Shares in London-listed housebuilders surged on Monday as investors anticipated that a potential Iran war peace agreement and a possible revival of the Help to Buy scheme could provide a much-needed boost to Britain's struggling property market.

FTSE 100 constituent Persimmon rose more than four per cent to 1,152p, while mid-cap Vistry climbed six per cent to 310p. Barratt Redrow gained three per cent, Berkeley advanced nearly three per cent to 3,594p, and Bellway jumped four per cent to 2,076p.

Analysts attributed the broad rally to two factors: renewed optimism surrounding a Middle East peace agreement and reports that the government is reviewing measures designed to stimulate housing demand.

UK housebuilder shares have declined sharply since the Iran war began in February, as the sector grapples with escalating construction costs and deteriorating consumer confidence. Major firms have halted construction projects and land acquisition in an effort to strengthen their balance sheets. Vistry reported a £30m first-half loss in June, and Taylor Wimpey cut its dividend and reduced its house completion targets last week. The downturn has compounded pressure on a sector that is among Britain's largest employers and is central to addressing the country's persistent housing shortage, with successive governments having missed annual housebuilding targets for years.

Anthony Codling, an analyst at RBC Capital Markets, told City AM that improved prospects for an Iran peace deal would "lead to a reduction in mortgage rates, aiding housing affordability and demand."

US President Donald Trump stated on Monday that an agreement to end the fighting in the Middle East is "imminent." He told reporters: "I'm not looking to kill people."

Help to Buy Revival Under Review

Codling also noted that reports of the government considering a revival of the Help to Buy equity loan scheme may have further fueled the rally in housebuilding stocks.

"A return of Help to Buy would, clearly, be welcome news for all the mainstream housebuilders and lead, in our view, to share price outperformance," he said.

Housing minister Matthew Pennycook is "actively reviewing" a potential return of the scheme, which provided loans to assist first-time buyers, according to The Times.

The original Help to Buy equity loan programme, launched in 2013 under then-Chancellor George Osborne, allowed purchasers to borrow up to 20 per cent of a new-build property's value interest-free for the first five years, with the government retaining an equity stake in the home. It became one of the largest state interventions in the UK housing market in decades before being discontinued in 2023 over concerns that it inflated house prices, though it has generated a £1.74bn profit for the Treasury to date.

A spokesperson for the Ministry of Housing, Communities and Local Government moved to temper expectations, stating: "There are no current plans to introduce a new Help to Buy scheme."

Steve Turner, executive director of the Home Builders Federation, urged action: "If [the] government is serious about housing it surely has to do something to kickstart the market."

Turner called on Labour to publish its review of Help to Buy to dispel what he described as "myths" about the scheme's effect on house prices, which he said "have no basis whatsoever."

A spokesperson for Taylor Wimpey told City AM the company would welcome measures from the government to "unlock demand and support housing delivery."

Russ Mould, investment director at AJ Bell, said it is "perfectly possible" that speculation around a new Help to Buy programme combined with optimism over a US-Iran peace deal are driving the housebuilder rally.

"The builders have been terrible performers and many of them now trade below tangible book value per share, so it may not take much good news to prompt some investors to take a second look," he said. With the government's review ongoing and Middle East diplomacy still in flux, investors are likely to scrutinise upcoming Bank of England rate decisions and any further government housing announcements for confirmation of the sector's nascent recovery.