UKREiiF 2026 from a decarbonisation expert’s perspective

Decarbonisation and viability: The tension no one has resolved

The decarbonisation requirements facing new residential development are significant and tightening. Future Homes Standard, embodied carbon targets, and net zero-ready design are not aspirational additions to a scheme; they are increasingly baseline expectations from planning authorities, funders, and institutional purchasers.

The problem is that they add cost. In a market where development viability is already under pressure from land values, infrastructure obligations, affordable housing requirements, and financing costs, the additional burden of meeting higher environmental standards is not always absorbable. Schemes that stack up on paper without those costs often do not stack up with them.

That tension is not new. But it is more acute than it has been, and the honest version of the housing delivery conversation at UKREiiF has to address it directly rather than treating decarbonisation as a separate workstream that sits alongside viability rather than inside it.

What the programme is asking

Reading through the UKREiiF sessions on housing and development, the following questions are being asked this year:

• Who actually delivers the 1.5 million homes the government is targeting, and to what standard?
• What does a viable net-zero-ready scheme look like at current interest rates and land values?
• What role can modern methods of construction realistically play in reducing both carbon and cost?

These are the right questions and are also the ones that practitioners closest to delivery tend to have more nuanced views on than the policy conversation usually reflects. The sessions worth attending are those where housebuilders, development finance providers, and local authority leaders are being direct about where the numbers do and do not work.

Retrofit alongside new build

The decarbonisation challenge in housing goes further than what gets built new, with the existing stock also contributing to the scale of the problem. Retrofit of residential buildings means improving fabric performance, replacing gas heating, and upgrading ventilation, which is technically understood but financially and logistically complex at scale.

The UKREiiF programme addresses retrofit across multiple sessions, and what I will be listening for is whether the conversations have moved on from the familiar barriers to anything more useful.

Funding mechanisms, delivery models, tenant engagement, the role of housing associations and local authorities as large-scale retrofit commissioners are the areas where genuine progress would be meaningful.

The gap between ambition and delivery

In my experience, the schemes that successfully navigate the decarbonisation and viability tension share recognisable characteristics. Examples include when:

• The environmental requirements are understood and costed from day one, not retrofitted into the appraisal once planning is in sight.
• The development team has a clear view of what the end user or purchaser actually values and what they will pay for.
• The relationship with the local authority includes a genuine conversation about what is deliverable rather than what is aspirational.

That is not a formula. It is a set of judgments that experienced practitioners make under real financial pressure. UKREiiF is useful because it puts many of those practitioners in the same room. Whether the formal programme captures their thinking or whether the most useful conversations happen elsewhere is always the question.

Arrange a meeting with me at UKREiiF

If you are attending UKREiiF and want to discuss decarbonisation, development viability, or how these questions affect a specific project you are working on, I would be happy to connect in Leeds.

Either contact me directly at [email protected] for a private meeting, or email [email protected] to register your interest in our fringe event and discuss your challenges while enjoying some free food and drinks.