Companies beginning with O

1035 companies listed alphabetically.

• O Oscar Onsite London · Insulation

  Oscar Onsite offers independent cavity wall insulation surveys and reports for homeowners, landlords, and lenders across the UK. Book a survey today.

• O Oscrete UK Ltd Bradford · Concrete works · 10-49 employees

  Leading UK manufacturer of concrete admixtures and performance additives, trusted by manufacturers, contractors and specifiers. Over 40 years experien

• O Osflow Ltd Oswestry · Plumbing

  Osflow LTD is a Gas Safe registered plumbing, heating and gas engineering business serving Oswestry, Wrexham and surrounding areas. Offering boiler in

• O OSL Global Crewe · Rail infrastructure · 50-249 employees

  OSL Global provides optimised engineering and consultancy services for rail systems, water treatment, waste management, and AI integration, delivering

• O Osmonds Timber Ltd Uckfield · Timber frame · 1-9 employees

  Osmonds Timber Limited: Importers and distributors of high-quality timber products, specialising in Oak from sustainable French forests. Over 10 years

• O Osmonds Transport And Planing Ltd Gillingham · Road surfacing · 10-49 employees

  Osmonds Transport & Planing Ltd offers high-quality road planing and milling services across the South East of England, operating a fleet of 15 machin

• O Osmose Hudderfield · Utilities

  Osmose Utilities Services provides solutions for T&D networks, focusing on asset preservation, structural resiliency, and data-driven decision-making

• O Osn Development Ltd Hayes · Main contractor

  OSN Development Limited is a construction company based in Hayes, England, offering a wide range of expert home improvement and building services. The

• O Osp Building Ltd Cambridge · Bricklaying

  Dependable bricklaying company with many years of experience in building homes. Trust an analytical mind for your building works.

• O Osprey Charging Network Ltd Canterbury · EV charging · 10-49 employees

  Osprey provides drivers with high-power rapid electric vehicle charging in a convenient and thoughtfully placed charging network, across the UK.

• O Osprey Electrical And Av Ltd Ashford · Electrical · 1-9 employees

  Osprey Electrical offers comprehensive domestic, commercial, and industrial electrical services, including design, installation, testing, CCTV, home t

• O Osprey Heating And Plumbing Ltd Dumbarton · Plumbing

  Need a reliable local engineer? Osprey Heating And Plumbing Ltd offers professional heating and plumbing services in Cardross, handling breakdowns, re

• O Osprey Homes (South East) Ltd Stevenage · House builder

  Osprey Homes is an award-winning developer building high-quality homes across the Home Counties. Known for distinctive designs and meticulous attentio

• O Osprey Homes (South) Ltd Stevenage · Property developer

  Osprey Homes (South) Ltd is a property developer company based in Stevenage, registered at Companies House in 2013.

• O Osprey Tunnels Ltd Perth · Design & build

  Osprey Tunnels specialises in advanced polytunnels, greenhouses, and integrated growing systems. They offer turnkey solutions for various horticultura

• O Osprey Windows Ltd Hawarden · Windows & doors · 10-49 employees

  Osprey Windows Ltd. Double Glazing Windows, Doors, Conservatories, Roofline. Quality, service & commitment for home improvements in Cheshire, North Wa

• 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 Ostle Homes Ltd Wigton · Main contractor

  Ostle Homes Ltd is a main contractor company based in Wigton, registered at Companies House in 2021.

• O Oswaldtwistle Glass Ltd Accrington · Glazing

  Oswaldtwistle Glass Ltd offers double glazing, specialist glazing services, and glass processing for domestic and commercial customers across the Nort

• O Oswestry Scaffolding Ltd Shropshire · Scaffolding

  Oswestry Scaffolding Ltd is a family-run business providing scaffolding services for over 25 years to domestic, commercial, industrial and public sect

• O OT Construction Potters Bar · Main contractor · 1-9 employees

  OT Construction offers a comprehensive range of building and design services for commercial, domestic, and interior projects. With a focus on reliabil

• O Otero Door Specialists Tonbridge · Windows & doors · 1-9 employees

  Trusted specialists in roller shutters, aluminium doors & door closers. Quality service & installation across Kent.

• O OTG Electrical Leamington Spa · Electrical

  OTG Electrical provides reliable electrical services in West Midlands and Warwickshire, offering lighting, safety reports, PAT testing, and more from

• O Other Building Completion and Finishing Ilford · Design & build

  Other Building Completion and Finishing offers engineering and construction services, specializing in building completion, finishing, and scientific r

• O Oti Design And Build Ltd Loughborough · Design & build · 1-9 employees

  OTI Design and Build is a dynamic building company with over 20 years of experience in domestic and commercial property development, offering a full r

• O Otisbum Ltd Sunderland · Main contractor

  Otisbum Engineering & Construction Company Ltd offers high-quality building, renovation, maintenance, and engineering solutions for residential, comme

• O OTL Staffing London · Concrete works

  OTL Staffing provides back of house staffing solutions for events and hospitality in London. Founded in 2021, they offer skilled professionals for ven

• O Otlantic Ltd Bournemouth · Painting & decorating · 1-9 employees

  Building Services Contractors supplying qualified, skilled workers to the construction and development industry across London and the South East.

• O Otley Roofing And Building Ltd Otley · Roofing · 1-9 employees

  A highly-regarded building and roofing company offering a variety of domestic and commercial roofing and building services throughout Otley and surrou

• O Otm Construction Ltd Bristol · Main contractor · 1-9 employees

  Experienced builders delivering safe, reliable and lasting results from your trusted partner in construction. OTM Construction offers a range of build

• O Otm UK Services Ltd London · Refurbishment · 1-9 employees

  OTM UK Services Limited offers reliable and professional cleaning solutions for homes and businesses across the UK. We focus on client safety, rigorou

• O Otpd Ltd Woodford Green · Plumbing

  24/7 Emergency plumbing and drainage services in Mayfair & Central London. Expert solutions for heating, boilers, and unblocking.

• O OTS Heating Services Durham · Heating & ventilation

  OTS Heating Services offers expert gas, heating, and plumbing services in Durham and the North East. We handle repairs, maintenance, and full installa

• O Otter Stop London · Fencing

  Otter Stop provides long-term otter fence solutions to protect fisheries and wildfowl lakes from otter predation. They offer tailored fencing and advi

• 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 Otterman Plumbing Ltd Cannock · Plumbing

  Otterman Plumbing Ltd is a plumbing service provider based in Cannock.

• 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 Our Best Builder Ltd Waltham Abbey · Main contractor

  Our Best Builder Ltd is a main contractor company based in Waltham Abbey, registered at Companies House in 2025.

• O Our Lady Of Grace Parish Buildings Preservation Trust Ltd London · Restoration & heritage

  Preserving exceptional heritage buildings and building vibrant community outreach programmes.

• O Our Mep Co. Ltd Fareham · M&E contracting

  Expert MEP design, installation & maintenance in Hampshire. Delivering quality, efficiency & energy-saving solutions for your building project. Get in

• O Our Rivers (Cumbria) Ltd Newport · Insulation

  Our Rivers (Cumbria) Ltd is a insulation company based in Newport, registered at Companies House in 2025.

• O OUR RIVERS (NORFOLK) LTD Newport · Drainage

  Our Rivers provides FREE Septic Tank Upgrades in Norfolk and Cumbria in association with trusted local experts to help restore local ecosystems and wa

• O Our Space Ltd Waterlooville · Main contractor · 1-9 employees

  Our Space Ltd is a trusted main contractor for construction, groundworks & landscaping for homeowners and the public sector across Hampshire.

• O Ourhouselondon Ltd Bromley · Refurbishment

  Our House London is a construction company in London, offering refurbishment, painting, carpentry, kitchen and bathroom fitting services with a focus

• O Ousegill Business Park Ltd York · Property developer

  OUSEGILL BUSINESS PARK LTD is a company registered in England. Further information is not available on the provided pages.

• O Out Build Group Ltd. Sidcup · Loft conversions · 1-9 employees

  Out Build Group specialises in helping homeowners in Kent, London and Essex transform their properties with loft conversions, extensions, and full hom

• O Out of the Valley Totnes · Design & build · 1-9 employees

  Leading the way in British made outdoor saunas, with the finest natural materials & heat technology. All handmade Out of the Valley, in Devon, England

• O OUTBOX STORAGE London · Security systems

  Outbox Underground Cycle Garage: the most secure domestic cycle storage on the market. Convenient, exclusive, secure, discreet.

• O OUTDOOR BUILDING SOLUTIONS LTD Redditch · Fencing

  Outdoor Building Solutions offers a nationwide garden building installation service for log cabins, sheds, pergolas, gazebos, and fencing. Trade and p

• O Outdoor Carpets Newton Abbot · Flooring

  Outdoor Carpets supply and fit synthetic sports surfaces, specialising in all-weather tennis courts and Multi-Use Games Areas (MUGAS) across the UK.