London's housing delivery problem remains unresolved despite a sharp recovery in reported starts, as new Office for National Statistics figures show construction output across Great Britain fell by 0.5% in the three months to July 2026. The ONS construction output release published on 11 September shows new work fell by 0.4% and repair and maintenance by 0.7%. Housing-related work accounted for some of the clearest weakness: public housing new work fell 8.4% over the three-month period, while private housing repair and maintenance fell 1.7% and made the largest negative contribution to the overall decline.
The national figures should not, however, be presented as London construction output. ONS publishes regional construction data separately on a quarterly, non-seasonally adjusted and current-price basis. London Construction Magazine has therefore compared today's national signal with separate official housing delivery evidence for the capital rather than applying the 0.5% fall directly to London.
Residential development under construction in Woolwich, south-east London. Original Image: London Construction Magazine.
Housing is a clear weak point in the latest construction data
The ONS figures show a mixed rather than uniform housing downturn. Within new work, public housing new work fell 8.4% in the three months to July, the largest negative contribution within new work. Private housing also weakened, but on a different time basis. In July alone, private housing new work fell 4.9%, making it the largest contributor to the month's 0.4% fall in new work. At the same time, private housing repair and maintenance rose 1.7% in July, helping total construction output edge 0.1% higher for the month.
That distinction matters. The latest statistics support describing housing as a drag on construction, but they do not show every part of housebuilding falling at the same rate. The largest negative contribution across the three-month period was private housing repair and maintenance, while the sharp 4.9% private new-build fall relates specifically to July.
London starts recover while completions move lower
London's own delivery figures are equally uneven. MHCLG building-control statistics record 10,870 new-build starts in London in the year to 31 March 2026, up 161% on the previous year. Yet completions fell 7% to 17,750 over the same period. The unusually large percentage increase in starts therefore needs context. It represents a recovery from a very weak previous comparison period rather than evidence that London's housing delivery problem has been solved. Starts, completions, net additions and construction output are also different measures and should not be treated interchangeably.
Affordable housing provides another measure of the gap. The London Assembly's Affordable Housing Monitor 2026 records 14,335 starts under the 2021-26 Affordable Homes Programme by March 2026, below the revised target of 17,800 to 19,000. The deadline has since been extended by up to six months on a case-by-case basis. This fits the wider delivery problem London Construction Magazine identified in its review of the construction market during the first half of 2026: housing has remained one of the capital's weakest major sectors even while infrastructure, selected prime offices, refurbishment and strategically funded regeneration continued to generate work.
The planning pipeline is not the same as construction output
London does not simply lack housing proposals. City Hall's work on the next London Plan says the capital has a substantial pipeline of sites and consented housing, while also identifying construction costs, labour shortages, higher interest rates, funding constraints, regulatory changes and market absorption as challenges affecting delivery.
LCM has previously examined the widening gap between London projects with planning approval and projects actually reaching construction. Planning permission establishes that development is permitted; it does not establish that finance is in place, Gateway approvals have been secured where required, a main contractor has been appointed or physical construction has started.
Building safety regulation remains part of that delivery chain for higher-risk residential projects, but it should not be used as a single explanation for London's housing weakness. The latest LCM Gateway 2 analysis showed London new-build approvals reaching 90% in the 12 weeks to 31 August, although determination times and the volume of live applications remain programme considerations.
London still faces a large gap between need and delivery
The scale of the challenge becomes clearer against London's planning requirement. City Hall says the Government's standard method identifies housing need of 87,992 homes a year, which the next London Plan is expected to plan for across the capital.
That figure is a housing-need and planning benchmark, not a direct construction-output target, so it cannot be compared one-for-one with building-control starts or GLA-funded affordable housing starts. It nevertheless shows the scale at which London would need residential delivery to operate compared with present levels.
The next tests will come quickly. ONS is due to publish its next monthly construction output release on 15 October, while the next GLA affordable housing statistics covering April to September 2026 are scheduled for 10 November. The key London measure will be whether the recent rebound in starts converts into sustained construction activity and, ultimately, completed homes rather than another increase in pipeline without delivery.
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Expert Verification & Authorship: Mihai Chelmus Founder & Editor, London Construction Magazine | Construction Testing & Investigation Specialist |