What the new Stamp Duty changes mean for property developers
Magnet Capital examines the Stamp Duty Land Tax (SDLT) changes that took effect on 1 April 2025 and their impact on property developers.
The main changes are:
• the nil-rate band has halved from £250,000 to £125,000 • first-time buyer relief now applies only up to £300,000, down from £425,000 • the maximum price eligible for first-time buyer relief has fallen from £625,000 to £500,000 • the surcharge on additional residential properties, such as buy-to-let and second homes, has risen from 3% to 5% • HMRC is clamping down on schemes used to reduce SDLT
The firm says developers buying blocks, converting houses into flats or acquiring portfolios should expect higher upfront tax. Combined with rising build costs, slower sales and planning delays, this puts pressure on margins across land purchases, trading and build to rent. It describes the situation as manageable, though, and characterises the post-deadline slowdown as a pause rather than a downturn, after a rush of buyers completing in the first quarter.
Magnet Capital recommends that developers revisit their appraisals, including margins, timelines and contingencies; review their funding structure, since development finance may help fill capital gaps or smooth cash flow; and take advice from solicitors and tax advisers on compliant structures, particularly for mixed commercial and residential schemes.
The lender says it has already worked with clients to reassess loan requirements and structure deals in light of the changes, and stresses the value of flexible finance and early viability planning in a tighter market.
