Energy construction companies

4513 UK companies working in the energy sector.

• O OMES INSTALLATIONS Whitstable · Electrical

  OMES Installations Ltd is a reliable local electrician in Whitstable, offering expert electrical services to homes and businesses. Contact today.

• O OMKA Energy London · Solar PV

  OMKA Energy specialises in renewable energy projects, particularly solar energy systems. With over 10 years of experience, they offer turnkey project

• O Omni3 Limited Horsham · Solar PV

  MCS certified solar PV and battery storage installation in West Sussex & the South East. NICEIC approved, ECA member. EV charging, electrical and secu

• O OmniOrigin Monmouth · Solar PV

  OmniOrigin provides solar, battery storage, and smart energy planning for homes and businesses. Get clear advice and tailored solutions.

• 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 One Way Group Ltd Stoke On Trent · Electrical

  One Way Group: National electrical contractors. Electrical design, installation, and maintenance for industrial facilities.

• O ONE31 ENERGY LTD London · Solar PV

  ONE31 ENERGY LTD is a renewable energy company focused on reducing costs, cutting carbon, and building a sustainable future through innovative energy

• O ONSHORE TECHNICAL LTD London · Utilities

  Onshore Technical: Experts in gas sector recruitment, temp-to-perm contracts, design consultation, and project management.

• O ONTIME ECO ENERGY SOLUTIONS LTD Manchester · Heating & ventilation

  Ontime energy solutions is a reputable engineering company providing comprehensive services to residential clients. With expertise in heating, cooling

• O Ontop Electrical Ltd Nottingham · Electrical

  Ontop Electrical provides high-end bespoke electrical solutions for private, commercial and industrial clients across Nottinghamshire, Derbyshire and

• O Opal Access Group Newcastle Upon Tyne · Rail infrastructure · 1-9 employees

  Opal Access Limited delivers facilities management, maintenance, rope access, commercial cleaning, security, workwear, rail and renewables services ac

• O Opal Energy Ltd Oldham · Insulation

  Opal Energy provides government-funded energy-efficient home improvements, making homes warmer and greener. Specialising in insulation and heating con

• O Open Ecx Ltd Manchester · Insulation

  Automate invoicing, ordering and statement reconciliation with 100% accuracy. An accredited Peppol Access Point connecting 17,000+ trading parties.

• O Openview Security Solutions Ltd Essex · Electrical · 250+ employees

  Preqin is a leading provider of data, insights, and analytics for the alternative assets industry, empowering professionals to make informed investmen

• O Operation Green Westcliff-On-Sea · Solar PV

  Solar, EV & battery installers in Southend, Essex, Cambridge & beyond. Affordable, trusted and ready to help.

• O OPTAMA LTD Glasgow · Solar PV · 10-49 employees

  Optama Renewables is a leading renewable energy company in Scotland, specialising in sustainable heating and energy solutions like solar PV, heat pump

• O Optility Ltd Cradley Heath · Utilities · 10-49 employees

  Optility Limited delivers comprehensive infrastructure solutions across the UK, specializing in civil engineering, multi-utility projects, and telecom

• O Optimal Energy Solutions Ltd Grays · Solar PV

  Optimal Energy Solutions specialises in designing and installing solar PV systems, solar battery storage, air source heat pumps, and EV charging solut

• O OPTIMAL RENEWABLES LIMITED Stirling · Heating & ventilation

  Expert heat pump installers in Central Scotland, specialising in air source and ground source heat pumps for homes and businesses. MCS-certified profe

• O Optimum Electrics Ltd Peterborough · Electrical

  Optimum Electrics is a leading UK solar and electrical company based in Peterborough, providing hassle-free solar and electrical services for commerci

• O Options Energy Services Ltd Harlow · Civil engineering · 10-49 employees

  Options Energy Services is an independent civil engineering contractor delivering utility infrastructure, energy, telecoms and traffic management serv

• O Optisol Services Ltd Cheshire · Solar PV · 10-49 employees

  Optisol Services is a leading UK solar farm cleaning company, delivering professional solar panel cleaning services for commercial solar farms across

• O Optivolt Solutions Ltd London · Electrical

  Optivolt Solutions Limited provides specialist training in AI, digital skills, automation, IoT, and smart technologies, alongside electrical NVQ compe

• O Opus Power Ltd Shrewsbury · Electrical

  Opus Power Ltd specialises in electrical contracting, with over 30 years of experience in overhead line (OHL) work and power distribution across the U

• O Opus Utility Solutions Warrington · Utilities · 10-49 employees

  Opus Utility Solutions is a Tier 1 SME delivering civil & electrical engineering solutions in the utilities sector, supporting DNOs and IDNOs around t

• 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 Orbis EV Stafford · EV charging

  Orbis EV specialises in the installation and support of electric vehicle charging points, offering advice for domestic and commercial clients. They ar

• O ORBITAL ELECTRICAL SOLUTIONS LIMITED Rye · Electrical

  Orbital Electrical Solutions Domestic and Commercial Electricians have an enviable reputation for the quality of our work, attention to details and co

• O Orchard Vale Renewables Ltd Stoke-Sub-Hamdon · Solar PV

  Somerset based renewable energy specialists providing solar PV, battery storage, and EV charging solutions for domestic and commercial customers.

• O Ordtek Ltd Norfolk · Civil engineering

  Ordtek specializes in UXO risk assessment, clearance support & geoscience services worldwide, trusted by infrastructure, energy & construction project

• O Ore Valley Heating Ltd Lochgelly · Heating & ventilation

  Ore Valley Housing Association (OVHA) provides affordable housing and community support in Fife. They also operate subsidiaries for mid-market rent, c

• O Orio Electrical Services Ltd Shoreham-By-Sea · Electrical

  Orio Electrical Services are experts in electrical installation for homes and businesses across the South East. Services include solar PV, EV charging

• O Orkney.com Isle Of Orkney · Carpentry & joinery · 10-49 employees

  Orkney.com is the official tourism and lifestyle website for Orkney, offering information on things to do, places to stay, and how to get there. It al

• O Orton & Wenlock Ltd Colchester · Solar PV

  Orton & Wenlock design & install solar systems for homes and businesses across Essex & Suffolk, focused on savings and long-term performance.

• O Ortus Energy Ltd London · Solar PV

  End to end Renewable Energy suppliers and funding solutions for commercial and industrial businesses with a proven track record.

• O OSADARE LIMITED Bristol · Civil engineering · 1-9 employees

  Expert project bidding, skilled staff placement, and professional development opportunities across offshore, nuclear, aerospace, and industrial mega p

• 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 Osmose Hudderfield · Utilities

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

• 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 Outersight (UK) Ltd Plymouth · Security systems

  Specialist remote CCTV, wildlife observation and research, and harsh environment CCTV solutions. Bringing the outside in with innovative technical sol

• O OUTWEST CIVIL ENGINEERING Birmingham · Civil engineering

  OUTWEST Construction are a Civil Engineering contractor specialising in groundworks, roads and drainage, demolition, from the West Midlands, serving h

• O Ovenden Allworks Ltd Canterbury · Civil engineering

  Ovenden Allworks is a family-owned construction company based in Kent, specialising in civil engineering, groundworks, earthmoving, and surfacing. Wit

• O Over to Solar Woking · Solar PV

  Over to Solar is your local, trusted solar panel installer in Surrey. We provide bespoke, reliable solar systems for homes and businesses, offering co

• O Ovi Construction Ltd Romford · Civil engineering · 1-9 employees

  OVI Construction Company Limited is a Nigerian-based multidisciplinary construction and engineering company delivering end-to-end infrastructure solut

• O Ovic Ltd Skipton · Marine & water engineering

  Ovic Limited are water engineering specialists based in Skipton, North Yorkshire, offering services in asset surveys, systems analysis, and hydraulic

• O Owen & Palmer Ltd Bangor · Electrical

  Leading industrial electrical contractor servicing North & Mid Wales, managing installations, construction and facilities for complete solutions and a

• O Owen Construction Consultancy Ltd Orpington · Main contractor

  Construction Health & Safety Consultants offering services in London, Kent & Essex. Experienced consultants ensure safe and compliant projects.

• O Owen Electrical Solutions Ltd Southampton · Electrical

  Highly skilled electricians providing Domestic, Commercial, Industrial, and Renewable electrical services. We are MCS registered and offer bespoke bat

• O Owv Developments Ltd Camberley · Extensions

  NHBC registered building and development company in Camberley, Surrey, serving London and Home Counties. Specialising in extensions, new builds, renov

• O Oxford Installations Ltd Bicester · Electrical

  Oxford Installations provides electrical, solar PV, battery storage, EV charging and air conditioning installations across Oxfordshire. Get a free quo