Main contractors in London

2659 construction main contractors based in and around London.

• 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 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 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 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 Ogival Ltd London · Refurbishment

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

• O Oilcanfinish Outdoor Living London · Fencing

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

• 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 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 Ols T Construction Ltd London · Drylining · 1-9 employees

  OLS T Construction offers professional construction services with hands-on expertise in London, specializing in high-quality finishing trades and refu

• O Olympus Property Group Ltd London · House builder · 1-9 employees

  Olympus Property Group offers expert residential construction and surveying services in Hampshire, including new builds, renovations, loft conversions

• O Omega + Group Ltd London · Main contractor · 1-9 employees

  Omega Group is a leading construction and MEP contractor based in West London, delivering high-value projects across residential, commercial, and mixe

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

  OMFC Ltd is a construction company based in London, undertaking a variety of projects across residential and commercial sectors. They focus on deliver

• O Omikon Construction Ltd London · Design & build

  Omikon Construction Limited is a London-based construction company offering quality, reliable, and sustainable services. We combine innovation and exp

• 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 On Time Builders Ltd London · Refurbishment · 1-9 employees

  Ontime Builders Ltd specialises in high-end full refurbishment, renovation, bathrooms, kitchens, painting, decorating, plumbing, electrical repairs, e

• O One Bloomsbury Ltd London · Extensions

  One Bloomsbury is a London-based construction and building company offering bespoke design, construction, and maintenance services for residential and

• 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 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 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 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 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 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 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 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 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 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 Ostconstruct1 Ltd London · Bricklaying

  Serious craftsmanship, fair prices, fast completion. Specialists in brickwork, masonry, extensions and exterior works for residential and commercial p

• O Otterburn Construction Ltd London · Refurbishment · 1-9 employees

  Otterburn Construction provide exceptional construction services, with a skilled and experienced team committed to delivering results that exceed expe

• O Otters Group Ltd London · Refurbishment · 1-9 employees

  Otters Group is a family-owned construction business established in 2018, providing expert residential and commercial services including renovations,

• O Outlook Roofing Ltd London · Roofing

  Outlook Roofing Ltd specialises in UPVC, roof repairs, new roofs, rubber, felt, and GRP fibreglass flat roofs in London.

• O Ovadia Construction Ltd London · House builder

  Ovadia Construction Ltd offers extensions, renovations and new builds with expert craftsmanship. Looking for a trusted construction company in the UK?

• O OVIDIU PREMIER JOINERY & CARPENTRY LTD London · Shopfitting

  Ovidiu are a premium shopfitting and carpentry company who have worked with the biggest clients in Mayfair, Bond Street in London, and throughout the

• O Ovk Construction Ltd London · Main contractor · 1-9 employees

  OVK Construction offers Building and Maintenance services: Interior and Exterior renovation, Plumbing and Electrics, Extensions, Loft Conversions and

• O Oytas UK London · Civil engineering

  Oytas UK is the London branch of Oytas Construction, established in Turkey in 1992. Leveraging 30 years of experience, we specialise in concrete, pref

• O Ozone Buildworld Ltd London · Plumbing · 1-9 employees

  Ozonebuildworld Ltd offers premium property maintenance services across the UK, including plumbing, electrical, carpentry, and painting. Contact us fo

• O Ozzy Development Ltd London · Refurbishment · 1-9 employees

  Ozzy Development Ltd is a London-based company specializing in property development and construction services, including refurbishments and fit-outs.

• P P & C Builders Brothers Ltd London · Refurbishment · 1-9 employees

  London based P&C Builders Brothers Ltd specialise in maximising home space with loft conversions, extensions & renovations, offering expert Italian-st

• P P.A. Finlay & Company Ltd London · Main contractor · 10-49 employees

  We collaborate with forward thinking clients to deliver assured, long-term value in their built assets. P A Finlay & Co Ltd offers construction and ma

• P P.I.V Building Solution Ltd London · Refurbishment

  Expert construction, renovation & refurbishment services in London. 8+ years experience, 500+ projects completed. From home extensions to electrical w

• P P&T Building Ltd London · Main contractor · 1-9 employees

  P&T Building Limited is a construction company founded in 2015, undertaking commercial, government, and private building projects.

• P P&V Construction Ltd London · Refurbishment · 1-9 employees

  P&V Construction Limited is a reliable and friendly construction company based in Barnes, London, offering high-quality services from refurbishments t

• P P4 Construction Services London · Design & build · 1-9 employees

  P4 Services is a Surrey construction company offering complete builder services from initial designs to completed projects. Specialists in house exten

• P P6 Planning Ltd London · Main contractor

  Expert project management, planning, and project control solutions for complex infrastructure projects across the UK. Decades of experience in high-va

• P Pac Services Ltd London · Refurbishment

  PAC Services Ltd specialises in commercial and residential refurbishment and maintenance, offering joinery, drylining, tiling, and kitchen fitting ser

• P Pacho Create Ltd London · Extensions

  Pacho Create specialises in high-end luxury home improvements, including home extensions and loft conversions for residential customers in London. The