A Retrofit Costs Comparison
Translating Expenditure to Value
We know that deep retrofit is a proven route to achieving net zero targets, tackling fuel poverty, and improving occupant health, but how much ill we need to spend on it – and what kind of retrofit can we afford? This research report, commissioned by the Passivhaus Trust and conducted by AtkinsRéalis, analyzes real-world social housing data to provide a transparent comparison of retrofit costs across different approaches to the challenge, including EnerPHit, Energiesprong, and AECB CarbonLite.
The study’s findings reveal that EnerPHit compares favorably to other intervention approaches, often sitting within the same cost-per-square-metre region, while providing a more robust framework for quality assurance. The report highlights how an EnerPHit-informed approach translates investment into measurable value by reliably closing the performance gap and future-proofing the UK’s building stock. As local authorities and housing providers face mounting pressures – from regulatory compliance to fuel poverty and climate targets – EnerPHit offers a clear path forward.



