Main contractors in the UK

20744 UK companies working as main contractors.

• O Octagon Impact Ltd Harrow · Kitchen fitting

  Professional builders in Harrow offering kitchen, bathroom, and decorating services. We transform high-end homes with a personal touch, ensuring custo

• O Octagon Shopfitting & Building Services London · Shopfitting · 1-9 employees

  Octagon Ltd offers shopfitting, bespoke joinery, and fire door services in London and nationwide. Part of The Octagon Group of Companies.

• O Octane Construction Ltd Pudsey · Main contractor · 1-9 employees

  Octane Construction is a UK construction company specialising in commercial construction, design and build, project management, civil engineering, ref

• O Octavius Infrastructure Ltd. Helsby · Civil engineering

  Octavius Infrastructure builds and maintains the roads, railways and transport hubs that keep Britain moving and keeps communities, economies and live

• O Octo Constructions Ltd Slough · Design & build

  Octo Construction Ltd specialises in construction engineering, offering expertise from design and planning through to all construction work. We have a

• O Octopus Dcs Ltd Liverpool · Carpentry & joinery

  Octopus DCS Ltd offers a comprehensive range of property maintenance and joinery services, from bespoke installations to general repairs. They work wi

• O Od Contractors Ltd Huddersfield · Extensions · 1-9 employees

  Building contractors in Huddersfield & West Yorkshire specialising in home extensions, loft conversions & refurbs. Family run, 20 years est. Free surv

• O OD CREATE London · Fit-out & interiors · 10-49 employees

  Award-winning office fit-out company delivering both turnkey design and build projects and traditional fit-out contracts.

• O Odella Ltd Bridgwater · Bricklaying

  Odella Ltd offers expert bricklaying and building services for commercial and domestic clients, specializing in substructure and superstructure projec

• O Odg Construction Ltd Petts Wood · Groundworks · 1-9 employees

  ODG Construction is a UK-based construction company specializing in groundworks, formwork, reinforcement, and concrete finishing for domestic and comm

• O ODIN Construction Seaham · Design & build

  ODIN Construction offers professional building services across the North East, specialising in turnkey solutions for domestic and commercial clients.

• O ODM Services Gravesend · Heating & ventilation · 10-49 employees

  Award winning company delivering commercial heating, plumbing and mechanical projects across London and the South East.

• O Oep Services Ltd Luton · Main contractor

  OEP Services offers professional construction and general trading solutions. With a focus on integrity, excellence, and customer satisfaction, we deli

• O OFF GRID DEVELOPMENTS LTD Hastings · Solar PV

  Expert construction, renewable energy services and drone surveys in East Sussex. Building sustainable solutions for a greener future.

• O Office Insight Ltd Altrincham · Design & build

  Office Insight offers office design, fit out and refurbishment services to rejuvenate workplaces and enhance staff productivity. We create brand-defin

• O Office4Garden London · Design & build

  Bespoke garden offices designed for productivity and built to last. We offer a stress-free, end-to-end service, delivering exceptional quality and fun

• O Offthebreeze Ltd Northampton · Design & build · 1-9 employees

  Specialists in designing and building high-performance veterinary clinics, hospitals, and laboratories across the UK.

• O OFI Contracts Ltd Penrith · Cladding · 1-9 employees

  OFI Contracts Ltd delivers expert construction, cladding, and fire protection services nationally & internationally. Trusted, quality-driven, on time.

• O Ofstrand Ltd Essex · Fit-out & interiors

  Ofstrand is a construction and fit-out company offering diversified services with superior quality, covering London & South-East England. They special

• O Og Civils Ltd Beverley · Groundworks

  OG Civils Ltd is a leading groundworks and civil engineering company based in Beverley, East Riding of Yorkshire. With over 19 years of experience, we

• O Og Conversions Ltd Dunmow · Loft conversions

  OG Conversions Ltd - loft conversion specialists serving Essex, Hertfordshire and Cambridge. We offer exceptional loft conversion services in Saffron

• O OG Design & Build Ltd Kingston Upon Thames · Design & build

  OG Design & Build Ltd offers professional and experienced building services in Kingston upon Thames, handling all aspects of building projects. Expand

• O Ogb Projects Ltd London · Refurbishment

  OGB Projects offers expert refurbishment services for residential and commercial properties in London, specializing in high-end bathroom fitting and m

• O Ogbourne Construction Services Ltd Marlborough · Main contractor · 1-9 employees

  OGBOURNE CONSTRUCTION SERVICES delivers quality residential building and project management from concept to completion with professionalism and reliab

• O Oggeretti Ltd London · Loft conversions · 1-9 employees

  South London construction company recognised for fostering innovation and embracing emerging technologies. Undertakes small to large complex residenti

• O Oggy Builder Ltd London · Kitchen fitting · 1-9 employees

  Oggy Builders delivers reliable building and renovation services, including kitchens, bathrooms, extensions, and landscaping. Trusted craftsmanship wi

• O Ogilvie Construction Ltd Stirling · Main contractor · 1-9 employees

  One of Scotland's top 10 building contractors and construction companies, with a proven track record in the construction of commercial, public, indust

• O Ogilvie Ground Works Ltd Brechin · Groundworks

  Ogilvie Ground Works Ltd, Expert Groundwork Engineers in Brechin. Providing quality drainage, driveways, and landscaping services across Angus.

• O Ogilvie Group Stirling · Main contractor

  Ogilvie Group is a family-owned business established in 1953, supporting industries including construction, home-building, vehicle management, IT, and

• O Ogilvie Homes Ltd Stirling · House builder · 50-249 employees

  Ogilvie Homes is a family-run house builder based in Stirling, Scotland, established in 1985. They focus on creating high-quality new homes in desirab

• O Ogival Ltd London · Refurbishment

  Ogival offers professional property modifications and alterations, including refurbishments, basements, extensions, and loft conversions. With a desig

• O Ohmega Construction Abbots Langley · Refurbishment

  Ohmega Construction: Your trusted partner in building better homes. Specialising in kitchens, refurbishments, and extensions, we bring your ideas to l

• 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

• O OHOB Morden · Groundworks

  O'Halloran & O'Brien (OHOB) is a respected UK construction group with over 50 years of experience, delivering complex, multi-disciplinary projects acr

• O Oilcanfinish Outdoor Living London · Fencing

  Wimbledon Composite Decking Company specialising in Trex & Millboard. Outdure Aluminium Decking Frame Installer. Inlite Installer.

• O Ojg Joinery & Construction Ltd Leeds · Carpentry & joinery

  OJG Joinery & Construction Ltd are reliable joinery and construction specialists in Leeds, offering a wide range of services for commercial and reside

• O OJN Building & Roofing Ltd Walsall · Extensions

  Reliable building and roofing company based in Walsall, serving Aldridge, Birmingham, Cannock, and surrounding areas. Specialising in extensions, bric

• O Oka Carpentry Ltd Newton Abbot · Carpentry & joinery

  Oka Carpentry Ltd offers expert carpentry, home renovations, shop fitting, and fire door installations for residential and commercial clients in Torqu

• O Okaro Construction Ltd Maidstone · Extensions

  Okaro Construction delivers exceptional building services, transforming spaces with expertise in extensions, renovations, landscaping, driveways, and

• O Okemb Services Ltd Sheffield · Refurbishment

  Okemb Services Limited offers quality, reliability, and agility in home renovation and building projects, with a personal approach to client collabora

• ö öKohaus Cornwall Ltd St. Columb · House builder · 1-9 employees

  Ökohaus Cornwall builds certified Passivhaus and high performance homes using natural and sustainable materials. We work closely with architects from

• O OL and Edward Ltd London · Refurbishment · 1-9 employees

  Design-led home renovation, kitchen fitting, bathroom renovation, loft conversions and full refurbishment services across London. Fully insured, accre

• O Olaaya Ltd London · Refurbishment

  OLAAYA LTD is a London-based construction and property finishing company specializing in domestic buildings. They offer comprehensive services from ne

• O Old Bells Construction & Demolition Ltd Stowmarket · Civil engineering · 10-49 employees

  Old Bells Construction & Demolition offers a range of services including civil engineering, groundworks, demolition, and marine works. They cater to d

• O Old Bucks Developments Old Buckenham · House builder · 1-9 employees

  Old Bucks Developments design and build small developments of luxury homes, from new builds to redevelopments, within the Norfolk & Suffolk area.

• O Old English Paving Kidderminster · Driveways & paving

  Old English Paving installs block paving, tarmac and resin driveways plus patios across Worcestershire and Herefordshire. Free site surveys.

• O Old Oak Carpentry Ltd Southampton · Carpentry & joinery

  Old Oak Carpentry is a trusted, family-run business in Hampshire, dedicated to delivering home improvement services to the highest standard. We transf

• O Old School Roofing Ltd London · Roofing

  Old School Roofing Ltd offers authentic, reliable roofing services with over 25 years of experience. Specialising in new roofs, repairs, and flat roof

• O OLD-Homes Cheltenham · Property developer

  OLD-Homes is a property development company focused on value-add residential opportunities in Oxfordshire, targeting 40%+ returns on cost through stra

• O Oldbury'S Building Restorations Ltd Exmouth · Restoration & heritage · 1-9 employees

  Oldbury's Building Restorations Ltd: Experts in brick and stonework restoration in Exeter, Devon, and the Southwest. Call 01395-262200 to learn more.