UK Budget 2026: six property market moves investors should watch before 28 October

The biggest impact of the Budget on UK property may not come from a new tax.

It may come from what happens to the cost of debt.

On 28 October, the Chancellor will deliver the UK Budget alongside updated economic and fiscal forecasts from the Office for Budget Responsibility.

For property investors and developers, there will inevitably be plenty of headlines around Stamp Duty, Capital Gains Tax and high-value homes.

But headlines do not determine whether a property investment works.

Purchase price, debt costs, planning, development risk, demand and exit values do.

At Monta Capital, these are the six areas we believe property investors should be watching.

1. Your First Home could strengthen one part of the new-build market

The Government has already announced plans for Your First Home, a new equity-loan scheme for first-time buyers purchasing qualifying new-build homes in England.

The proposed structure is expected to allow buyers to purchase with a deposit as low as 2.5%, supported by a government-backed equity loan of up to 20%. Income limits, local property-price caps and further implementation details are expected at the Budget.

For developers, the significance is straightforward.

If the scheme increases the number of buyers capable of purchasing a new-build home, it could improve sales rates and give developers greater confidence around their exit market.

But government support does not automatically make every development viable.

The questions we would ask are:

• Does the scheme materially increase the eligible buyer pool in this location?
• At what price point?
• Will mortgage lenders support the remaining borrowing?
• Does it improve absorption without simply pushing prices higher?

For investors, those questions matter considerably more than the headline announcement.

2. The £2 million property surcharge is real. Further changes are not.

One area where it is particularly important to separate policy from speculation is the taxation of higher-value homes.

The Government has already announced the High Value Council Tax Surcharge.

From April 2028, owners of residential properties in England valued at £2 million or more are expected to pay an additional annual charge alongside Council Tax. The proposed bands currently range from £2,500 per year for properties valued between £2 million and £2.5 million to £7,500 for properties worth more than £5 million.

That measure is not a Budget rumour.

What remains open is the detailed design and whether the Government ultimately makes further changes.

For investors in London and the South East in particular, this deserves attention. A £2 million threshold captures a very different type of property in prime London than it does across much of the rest of the country.

Any increase in the ownership cost of higher-value property can ultimately affect:

buyer demand → achievable pricing → liquidity → exit assumptions.

That is how we would analyse it from an investment perspective.

3. Capital Gains Tax matters, but investor behaviour matters too

There will inevitably be speculation around Capital Gains Tax before almost every major fiscal event.

Changes are possible.

But investors should be careful not to build a strategy around newspaper predictions.

Tax changes can have second-order effects that are just as important as the headline rate.

If owners believe taxation is about to rise, some may accelerate disposals.

Others may simply decide not to sell.

That can affect transaction volumes, available stock and pricing.

Our approach is therefore relatively simple:

Do not underwrite a property transaction on the assumption that an unconfirmed tax change will rescue, or destroy, the deal.

Model sensible scenarios and make sure the investment still works.

4. We would not bet on Stamp Duty disappearing

Stamp Duty Land Tax remains one of the most criticised taxes in the property market.

It increases the cost of moving and creates friction every time property changes hands.

But it also raises substantial revenue.

For that reason, we believe wholesale abolition or replacement remains less likely than targeted changes.

There may be measures designed to support particular buyers, property types or housing delivery.

But until the Chancellor says otherwise, we would continue underwriting acquisitions using the tax regime that actually exists.

If a deal only works because you are hoping the Government changes the rules, it probably does not work.

5. The most important Budget reaction could happen in the bond market

This is the area we think receives too little attention in mainstream property commentary.

The Budget does not set mortgage rates.

But financial markets will judge whether the Government’s tax, spending and borrowing plans are credible.

That can affect gilt yields and swap rates.

And those rates feed through into the cost of borrowing offered by lenders.

The latest Bank of England data showed house-purchase mortgage approvals falling to 54,900 in August, compared with an average of around 60,100 over the previous six months.

For leveraged property investors, even relatively small changes in financing costs can materially change:

• Interest cover
• Development profit
• Cash-on-cash returns
• Refinancing assumptions
• What can reasonably be paid for an asset

That is why we will be watching the market’s reaction to the Budget almost as closely as the Budget itself.

6. Ultimately, Britain still needs more homes

Demand-side incentives attract headlines.

But Britain’s longer-term housing problem remains one of delivery.

The more important question for developers is whether Government policy makes it materially easier to turn land and existing buildings into homes.

We will therefore be watching closely for measures affecting:

• Planning
• Brownfield regeneration
• Infrastructure
• Conversion of underused commercial buildings
• Affordable housing
• Small and medium-sized developers
• Stalled development sites

For us, the test is not how ambitious an announcement sounds on 28 October.

It is whether it changes the economics or timescale of delivering a project.

Reducing a development programme by six months can sometimes have considerably more impact on investor returns than a small movement in the eventual selling price.

The Monta Capital view

Our base case is targeted intervention rather than a wholesale restructuring of the UK property market.

We expect the Budget to concentrate on:

• Further detail on first-time buyer support
• Implementation of already-announced higher-value property taxation
• Measures intended to increase housing delivery
• Selective revenue raising rather than abolition of Stamp Duty
• Maintaining confidence in the Government’s fiscal position

But the announcement itself is only half the story.

For property investors, we believe there are three questions that matter after 28 October:

1. Has the cost of capital changed?
2. Has the achievable exit changed?
3. Has the risk or time required to deliver a project changed?

If the answer to all three is no, the Budget may make far less difference to an individual property investment than the headlines suggest.

If one of them changes materially, investors should reassess their underwriting.

That is how we will be looking at it.

What happens next

Monta Capital will publish a second analysis following the Budget and the OBR’s updated forecasts.

Rather than simply summarising the Chancellor’s announcements, we will look at what has actually changed for property investors and developers, and what, if anything, we believe should change in the underwriting of UK property opportunities.

Subscribe to Inside the Room, our newsletter, to receive the post-Budget analysis.

This article is provided for general information only and does not constitute investment, legal or tax advice. Commentary reflects information available as at 7 October 2026. Government policy and market conditions may change. Appropriate professional advice should be obtained before making investment or tax decisions.