The National Retrofit Hub is calling for a stronger retrofit system

The UK retrofit sector is entering a period of significant opportunity. The Warm Homes Plan has set out major investment ambitions, while housing providers, councils and contractors are under increasing pressure to improve the performance of existing homes.

Funding is an essential part of making this happen, but a recent report from the National Retrofit Hub raises an important question: is the system surrounding retrofit ready to support delivery at the scale required?

Published in September 2026, A Vision for a Strong Retrofit System argues that successful retrofit will depend on more than individual funding programmes. It calls for long-term investment in skills, local delivery capacity, partnerships and better outcomes for residents.

At Target Green, this reflects an important reality of retrofit delivery. Funding may make a project possible, but it is the quality of the planning, design and coordination that helps turn investment into meaningful improvements.

The problem with short-term thinking

Retrofit programmes often operate around funding windows, eligibility requirements and fixed delivery deadlines.

These are necessary parts of publicly funded projects, but they can also create pressure. Housing providers may need to identify properties, commission surveys, appoint teams, develop designs and mobilise contractors within limited timescales.

When programmes are rushed, important decisions can be made before the building has been properly understood. Technical surveys may be incomplete, design details may remain unresolved and delivery teams can find themselves reacting to problems once work has started.

The National Retrofit Hub's report highlights how short funding cycles and fragmented programmes have made it difficult for organisations to invest in long-term capacity and retain skilled teams.

A more consistent approach would give housing providers and the wider supply chain greater confidence to plan ahead, develop skills and improve delivery between programmes.

Retrofit works best when the process is joined up

Successful retrofit involves more than selecting insulation, heating systems or renewable technologies.

It depends on an interconnected process involving assessment, design, coordination, procurement, installation, quality assurance and handover.

Each stage influences the next. Inaccurate survey information can lead to unsuitable specifications. Poorly resolved details can create installation difficulties. Weak coordination can result in clashes between insulation, ventilation, roof works, drainage and access arrangements.

These problems become more complex on occupied housing schemes, where resident safety, communication and disruption must also be considered.

One of the most effective ways to reduce these risks is to bring the relevant technical expertise into a project early, before the scope and programme become fixed.

What Newland Way tells us about coordination

At Newland Way in Monmouth, Target Green provided Retrofit Design and Coordination for a PAS 2035 Pathway C scheme across two occupied residential blocks containing 14 flats.

The works involved external wall insulation, roof improvements, cavity remediation, ventilation, solar PV and the replacement of existing elevated access walkways.

The replacement walkways were particularly important because they interacted with structural elements, insulation details, weather protection and the routes residents used to access their homes.

This was not a project where individual measures could be designed independently and simply handed over for installation. The different elements needed to work together, with sequencing and buildability considered alongside building performance.

It demonstrates why a stronger retrofit delivery system depends on collaboration between clients, designers, coordinators, contractors and specialist suppliers.

What a better retrofit system could look like

The National Retrofit Hub sets out seven foundations for a stronger system, including long-term direction, local flexibility, shared decision-making, whole-home approaches, meaningful outcomes, lasting capacity and quality assurance.

For housing providers, several practical principles stand out:

• Plan beyond individual funding windows. Build a longer-term picture of housing stock, investment priorities and technical requirements.

• Invest in better early-stage information. Accurate surveys, archetype mapping and appropriate investigations help reduce uncertainty.

• Bring teams together earlier. Designers, coordinators, contractors and resident liaison teams should understand the programme before works begin.

• Build quality checks into delivery. Survey reviews, technical design reviews, inspections and evidence requirements should be planned from the start.

• Measure meaningful outcomes. Energy ratings and installed measures matter, but so do comfort, resident experience, building condition and long-term performance.

These approaches help establish continuity between projects and reduce the need to solve the same problems repeatedly.

Success needs to mean more than the number of homes upgraded

As retrofit activity increases, it will be tempting to judge progress primarily by spending, installation numbers and completed properties.

Those measures are useful, but they do not provide a complete picture.

A project might achieve its installation targets while leaving unresolved issues with ventilation, moisture, resident comfort or long-term maintenance. Equally, a carefully designed programme might take more preparation but ultimately deliver better results and fewer problems after completion.

The industry needs to be able to demonstrate that public and private investment is improving homes in practice, not simply increasing the volume of construction activity.

That requires realistic programmes, competent teams, better evidence and a willingness to learn from completed projects.

How Target Green Can Help

Target Green works with housing providers, councils, landlords and contractors to provide design-led retrofit support from the earliest stages of a project.

Our services include retrofit assessments, PAS 2035 design and coordination, technical detailing, planning support, compliance advice and construction phase support.

If you are developing a retrofit programme, Target Green can help establish a more coordinated approach that considers technical performance, buildability, resident needs and long-term outcomes from the beginning.