Main contractors in the UK

20744 UK companies working as main contractors.

• O Opulent Outdoor Living Ltd Wrexham · Design & build

  Discover luxury and comfort with Opulent Outdoor Living. Elevate your outdoor lifestyle with quality and style.

• O Opuluxe Building And Damp Solutions Ltd London · Damp proofing

  A family run building and damp proofing company covering South London and Kent. Professional, dependable, and known for high-quality solutions.

• O Opus Building Services Ltd Boldon · M&E contracting · 50-249 employees

  OPUS Building Services Ltd is a leading contractor of mechanical, electrical and building services across a wide range of sectors throughout the UK. F

• O Opus Carpentry Ltd Isle Of Lewis · Kitchen fitting

  Opus Carpentry offers kitchen supply and fitting, joinery, extensions, renovations, and construction services on the Isle of Lewis.

• O Opus Construction And Civils Ltd Birmingham · Main contractor

  Opus Construction and Civils Ltd are a specialist construction company operating in the insurance repair sector on complex projects.

• O Opus Property Ltd Bristol · Main contractor · 1-9 employees

  Opus Property Ltd offers end-to-end client experience for commercial and residential projects, including new construction, repairs, and restorations.

• O Opus Utility Solutions Warrington · Utilities · 10-49 employees

  Opus Utility Solutions is a Tier 1 SME delivering civil & electrical engineering solutions in the utilities sector, supporting DNOs and IDNOs around t

• O Opus4 Manchester · Design & build · 10-49 employees

  Helping UK businesses transform culture and realise long-term growth with strategic, people-focused office design and fitout for commercial workspaces

• O Orama Group Ltd. Cockfosters · Design & build

  Orama Group is the construction company of choice for high end residential and commercial design and development projects.

• O Orange Building Solutions Ltd Biggleswade · Refurbishment

  We provide expertise in all aspects of property improvements across Hertfordshire, Bedfordshire and Cambridgeshire.

• O Orange Construction (UK) Ltd Ashford · Main contractor · 1-9 employees

  Orange Construction UK Ltd. offers high-quality construction, refurbishment, and landscaping services for residential and commercial buildings, delive

• O Orange Construction Coventry Ltd Coventry · Refurbishment

  Orange Construction Coventry Ltd is a construction company specialising in home renovations, new builds, extensions, and a wide range of property impr

• O Orange Decorating Services Ltd Biggleswade · Painting & decorating

  Orange Decorating Services Ltd are the painting and decorating division of The Orange Property Improvements Group. Family-run business operating acros

• O Orange Eco Roofing Ltd London · Roofing

  Roof overcladding and roofing services for homes and businesses. Extend roof life, improve energy efficiency and reduce disruption with Orange Eco Roo

• O Orange Electrical Contractors Ltd Walsall · Electrical

  Trusted West Midlands electrical contractors delivering innovative design and build solutions for commercial and residential projects. Reliable, effic

• O Orange Grove Construction Ltd Hengoed · Extensions · 1-9 employees

  Orange Grove Construction is a highly regarded construction firm in Hengoed with over 30 years of experience, known for craftsmanship, effective commu

• O ORANGE LLAMA Cardiff · Design & build · 1-9 employees

  Orange Llama offers design and construction innovation in South Wales, specializing in smart technology integration for dream builds and renovations.

• O Orange Projects Ltd Crawley · Fit-out & interiors · 1-9 employees

  Orange Projects offers bespoke commercial fit-outs and office refurbishments across London and England, founded in 2008. Specialising in partitioning,

• O Orange Property Brighton · Main contractor · 10-49 employees

  Orange Property is a construction and property services company focused on delivering exceptional service and building long-term relationships. They o

• O Orbit Construction Services Ltd Widnes · Main contractor · 1-9 employees

  Orbit Construction Services Ltd specialises in commercial and domestic construction, offering home extensions, refurbishments, and commercial work lik

• O Orbro Pools Ltd Pulborough · Swimming pools

  Orbro POOLS create award winning swimming pools | Professional and experienced swimming pool builders and landscapers in the South East | DIY Self Bui

• 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

• O Orca Windows Ltd Shipley · Windows & doors

  For Energy Efficient Windows in West Yorkshire, look no further than Orca Windows. We supply and install eco-friendly windows, get a FREE quote today!

• O Orchard Build Ltd Feering · Refurbishment · 10-49 employees

  The leading specialists in commercial and industrial refurbishment for over 25 years. Specialising in office and industrial refurbishment and fit-out.

• O Orchard Builders Stamford · Main contractor · 10-49 employees

  Orchard Building Contractors is a Stamford-based building company with over 30 years of experience. We pride ourselves on offering a reliable, quality

• O Orchard Building Solutions Ltd Richmond · Main contractor

  Orchard Building Solutions provides planned and reactive maintenance, refurbishments, office fit-outs, extensions, and loft conversions for residentia

• O Orchard Homes Leeds · House builder · 1-9 employees

  Orchard Homes focuses on creating bespoke, hand-crafted and high-quality homes to suit all lifestyles, with 30 years' experience in the house building

• O Orchid Sky Construction Ltd Chandlers Ford · Timber frame · 1-9 employees

  Orchid Sky Construction are timber frame and construction specialists in the UK with over 40 years of experience. They offer high-quality, sustainable

• O Orchis London Ltd Farnborough · Main contractor

  Orchis delivers super-prime residential construction across Mayfair, Belgravia, Knightsbridge, Chelsea, and the counties. Director-led building for de

• O ORDERLY LONDON LTD Wokingham · Refurbishment

  Orderly London specialises in design-led renovations, extensions and full refurbishments for period and characterful homes across South West London an

• O Ordon Ltd Dartford · Main contractor · 1-9 employees

  Ordon Ltd is a building contractor based in London, focused on providing high-quality service and customer satisfaction. They offer a range of service

• O Oren Construction Ltd Carmarthen · Plastering

  OREN CONSTRUCTION LTD is a construction company based in Carmarthen, Wales.

• O Origin Electrical And Mechanical Services Ltd Ossett · Electrical

  Expert electrical and mechanical services for residential and commercial clients across the UK. Committed to quality, safety, and innovation.

• O Origin GPH Glasgow · Plumbing

  Origin GPH offers expert plumbing, heating, and boiler services in Glasgow and surrounding areas. Established in 2019, they provide reliable solutions

• O Origin Pools Ltd Old Hatfield · Swimming pools

  Origin Pools creates bespoke indoor swimming pools for your home. Relax in a luxurious pool designed and built to the highest standards by our experts

• O Original Landscapes Ltd Sherborne · Landscaping

  Original Landscapes specialises in the design and build of award-winning landscaped and bespoke planting schemes for gardens throughout Dorset, Wiltsh

• O Original Roofing Company Ltd Blaenau Ffestiniog · Roofing

  Original Roofing Company, based in Blaenau Ffestiniog, specialises in slate roofing and conservation. They offer innovative solutions like the Stormfl

• O Oriole Constructors Ltd. London · Refurbishment · 1-9 employees

  Oriole Constructors Ltd offers quality, time, and cost control in building and construction projects across Bracknell and West London.

• O Orion Atlantic Ltd Manchester · Refurbishment · 1-9 employees

  Orion Atlantic UK is a property investment, development, and construction company delivering high-quality spaces built for modern living and long-term

• O Orion Homes Horbury Wakefield · House builder

  Orion Homes have been building the finest new homes in Yorkshire for over four decades. This experience is one of the many things that sets us apart.

• O Oris Construction Ltd York · Groundworks · 1-9 employees

  Oris Construction Ltd is a family-owned groundworks and civil engineering company serving domestic and commercial clients across Yorkshire. They offer

• O Orkney Builders (Contractors) Ltd Kirkwall · Main contractor · 50-249 employees

  Orkney Builders (Contractors) Limited is a long-established company providing professional and reliable services across all types of construction work

• O Ormwood Homes Ltd Accrington · House builder · 1-9 employees

  Ormwood Homes Limited is a North West based company with over 25 years of experience in home building.

• O Orostream International Contracts Ltd East Sussex · Main contractor · 10-49 employees

  Global specialists in secure environment construction, fit-out & refurbishment. Over 40 years of experience providing specialised building solutions t

• O Orsett Property Development Ltd Chelmsford, Essex · Property developer

  Orsett Property Development is a premier property development company creating exceptional spaces and shaping communities with a passion for innovatio

• O Orton Group Halesowen · Electrical · 10-49 employees

  Orton Group is a leading UK provider of Electrical, Mechanical, and Maintenance Services, recognised with the Contractor of the Year award.

• O Orton Group Halesowen · Electrical

  Leading UK Electrical, Mechanical and Maintenance Services provider, delivering high-quality service on time and on budget for complex projects.

• O Orvis Builders Ltd Bury St. Edmunds · Main contractor

  Orvis Builders offers expert building services in Bury St Edmunds and Cambridge, covering Suffolk, Cambridgeshire, and Norfolk. Specialising in new bu

• O Orwell Heath Homes Ltd Woking · Refurbishment · 1-9 employees

  Orwell Heath specialises in prime bespoke renovations and refurbishments in the Surrey region.

• O Orwell Homes Ipswich · House builder

  Orwell Homes Limited is a development company that designs and builds quality homes for sale, with profits gifted to Orwell Housing Association to sup