Niche to Mainstream: Can low-carbon housing scale up?

The UK housing sector has become comfortable talking about sustainability in the past decade. Terms such as Net Zero, embodied carbon, and biodiversity net gain have evolved from esoteric topics to more mainstream, particularly as UK Building Regulations push housebuilders to higher levels of sustainability.

But do the Regulations go far enough? Some developers, architects and investors, feel that ‘sustainability’ alone is no longer sufficient. Can housebuilding be greener – and can the industry deliver zero-bill homes or regenerative residential architecture at scale?

At UKREiiF 2026, conversations around the built environment increasingly focused on this topic, examining how the industry can go beyond reducing environmental harm and create homes, communities and developments that actively improve environmental and social outcomes.

Some businesses are already part of that change, reshaping how projects are designed, funded and delivered. But can the mainstream housebuilders get on board?

From sustainability to regeneration

For Jerry Tate, founder of regenerative architecture practice Tate + Co, the distinction between sustainability and regeneration is fundamental. He likes to keep definitions straightforward.

“Regenerative architecture in a nutshell is projects and buildings that make the world better,” he explains.

“Sustainable implies you’re not making it any worse. Something that’s regenerative means you’re actively trying to make it better.”

Tate traces that philosophy back more than two decades to his work on the Eden Project in Cornwall.

“We used to have this thing about how awful the word ‘sustainable’ is,” he says. “If someone said to you, ‘How’s your marriage?’ and you said, ‘Well, it’s sustainable’… that doesn’t sound very positive.”

That thinking now underpins Tate + Co’s approach across its projects, which are measured against three broad themes: carbon and energy; nature and biodiversity; and people and communities.

The emphasis is not simply on reducing operational energy use, but enhancing embodied carbon performance, biodiversity, wellbeing and the relationship between developments and surrounding communities. Importantly, Tate says the approach is embedded into the design process itself rather than treated as an additional accreditation exercise.

“We review every project every week,” he says. “We ask: what are the positive outcomes? How are we doing against those outcomes?”

However, that does not mean dismissing certifications such as BREEAM or Passivhaus. Tate remains very supportive of BREEAM despite criticism that it can become overly focused on compliance and ‘tick-box’ exercises.

“I’ve got nothing against BREEAM,” he says. “The problem is that it’s almost impossible for a tick-box exercise to be correctly customised for every project.”

Instead, he argues that more focused metrics such as Energy Use Intensity (EUI) and Passivhaus Planning Package (PHPP) calculations can often be more effective because they are tightly focused on actual building performance.

Out of the niche

It has taken time, but Tate’s approach has gained traction with customers. Fifteen years ago, Tate says, his practice was viewed as highly specialist.

“We were the hippies,” he jokes. The practice specialised in one-off eco-houses, gradually branching out into larger schemes.

Today, however, the market around those ideas has changed dramatically. “The canvas on which we work now is much, much bigger,” he says. Recent projects include a low carbon innovation project for The Crown Estate and igloo Regeneration which is targeting and EUI (energy use intensity) of 35 kW/m²/yr and up-front embodied carbon of 300kg per square metre.

“The Crown Estate and igloo are trying to create market housing with broad appeal, that also meets a lot of these future-facing criteria, which is what makes this project so uniquely exciting for us” explains Tate.

Greencore Homes is aiming to build on precisely the same shift, taking homes beyond sustainability to zero-bills performance levels, while aiming for a broad customer base. The company’s ambition is not simply to prove that sustainable homes can be built, but that they can compete directly with mainstream housing delivery.

CEO, Jon Di-Stefano, says that the business originally had little expectation that its model could become mainstream. Founded in 2013, Greencore initially focused on delivering small numbers of highly sustainable homes using timber frame construction and natural materials.

“The founders started with a small number of homes using timber frame panels and natural insulation,” he explains. “At the time, I don’t think they necessarily had a vision that this could become something at much bigger scale.”

That changed in 2022, when Greencore gained funding commitment from M&G and began expanding its manufacturing capability to help scale delivery. Over the past three to four years, the company has repositioned itself around larger developments and a more scalable delivery model.

Greencore uses a Biond Panel System which is a closed timber-framed panel insulated with hemp, lime and natural wood fibre. Alongside this, its methods of construction produce homes which are ‘better than zero embodied carbon’ during construction and net zero each year in occupation. Developments are designed to achieve ultra-low embodied carbon overall, and a net zero energy balance in occupation. Greencore Homes targets and EUI of 35kWh/m²/year of 35 or less, as well as a space heating demand of 15kWh/m²/year or less. Reducing energy demand and adding solar PVs to homes creates a ‘zero bills’ outcome for occupants.

“The challenge is turning something bespoke and niche into something mainstream,” says Di-Stefano.

In the difficult middle ground

One of the more striking challenges in the move to ultra-sustainable housing delivery is the disappearance of the SME ‘middle ground’ in sustainable housing. Tate argues that very small bespoke projects can still work because they are often passion-led.

“At the scale of a single house, you’re much more in control of the process,” he says.

But projects of five to ten homes have become increasingly difficult. “The SME developer landscape now is so challenging,” he explains. “They cannot really be passion projects anymore.”

That leaves a widening gap between bespoke one-off homes and large-scale institutional developments. Ironically, Tate believes larger schemes may now offer greater opportunities for genuinely regenerative outcomes.

“At larger scale, the scope is bigger because you have more scalable power,” he says.

That includes opportunities for nature corridors, biodiversity improvements, reduced infrastructure, sustainable transport connections and broader community integration.

Greencore Homes is also heading into that space. Oliver Luard, Partnerships & Investment Director explains that the company is currently targeting a pipeline of smaller deliverable sites of up to around 100 homes, alongside longer-term strategic developments.

Funding is also critical, but as Luard explains, the sustainable approach is gaining ground with investors who have a growing appetite for environmentally-focused housing delivery.

“From an equity point of view, we very much play into an investor that is looking at their impact on the world,” says Luard.

Di-Stefano says sustainability credentials are increasingly helping the company access both public and private capital.

“We have a much better story to tell,” he says.

That applies across a wide spectrum of funding sources, from institutional investors focused on environmental impact through to government-backed housing delivery programmes. The growing importance of ESG investment strategies is clearly reshaping parts of the residential sector.

Supply chain pressure

All agree that when scaling up, it’s critical to understand the impacts on your supply chain.

Tate highlights procurement structures and supply chain maturity as major friction points. “When we were doing one-off houses, we knew the timber framers we should work with,” he explains.

Those specialist suppliers could be brought into projects early in the design process. At larger institutional scale, however, procurement systems often resist that kind of integration.

“If you’re the Crown Estate, your systems don’t really take that approach,” he says. That becomes problematic because low-carbon and regenerative projects often require close coordination between designers, manufacturers and contractors far earlier in the process.

“You’ve got to know what’s inside the walls,” Tate says. “Condensation risks, services runs, thicknesses  - all of that matters.”

Supply chain robustness also becomes a concern. “If you’re choosing an MMC supplier to build 300 homes, you would struggle to find a supplier and be completely confident they could take that workload,” he says.

Greencore faces similar questions. Luard says that while the business has no problem accessing key supplies such as timber or hemp (grown in Yorkshire), they business spends considerable time assessing supplier resilience and avoiding over-reliance on single-source specialist products.

“We have to be pragmatic when it comes to product selection,” he explains. In some cases, Greencore has had to make specify materials to ensure the supply chain remains scalable and robust. “There probably are not enough suppliers in some areas,” he adds.

However, all agree that the supply chain is gradually improving.

“There used to be maybe two timber framers in the UK,” says Tate. “Now it feels like there’s one in every county.”

Planning friction and regulation

Planning and regulation remain another recurring challenge. Greencore's Luard says many local authorities are enthusiastic about sustainable housing in principle and increasingly willing to engage early.

“We’ve had a lot of local authorities come and look around the factory to educate themselves and find out more about how we work, which is great. That means we get to have an early conversation, before we are going through the planning application process."

But translating that enthusiasm into practical approvals is often more complicated.

“Planning policy is still planning policy,” says Di-Stefano.

National regulation can also create uncertainty. While tighter environmental standards in the 2026 Building Regulations are helping push the wider market in the right direction, they can simultaneously create short-term disruption across the industry.

Greencore argues that businesses already focused on sustainable delivery are often better positioned because they have already adapted their design and construction models. Conventional housebuilders, meanwhile, may find themselves having to rapidly redesign products and delivery processes as regulations evolve.

“In theory, it’s making us a little more competitive in what we do because we’ve already taken those costs [of sustainable design] on board,” says Di-Stefano.

Luard adds that with previous regulatory uplifts, there was a rush from mainstream housebuilders to start foundations as quickly as possible to get ahead of the deadline. However, there is some hope from that sector, according to Tate.

“Major housebuilders are starting to make the right moves,” he says. At strategic masterplan level, he argues, many large developers are already recognising that greener, lower-infrastructure developments can reduce their costs.

“There is potential for a very green masterplan to actually be cheaper because there are fewer roads,” he says.

The consumer shift

But the key to growth in the sustainable homes sector is market demand. This is critical to driving the mainstream adoption of regenerative housing. All agree that there is a growing consumer awareness of the benefits of a different approach to housebuilding.

Greencore says customer interest in energy bills and operational performance has increased dramatically. The company now actively monitors home performance data across occupied developments and increasingly uses real operational energy figures within its marketing.

“We know customers are asking questions about bills,” says Luard.

That shift is helping move conversations away from abstract sustainability messaging toward practical household economics and comfort. Features such as low energy bills, better ventilation, reduced overheating and improved indoor comfort are becoming increasingly tangible selling points.

Tate believes younger generations are likely to accelerate that trend even further. He points to work is firm carried out at York St John University, where investment in greener, timber-framed buildings and biodiversity-rich public spaces has coincided with significant increases in student applications.

“Students don’t just want pubs anymore,” he says. “They want a demonstrably low-carbon, sustainable campus that thinks about wellbeing.”

Those same students, he argues, will become future homebuyers. “In ten or fifteen years’ time, they’re going to want sustainable homes that don’t need a lot of energy, that are made of timber, that look after wellbeing and have a strong connection to nature.”

Once that demand becomes mainstream, Tate believes the wider housebuilding sector will inevitably follow.

From niche to normal

It’s clear that regenerative and highly sustainable housing is no longer sitting entirely at the fringes of UK housing development.

For Greencore Homes and Tate + Co,  there isn’t a question of whether regenerative housing is technically possible; it’s whether the wider development ecosystem - planning systems, procurement structures, supply chains - can evolve quickly enough to support it at scale.

How soon will the mainstream housebuilders adopt these low-EUI, minimal embodied carbon and zero-bills designs? It will certainly be slow progress. But with impetus coming from sustainability-focused investors, and future generations of home-buyers who want lower-bills, less impact on the environment and better quality housing, there can be no doubt that these approaches are already out of their niche and building momentum.