£20m Close Brothers Deal Signals Lender Appetite for Zero-Bills Homes

Close Brothers Property Finance has agreed a £20 million revolving credit facility with housebuilder gs8 to fund a 52-home development in Radlett, Hertfordshire, a scheme with a gross development value of £47 million. The development's headline feature — a zero energy bills guarantee for buyers — is as significant to the story as the size of the loan itself, marking a further shift in how specialist lenders are pricing risk and opportunity in the mid-market housebuilding sector.

For UK property investors, the deal matters less for its scale, which is modest by national standards, than for what it signals about lender behaviour. Development finance has tightened considerably since 2022, with many SME housebuilders reporting difficulty securing funding as banks retreated from higher-risk construction lending amid rising rates and build cost inflation. Close Brothers' willingness to extend a revolving facility — rather than a fixed-drawdown loan — against a scheme built around energy performance credentials suggests specialist lenders are increasingly rewarding developers who can demonstrate long-term running-cost advantages to buyers, not just planning consent and pre-sales.

Radlett itself is instructive. Sitting within the Hertfordshire commuter belt roughly 15 miles from central London, it has long attracted buyers priced out of Surrey's premium villages or London's zone 1–3 boroughs but unwilling to sacrifice fast rail access into the capital. Average values in Radlett sit comfortably above £700,000, and a 52-unit scheme with a £47 million GDV implies an average unit value approaching £900,000 — positioning this firmly as a family-home, owner-occupier product rather than an investment or buy-to-let play. That matters for how the scheme will absorb into the market: demand in this price bracket is driven by school catchments, space and, increasingly, running costs, rather than yield calculations.

The zero energy bills guarantee deserves particular scrutiny. With the Future Homes Standard due to tighten new-build energy requirements from 2025, developers who move early to deliver genuinely low-cost-to-run homes — typically through a combination of solar generation, battery storage, air source heat pumps and high-specification fabric performance — are positioning themselves ahead of regulatory change rather than scrambling to comply with it. For buyers facing energy bills that remain roughly 50% above pre-2021 levels despite recent falls in wholesale prices, a credible zero-bills guarantee is a powerful differentiator against comparable period or older stock, and lenders are clearly beginning to recognise this as a factor reducing sales risk rather than an added cost burden.

The wider implications extend well beyond Hertfordshire. Regional housebuilders in Manchester, Birmingham, Leeds and Liverpool operating in the £250,000–£450,000 price band face a different calculation: energy specification adds cost at a point where margins are already compressed by build cost inflation running at 3–4% annually and land values that have not corrected as sharply as some anticipated. Where the Radlett scheme can absorb specification costs into a near-£1 million average unit price, mass-market developers in the regions must weigh whether buyers in Newcastle or Liverpool will pay a premium for zero-bills guarantees, or whether volume housebuilders will instead wait for regulation to force the issue uniformly across the sector, avoiding a first-mover cost disadvantage.

Over the next 6 to 12 months, expect specialist and challenger lenders — Close Brothers, Shawbrook, Together and similar players — to continue filling the gap left by high street banks in development finance, particularly for schemes that can demonstrate ESG credentials or energy performance advantages. This should be read as a structural shift rather than a cyclical one: with mortgage lenders increasingly factoring EPC ratings and running costs into affordability assessments, and with buyers more attuned to energy security after several years of volatile bills, developments offering genuine zero-bills guarantees will command faster sales rates and potentially reduced marketing periods, improving the risk profile lenders are pricing against. For SME developers, this creates a template: energy performance is no longer a marketing add-on but a financeable asset in its own right.

For investors, the takeaway is that development finance is bifurcating. Capital is flowing more readily towards schemes that pair strong locational fundamentals — commuter access, school catchments, established demand — with credible energy performance stories, while conventional specification schemes in weaker locations face a harder search for funding. Buy-to-let landlords should note that owner-occupier-focused schemes of this type are unlikely to enter the rental market directly, but the financing precedent will filter through to build-to-rent and PRS developers seeking similar terms. Commercial and residential investors alike should treat this deal as an early signal of where development capital is heading over the next lending cycle, rather than an isolated transaction.