The full-year results from Berkeley Group (LSE: BKG) land at a moment of political transition. Sir Keir Starmer has resigned as Prime Minister, and Burnham, the outgoing Mayor of Greater Manchester, is poised to take the keys to Number 10. Berkeley's numbers, and the demands attached to them, amount to a stress test: will the new government choose pragmatic deregulation to unblock supply, or pursue an ideological reset centred on social housing? The answer matters well beyond one housebuilder's balance sheet.

London's housing delivery gap in numbers

The headline financials paint a picture of managed decline. Pre-tax profit fell 15 per cent to £451m in the year to April, according to the company's results filing. Revenue slipped four per cent to £2.4bn, remaining above analyst expectations, while earnings per share dropped 11 per cent to 332p, marginally undershooting forecasts. Forward sales fell 28 per cent year on year to £1bn.

Shares in the FTSE 250 firm had already dropped 17 per cent in a single session in April after Berkeley announced it would stop buying land in London, as first reported by City A.M. The company cited an "unprecedented increase in cost and regulation" and stood by that decision when publishing its full-year numbers.

But the more consequential data point sits outside the income statement. Berkeley warned that London is delivering less than 10 per cent of its annual government-set housebuilding target. Apartment schemes in the capital now take eight years to complete, the company said, compared with five years a decade ago. That three-year extension is not a cyclical blip; it reflects layer upon layer of planning requirements, building safety regulation, and tax.

In May, Berkeley said it can "no longer invest" in London after a planning inspector blocked its proposal to build 867 homes on the site of a Peckham shopping centre, according to the company's public statements. The decision crystallised a trend the firm had been signalling for months: the risk-adjusted returns on London brownfield regeneration no longer justify the capital deployed.

Berkeley's policy demands: stamp duty, planning, and Homes for London

Rob Perrins, Berkeley's executive chair, used the results to issue a detailed set of demands to Westminster. He praised the outgoing Labour government for doing an "excellent job in restoring the fundamentals of housing policy, which had been abandoned by its predecessor," according to the company's filing. But he warned that policymakers must go further.

Berkeley's central ask is a cut in stamp duty on new homes to three per cent, with the rate reduced to zero for first-time buyers. The company also called for the scrapping of stamp duty surcharges on second homes, arguing that they "deter vital investment in new build homes."

The second demand is procedural. Berkeley wants City Hall's Homes for London plan, an emergency package designed to accelerate delivery in the capital, implemented immediately and kept in place until London meets its housebuilding targets.

"The excessive tax burden, that was introduced in a different economic paradigm, must be reduced to unlock demand and attract the essential investment without which regeneration schemes cannot proceed," Perrins said, according to the company's results statement.

Berkeley claimed that, if its proposals were adopted, London would meet its housebuilding target, tax revenues would increase, and GDP would grow by one per cent. The company did not publish the modelling behind that figure.

The tone is notable. This is not a routine lobbying exercise buried in an appendix. Berkeley placed its policy demands at the centre of a full-year results announcement, a signal that it views the regulatory environment as a more material risk than the property cycle itself.

What Burnham's arrival at Number 10 means for housebuilding

Burnham is expected to launch a shake-up of housebuilding policy with a focus on boosting social housing delivery, according to analysts at Panmure Liberum. That ambition could collide with Berkeley's agenda.

The most immediate flashpoint is the Affordable Homes grant programme. Panmure Liberum analysts warned on Tuesday that a possible redrawing of the programme could delay payments and "push back the delivery of social and affordable housing units." Any pause in grant disbursement would ripple through housing associations and their contractor supply chains.

Yet the same analysts noted Burnham's track record in Manchester. "During his time as Mayor of Manchester, Burnham has shown to be a pragmatist, and we suspect he would be reluctant to quickly impose measures that would disrupt the delivery of initial funds," they wrote.

That pragmatism will be tested quickly. Berkeley's warning that London apartment projects now take eight years to deliver means any policy change made in 2026 will not show up in completions data until the mid-2030s. A government that disrupts existing pipelines in pursuit of a new model risks a supply gap that no amount of grant funding can fill in the short term.

Perrins noted that the knock-on effects of the Iran war had scuppered the "optimism" felt by the construction industry at the start of this year, returning the property market "to being characterised by caution and lacking in urgency," according to the company's filing. That external drag makes the domestic policy environment all the more consequential.

What operators in property and construction should watch

Berkeley's results carry implications far beyond its own share price. Three areas deserve close attention from operators across the construction and property supply chain.

Land market signals

Berkeley's decision to halt land purchases in London removes one of the capital's most active buyers of complex brownfield sites. Subcontractors, demolition firms, and remediation specialists that depend on Berkeley-led schemes face a thinner pipeline. If other volume builders follow suit, land values in outer London boroughs could soften, creating opportunities for smaller developers with lower return thresholds, but only if the planning environment allows them to build.

Affordable Homes programme continuity

Any restructuring of the Affordable Homes grant programme under Burnham would affect registered providers, construction firms contracted to deliver Section 106 obligations, and local authorities relying on developer contributions to fund infrastructure. Operators should monitor Burnham's first housing policy statement for signals on grant timelines and eligibility criteria.

Stamp duty reform

Berkeley's call for a cut to three per cent on new homes, and zero for first-time buyers, would shift demand dynamics in the new-build market. Whether Burnham adopts, modifies, or ignores that proposal will shape sales velocity for every developer with London exposure. A reduction in the second-home surcharge, if enacted, would also affect the build-to-rent sector, which relies on institutional investors currently subject to the higher rate.

Berkeley itself remains bullish on London's long-term fundamentals. The company said the capital's outlook "remains hugely compelling" despite "the most challenging of conditions," according to its filing. That conviction, set against a decision to stop buying land, captures the tension at the heart of the story. The economics of London housing still work in theory. In practice, the regulatory and fiscal framework has made them unworkable for the city's largest builder.

Burnham's response will determine whether that gap closes or widens.