Main contractors in the UK

6990 main contractors listed from the UK register.

• O Omniform Ltd London · Main contractor · 1-9 employees

  Omniform is a London construction partner for architect-designed homes: whole-house refurbishments, structural work, basements, and new build properti

• O Omniscience Care Ltd London · Main contractor · 10-49 employees

  Omniscience Care is a specialist partner in complex built-environment projects, aligning design, safety, and commercial outcomes for resilient, high-p

• O OMNYRA London · Main contractor

  OMNYRA provides execution-led leadership for high-risk industrial projects, shutdowns, and major hazard environments, restoring authority and control.

• O On Point Building & Joinery London · Main contractor · 1-9 employees

  On Point Building & Joinery Ltd offers expert building and joinery services in Blackpool and the North West. Quality craftsmanship for every project,

• O One Arch Ltd Waltham Cross · Main contractor · 1-9 employees

  One Arch Ltd is a main contractor company based in Waltham Cross, registered at Companies House in 2022.

• O One Build Developments Ltd Wellingborough · Main contractor · 1-9 employees

  One Build Developments is a construction company based in Wellingborough, England. Contact us for your building needs.

• O One Oak Construction Ltd Oxfordshire · Refurbishment · 1-9 employees

  One Oak Construction offers design-led construction, specialising in residential builds and heritage restorations. We deliver high-quality, tailored p

• O One Team Construction Ltd Cradley Heath · Main contractor · 1-9 employees

  ONE TEAM CONSTRUCTION LIMITED is a private limited company based in Cradley Heath, West Midlands. Incorporated in 2022, it operates within the constru

• O Onemore Pro Ltd Harlow · Main contractor

  ONEMORE PRO LTD offers customized digital marketing strategies including SEO, social media, and content creation to boost brand visibility and drive b

• O ONJ Construction Management Westcliff-On-Sea · Main contractor

  ONJ Construction Management is a project management company linking customers with high-quality, precisely managed tradesmen to deliver hassle-free pr

• O Onkar Builders Slough · Main contractor

  Onkar Builders Ltd offers quality building, renovation, electrical, and heating/AC services across London and surrounding counties. Satisfaction guara

• O Onny Developments Ltd Craven Arms · Property developer

  Onny Developments Ltd in Craven Arms, Shropshire is a property development company with expertise in Barn Conversions, New Build Property, Commercial

• O Ontime Contractors Ltd Nottingham · Main contractor · 1-9 employees

  Ontime Contractors Limited is a construction company operating across the UK, offering a wide range of services from new builds to renovations. They f

• O Ontime Heating Ltd Birmingham · Main contractor · 1-9 employees

  Ontime Heating Ltd is a main contractor company based in Birmingham, registered at Companies House in 2020.

• O Onyx Build Ltd Witney · Main contractor · 10-49 employees

  Onyx Build Ltd is a main contractor company based in Witney, registered at Companies House in 2022.

• O Onyx Interiors Birmingham · Main contractor

  Onyx Interiors Facilities Management: Construction and roofing specialists offering turnkey solutions from concept to completion for industrial, comme

• O Opal Access Group Newcastle Upon Tyne · Rail infrastructure · 1-9 employees

  Opal Access Limited delivers facilities management, maintenance, rope access, commercial cleaning, security, workwear, rail and renewables services ac

• O Opal Construction (Nw) Ltd Manchester · Main contractor · 1-9 employees

  100% customer satisfaction in the Greater Manchester area. Specialising in building work including extensions, decking, groundwork, staircases, window

• O Open House Buildings Ltd Birmingham · Main contractor

  OPEN HOUSE BUILDINGS LIMITED (15946568) - company information, filings and financials from Companies House.

• O Open House MCR LTD Manchester · Main contractor · 1-9 employees

  Open House Estate Agent is a property investment company aiming to revolutionise the market through technology, empowering individuals with knowledge

• O Open Plan Living And Construction Ltd Bristol · Main contractor

  Open Plan Living And Construction Ltd is a main contractor company based in Bristol, registered at Companies House in 2022.

• O Open Planned Living Ltd Lowestoft · Main contractor · 1-9 employees

  Open Planned Living Limited is a new company incorporated in July 2024. Further details about their services and specialisms are not yet available.

• O Optic Homes Ltd Northampton · Property developer

  Optic Homes builds, restores and develops residential property across the UK, and delivers turn-key project management for developers and investors.

• O OPTIESTIMATES London · Main contractor

  OptiEstimates offers expert quantity surveying and construction consultancy services in the UK and USA. With over 1000 completed projects, we provide

• O Optimal Developments Ltd London · Main contractor · 1-9 employees

  Builders in King's Lynn with 36 years on the tools. New builds, extensions and renovations across West Norfolk, all backed by our 12-month snagging gu

• O Optimise Construction Ltd Plymouth · Property developer · 1-9 employees

  Optimise Construction Ltd is a new company based in Plymouth, Devon. We are dedicated to providing high-quality construction services.

• O Optimum Bid Services London · Property developer · 1-9 employees

  Optimum Bid Services is a UK-based bid and tender writing consultancy, specialising in helping construction contractors win public and private sector

• O Optimums Design And Build Ltd Worcestershire · Main contractor

  Optimums Design And Build Ltd is a main contractor company based in Worcestershire, registered at Companies House in 2021.

• O Optirooms Service & Construction Southampton · Main contractor

  OptiGroup Holdings Ltd is a UK holding company combining construction (Optirooms), cleaning (OptiClean) and IT & AI systems (OptiSoft).

• O Optivo Developments Ltd Liverpool · Main contractor

  Comprehensive construction & development service to both domestic and commercial clients throughout Liverpool & beyond.

• O Opulent Construction Ltd Hereford · Main contractor · 1-9 employees

  Experienced builders in Hereford specialising in luxury homes, Passivhaus new builds, extensions, and bespoke renovations. High-end construction with

• 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 Orama Contracts London · Main contractor · 1-9 employees

  Orama Contracts is a construction recruitment and subcontracting firm, part of the Orama Group, offering flexible workforce solutions and trade packag

• 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 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 Orbit Developments (Manchester) Ltd Alderley Edge · Property developer

  Orbit Developments is a property development company based in Cheshire, UK.

• 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 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 Yorkshire Ltd Leeds · Main contractor

  Orchard Homes Yorkshire Ltd is a main contractor company based in Leeds, registered at Companies House in 2026.

• 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 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 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 Orlando Stone Ltd Borehamwood · Main contractor · 1-9 employees

  ORLANDO STONE LTD is a company registered in England. The company's website is orlandostone.co.uk.

• 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 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