The Autumn Budget announced on 26 November 2025 brought in several changes but some will only impact homeowners in England.

New “Mansion Tax” (High‑Value Council Tax Surcharge)

England only: From April 2028, homeowners with properties valued at £2 million or more will pay an additional annual surcharge alongside council tax, starting at £2,500 and increasing to £7,500 for homes over £5 million. While this affects fewer than 1% of UK properties, and primarily those in London and the South East. This may slow down sales within these price points, which might impact those relocating to Wales.

Increased Tax on Rental and Property Income

From April 2027, income from rental properties will be taxed at 22% (basic), 42% (higher), and 47% (additional), a 2% hike across all bands. This will likely see rents rise by at least 2% to cover the increase in costs to landlords.

Stamp Duty Remains Unchanged

England only: Contrary to speculation, no changes to Stamp Duty Land Tax (SDLT) were made—existing thresholds, bands, and first-time buyer reliefs are fully retained.

Whether you’re buying, selling, or letting, now is a good time to plan ahead. Contact our local team to talk through how the Autumn Budget might affect your property goals and find out how Dafydd Hardy can support your next move.