Main contractors in London

1935 main contractors across London.

• I Interfix Services Ltd Bookham · Refurbishment · 1-9 employees

  Interfix Services Ltd, formed in 2004, specialises in project management and installation services, primarily within airports and educational faciliti

• I Interholc Construction Ltd London · Main contractor

  Interholc Construction is a London-based building company with a strong reputation in residential, commercial, retail, hotels, and leisure sectors. Th

• I Interhome Construction Ltd London · Main contractor

  Interhome Construction Ltd offers bespoke residential and commercial construction services in London, managing projects from new builds to renovations

• I Interiors Services Ltd London · Main contractor

  Interiors Services Ltd is a main contractor company based in London, registered at Companies House in 2021.

• I Interskills Solutions Ltd London · Main contractor · 1-9 employees

  Construction company in London specialising in extensions, loft conversions, renovations, kitchen and bathroom installations, and property refurbishme

• I Investre Construction Ltd London · Property developer · 1-9 employees

  Investre Construction Ltd is a property developer company based in London, registered at Companies House in 2022.

• I Investre Ltd London · Property developer

  London-based property investment and development business focused on Prime Central London, Kensington, Chelsea, Mayfair, Marylebone, Bayswater, Knight

• I Ioluri Pro Ltd East Ham · Main contractor

  Providing trusted construction management, extensions, refurbishments, and building maintenance with care for your home or business.

• I Iplan Construction & Consultants Ltd London · Civil engineering · 1-9 employees

  Iplan Construction & Consultants Ltd. offers expert planning, scheduling, and project management services led by an experienced civil engineer. Delive

• I Ironbuild Construction Ltd London · Fit-out & interiors

  London's trusted retail and commercial construction company. 200+ projects delivered. Fit-outs, new builds, refurbishments. Request a quote today.

• I Ironpeak Builders Ltd London · Main contractor

  IRONPEAK BUILDERS LIMITED is a new company incorporated on 8th July 2025. The company is based in London.

• I Iropeaccess Ltd London · Scaffolding

  Specialist rope access company providing work-at-height services across London and the UK. IRATA certified. Get a free quote today.

• I Iskcon Construction Ltd Edgware · Refurbishment · 1-9 employees

  Iskcon Construction Ltd is a local and trusted building company in Edgware, offering a wide range of professional, reliable, and friendly services tai

• I Iuind Ltd London · Main contractor · 1-9 employees

  Building Specialists | Tailored Solutions for Homes, Businesses, and Industrial Spaces! Fixed Price Projects, Quality and Standards, Precision Plannin

• I Iwik Construction Ltd London · Main contractor

  Iwik Construction is a well-established building company in Southwest London, offering a full range of construction and renovation services. They prid

• J J & L Construction Ltd London · Extensions · 1-9 employees

  J & L Construction Ltd are your local experts for all building services in Valley Side, Waltham Forest, London. From extensions through to complete re

• J J Champion Consulting Ltd London · Main contractor · 1-9 employees

  Champion Consulting provides project management and commercial services to the construction industry, specialising in estimating, cashflow forecasting

• J J-Telecom Corp Ltd London · Main contractor

  J-Telecom - Leading International Telecommunications Company. Breaking borders through robust infrastructure.

• J J.P.F. Clarke (Construction) Ltd London · Main contractor

  JPF Clarke is a family-run construction company with over 40 years of experience in North London. They offer a comprehensive range of building service

• J J.S.F.Construction Ltd Romford · Main contractor · 1-9 employees

  J.S.F Construction Ltd is an experienced construction company specialising in renovation, new builds, refurbishments, extensions, rooftop development,

• J J.W. Cannon & Co. (1948) Ltd Surrey · Main contractor

  A family-run building firm established over 70 years, JW Cannon & Co Ltd offers a wide range of building services including new builds, extensions, an

• J J3 Design & Build Ltd West Drayton · Main contractor

  J3 Design & Build Ltd is a main contractor company based in West Drayton, registered at Companies House in 2025.

• J Jad1 Construction Ltd London · Main contractor · 1-9 employees

  JAD1 Construction is a dynamic construction company offering a wide range of services including electrical, plumbing, carpentry, and extensions. We ar

• J Jamin Interior Ltd Dagenham · Main contractor · 1-9 employees

  JAMIN INTERIOR LTD (12389069) - company information, filings and financials from Companies House.

• J Jan Construction Ltd Isleworth · Main contractor · 1-9 employees

  Jan Construction Ltd provides reliable, high-quality construction and building services across London. We are committed to excellent workmanship, atte

• J Jass Construction Ltd Feltham · Main contractor · 1-9 employees

  JASS CONSTRUCTION LTD provides top-tier Android App Development and modern construction solutions, building the future digitally and physically.

• J Jaysam Contractors Ltd Middlesex · Main contractor · 50-249 employees

  Jaysam Contractors Limited is a construction company based in Middlesex, UK. The company's website is currently unavailable.

• J Jaysam Developments Borehamwood Ltd Wealdstone · Main contractor

  Jaysam Developments Borehamwood Ltd is a main contractor company based in Wealdstone, registered at Companies House in 2014.

• J Jaysam Developments Wembley Ltd Harrow · Main contractor

  Jaysam Developments Wembley Ltd is a main contractor company based in Harrow, registered at Companies House in 2014.

• J Jazz Construction London Ltd London · Main contractor

  Jazz Construction is a leading construction company in London offering a wide range of building and construction services. Established in 2019, we are

• J Jb Maquina Ltd London · Main contractor

  JB Maquina Ltd offers expert construction services and wholesale premium machine tools with a fresh, modern approach. Innovating since 2024, we delive

• J JC London Construction London · Main contractor

  JC London Construction delivers high-quality services from conception to completion for major renovations and small jobs. They assist with planning ap

• J Jcps London Ltd Loughton · Refurbishment

  Reliable and professional construction company specialising in high-quality refurbishment and renovation projects for residential and commercial prope

• J Jdp Construction Ltd Hornchurch · Demolition · 1-9 employees

  JDP Construction LTD is a London-based structural contractor specializing in major residential and commercial projects. Services include demolition, g

• J Jewel Bespoke Build Ltd Surbiton · Main contractor

  Jewel Bespoke Build Ltd is a main contractor company based in Surbiton, registered at Companies House in 2021.

• J Jf Construction Ltd London · Main contractor · 1-9 employees

  Whether you're looking for a new build, an extension, or a bespoke refurbishment, we ensure every project is completed with quality craftsmanship and

• J Jhd Builders Ltd London · Main contractor

  JHD Builders Limited is a building contractor with over 30 years of experience, specialising in maintenance, refurbishment, Venetian plastering, and f

• J Jj Construct Ltd Epsom · Main contractor

  JJ Construct is a London-based construction company offering loft conversions, refurbishments, new builds, and project management. Trusted for quality

• J Jj Rhatigan & Co. (UK) Ltd London · Main contractor

  JJ Rhatigan is a leading main contractor at the forefront of the construction industry for over 65 years, combining speed and quality across a diverse

• J Jjo Construction Ltd Mitcham · Refurbishment · 1-9 employees

  A reputable, family-run business specialising in delivering exceptional private and commercial property refurbishments and construction projects acros

• J JMC Construction 4UK Ltd Waltham Cross · Main contractor · 1-9 employees

  Professional Essex & Hertfordshire Builder offering top-quality construction and renovation services. Expert craftsmanship and reliable service. Conta

• J Jmg Vata Construction Ltd Uxbridge · Main contractor

  JMG VATA Construction Ltd is a full service Construction Company dedicated to building and improving residential and commercial structures according t

• J Jo-Jim Consult Ltd Dartford · Civil engineering

  Jo-Jim Construction offers unparalleled management, engineering, and development consultancy services. We extend our delivery in construction to civil

• J Joa Consult Ltd London · Main contractor · 1-9 employees

  JOA Consult Ltd is a premier HR consulting firm offering tailored human resources solutions across the UK, including HR Healthcare, Outsourcing, Recru

• J Job Fix Ltd London · Main contractor

  Job Fix Ltd is a leading General Builder and Construction Company in London, specializing in premium kitchen and bathroom installations. We deliver hi

• J Johflek Global Ltd London · Design & build

  Johflek Construction is a leading design & build company in London, specialising in high-end, contemporary modern architectural design and structures.

• J John Cirmaci Builders Ltd Harrow · Refurbishment · 1-9 employees

  John Cirmaci Builders Ltd specialises in hotel refurbishments, new builds, and extensions. With over 16 years of experience and a reputation for quali

• J Jon Davids Construction LTD Borehamwood · Main contractor · 1-9 employees

  Jon Davids Construction offers building services across London and Hertfordshire, specializing in structural work, refurbishments, extensions, and new

• J JP Project Management London · Refurbishment · 1-9 employees

  JP Project Management is a London-based construction firm providing high-quality residential and commercial building services, renovations, and mainte

• J Jr Builders London Ltd London · Main contractor · 1-9 employees

  JR Builders London Ltd is a construction company based in London, England.