Outcomes Over Outputs: Retrofit Redefined
30th June 2025
Retrofitting homes isn’t about tech or tick boxes — but about delivering outcomes that actually matter.
In this episode, Andy Sutton, Co-Founder and Chief Innovation Officer at Sero, lays down a bold challenge: define the outcome you want, measure it at the end — and keep it simple. From health to heat, retrofit must be judged by what it delivers for real people, not what it looks like on paper.
Key takeaways:
Retrofit must start with outcomes: health, affordability, comfort, and carbon reduction.
Define success in plain terms — CO₂ levels, temperature, running costs — and measure it post-works.
Separate the technical from the tactical — residents need clarity, not complexity.
Poor ventilation and overheating are often missed, yet critical to health.
Place-based, phased retrofit and early engagement build trust and uptake.
Retrofit is a health intervention — physical and mental. Think safe, secure, joyful homes.
Quality assurance can’t be a tick-box — it must prove the home performs.
Andy’s ‘magic wand’ idea: include minimum warmth in rent to align incentives and protect health.
Referenced resources:
Building Regs Part F (Ventilation): https://www.gov.uk/government/publications/ventilation-approved-document-f
Join the movement to retrofit for outcomes — not just output.
