Revealed: 2025 Budget Property Changes Every Investor Needs to Know

After weeks of speculation, the Chancellor of the Exchequer, Rachel Reeves, announced the 2025 Budget on Wednesday. Rumours of sweeping reforms – from an annual tax on properties over £500,000 to replacing stamp duty with a national property tax and even extending Capital Gains Tax to main residences – had frozen the market for months. While many of those proposals did not materialise, the 2025 Budget property changes that were announced still carry significant implications for valuations, rental performance and investment strategy across the sector.

Below, we break down the key changes for property professionals, when they take effect and how they are expected to influence the property market.

Mansion tax for properties over £2 million (from 2028) 

One of the most significant 2025 Budget property changes is the introduction of a new annual surcharge on high-value properties, called the High Value Council Tax Surcharge, which is set to be implemented in April 2028, as follows:

High Value Council Tax Surcharge, on property valued at:

• £2 million to £2.5 million – £2,500
• £2.5 million to £3.5 million – £3,500
• £3.5 million to £5 million – £5,000
• Over £5 million – £7,500

Rightmove data shows that less than 0.5 per cent of sales agreed this year were for properties over £2 million, and around 1 per cent of homes currently listed for sale are priced above this threshold.

Colleen Babcock, property expert at Rightmove, warned: “Sellers of homes priced very close to the £2 million mark may need to ask for £1.99 million to avoid putting off potential buyers.”

Nick Leeming, Chairman of Jackson-Stops, called the measure “one of the most significant changes to the UK housing market for decades,” adding: “What concerns me is the greater economic consequences beyond the Chancellor’s tax grab, leaving £2m homeowners who are mortgaged having the potential to slip into negative equity as prices realign.”

Landlord property income tax rate rise (from 2027) 

Another key component of the 2025 Budget property changes is the two-percentage-point rise in property income tax for individuals earning income from property, which comes into effect in April 2027:

• Basic rate – 22 per cent
•  Higher rate – 42 per cent
• Additional rate – 47 per cent

This follows a decade of mounting pressures, including changes to mortgage interest relief, higher stamp duty on additional homes and increased compliance under the Renters’ Rights Act, with the OBR warning that falling landlord returns will “reduce the supply of rental property… risking a steady long-term rise in rents if demand outstrips supply.”

No change to stamp duty (SDLT) 

Perhaps the biggest surprise was what the Budget didn’t include. Despite industry pressure, no stamp duty reforms were announced. SDLT thresholds and rates remain unchanged, much to the disappointment of agents, buyers and developers hoping for a stimulus.

Damien Jefferies, Founder of Jefferies London, commented: “Stamp duty remains one of the most obstructive elements of the entire housing system, slowing transactions at every level and adding unnecessary friction to the process of moving home. By leaving it untouched, the Chancellor has failed to address one of the most significant barriers facing buyers and sellers in what is already a cautious market.”

No capital gains tax for main residences 

Following rumours of a major policy shift, the government confirmed there will be no capital gains tax on primary residences. The clarity was welcomed across the sector, with many noting the prolonged speculation had triggered delays and fall-throughs at the top end of the market.

Shepherd Ncube, CEO of Springbok Properties, commented: “The rumours around Capital Gains Tax created hesitation throughout the market and delayed thousands of transactions, so today’s clarity will come as a relief to homeowners. Confirming that the exemption remains intact removes a major source of uncertainty and gives buyers and sellers the confidence to move forward again.”

Overhaul of taxation on asset income (2026–2027) 

Several wider tax reforms in the 2025 Budget will affect property investors with diversified portfolios. Key changes include:

• Property and savings income: Rates rise by two percentage points from April 2027 (to 22, 42 and 47 per cent)
• Dividend income: Basic and higher rates rise from April 2026 to 10.75 and 35.75 per cent; the additional rate remains 39.35 per cent
• ISA changes: Annual cash ISA limit reduces to £12,000 for under-65s from 2027; however, the overall annual ISA allowance remains at £20,000, meaning the remaining £8,000 can be placed in other ISA types (for example, a Stocks & Shares ISA)
• Allowances unchanged: Rent a Room Scheme and property allowance remain

Frozen tax thresholds 

Income tax thresholds, including the personal allowance, remain frozen until April 2031, increasing fiscal drag and pulling more taxpayers into higher tax bands.

Planning reform and housing supply changes 

The government confirmed a major overhaul of the planning system through the forthcoming Planning and Infrastructure Bill. These reforms form a critical part of the 2025 Budget property changes, aimed at unlocking development and increasing housing supply and feature measures to facilitate:

Faster planning decisions

• Targeted pre-application engagement, expected to cut delivery times by up to 12 months
• Judicial Review reforms, removing the paper permission stage and blocking appeals deemed “totally without merit”, reducing delays by up to 6 months
• Fast-tracking 150 major Nationally Significant Infrastructure Projects during this Parliament
• Expansion of pro-growth NPPF changes, including a default “yes” to development around train stations
• £48 million investment to boost planning capacity, supporting 350 new planners, a new Planning Careers Hub and a total uplift of 1,400 planning staff across the system this Parliament

Boost in housing supply

• Delivery of 1.5 million new homes during this Parliament
• Progress on three new towns, each delivering at least 10,000 homes – Tempsford, Leeds South Bank and Crews Hill & Chase Park – with final locations to be confirmed in spring 2026 following Strategic Environmental Assessments
• £1.3 billion devolved from the National Housing Delivery Fund to seven mayoral authorities: Greater Manchester, Greater London, Liverpool City Region, North East, South Yorkshire, West Midlands and West Yorkshire

Grey Belt and land release initiatives

• Grey Belt reforms now driving delivery, with 80 per cent of major residential appeals approved since December 2024
• An estimated 170,000 additional homes expected by 2029–30
• Defence Housing Strategy releasing surplus MoD land to deliver 100,000 homes, backed by £1.5 billion this Parliament and £9 billion over the decade

Additional housing-related measures 

• Social Rent convergence, where prices will be standardised, confirmed, with a final model due in January 2026
• New broadband rights for leaseholders, requiring freeholders to permit gigabit-capable upgrades unless refusal is reasonable
• Landfill Tax differential frozen, preventing cost increases for housebuilders
• Making Tax Digital for landlords with a turnover above £50,000 takes effect from April 2026

Other Budget measures affecting property businesses 

Several wider business reforms are relevant to property firms, developers, construction businesses and landlords, including:

• Permanent 40 per cent first-year allowance for qualifying capital expenditure
• Extension of 100 per cent first-year allowances for zero-emission vehicles and charge points to 2027
• Ten-year business rates relief for EV chargepoints and EV-only forecourts
• A new pay-per-mile tax for electric vehicles from April 2028
• Mandatory e-invoicing requirements from April 2029, affecting medium and large companies.
• Reforms to international tax rules that may impact property groups with overseas structures.

Market outlook

The OBR’s latest Economic and Fiscal Outlook forecasts a slower-growth, high-tax environment shaping the property market over the next five years.

• GDP growth is expected to average 1.5 per cent, constrained by weak productivity
• Inflation forecast to remain above target until 2027
• Interest rates expected to fall gradually, reaching around 3.6 per cent in 2026 before edging toward 4 per cent by 2030

For landlords, the April 2027 property income tax rise is expected to reduce returns and restrict rental supply, placing upward pressure on rents. Housing transactions should stabilise from 2026, but activity will remain sensitive to borrowing costs, regulation and fiscal drag.

With public debt around 96 per cent of GDP and taxation forecast to reach 38 per cent of GDP, the fiscal environment remains tight, leaving the potential for further adjustments in future Budgets open, meaning more uncertainty for the property sector.

How are the new Budget measures going to affect your property business?