New-Build Buy-to-Let Mortgages & Advice

New-build buy-to-let mortgages: check the investment before you reserve

Buying a newly built property to rent out? The proposed rent, lender valuation, developer incentives and completion date can all affect your mortgage. We can help you work through those questions before a reservation deadline puts you under pressure.

No fee for our initial evaluation. We explain any chargeable advice fees before work begins. A lender makes the mortgage decision.

Start with the property

Four checks before paying a reservation fee

A buy-to-let application looks at the property as a rental investment as well as your circumstances. A new build adds questions about the plot, proposed letting use and when the home will actually be ready.

Can it be let as planned?

Confirm whether it is a house or flat, its tenure and any lease, planning or estate restrictions. Tell your adviser if you intend to let to students, holiday guests or family: those uses may need a different mortgage route.

What rent is realistic?

Compare similar local lets and ask a letting agent for a reasoned estimate. An advertised rent is not a promise that a tenant will pay it or that a lender will use it.

What has the developer offered?

Get the full package in writing, including deposit contributions, paid fees, upgrades and any rental guarantee. Disclose it to your adviser and solicitor; a lender may treat incentives differently.

When might you complete?

Ask for the expected completion window and reservation terms. Your solicitor should explain the exchange deadline, delay clauses and what happens if the purchase cannot proceed.

Buying to live in the property? The lending and affordability route is different. Read our new-build home mortgage guide instead.

Income from a property that is not yet let

How a lender may assess the proposed rent

A buy-to-let lender commonly considers the rent it expects the property to achieve, often informed by its valuer, alongside the loan, interest-rate assumptions and its own rental coverage rules. It may also look at your personal income, existing properties, credit history and landlord experience. The method differs between lenders and products, so a letting agent’s figure alone cannot establish how much you can borrow.

For a new-build flat, the lender may also consider the block, lease, service charges and the valuation. If the valuer’s rental estimate or property valuation is lower than expected, the borrowing available could change. Discuss that possibility before agreeing a purchase price that leaves little room in your cash budget.

Illustrative planning example, not a lender calculation

Gross rent is not money you can spend

An agent suggests £1,500 a month in rent. Before treating that as income, allow for service charges, insurance, maintenance, letting fees, periods without a tenant, tax and mortgage payments. A lender will make its own rental and borrower assessment; this example does not predict acceptance, borrowing or profit.

Our buy-to-let mortgage overview covers the wider application route. For an established portfolio, tell us about the existing properties and borrowing so the full position can be considered.

The full cash commitment

Deposit, valuation, incentives and running costs

There is no deposit percentage that applies to every new-build buy-to-let purchase. Available loan-to-value limits can depend on the lender, property type, valuation, ownership structure and incentives. A flat and a house may be treated differently. Check current product criteria for the particular property rather than budgeting from a general rule.

The lender may value the property below the price agreed with the developer. It may also limit or assess developer contributions in its own way. Make sure the true cash deposit, source of funds and all incentives are clear before you exchange contracts.

Buying costs

Allow for legal work, lender or broker charges where applicable, valuation, property tax and any reservation fee. Property transaction tax differs across England and Northern Ireland, Scotland, and Wales; ask your solicitor to check the current rules for your purchase.

Property costs

Check the lease and projected service charge, ground rent where applicable, warranty documents, insurance, furnishing, management and maintenance. A new home can still have repair or defect issues.

Cash buffer

Plan for a delayed first let, tenant changes, arrears and unexpected costs. The amount you need is personal to the property and your finances; do not rely on uninterrupted rent to cover every payment.

For wider investment questions, see what to consider before purchasing a buy-to-let property. Mortgage advice does not replace advice from a solicitor or tax adviser.

From reservation to the first tenant

Plan for an off-plan completion date to move

Discuss the plot

Share the price, deposit, estimated rent, property type, developer incentive and expected completion window. An early agreement in principle is not a mortgage offer.

Apply and check the offer

A lender assesses the proposed rent, property and applicants. Check the written offer’s conditions and expiry date with your adviser and solicitor before exchange.

Track changes

Tell your adviser if the build is delayed, an incentive changes or your finances change. Do not assume an offer will be extended or that the original product remains available.

Prepare to let

Your solicitor coordinates completion. Check the property is ready, the insurance and letting arrangements are appropriate, and the lender’s conditions are met.

If the mortgage offer expires before completion, the lender may consider an extension, request updated information or require a new application. The developer’s contract is a separate legal matter: ask your solicitor what a delay means for your deposit and commitments.

Advice matched to the plan

What Count Ready can help you work through

We can discuss the proposed property, likely rent, purchase timetable, deposit, existing mortgages and your intended ownership. An adviser can explain mortgage routes it is able to consider, the evidence a lender may ask for and the key conditions to check. The lender decides whether to offer a mortgage, and no adviser can remove the need for appropriate property and income checks.

Buying through a companyOwnership and lending considerations for a limited company Planning short staysHoliday letting is a different use to a standard tenancy Already own the propertyExplore the separate buy-to-let remortgage route

If another lender declined the case, tell us the reason it gave before making another application. A decline can relate to the property, rent, credit, finances or construction timetable. We can review possible next steps without promising a different decision.

There is no fee for our initial evaluation. We explain our service and agree any applicable fees before chargeable work begins. Our Terms of Business set out the published payment and refund terms.

Straight answers

New-build buy-to-let questions

Can I get a buy-to-let mortgage on a new-build or off-plan property?

Possibly. Acceptance depends on the lender’s current policy, the property and build stage, expected rent, applicants and purchase terms. Check those details before relying on a reservation deadline or exchanging contracts.

How is rent checked before there is a tenant?

A lender may use its valuer’s assessment of achievable rent rather than only an agent’s estimate or the rent you hope to charge. Its rental coverage method and any personal-income checks depend on its policy. An adviser can assess the current options for your case.

How much deposit do I need for a new-build buy-to-let?

There is no single figure for every case. The lender’s loan-to-value limit, house or flat policy, valuation, incentives and your circumstances all matter. Include fees, tax and a cash buffer in your budget as well as the deposit.

Can a developer contribution form part of my deposit?

It depends on the lender and the exact incentive. Give your adviser and solicitor the full written offer, including any cashback, upgrades or paid costs. The lender must know what the developer is contributing and may adjust its assessment.

What if the build is delayed after I get a mortgage offer?

Tell your adviser and solicitor promptly. The lender might consider extending the offer, ask for new evidence or require a new application; an extension is not guaranteed. Your solicitor should explain the contract’s deadlines and your obligations.

Can I buy the new-build rental property through a limited company?

Some lenders consider company buy-to-let applications, subject to their current criteria and the company’s structure. The mortgage and tax implications differ from buying personally. Read our limited company buy-to-let guide and obtain independent tax advice before deciding how to buy.