The background
It was clear these homes would benefit from both insulation and ventilation to reduce their carbon emissions and improve thermal comfort.
We take a fabric first approach to retrofit where possible, meaning we look to insulate and ventilate first and install renewables second or where we cannot achieve an EPC C or above with fabric improvements alone.
The homes were also eligible for renewable measures such as Solar PV and domestic heating improvements of Air Source Heat Pumps for an energy efficient home. Work was completed between April 2024 to March 2025.
We engage continuously with residents via online surveys, face-to-face discussions, and dedicated feedback events to ensure their satisfaction with the quality and progress of works.
Loft insulation
41 complete
Ventilation
98 complete
Air Source Heat Pump
98 complete
Solar panels
98 complete
Cavity wall insulation
476 complete
The result
All properties reached an EPC of at least C after the work. One property was even taken from a D to a mid-band A.
See below for examples of installation costs, and subsequent savings for the resident.
Case studies
Northbourne, Surrey
Brett and Sian moved into the estate 30 years ago and had been relying on storage heaters to warm their home.
They had an Air Source Heat Pump installed as well as door undercuts, new extractor fans in the kitchen and bathroom, loft insulation and solar panels.
We love our new Air Source Heat Pump. The electricians and management team were all hard working and approachable, and it was worth working with Southern Housing and putting up with a few days work in our home as the results for us have been so positive.
David also lives on the estate and had his storage heaters replaced with an Air Source Heat Pump. He also had extractor fans, door undercuts, heating controls, loft insulation and vents, and solar panels installed. He was guided to access the Smart Export Scheme - allowing residents to sell excess electricity generated back to the grid.
I used to put £20 every two weeks on electric now I only use £10. It means I've been able to increase my savings and I'm using the money to take my son on holiday for his 18th birthday.
Mr and Mrs Peach said the benefits of energy-saving measures in their home had been hugely beneficial. They had an Air Source Heat Pump installed as well as solar panels, loft insulation and vents and new fans for the bathroom and kitchen.
Our home is now much warmer and retains its heat for longer. Our bills have reduced, and we now have constant warmth and a good ambient temperature.