Construction · Energy · Roofing · Fit-out
Everything your buildings need, from one trusted team.
Four divisions.
One team behind them.
Construction & CivilsBuild itUtilities, civil and structural engineering, site development and the project management that keeps everything on programme.Explore construction 
Renewable EnergyPower itCommercial solar PV, battery storage and EV charging that cut carbon and energy bills, with full decarbonisation planning.Explore energy 
Roofing & CladdingProtect itRe-cladding, felt and liquid systems, safe asbestos removal and planned maintenance that keeps the envelope watertight.Explore roofing 
Visit site ↗Fit-Out & JoineryFit it outCorporate re-imaging, bespoke joinery and interiors for national brands, the craft business trading since 1986 and part of Cornerstone Group since 2025.Enter Cornerstone Fitout 
One group.
Every building need.
Most projects mean stitching together a dozen contractors. We think that's backwards.
Cornerstone brings construction, civil engineering, renewable energy, roofing and fit-out into a single business. You deal with one team, one point of accountability and one relationship, not a scramble of trades who've never worked together.
One accountable partner
Design, groundworks, build, roof, fit-out and power under one contract. Nobody to hand the blame to.
The whole life of the building
From the first survey to planned maintenance years after handover.
Lancashire based, working UK wide
From a listed barn in the Ribble Valley to a national solar and roofing programme.
Proof, not promises.
Live hospitalConstruction · HealthcareGreater Lancashire Hospital Theatre ExpansionA new operating theatre, air-handling unit and backup generator, built around a live, operational hospital.View case study 
750 kWEnergy · IndustrialFDC solar PV schemeA rooftop solar installation for transport operator FDC Holdings, cutting energy costs and carbon across their central distribution hub.View case study 
£24m resortFit-out · LeisureThe Woodland SpaBespoke joinery and the full interior fit out for a £24 million luxury spa transformation at Crow Wood, Burnley.View case study 
Fire safetyFit-out · Sports and hospitalityPreston Grasshoppers Fire Safety UpgradeNew fire doors, compartmentation repairs and a full new fire alarm, closing out the club's fire risk assessment.View case study 
114 kWEnergy · RetailBooker Newton Abbott 114 kW SolarA 114 kW rooftop solar system in Devon with a combined 20-year roof-and-solar warranty and a 3.4-year payback.View case study 
HeritageRestoration · Grade II listedYe Horns InnSympathetic restoration and extension of a Grade II listed country pub, reviving a much-loved community landmark.View case study 
Brand standardFit-out · Fast serveFast serve restaurant fit-outsOur fit-out and joinery work for fast serve restaurants.View case study 
Live operationConstruction · IndustrialWatson's Business Premises ExpansionA building extension to house new machinery and support a growing operation.View case study 
334 kWpEnergy · RoofingBooker Watford Roof & SolarA new roof and a 334 kWp solar PV system delivered together for Booker’s Watford cash-and-carry.View case study 
17th centuryRestoration · Heritage17th-Century Barn Restoration, Fober FarmA heritage restoration of a 17th-century barn in the Forest of Bowland.View case study 
133 bedroomsFit-out · HospitalityHotel Football, ManchesterA full interior fit-out of a landmark hospitality venue overlooking Old Trafford.View case study 75 kWEnergy · AgricultureBilsborrow Hall Farm 75 kW SolarA 75 kW rooftop and ground-mounted solar system for a family dairy farm.View case study 
50 kWEnergy · RoofingLovania NurseriesA 50 kW solar array made possible only by re-roofing a fragile packing-house roof.View case study 
No strip-offRoofing · RefurbishmentLiquid Roof OverlayRefurbishing a tired, leaking office roof with a cold-applied liquid system and new rooflights.View case study Built for
your industry.
Retail and wholesale
Roll-outs, re-imaging and rooftop solar for stores and wholesale.
View sector
Offices and mixed use
Commercial space fitted out and future-proofed.
View sector
Hospitals and clinics
Theatres, wards and plant, built around live operations.
View sectorHotels, spas and venues
Hotels, spas, pubs and venues that guests remember.
View sector
Factories and warehouses
Warehouses, factories and the roofs and power they need.
View sector
Schools and colleges
Safe, efficient learning spaces delivered around term time.
View sector
Building better
shouldn't cost the earth.
It's why our energy division exists. We design out waste, source responsibly and help clients decarbonise the buildings they already own, without compromising quality or programme.
Commercial solar in action.
A closer look at our renewable energy projects, from survey to switch-on.
What our clients say.
In their own words, from hospitals, hotels and spas, charities, schools, restaurant operators and heritage funders we work with.
There is a guarantee when dealing with Cornerstone: quality, professionalism and outstanding craftsmanship every time. I have never had an issue with any item on any project. The guys go above and beyond to understand your business needs and are happy to help in any way during a project to get the job over the line.
Spencer BurgeCrow Wood Hotel & Spa, Burnley
John is and has always been really easy to work with. He understands the sensitivities of our Houses and he and the team are always willing to work with our needs in their minds. We hope to keep this relationship for many years to come.
Michael DoyleRonald McDonald House Manchester
Amazing delivery of the project. Staff on site were very informative, helpful and amazing problem solvers when an issue arose. Project was completed on time and within budget.
Lukman VikaPreston Muslim Girls School
Professional team, desire to maintain high standards at all times. Work collectively and alongside client throughout to deliver the wants and needs of the design. Trusted team with high expectations.
FranchiseeFast serve restaurant group
Been a pleasure to work with Lee, Cornerstone. Professional, high quality traditional barn restoration. Continuous communication with the client and the Forest of Bowland NL as the funding body (Defra funded). Would definitely recommend.
Tarja WilsonFiPL Lead Officer, Forest of Bowland National Landscape
We’ve worked with Cornerstone on two major healthcare projects. Their understanding of infection control and working in live clinical environments sets them apart from any contractor we’ve used.
Dan SawyerDirector of Engineering, Greater Lancashire Hospitals
Cornerstone delivered an excellent service throughout our solar installations at Booker, demonstrating professionalism, strong communication and a real commitment to quality. The work was completed efficiently and to a high standard, and I would have no hesitation in recommending them.
Gary CooperHead of Construction, Booker
Guides and project stories.
Renewable EnergyOne roof, one array, one 30-year warrantyHave Cornerstone fit your new roof and install your solar, and both are covered by a single combined 30-year warranty.Read the article GuidesCommercial solar payback explained: what affects it and how long it takesHow commercial solar payback works, what drives it, from daytime demand to roof condition, and how we model yours before you commit.Read the article Project spotlightProject spotlight: Booker Watford roof and solarHow a roof that was due for replacement became the platform for a 334 kWp solar array at Booker Watford, with a 3.1-year payback.Read the article Power your business with solar.
Our renewables team designs, installs and maintains commercial solar, storage and EV charging across the North West and the UK.
Good questions, straight answers.
Can't see your question here? Our team is happy to talk it through.
What does Cornerstone Group do?
We bring construction and civils, renewable energy, roofing and cladding, and fit-out and joinery into one group. That makes us a single partner that can design, build, power and protect the spaces you run.
Can one company really handle my whole project?
Yes. Because every discipline sits within one group, you deal with one team, one point of accountability and one relationship, which means tighter coordination, fewer gaps in scope and a clearer programme.
Do I have to use all four of your services?
Not at all. Each division is a specialist in its own right, so you can pick the one you need today or let us handle the lot.
Do you work on single sites or national roll-outs?
Both. Our fit-out business has been delivering for national brands since 1986, and as a group we work as a partner who understands your whole estate, whether that is one unit or a national roll-out.
How do I start a project with you?
Call us on 0800 011 9758 or send us a few details through our contact form. One call reaches the whole group, and we will bring the right teams together for your project.
Tell us about
your project
One site or a whole estate, one call reaches the whole group. We'll bring the right teams together and reply within one working day.
What happens next
- Tell us what you needA few lines on the site, the scope and your timescale.
- We bring the right teams togetherConstruction, energy, roofing or fit-out, whichever the job calls for.
- One proposal, one programmeA single point of contact from survey to handover.
