Cornerstone has been working with private homeowners for more than a decade to install energy efficiency and facade measures in their properties, enabling them to improve their thermal efficiency, improve their appearance and reduce their energy bills. We consider each and every individual homeowner as an important and valued customer, working with them to identify a solution to their energy efficiency needs that meets their specification and budget.

We always seek to raise awareness of any central or local government funding streams available to our private sector customers to enable them to minimise their investment wherever possible.


Measures installed in over 7,500 private tenure properties


In addition to servicing enquiries from individual homeowners, Cornerstone has significant experience of working with local authorities to deliver third party funded energy efficiency schemes within the private sector, including across Norfolk, Cambridgeshire, Suffolk and Cheshire in recent years.

Our expert bid team is also able to provide advice and support in compiling funding applications, having co-authored bids that secured £30m in third party funding since 2012. We understand the target driven nature of these schemes and have an excellent record of working with our local authority partners to maximise uptake and support full and accurate progress reporting.

Cornerstone is also adept at self-generating area-based energy efficiency schemes within private housing, targeting specific property types and demographics with attractive funding offers. We have completed schemes of up to 500 properties through this route to date. In addition, we always seek to work with our social housing clients to ensure private homeowners in the vicinity of our works benefit from the economies of scale our social retrofit schemes generate.




“The end to end experience with Cornerstone was first class. They have excellent technical knowledge and designed a system that perfectly meets our needs. The installation process was quick and clean and we were kept informed every step of the way. More than a year into operation and the system has reduced our heating costs by around 35%, with Cornerstone continuing to provide support throughout. I would thoroughly recommend Cornerstone.”

Kim Hazell, Director, Chichester Close Saltdean RTM Company Ltd, Sussex

“Before the new boiler was installed, my contribution to the heating bills was very high. The new system has meant heating my home is much more affordable, plus the air quality is much better now that the old oil boiler has been removed. Very happy!"

Mr D, Home Owner, Sussex

“Not only does my house look brilliant but I am so much warmer and my fuel bills have plummeted. Cornerstone were a very friendly company who were a pleasure to have around and we are really grateful for what they did on the estate."

Jill Sharp, Chairperson of Paston Residents Association, Peterborough

"In September 2016 your company installed outside wall insulation. I am amazed at the money we are saving on heating – no more wearing coats and sitting covered with a duvet. We would like to say a big thank you for your excellent product."

Mrs B, Home Owner, Wimblington, Cambridgeshire

"I’ve called all the residents you’ve completed installs on at Centre Drive. The feedback has been fantastic! Polite, courteous, beyond the call of duty, tidy, professional, amazing communication, extremely neat, hardworking - these are some of the responses I’ve had. Great praise for all your project / team managers too."

Kayleigh Maguire, Energy Efficiency and Sustainability Officer, East Cambridgeshire District Council

"I would just like to say how pleased we are with the work from start to finish, everyone has been very friendly and helpful – thank you."

Mrs A, Home Owner, Carlton Colville, Lowestoft

01379 853 613
Registered Office: Cornerstone (East Anglia) Limited, Unit 2-4, Fuller Road, Harleston, Norfolk, IP20 9EA.
Registered No.05117129. Registered in England and Wales.