BLOGS

The UK government has staked its housing credibility on a target that most independent forecasters consider heroic: 1.5 million new homes delivered by 2029. Mandatory local housing targets are back, planning reform is moving through the system, and ministers have pledged billions through Homes England to unlock stalled supply. Yet on the ground, the builders most capable of filling the gaps between the volume housebuilders' large strategic sites — Britain's small and medium-sized (SME) developers — are under greater financial pressure than at any point in recent memory.

The numbers tell a stark story. According to data cited by CapitalRise and the Federation of Master Builders, SME housebuilders delivered around 40% of all new homes in the UK four decades ago. Today, that share has collapsed to roughly 12%. Bank lending to SME property developers has almost halved over the same period — from approximately £9.7 billion in January 2017 to £4.9 billion by late 2024, according to Bank of England data — as mainstream lenders retreated from the sector and regulatory capital requirements made smaller, more complex loans increasingly unattractive to hold.

The finance cost squeeze: when borrowing becomes the barrier

Development finance pricing defines viability for SME builders in a way that simply does not apply to volume housebuilders drawing on revolving corporate facilities and deep land banks. When base rates were near zero, development finance was available at 5–7% all-in. The rate cycle of 2022–2024 changed that entirely.

With the Bank of England base rate peaking at 5.25% before its measured descent to 4.25% by May 2026, development finance rates followed suit. Stretched senior facilities — the product most commonly used by SME builders seeking to maximise leverage — peaked above 0.90% per month (equivalent to roughly 11–13% annualised) at the top of the cycle. Even today, with rates falling, challenger bank senior development finance is typically priced at 7.5–10% all-in for loans up to 65–70% of gross development value (GDV), while stretched senior products for higher leverage still sit at 9.5–12.5% depending on the borrower and site quality, according to market data from Fox Davidson.

The practical impact is severe. Research from estate agency Hamptons estimates that elevated finance costs added £3,125 to the build cost per home in 2025 alone, up from £2,934 in 2024. Across the sector, Hamptons calculates the cumulative additional financing burden at an estimated £264.5 million more than a decade ago. For an SME developer building twenty or thirty homes, even a 200 basis-point rise in their borrowing rate can tip a marginal site from viable to loss-making without any change to the underlying land price, build programme, or sales assumptions.

REalyse planning and development data illustrates how this pressure is translating into behaviour on the ground. Small scheme planning activity — applications for sites broadly in the sub-100 unit bracket — shows signs of a cooling trend through 2025, with small-site grant counts declining from Q3 2025 into Q1 2026. Meanwhile, large and mega-scheme applications continue to dominate unit volumes approved, reflecting how institutional capital and volume builders are better placed to absorb the current cost environment.

Planning: a structural drag on small sites

Finance costs are only one dimension of the squeeze. The planning system has long been accused of operating at a scale that disadvantages small developers, and recent data reinforces that view.

A 2025 report from the Home Builders Federation (HBF) and Quantum Development Finance, drawing on analysis from planning consultancy Lichfields, found that just 17,000 homes were approved on small sites of three to nine units in 2024 — roughly half the historical average of around 35,000. The proportion of total planning permissions granted on sites of 150 units or fewer has fallen from nearly 20% in 2008 to just 6–8% today. A survey by HBF and Travis Perkins at the end of 2024 found that 51% of SME housebuilders waited over a year to obtain planning permission, a delay that compounds finance costs directly: every additional month of pre-construction carry means more interest accruing on land acquisition and bridging facilities.

REalyse data captures these dynamics in the live planning pipeline. In Q1 2026, small residential schemes logged 849 granted applications representing around 1,400 units — a figure dwarfed by large-scheme grants, which delivered nearly 10,400 units from just 219 decisions in the same period. The mismatch speaks to a structural bias in planning throughput: smaller sites receive proportionally fewer approvals per unit of housing need met, yet they are precisely the projects that SME builders can actually deliver.

The withdrawal signal

One of the more telling indicators in the planning data is the withdrawal rate. REalyse data shows a consistent pattern of small-scheme withdrawals — applications pulled before a decision is reached, often because the applicant has lost confidence in viability or run out of runway on bridging finance. In Q1 2026, 131 small-scheme applications were withdrawn across the dataset. For context, that is a withdrawal rate that, at a site level, represents significant sunk cost in planning fees, consultant reports, and months of management time — costs that volume builders can absorb and small developers frequently cannot.

Off-plan sales collapse: the cash flow crisis hiding in plain sight

For SME developers, the ability to sell homes off-plan — before they are built — is not merely a marketing preference. It is a cash flow tool that allows developers to demonstrate sales velocity to lenders, trigger drawdown tranches, and ultimately pay down expensive development finance earlier. When off-plan sales dry up, finance rolls for longer, costs compound, and lender covenants come under pressure.

The data here is alarming. Research from Hamptons found that just 33% of new homes in England and Wales were sold before completion in 2025 — a 12-year low, down from 36% in 2024 and a peak of 49% in 2016. The slide reflects a confluence of factors: buy-to-let landlords retreating from the market in response to the stamp duty surcharge increase to 5% on second homes (introduced at the end of 2024), the Renters' Rights Act, and the lingering impact of mortgage rate volatility on owner-occupier confidence. The end of Help to Buy in March 2023 removed a key demand catalyst that had disproportionately underpinned new-build sales on smaller sites.

The geographic pattern is uneven. Southern England — London, the South East and South West — has recorded the sharpest falls in off-plan activity over the past decade, according to Hamptons, reflecting both the higher absolute price points that stretch buyer affordability and the sharper structural retreat of the buy-to-let investor class in those markets. For small developers operating in these regions, where land values are highest and viability margins therefore tightest, the combined impact of lower pre-sales and higher finance costs is particularly acute.

Government intervention: ambitious, but not yet at scale

Ministers are not blind to the problem. The government has framed SME housebuilders as central to its housing plan, with Deputy Prime Minister Angela Rayner stating that smaller housebuilders "must be the bedrock" of the drive to deliver 1.5 million homes. A £700 million extension to the Home Building Fund for SMEs was announced by Homes England, supporting up to 12,000 additional homes. An SME Accelerator Loan product has since been launched for qualifying developers building five or more homes on a single site in England. Homes England has also expanded its Lending Alliance with Invest & Fund, creating a revolving fund for smaller builders accessing loans up to £2.5 million at up to 80% loan-to-cost.

In the private market, some lenders are responding. Assetz Capital cut its development finance rate to 8.85% in April 2025 explicitly to support SME delivery. Several challenger banks — including Shawbrook, Aldermore and Paragon — have rebuilt appetite through 2025 and into 2026, with competition beginning to bring stretched senior pricing down from its 2023–2024 peak.

The HBF, however, argues that if structural barriers were genuinely addressed — across planning, finance, and section 106 obligations — SME builders could deliver up to 100,000 additional homes per year above current output. That figure represents a substantial proportion of the government's annual target of around 300,000 homes. Without it, the arithmetic of 1.5 million homes becomes very difficult to reconcile.

REalyse data on the active development pipeline reflects the tension. Large and mega-scheme pipeline volumes remain substantial, with tens of thousands of units in progress across major consented schemes. But the planning and viability environment for small sites — where SME builders actually operate — has not yet shown the recovery that government policy alone can deliver.

Outlook: a structural problem that rate cuts alone will not fix

The gradual descent of the Bank of England base rate is welcome news for the sector, and development finance pricing is beginning to respond. But SME housebuilders face a structural challenge that monetary policy easing will not fully resolve. Bank lending to the sector has been in secular decline for nearly a decade. The planning system continues to process small sites slowly and at relatively low approval rates. Off-plan sales remain at generational lows. Build cost inflation, while easing, has permanently reset the cost base for construction.

The government's planning reforms — including mandatory housing targets and revised NPPF guidance — are the right direction of travel. But planning reform takes years to filter through to completions, and many of the sites that SME builders could bring forward today are stalling not on planning, but on viability. What the sector arguably needs is a more targeted viability support mechanism for marginal small sites: lower-cost patient capital, reduced section 106 burdens on smaller schemes, and faster discharge of planning conditions that currently extend finance carry unnecessarily.

Without that, the risk is a housing delivery model that becomes increasingly bifurcated: volume builders delivering large strategic sites at scale, while the diverse, locally embedded ecosystem of small developers — which once built nearly half the nation's homes — continues to contract. That would leave the government's ambitions resting on fewer, larger schemes, with less competition, less geographic spread, and ultimately fewer homes than the 1.5 million target demands.