From the ninth floor of Regent's View in Bethnal Green, Berkeley Group executives survey a telling panorama of London's housing transformation. The £900,000 two-bedroom flats represent the 30-year gentrification wave that propelled Berkeley to FTSE 100 status. Yet executive chair Rob Perrins admits that today's regulatory environment would prevent such developments from even starting.

A perfect storm of higher taxes, building levies, and safety reforms has brought London residential construction to a near standstill. The Building Safety Act added two years to development timelines after the Grenfell Tower tragedy, while the 35 percent affordable housing requirement cut developer margins. Last year, London built less than 8 percent of the new homes needed to meet government targets.

Berkeley has weathered the storm better than competitors, with shares down 20 percent versus nearly 60 percent for rivals like Barrett and Vistry. The company's operating margin remains above 20 percent despite average selling prices falling to £570,000. At Regent's View, Berkeley invested £120 million on a 4.5-acre site, with only a third of homes designated affordable. Until land development becomes financially viable again for homebuilders rather than storage companies, London's housing shortage will continue worsening.