Private new housing was the biggest drag on UK construction output in the first quarter of 2026, with the sector falling 6.5% in the three months to February, according to ONS data released on 16 April 2026. Total construction output dropped 2.0% over the same period - its fifth consecutive quarterly decline.
What do the ONS figures actually show?
The ONS bulletin covers output across nine construction sectors. Six of those nine fell in the three months to February 2026, but private new housing was the main negative contributor, per the ONS Construction Output release dated 16 April 2026.
New work overall declined 3.4% in the three-month period, while repair and maintenance was flat at 0.0%. Within repair and maintenance, private housing actually bucked the trend, rising 2% - suggesting activity shifted from building new homes to maintaining existing stock.
On a monthly basis there was some relief. Output grew 1.0% in February 2026, following an upwardly revised rise of 0.5% in January 2026. Private housing new work was the main contributor to that monthly rebound, growing 4.3% in February - though that single month did not offset the broader three-month decline.
Neil Leitch, managing director of development finance at Hampshire Trust Bank, commented on the figures via Property Industry Eye (April 2026): "Developers are still operating with very little margin for error. The challenge is not just planning delays, but planning uncertainty, with even well-prepared, policy-compliant schemes facing less predictable outcomes."
Leitch added that build costs remain high, funding conditions are tighter than many expected, and land values have not always adjusted downward to reflect that shift.
What does falling supply mean for your SDLT bill?
Fewer completions means fewer new-build units entering the market. Constrained supply, all else equal, supports property values - and higher values mean higher SDLT bills on purchase.
The rate is tiered. For a standard residential purchase at £350,000 in England, the SDLT liability is £7,500. For a buyer acquiring a second property - a buy-to-let investor, for example - the surcharge introduced in October 2024 adds 5 percentage points to each band. On the same £350,000 property, that brings the total SDLT bill to £25,000. Here is how the maths works:
• 0 to £125,000 at 5%: £6,250
• £125,001 to £250,000 at 7%: £8,750
• £250,001 to £350,000 at 10%: £10,000
• Total: £25,000
Use the Property Filter stamp duty calculator to run the exact figures for any purchase price, and speak to your accountant before committing to any acquisition.
For investors running a buy-to-let stress test, acquisition cost including SDLT is a direct hit to day-one equity and yield. A deal that clears the stress test before stamp duty is factored in may not clear it afterwards. Build that number in from the start.
Will the pipeline recover?
A single strong month does not reverse a five-quarter trend. But there are signals to watch. Monthly output rose 1.0% in February 2026, with private housing new work the main contributor at +4.3%. If that momentum holds through Q2 2026, the three-month trend will begin to improve.
The structural constraint is more stubborn. Neil Leitch's comments point to planning uncertainty rather than demand weakness as the primary blocker. Until schemes get clearer approval timelines, developers will remain selective - building only where the numbers work, which limits pipeline volume and sustains the supply pressure that feeds into property values.
For investors, supply constraints may support capital growth over the cycle, but they also narrow the range of available stock and can inflate asking prices. For a broader view of how supply dynamics affect different property investment strategies, the trade-offs between new-build and second-hand stock differ significantly in a tight supply environment. Speak to your accountant about whether the full acquisition cost - SDLT included - makes the numbers work for your portfolio.
Key takeaways
• Private new housing output fell 6.5% in the three months to February 2026, the largest single-sector drag on overall construction, per ONS data released 16 April 2026.
• Total construction output dropped 2.0% over the same period - the fifth consecutive quarterly fall in the ONS three-monthly series.
• On a £350,000 second-home purchase in England, SDLT currently stands at £25,000 under the additional dwelling surcharge introduced in October 2024.
• Monthly output did recover 1.0% in February 2026, with private housing new work the main contributor at +4.3% for that month alone.
• Developers cite planning uncertainty, not demand weakness, as the primary constraint on new housing delivery.
