The new homes profitability squeeze is becoming a financeability test

Housing delivery is being constrained by viability, not ambition

The government’s target of delivering 1.5 million new homes before the next election appears increasingly difficult to achieve because the economics of development are under sustained pressure. As reported by PropertyWire, industry analysis from business sales broker Adam Walker identifies a combination of higher construction costs, planning complexity, environmental requirements and policy obligations that is preventing developers from building at scale.

For the financing market, this is more than a question of reduced developer margins. A scheme must preserve sufficient value after land, construction, professional, planning and financing costs to support an acceptable capital structure. When several inputs move adversely at the same time, the issue becomes one of financeability.

Cost inflation is reshaping scheme appraisals

PropertyWire cites the Home Builders Federation’s finding that building costs have increased by £76,000 per home since 2020. The reported pressures include landfill tax, higher community infrastructure levies, material prices, minimum wage increases and greater employer National Insurance contributions.

These costs do not affect every project in the same way. Location, construction method, planning status and development type will shape the impact. However, the direction is clear: historic assumptions may no longer provide a reliable basis for assessing present-day viability. Developers seeking finance will need appraisals that reflect current obligations and leave credible contingencies for further pressure.

High-rise projects face an additional design challenge. PropertyWire reports that post-Grenfell requirements for second staircases can result in typical developments losing two flats per floor. That reduces saleable density and gross development value while many core delivery costs remain. From a funding perspective, this can weaken leverage metrics and increase the amount of equity required to make a scheme workable.

Values and land prices are not adjusting at the same pace

The article also highlights price falls in many areas while land costs remain elevated. This mismatch matters because developers cannot assume that higher costs will be absorbed through stronger exit values. If sales values soften and the land basis remains fixed, the residual margin available to absorb delays, cost overruns or slower sales narrows.

Lenders and investors are therefore likely to place greater emphasis on the evidence supporting land value, projected sales rates and exit pricing. Sensitivity analysis becomes central. A scheme that works only at its strongest valuation or fastest sales pace may struggle to support the same level of debt as one with multiple viable exit scenarios.

Affordable housing obligations require a deliverability test

PropertyWire states that social housing requirements can reach 50% on some developments. Walker argues that accepting 40% to 45% affordable housing on a 100-unit scheme could deliver more social housing than insisting on 50% where that requirement makes the project financially unviable.

The broader financing point is that policy obligations should be assessed against actual delivery. A higher percentage has limited practical value if the scheme cannot secure capital or begin construction. This does not remove the need for affordable housing, but it reinforces the importance of structuring obligations around a robust, transparent viability assessment.

The effects extend beyond the new-build market

The consequences are not limited to developers. PropertyWire notes that new-build availability supports downsizers and chain-dependent transactions in the resale market. Fewer completed homes can therefore restrict movement across a wider part of the residential sector, even where estate agents receive limited direct income from new-home sales.

For investors and lenders, that connection makes supply constraints relevant to both development exits and broader housing market liquidity. Local demand may remain present, but transaction chains can still depend on suitable new stock being available at the right price and stage of completion.

Policy change should be treated as potential upside

The interventions discussed by Walker include reducing or abolishing landfill tax, lowering community infrastructure levies, relaxing second staircase requirements where fire protection is robust, and adjusting social housing percentages. PropertyWire notes that no official government response has been confirmed.

Developers should therefore distinguish between schemes that are viable under current rules and those that rely on future concessions. Policy changes could improve deliverability, while economic conditions or lower land values may ease some pressures, but these outcomes are not certain. In the present market, credible cost plans, realistic values, sufficient equity and clearly tested downside scenarios will remain central to funding discussions.