Main contractors in the UK

20744 UK companies working as main contractors.

• O One Stop Property London · Refurbishment · 1-9 employees

  London's All-in-One Property Services: Management, Renovations, and Much More. We offer turnkey delivery, eco-friendly solutions, and high-end finishe

• 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 ONEFIX Services Ltd Solihull · Refurbishment

  ONEFIX Services is a reliable home improvement company specializing in renovations, refurbishments, extensions, and conservatories, alongside expert p

• O Onit Building Services Ltd Northwood · Plumbing

  ONit Building Services offers emergency plumbers and electrical installation services in Northwood, Buckinghamshire. Reliable, efficient, and certifie

• 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 Onpoint Roofing And Guttering Ltd Hove · Roofing

  Onpoint Roofing and Guttering Ltd is a trusted provider of roofing and guttering services across the South Coast, including Brighton, Eastbourne, and

• O Onsite Construction Ltd London · Painting & decorating · 1-9 employees

  London Onside Construction provides a comprehensive range of building services, specializing in home extensions, loft conversions, and steel construct

• O Onsite Developments Design & Construction Ltd Wallington · Design & build · 1-9 employees

  Onsite Developments Design & Construction Ltd is a fast-growing construction, design and development business with 25 years of experience. We undertak

• O Onslow Construction Group Ltd Guildford · Refurbishment · 1-9 employees

  Onslow Construction is a Surrey-based building company specialising in high-quality home renovations and extensions. They offer a professional and per

• O Onslow Roofing & Building Services Ltd Belfast · Roofing

  Trusted Belfast Roofers with over 30 years of experience. Offering reliable, fully insured roofing solutions and building services with award-winning

• 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 ONTRACK ROOFING & BUILDING LTD Worcester · Roofing

  Ontrack Roofing & Building Ltd offers professional roofing solutions in Birmingham and surrounding areas, focusing on quality materials, skilled workm

• O Onyx Civils Ltd Motcombe · Civil engineering

  Onyx Civils Limited is a groundworks and civil engineering company based in Dorset, operating as a main and principal contractor throughout the South

• 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 Onyx Solutions Ipswich · M&E contracting

  Onyx Solutions Ltd is a trusted provider of building and facilities services, delivering high-quality solutions across the region. Part of the EPPH Gr

• 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 Opalux Group Ltd Gloucester · Electrical

  Opalux Group provides expert electrical, mechanical and construction services across Gloucestershire and The Cotswolds.

• O Opek Home Ltd. London · Refurbishment · 1-9 employees

  London based Architecture, Construction & Supply company specialising in Conversions, Extensions and New Builds for Private and Commercial sectors.

• O Open Exhibitions Ltd Warwick · Design & build · 1-9 employees

  Creative Exhibition Design & Build. We design, build, and project manage bespoke exhibition stands and event environments for brands across the UK and

• O Open House Buildings Ltd Birmingham · Main contractor

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

• O Open Plan Renovation Colchester · Refurbishment

  Discover top-tier Open Plan Renovations with Open Plan Renovation Ltd in Colchester. Specializing in home extensions, loft conversions, and comprehens

• O Open Space Concepts Ltd Crewe · Design & build

  Open Space Concepts is the UK's leading designer and installer of bespoke outdoor living structures, transforming gardens into year-round spaces. With

• O Opta Service Ltd Croydon · Fit-out & interiors · 1-9 employees

  Opta Service is a London-based facilities management company specialising in construction, maintenance, and office relocations for commercial clients.

• O Optera Ltd Coventry · Damp proofing · 10-49 employees

  Optera are leading structural repair specialists, working in the domestic insurance sector. We pride ourselves on understanding our clients' needs and

• 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 Optility Ltd Cradley Heath · Utilities · 10-49 employees

  Optility Limited delivers comprehensive infrastructure solutions across the UK, specializing in civil engineering, multi-utility projects, and telecom

• O Optima Property Services Ltd Clevedon · Painting & decorating

  Optima Property Services Ltd. Superior commercial decorators based in the South West. Excellent service at competitive rates.

• O Optimal Build Ltd London · Refurbishment · 1-9 employees

  Optimal Build Ltd is a London-based construction company specialising in residential and commercial projects, including refurbishments, extensions, an

• O Optimal Builders Ltd Grays · Loft conversions · 1-9 employees

  Optimal Builders offers a range of construction services including loft conversions, house extensions, refurbishments, and garden renovations. They fo

• 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 Optimal Finishes Ltd Chigwell · Refurbishment · 1-9 employees

  Top Rated Construction Company in London. We offer Full Management on Projects our services include Full Home Renovations, Offices, Full Bathroom Fitt

• O Optimal Group Nw Ltd Chester · Roofing

  Optimal Group NW Ltd offers expert roofing and maintenance services for domestic and commercial properties, specializing in repairs, installations, an

• O Optimal Interiors Maidstone · Refurbishment

  Optimal Interiors Limited offers professional home refurbishment services including kitchens, bathrooms, tiling, plastering, and underfloor heating ac

• O Optimal Property Maintenance London · Refurbishment · 1-9 employees

  Optimal Property Maintenance offers a comprehensive range of property maintenance services, including refurbishment, painting, roofing, electrical, an

• O Optimo Build Co Ltd Peterborough · Extensions · 1-9 employees

  Optimo Build Co Ltd is a trusted building contractor specialising in home extensions, conversions, new builds, brickwork and stone masonry in Northamp

• O Optimodo Ltd Hemel Hempstead · Refurbishment

  Optimodo Limited, established in 2009 and based in Hemel Hempstead, offers professional building services in Hertfordshire and surrounding areas. We p

• O Optimum Carpentry Solutions Ltd Gloucester · Carpentry & joinery · 1-9 employees

  Optimum Carpentry Solutions Ltd offers comprehensive carpentry and joinery services in Gloucestershire and the Cotswolds. Established in 2019 with 22

• O Optimum Construction Ltd Yeovil · House builder · 1-9 employees

  Prestigious builder of Impressive Luxury New Houses and Extensions in & around Wokingham, Berkshire. Specialising in large, bespoke houses.

• O Optimum Electrics Ltd Peterborough · Electrical

  Optimum Electrics is a leading UK solar and electrical company based in Peterborough, providing hassle-free solar and electrical services for commerci

• O Optimum Group Bristol · Drylining · 50-249 employees

  Optimum Group is a leading specialist contractor in the South West and South Wales, with a reputation for quality and service. Founded in 1999, the gr

• O Optimum Structures Ltd Guildford · Modular & offsite construction

  Optimum Structures is the exclusive UK partner for DBS Engineering, supplying and installing pre-engineered air supported and frame buildings across t

• O Optimus Facilities Ltd Liverpool · M&E contracting

  Optimus Facilities: Your Building Services & Engineering Partner. Specialising in mechanical & electrical systems design and installation across the N

• O Option One London · House builder

  Option One helps landowners across Kent, Surrey, Sussex, Essex and the South East unlock the true value of their land. Free land assessment. Zero cost

• O Options Energy Services Ltd Harlow · Civil engineering · 10-49 employees

  Options Energy Services is an independent civil engineering contractor delivering utility infrastructure, energy, telecoms and traffic management serv

• 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 Optisol Services Ltd Cheshire · Solar PV · 10-49 employees

  Optisol Services is a leading UK solar farm cleaning company, delivering professional solar panel cleaning services for commercial solar farms across

• 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