Main contractors in the UK

6990 main contractors listed from the UK register.

• I Initial Systems Ltd Ashford · Main contractor

  Initial Systems is a construction company in the South East. Sectors include education, commercial, healthcare & highways with a focus on sustainabili

• I Innovate D&B Ltd Billingham · Main contractor · 1-9 employees

  Innovate Design and Build Ltd is a family-owned construction firm based in Billingham, Stockton-on-Tees. We offer a comprehensive approach to construc

• I Innovate Design And Build Ltd Loughton · Main contractor · 1-9 employees

  Innovate Design And Build Ltd is a main contractor company based in Loughton, registered at Companies House in 2019.

• I Innovation Construction And Development Ltd Brentwood · Main contractor · 1-9 employees

  Innovation Construction and Development offers high-quality construction services in Essex, including new builds, house extensions, loft conversions,

• I Innovation Construction Design & Build Ltd London · Main contractor · 1-9 employees

  Houzz is a platform for construction and design professionals, offering marketing, CRM, and project management tools. It connects homeowners with pros

• I Innovation Construction Group Manchester · Main contractor · 1-9 employees

  Innovation Construction Group is a Manchester-based leader in building bespoke and exclusive properties, combining modern techniques and innovative de

• I Innovation Experts Ltd London · Design & build

  Innovation Experts Ltd offers premium construction & renovation services in London, providing reliable, high-quality refurbishment, repair, and mainte

• I Innovative Build Ltd Bridgwater · Main contractor

  Professional, experienced builders in Somerset, delivering quality construction services with a focus on reliability & customer satisfaction.

• I Innovative Developments Waterlooville · Refurbishment

  Innovative Developments is your trusted construction partner, providing high-quality construction services for all your needs. With 25+ years of exper

• I Inproject Construction Ltd Wembley · Design & build

  Discover top-notch residential builders at INPROJECT CONSTRUCTION Ltd. We specialize in design build construction tailored to your needs.

• I Inseen Construction Ltd Southend-On-Sea · Main contractor · 10-49 employees

  Inseen Construction Limited is a well-established construction and management company in the UK, known for its competence, teamwork, and high levels o

• I Insight Planning & Design Ltd Witney · Main contractor

  Insight Planning & Design Ltd is a main contractor company based in Witney, registered at Companies House in 2025.

• I Inspace Construction Group Ltd Northampton · Main contractor · 10-49 employees

  InSpace Construction are specialists in general building and property maintenance for private and commercial clients. Preferred installer for B&Q.

• I Inspire Concepts Ltd Southall · Main contractor · 1-9 employees

  Inspire Concepts Ltd is a company registered in England. Their website is currently under development.

• I Inspire Property (Jk) Ltd Littlehampton · Refurbishment · 1-9 employees

  Inspire Property Ltd is a family-run building company established in 2010. We provide building, refurbishment and property development services all th

• I Inspired Homes & Build Ltd Leeds · Main contractor · 1-9 employees

  Inspired Homes & Build Ltd is a main contractor company based in Leeds, registered at Companies House in 2020.

• I Inspiring Construction Ltd Wirral · Carpentry & joinery · 1-9 employees

  Inspiring Construction Ltd is a new company based in Wirral, UK. We are dedicated to providing high-quality construction services.

• I Instyle All Trade Paisley · Fire protection · 10-49 employees

  Instyle All Trade delivers comprehensive trade services across all sectors, specializing in expert craftsmanship and fire protection. We ensure high-q

• I Intec Commercial Ltd Croydon · Main contractor

  INTEC COMMERCIAL LIMITED is a company registered in the UK. Their website is currently unavailable.

• I Integrum Construction Ltd Paignton · Main contractor

  Integrum Construction is a family-run business offering complete construction services in Devon and Cornwall, South-West UK. From drawing board to 'fo

• I Intelitrade Developments Ltd London · Property developer · 1-9 employees

  Intelitrade Developments is a Real Estate Development and Principal Contractor company based in Central London, specialising in high-end residential p

• I Intelle Construction Ltd Pontypridd · Main contractor

  Intelle Construction is a construction company founded by senior professionals, experienced in managing complex projects across new build, refurbishme

• I Interclass Public Ltd Company Wolverhampton · Main contractor

  Interclass is a family-owned, Midlands-based UK construction business with 50 years of experience. They offer new build, design & build, extension, an

• 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 Interior Lab Ltd. Petersfield · Main contractor

  InteriorLAB are a main contractor specialising in delivery for prime residential and commercial property sectors.

• 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 Interiors UK Ltd Huddersfield · Shopfitting · 50-249 employees

  The UK's leading commercial interior shopfitters to the restaurant, retail and leisure sectors.

• I Interkey Contracting Ltd Corby · Main contractor

  Interkey Contracting Ltd, Expert construction solutions for stadiums, commercial developments, industrial facilities, and food and beverage projects a

• 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 Intervention Services Ltd Pontyclun · Main contractor · 10-49 employees

  Intervention Services Limited are a well established, medium sized, company in South Wales who are privately owned and work together with major contra

• I Intrinsic Construction Ltd Glasgow · Main contractor · 1-9 employees

  Intrinsic Construction: Delivering complex projects across Scotland with a focus on safety, quality, and reliability. Your trusted partner for constru

• I Invertay Construction Ltd Dundee · Main contractor

  Invertay Construction Ltd is a main contractor company based in Dundee, registered at Companies House in 2020.

• I Investimmo Construction Ltd Wigan · Property developer

  Investimmo Group is a UK-based real estate development company specialising in renovations and new build projects over 1,000 sqm.

• 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 Ip Building Ltd Tonbridge · Extensions

  IP Building has over 35 years of experience in building and transforming homes in Kent. We specialise in extensions, driveways, patios, and new builds

• i iPhorms Birmingham · Main contractor · 1-9 employees

  Iphorms Ltd offers a fixed, low monthly cost for its services, with UK-based support, zero contracts, unlimited users, submissions, and amendments. Ex

• 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 Ipsum (UK) Ltd Nottingham · Main contractor · 1-9 employees

  Ipsum (UK) Ltd is a leading building contractor in Nottingham and the East Midlands, offering quality building services for residential, public sector

• I Ipswich Accident Repair Centre Ipswich · Main contractor · 10-49 employees

  Ipswich Accident Repair Centre offers minor to major body repairs on cars, vans, motorhomes, caravans, and light commercial vehicles. Approved by manu

• I IrishTrade Federation Belfast · Main contractor

  The Irish Trade Federation is a business directory promoting companies in Ireland. We offer Irish tendering facilities, Business Classifieds and Debt

• 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 Isa Building Ltd Aylesbury · Main contractor · 1-9 employees

  ISA Building offers over 25 years of experience in construction and renovation, dedicated to quality craftsmanship and client satisfaction. They make

• 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 Island Facility Services Ltd Newport · Electrical · 10-49 employees

  IFS Property Services offers a comprehensive range of commercial and domestic property services on the Isle of Wight, including bathrooms, kitchens, d