ISO 9001 accredited construction companies

1905 UK construction companies displaying ISO 9001 on their website.

• S Studiorogers Architects Coleraine · Design & build

  Studiorogers Architects is an award-winning architectural practice based in Northern Ireland, specialising in bespoke design solutions across various

• C Crossfire Specialist Contracts Ltd Maghera · Fire protection · 10-49 employees

  Crossfire Specialist Contracts Ltd offers passive fire protection solutions in Ireland, prioritizing safety and compliance with expert solutions for v

• K Killowen Contracts Ltd Newry · Main contractor · 10-49 employees

  Killowen Contracts Ltd is a leading Building, Civil Engineering and Fit-Out Contractor working throughout Northern Ireland and Ireland for 50 years.

• C Crown Infrastructure Belfast · Electrical · 1-9 employees

  Crown Infrastructure designs, installs and maintains resilient network connectivity infrastructure for commercial buildings, campuses and mission crit

• C Cleary Contracting Ltd Main contractor · 10-49 employees

  Cleary Contracting, founded in 1983, is a family-run, multi-skilled main contractor operating across the UK and Ireland. They specialize in constructi

• B Brendan Loughran & Sons Ltd Omagh · Main contractor · 10-49 employees

  Building & Civil Engineering Contractors Northern Ireland - Commercial, Community, Education, Health, Private, Social Housing Project Undertaken

• K KERCON CONSTRUCTION Londonderry · Main contractor · 1-9 employees

  Kercon Construction is a building and civil engineering main contractor based in Kells, Co. Meath, undertaking projects across Ireland in various sect

• B Bann Ltd Co Armagh · Refurbishment · 10-49 employees

  Bann Ltd is a construction company with a professional management team, specialising in social housing projects. They have a 30-year partnership with

• M Mcfarland Consulting Ltd Belfast · Civil engineering · 10-49 employees

  McFarland Consulting are award-winning specialists in structural durability, focusing on assessing, maintaining, and extending the life of damaged str

• M Marcon Fit-Out Ltd Antrim · Fit-out & interiors · 50-249 employees

  Commercial fit-out specialists in the UK and Ireland, delivering extraordinary spaces from concept to completion with a focus on connections, creativi

• B Bridgepoint Roadmarkings Ltd Warrenpoint · Road surfacing · 10-49 employees

  Bridgepoint Road Markings Ltd is a leading road marking and line removal specialist in Ireland, established in 1985. They offer high-quality line mark

• C Cryotanks Ltd Belfast · Utilities · 1-9 employees

  The largest independent cryogenic liquid gas & tank provider in the UK. Specialising in rental, supply, installation, and maintenance of cryogenic ves

• A Alternative Heat Ltd Banbridge · Modular & offsite construction · 1-9 employees

  Alternative Heat Ltd. are leading suppliers and installers of Offsite Fabrication solutions, specialising in Prefabricated MEP Solutions across the UK

• C Conwell Contracts (UK) Ltd Enniskillen · Civil engineering · 10-49 employees

  Discover over 25 years of expertise in trenchless technology with Conwell Contracts, trusted for innovative civil engineering and reliable solutions a

• H Hawthorn Heights Ltd Derry · Design & build · 1-9 employees

  Specialists in the design and installation of play park equipment, sport pitches and safety surfacing for councils, schools and government.

• C Cole Groundworks Contracts Ltd Newry · Civil engineering · 1-9 employees

  Cole Groundworks Contracts Ltd is a leading civil engineering and groundwork contractor operating across the UK and Ireland, established in 2005. They

• H Htc Mechanical Services Ltd Dungannon · Heating & ventilation · 10-49 employees

  HTC Mechanical Services provides completed mechanical services from design to installation across Northern Ireland, Republic of Ireland and the UK.

• H Highway Barrier Solutions Ltd Belfast · Road surfacing · 50-249 employees

  HBS provide a wide range of services including Vehicle Restraint Systems and Traffic Management across the UK and Ireland. Solutions can be implemente

• R Railway Plant Services Ltd Ballymena · Rail infrastructure · 10-49 employees

  Railway Plant Services Ltd hires Road Rail Vehicles (RRVs) and certified staff for operation on the Northern Ireland Railways network. Founded in 2008

• W Wallace Protection Systems Ltd Lurgan · Security systems · 1-9 employees

  Specialising in vehicle and pedestrian safety, Wallace Protection Systems Ltd offers vehicular barrier systems, handrails, and bollards for car parks

• P Profitec Solutions Ltd Cookstown · Electrical · 10-49 employees

  Profitec Solutions Ltd is a systems integration specialist providing electrical installation, process automation, and control engineering for industri

• P Precision Group Londonderry · M&E contracting · 1-9 employees

  The Precision Group has a breath of experience delivering innovative, first class facility support and service solutions across NI & Ireland.

• A AG Wilson Civil Engineering Craigavon · Civil engineering · 50-249 employees

  A.G.Wilson Limited provide a comprehensive range of professional civil engineering services to both private and public sectors. Over 40 years experien

• B Bell Contracts & Co Ltd Cookstown · Main contractor · 10-49 employees

  Bell Contracts & Co.Ltd is a family-run building contractor with offices in Cookstown, Falkirk & Dublin, specialising in Health, Education, Social Hou

• L Lowry Building & Civil Engineering Ltd Castlederg · Main contractor · 50-249 employees

  Lowry Building & Civil Engineering Ltd is a leading contractor in Northern Ireland, delivering quality construction and civil engineering projects for

• G Grant Fit Out Newry · Fit-out & interiors · 10-49 employees

  Grant Fit Out specialises in creating brand experience fit outs for retail, office, hospitality, education, pharmaceutical, and healthcare sectors, tr

• P Power Grid Civils Ltd Omagh · Civil engineering · 10-49 employees

  Providing highly specialised engineering and consultancy services to service providers within the energy and power utilities sectors across the UK and

• A Am Electrical Services (Ni) Ltd Dungannon · Electrical · 10-49 employees

  AM Electrical Services (NI) Ltd is a premier electrical firm offering top tier engineering solutions for high-end construction projects in the UK and

• K Kevmar Ltd Londonderry · Steel fabrication · 10-49 employees

  Kevmar Ltd is a premier engineering company based in Derry, Northern Ireland, providing exceptional engineering solutions and manufacturing high-preci

• C C H P Mechanical Services Ltd Dundrum · Heating & ventilation · 1-9 employees

  CHP Mechanical Services Ltd is a renewable energy and commercial heating installation company, offering bespoke solutions from design to commissioning

• A Anamore Ltd Omagh · Design & build · 1-9 employees

  A specialist design and build principal contractor within the building remediation sector. We save lives by making buildings better.

• O Orby Investment Belfast · Main contractor · 1-9 employees

  Orby Investment is a leading construction company in Northern Ireland, offering high quality property solutions across all sectors including social, p

• A Aspire Create Ltd Bangor · Carpentry & joinery · 10-49 employees

  Aspire Create Ltd are joinery manufacturing and interior fit-out experts serving retail, commercial, hospitality, and residential sectors across North

• A Acs Civils Ltd Omagh · Civil engineering · 10-49 employees

  ACS Civils Ltd is a Civil Engineering Contractor in Northern Ireland, specialising in Earthworks, Groundwork, Demolition, Haulage and Land Remediation

• H Henry Brothers Ltd Magherafelt · Main contractor · 50-249 employees

  Henry Brothers is a leading privately owned multi-disciplinary construction company delivering high-quality, cost-effective, sustainable solutions.

• D DOHERTY BUILD LTD Newry · Main contractor · 1-9 employees

  Doherty Build is a construction and civil engineering firm with over 40 years of experience. They specialize in quality workmanship, eco-build systems

• P Patrick F O'Reilly Ltd Newry · Painting & decorating · 1-9 employees

  Patrick F. O'Reilly provides professional painting & decorating services across the UK & Ireland. From commercial to residential services.

• H Horizon Engineering Solutions Ltd Belfast · Electrical · 10-49 employees

  Horizon Engineering Solutions provides the only Electrical and Carbon Training Academy in Northern Ireland. Contact us now!

• O OHMG Newry · Main contractor

  OHMG Ltd is a leading construction contractor and property developer across the UK and Ireland, committed to delivering infrastructure services and co

• T TOTALIS Belfast · Main contractor · 10-49 employees

  TOTALIS are a trusted contractor working within Construction, Fit Out and Facilities Management across the UK and Ireland. Delivering high quality bui

• N Newtownstewart Construction U.K. Ltd Londonderry · Main contractor · 10-49 employees

  Newtownstewart Construction UK Ltd is a building and civil engineering contractor operating in construction, civil engineering, plant hire, property i

• V Vision Fabrications Ltd Lisburn · Steel fabrication · 10-49 employees

  Vision Fabrications Limited offers architectural and structural steelwork solutions, from design to installation, across the UK and Ireland.

• A Ads Mechanical Ltd Ballynahinch · Plumbing · 1-9 employees

  Providing top plumbing, heating, roofing, electrical, and joinery services across Northern Ireland for both residential and commercial clients.

• F Flamma Ltd Bangor · Fire protection · 1-9 employees

  Flamma Ltd are Irelands leading specialists in Passive Fire Protection. Offering fire retardant coatings, fire stopping, and compartmentation for list

• M Mcgurran Civils Ltd Enniskillen · Civil engineering · 10-49 employees

  McGurran Civils Limited offers comprehensive civil engineering and construction solutions across Ireland and the UK, specializing in complex projects

• A AEL Environmental Specialists Antrim · Asbestos removal · 1-9 employees

  AEL Environmental Specialists provide licensed asbestos removal, demolition, and environmental services across Northern Ireland. Fully licensed and ac

• D Devine Scaffolding Services Ltd Strabane · Scaffolding · 1-9 employees

  Devine Scaffolding Services Ltd is a family-run business specialising in scaffolding supply, erection, and hire across Northern Ireland, the UK, and D

• R Refresh NI Belfast · Heating & ventilation · 10-49 employees

  Refresh NI offer a variety of affordable energy efficient home improvements across NI! EV Charge Point Installers | Gas Conversions & More |

• L Linton Fencing and Sports Grounds Lisburn · Fencing · 1-9 employees

  Linton Fencing & Sportsgrounds Ltd is an experienced fencing contractor based in Northern Ireland, serving the UK and Ireland. They offer a wide range

• D De Romein Nearshore Lisburn · Marine & water engineering · 10-49 employees

  De Romein Nearshore specialises in nearshore civil engineering installations, particularly for subsea cable sectors for Marine Electricity Interconnec