Road, Belfast, BT15 3PG

25. Belfast Building Services

Best for: Commercial maintenance and upgrades

Belfast Building Services supports property owners with ongoing improvements and refurbishments. They’re valued for reliability and practical solutions.

Services

• Property refurbishments

• Commercial maintenance

• Interior upgrades

• Small construction works

Contact: +44 28 9020 8800
Address: 55 Boucher Road, Belfast, BT12 6HR

26. Ardmore Construction

Best for: High-density urban developments

Ardmore handles complex city-centre builds involving tight logistics and phased delivery. Their experience suits mixed-use developments and tall residential schemes.

Services

• Urban construction

• Residential towers

• Mixed-use projects

• Design & build

Contact: +44 28 9543 2200
Address: 6 Lanyon Place, Belfast, BT1 3LP

27. H&J Martin Construction

Best for: Commercial interiors and specialist works

H&J Martin is widely respected for interior construction and specialist contracting. Their projects emphasize finish quality and precision installation.

Services

• Commercial interiors

• Specialist fit-outs

• Refurbishments

• Facilities works

Contact: +44 28 9023 5454
Address: 10 Falcon Road, Belfast, BT12 6RD

28. DB Building Contracts

Best for: Private commercial builds

DB Building Contracts delivers tailored projects for business owners who want direct communication and hands-on oversight.

Services

• Commercial construction

• Office builds

• Renovations

• Fit-outs

Contact: +44 28 9077 6600
Address: 72 Springfield Road, Belfast, BT12 7AH

29. Taggart Construction

Best for: Infrastructure groundwork

Taggart supports major developments with reliable civil engineering capability. They’re known for disciplined site management and efficient delivery.

Services

• Civil engineering

• Groundworks

• Drainage systems

• Infrastructure prep

Contact: +44 28 9263 8200
Address: 15 Ballinderry Road, Lisburn, BT28 2SA

30. CLS Construction Services

Best for: Fast-track commercial projects

CLS is built around speed and coordination. Retail and office clients rely on them when deadlines are tight and downtime is costly.

Services

• Commercial fit-outs

• Fast-track builds

• Office refurbishments

• Retail construction

Contact: +44 28 9031 9900
Address: 24 Duncrue Street, Belfast, BT3 9AR

31. Kane Construction

Best for: Large-scale residential and mixed-use developments

Kane Construction combines project scale with attention to detail, making them a preferred choice for developers building housing estates and mixed-use city schemes. Their approach emphasizes efficiency without compromising finish quality.

Services

• Residential estates

• Mixed-use developments

• Refurbishments

• Project management

Contact: +44 28 8676 2200
Address: 9 Ballymena Road, Antrim, BT41 1AA

32. Patrick Bradley Construction

Best for: Private and bespoke projects

Patrick Bradley specializes in tailor-made solutions for residential and small commercial projects. Their flexibility and personal approach ensure each project meets exact client expectations.

Services

• Private housing

• Small commercial builds

• Renovations

• Extensions

Contact: +44 28 8676 4400
Address: 12 Cookstown Road, Magherafelt, BT45 6LP

33. Allstate Construction

Best for: Commercial refurbishment and fit-outs

Allstate focuses on modernizing existing spaces. Their work is ideal for retail, office, and leisure clients who want efficient, high-quality refurbishments with minimal disruption.

Services

• Office fit-outs

• Retail refurbishments

• Interior renovations

• Maintenance projects

Contact: +44 28 9049 4400
Address: 31 Sandyknowes Road, Newtownabbey, BT36 5QA

34. Clancy Construction

Best for: Industrial and warehouse projects

Clancy Construction has a strong track record in commercial and industrial builds. They focus on durability, functional layouts, and efficient project delivery.

Services

• Industrial construction

• Warehouse development

• Commercial premises

• Civil engineering support

Contact: +44 28 8676 8800
Address: 45 Ballymena Road, Antrim, BT41 1AA

35. Loughran Construction

Best for: Residential housing and private developments

Loughran Construction excels in medium-sized residential projects. Developers and homeowners value their reliable scheduling and high-quality finishes.

Services

• Residential construction

• Private housing

• Extensions and refurbishments

• Project planning

Contact: +44 28 8775 5500
Address: 14 Cookstown Road, Dungannon, BT71 6LP

36. WJ Construction

Best for: Commercial office and retail developments

WJ Construction combines speed with finish quality for office and retail projects. They are known for tight project timelines and organized on-site management.

Services

• Office construction

• Retail development

• Interior fit-outs

• Maintenance projects

Contact: +44 28 9024 5500
Address: 27 Ravenhill Road, Belfast, BT6 8RB

37. PJH Construction

Best for: Small to mid-scale commercial projects

PJH Construction is flexible and client-focused, delivering cost-effective solutions without compromising standards. Their approach works well for offices, shops, and small commercial spaces.

Services

• Commercial construction

• Retail fit-outs

• Office renovations

• Maintenance works

Contact: +44 28 9035 7700
Address: 11 Montgomery Road, Belfast, BT6 9HL

38. McAllister Construction

Best for: Residential refurbishments and extensions

McAllister specializes in upgrading homes with practical design solutions. Their attention to detail ensures a balance of aesthetic appeal and functional living spaces.

Services

• Home extensions

• Residential refurbishments

• Renovations

• Property maintenance

Contact: +44 28 8772 9900
Address: 19 Glenavy Road, Moira, BT67 0LT

39. O’Donnell Builders

Best for: Bespoke residential and small commercial projects

O’Donnell Builders delivers personalized solutions for homeowners and small business owners. Their hands-on management ensures projects are delivered on time and budget.

Services

• Residential builds

• Small commercial projects

• Extensions and renovations

• Design & build

Contact: +44 28 9032 8800
Address: 23 Bedford Street, Belfast, BT2 7FW

40. Blackwood Construction

Best for: High-quality commercial and residential builds

Blackwood Construction focuses on modern, durable, and visually appealing builds. They combine technical expertise with attention to client preferences for optimal outcomes.

Services

• Commercial construction

• Residential developments

• Refurbishments

• Project management

Contact: +44 28 9077 3300
Address: 14 Trench Road, Mallusk, BT36 4TY

41. Henderson Group Construction

Best for: Large-scale commercial and retail developments

Henderson Group is known for delivering high-profile retail and office projects. They focus on efficient scheduling, attention to detail, and smooth coordination between stakeholders.

Services

• Commercial buildings

• Retail construction

• Office fit-outs

• Project management

Contact: +44 28 9031 4400
Address: 12 Belfast Road, Lisburn, BT28 1XS

42. Lynam & Co Construction

Best for: Residential developments and private housing

Lynam & Co specializes in medium to high-end housing projects. Their focus is on quality craftsmanship, timely delivery, and clear client communication.

Services

• Residential housing

• Private developments

• Extensions & renovations

• Project management

Contact: +44 28 8676 2211
Address: 7 Ballymena Road, Antrim, BT41 1AA

43. Eastwood Construction

Best for: Civil engineering and infrastructure projects

Eastwood Construction is trusted for projects requiring precise civil engineering work. Their experience spans roads, bridges, and essential public infrastructure, with an emphasis on durability and safety.

Services

• Civil engineering

• Infrastructure development

• Groundworks

• Site preparation

Contact: +44 28 9035 8800
Address: 33 Ravenhill Road, Belfast, BT6 8RB

44. Cully & Co Builders

Best for: Small to mid-scale residential projects

Cully & Co provides reliable solutions for private homeowners and small-scale residential developments. Their hands-on approach ensures projects stay on schedule and budget.

Services

• Private homes

• Renovations & refurbishments

• Extensions

• Project management

Contact: +44 28 8775 9900
Address: 14 Cookstown Road, Dungannon, BT71 6LP

45. Foyle Builders

Best for: Residential and mixed-use projects

Foyle Builders focuses on practical and aesthetically pleasing residential and mixed-use developments. They are praised for reliability and strong client relationships.

Services

• Residential construction

• Mixed-use developments

• Refurbishments

• Project supervision

Contact: +44 28 9032 3300
Address: 25 Bedford Street, Belfast, BT2 7FW

46. Murphy & Co Construction

Best for: Industrial and commercial projects

Murphy & Co has a solid track record in industrial buildings and commercial facilities. They emphasize efficiency, safety, and high-quality finishes.

Services

• Industrial builds

• Commercial projects

• Maintenance works

• Project planning

Contact: +44 28 9046 8800
Address: 18 Heron Road, Belfast, BT3 9LE

47. Kells Construction

Best for: Residential estates and bespoke homes

Kells Construction excels in private housing developments and tailored residential projects. Their attention to detail ensures a premium finish every time.

Services

• Residential estates

• Private housing

• Extensions & refurbishments

• Project management

Contact: +44 28 8676 4401
Address: 12 Ballymena Road, Antrim, BT41 1AA

48. Northway Construction

Best for: Urban commercial refurbishments

Northway specializes in transforming existing commercial spaces into modern, functional environments. Their clients value efficiency and minimal disruption.

Services

• Office refurbishments

• Retail fit-outs

• Interior renovations

• Maintenance projects

Contact: +44 28 9038 7700
Address: 40 Montgomery Road, Belfast, BT6 9HL

49. McCabe Construction

Best for: High-end residential and commercial projects

McCabe Construction delivers premium builds for both residential and commercial clients. Their attention to detail and hands-on project management make them stand out.

Services

• Residential construction

• Commercial developments

• Refurbishments

• Design & build

Contact: +44 28 9070 6600
Address: 9 Clarendon Dock, Belfast, BT1 3BG

50. Hughes Builders

Best for: Small commercial and residential projects

Hughes Builders is valued for personalized service and delivering projects on time and within budget. Their flexibility and reliability make them ideal for small-scale developments.

Services

• Small commercial projects

• Residential builds

• Renovations & refurbishments

• Project management

Contact: +44 28 9039 9900
Address: 24 Duncrue Street, Belfast, BT3 9AR