Tune in to Passivhaus retrofit

Passivhaus retrofit is coming to prime time, featuring in a forthcoming Channel 4 programme with Guy Martin - House Without Bills. The programme will shine a spotlight on what high-quality home retrofit can look like in practice, helping to create warmer, healthier homes with much lower energy demand. Watch Guy Martin’s 'House Without Bills' on Channel 4 on Monday 9 February 2026 at 9pm!

Guy Martin House without Bills. Image credit Channel 4

From cold to comfort: Why Passivhaus retrofit matters

Across the UK’s older housing stock, improving existing homes is one of the most important opportunities we have to increase comfort, reduce energy demand, and cut carbon emissions.

However, retrofitting existing buildings is complex: every home is different, and high-quality outcomes depend on careful planning, appropriate sequencing of measures, and a clear understanding of performance targets.

Passivhaus principles can be applied to retrofit through EnerPHit, an approach developed specifically for upgrading existing buildings. Whether a project is undertaken all at once or delivered in carefully planned stages over time, Passivhaus retrofit provides a robust framework for achieving high levels of performance, while helping to avoid common pitfalls.

Supporting better retrofit in practice: what's next?

In the weeks surrounding the broadcast, the Passivhaus Trust will be sharing a range of resources and opportunities to help homeowners and professionals take their next steps. This will include practical guidance, real project examples, and upcoming events designed to support informed, high-quality retrofit.

For homeowners

Retrofit shouldn't feel overwhelming. With Passivhaus, owners benefit from expert support, whole-house planning, and trusted evidence from real projects that have delivered these outcomes in practice. If you're curious about retrofit, we offer:

Retrofit case studies showing what’s possible in real UK homes
A lunch & learn webinar series offering an opportunity to gain insights from experts who have delivered Passivhaus retrofits.
Guidance on how to find experienced support through the Passivhaus member network

For members and industry professionals

Our members will play a key role in supporting the growing public interest in high-quality retrofit. The Trust’s 2026 retrofit programme includes:

Passivhaus Retrofit Masterclasses for building professionals
A growing library of retrofit guidance and examples
Member-led case study webinars (February to April 2026), sharing practical retrofit insights across a range of housing types

We’ll be sharing further details shortly on how members can get involved, including opportunities to present completed projects and help showcase best practice.

Tune in to the programme and help spread accurate awareness of high-quality retrofit.