Energy construction companies

4493 UK companies working in the energy sector.

• N Nuthatch Construction Ltd Nantwich · Design & build

  Nuthatch Construction offers design, fabrication, construction & refurbishment of steel-framed Industrial and Commercial buildings.

• N Nutherm Renewables Newry · Heating & ventilation · 1-9 employees

  Nutherm Renewables Ltd specialises in the supply and installation of domestic and commercial renewable heating solutions, including air source heat pu

• N Nuttall Energy Liverpool · Electrical

  Nuttall Energy offers electrical, solar panel, and EV charger solutions in the North West. NICEIC-accredited, they focus on quality, sustainability, a

• N Nuvia Ltd Warrington · Main contractor · 250+ employees

  NUVIA, part of VINCI Group, delivers innovative EPC, engineering, products and services for nuclear, defense, healthcare and industrial facilities wor

• N NuviMedia LTD Fleet · Solar PV · 1-9 employees

  NuVi Media LTD provides high quality, cost effective and safe commercial Unmanned Aerial Vehicle or Drone solutions for industrial asset monitoring, i

• N Nuvolt Ltd Cardiff · Solar PV · 10-49 employees

  Nuvolt designs, funds, builds and operates integrated energy systems, solar, battery, EV and grid, under one accountable partner.

• N NVM Group Wembley · Civil engineering

  NVM Group is a UK-based energy and infrastructure contractor delivering civil engineering and utility services across projects nationwide. Specialisin

• N Nwecs Ltd Liverpool · M&E contracting · 1-9 employees

  Independent inspection and surveillance services specializing in NDT, mechanical/welding QA QC, and remote inspection across the UK. Your Quality Cont

• N Nyxion Ltd London · Electrical · 1-9 employees

  Electrical and smart-home contractor for architects. RIBA-aware, M&E coordinated, NICEIC, KNX and Rako certified. London and across the UK.

• O O & K Property Works Ltd London · Design & build · 1-9 employees

  London design & build specialists since 2007. Extensions, lofts, renovations, new builds, plus MCS-certified heat pumps and solar PV. Fixed quotes.

• O O J Neil Contracting Ltd Bury St Edmunds · Utilities · 10-49 employees

  Suffolk-based agricultural and biomass company providing sustainable and cost-effective solutions for the renewable energy, utility, and equestrian se

• O O.J.M Insulations Ltd Essex · Insulation · 1-9 employees

  OJM Insulations is a leading independent insulation contractor established in 2001, offering a wide range of services including thermal insulation, tr

• O O'Hagan Crane Hire Magherafelt, · Crane hire · 1-9 employees

  O'Hagan Crane Hire is a family-run business offering crane hire, wind turbine support, haulage, and contract lifts across Ireland and the UK. Establis

• O O'Keeffe Building Services Ltd Nottingham · Main contractor · 10-49 employees

  O'Keeffe Building Services offers luxury new builds, extensions, renovations, and commercial building services, alongside solar installation solutions

• O Oak Tree Energy Bridgend · Solar PV · 10-49 employees

  Oak Tree Energy is a not-for-profit organisation focused on improving home energy performance. They offer surveys and help secure funding for solar pa

• O Oakes Energy Houghton Le Spring · Heating & ventilation · 10-49 employees

  Oakes Energy Services provides HVAC, renewable technology, and electrical solutions for commercial customers, helping businesses decarbonise and reduc

• O Oakpark Energy Ltd Buckingham · Solar PV

  Oakpark Energy provides expert renewable energy solutions for homes and businesses, including solar panels, battery storage and EV charging.

• O Oakray Renewables Enfield · Solar PV

  Oakray Renewables offer comprehensive renewable solar energy solutions for residential and commercial properties. Explore our services to embrace a gr

• O Oakwood Collective Stowmarket · Main contractor · 1-9 employees

  Oakwood Collective are Suffolk principle contractors delivering bespoke house extensions, renovations, new builds, kitchens, bathrooms & commercial bu

• O Oakwood Energy Group Winsford · Solar PV · 1-9 employees

  Oakwood Energy Group are nationwide leaders in commercial & domestic electrical installations and energy management, specialising in solar PV and batt

• O Obnisha Ltd Liverpool · Marine & water engineering

  OBNISHA Limited is a specialist marine consultancy, marine warranty surveying, and maritime asset management company.

• O Ocean Solar Salisbury · Plumbing · 1-9 employees

  Ocean Solar provides renewable heating and plumbing solutions for domestic and commercial clients, including housing developers and contractors across

• O Ocean Technical Safety Services Ltd Falmouth · Steel fabrication

  Ocean Technical Safety Services delivers professional workplace safety training, compliance, and inspection solutions to keep your workforce protected

• O Oceanic Flooring Ltd Aberdeen · Flooring · 1-9 employees

  Oceanic Flooring Ltd are specialist commercial, industrial and marine flooring installers in Aberdeen. Tailored solutions, BOSIET-certified, and free

• O Ockelton Electrical Contractors Ltd Beverley · Electrical · 1-9 employees

  Ockelton Electrical are local electricians in Hull & East Yorkshire. Specialising in domestic, commercial and renewable energy solutions like Solar Pa

• O Oct Construction Ltd Warrington · Demolition · 1-9 employees

  Expert groundworks and civil engineering solutions across the North West and beyond. With a commitment to safety, efficiency, and quality.

• O Octopus Group London · Property developer

  Octopus Group is an entrepreneurial business investing in people, ideas, and industries that aim to change the world, focusing on financial services,

• O Oeg Training Ltd Great Yarmouth · Painting & decorating · 1-9 employees

  OEG Training Centre supports the wind energy sector with accredited training in realistic environments, building practical, career-ready skills for pr

• O OFF GRID DEVELOPMENTS LTD Hastings · Solar PV

  Expert construction, renewable energy services and drone surveys in East Sussex. Building sustainable solutions for a greener future.

• O Off Grid Heating Ltd Monmouth · Heating & ventilation · 1-9 employees

  OFTEC approved installers of air source, ground source, water source and other off-grid heating solutions in Monmouthshire, Wales, Herefordshire, Glou

• O OFF-GRID NORTH WEST LTD Preston · Solar PV · 1-9 employees

  Off-Grid North West: MCS certified specialists in solar panel and EV charger installation in Lancashire. Go green with renewable energy solutions.

• O Offshore Solutions Group London · Civil engineering · 1-9 employees

  Offshore Solutions Group develops critical wet storage infrastructure (FLOW-Parks™) for the UK's floating offshore wind ambitions, optimising logistic

• O Ogo Electrical Ltd East Cowes · Electrical

  OGO Electrical Ltd provides Victron Energy installations, marine electrical systems and off-grid power solutions across the South Coast.

• O OIC Valve Covers Eynsham · Insulation · 1-9 employees

  OIC Valve Covers are specialists in manufacturing bespoke thermal covers for valves & pipes, saving companies money, & protection from heat.

• O Oil Tank Change Newmarket · Utilities · 1-9 employees

  Need an oil tank? Our certified experts provide fast, safe, and affordable oil tank replacement services. Get your free quote today!

• O Oiltec Fordingbridge · Heating & ventilation · 1-9 employees

  Independent service engineers specialising in oil boiler servicing, repairs, and installations. Also cover Aga Cooker and Rayburn service, repair, bre

• O OJF Electrical Chelmsford · Electrical · 1-9 employees

  Award-winning Solar PV and EV charger installations in Chelmsford, Essex, delivering trusted electrical solutions for homes and businesses.

• O Old Park Engineering Services Ltd West Midlands · Design & build

  Old Park Engineering Services Ltd specialise in the design, installation, maintenance and refurbishment of L.P.G. bulk storage and distribution equipm

• O Olympian Fire Cheadle · Fire protection

  Olympian Fire: Fire Alarm, Life Safety & Security Systems Design, Installation & Maintenance. Established 1991, UK leading independent life safety sys

• O Omega Electrical Contractors (Crt) Ltd Evesham · Electrical · 1-9 employees

  Leading electrical contractor in the Midlands, offering outstanding service at competitive prices. Certified technicians for residential and commercia

• O Omenatic Ltd Caterham · Scaffolding · 1-9 employees

  Specialist rope access company providing safe, efficient access to difficult locations where conventional methods are impractical. Serving constructio

• O OMES INSTALLATIONS Whitstable · Electrical · 1-9 employees

  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 · 1-9 employees

  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 · 1-9 employees

  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 · 10-49 employees

  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 Stockport · Heating & ventilation · 1-9 employees

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