Can I Rent Out My House on a Residential Mortgage? Consent to Let Explained

Life does not always follow the plan you had when you bought your home. A new job in another city, moving in with a partner, working abroad for a couple of years, or a property that will not sell in the current market. Whatever the reason, a lot of homeowners find themselves asking the same question: can I rent my house out while it is still on a residential mortgage?

The short answer is not without your lender's permission. The longer answer involves something called consent to let, and it is one of the most common questions we get asked at Drummonds Finance Group, usually by people who never expected to become landlords at all.

Why you cannot just start letting

A residential mortgage is priced and underwritten on the basis that you live in the property. Letting it out changes the lender's risk, so every residential mortgage contract includes a condition that you occupy the home yourself. Renting it out without telling your lender is a breach of your mortgage conditions.

People sometimes assume this is a technicality that nobody checks. It is not. Lenders find out through tenant deposit protection schemes, electoral roll data, credit files showing you living elsewhere, insurance claims and even letting adverts. If they do find out, the consequences range from a forced switch onto a more expensive rate, to a demand for full repayment of the loan. It can also invalidate your buildings insurance, which is a serious problem if something goes wrong mid-tenancy. It is simply not worth the risk when the legitimate route is usually straightforward.

What consent to let actually is

Consent to let is your lender's formal, usually temporary, permission to let the property while keeping your existing residential mortgage. You stay on your current rate and terms, and the lender notes the property as let.

Each lender handles it differently, but the common pattern looks like this. You apply directly to your lender; they check your account conduct and the reason for the request, and if approved, they grant consent for a fixed period, often six to twenty-four months. Some charge a one-off administration fee, some add a small percentage to your interest rate for the consent period, and some charge nothing at all if you are partway through a fixed deal. Many will expect you to have held the mortgage for a minimum period first, and consent is generally intended for people whose circumstances have changed, not for those who bought intending to let from day one. Anyone planning a rental purchase deliberately should be looking at a proper buy-to-let mortgage from the outset, and if it is your first, our guide to getting a buy-to-let with no landlord experience explains how lenders view newcomers.

Consent to let versus a buy-to-let remortgage

Consent to let suits temporary situations. If you are relocating for a two-year contract and plan to move back in, it is usually the cleanest option. But if the letting arrangement is going to be long term, or your lender refuses consent, or the consent period is expiring, the proper solution is to remortgage onto a buy-to-let product.

Buy-to-let lending is assessed differently. Instead of your income being the main driver, lenders look primarily at the expected rental income, which typically needs to cover the mortgage payment by a healthy margin at a stressed interest rate. Your own income still matters, and some lenders require a minimum, but the property has to earn its keep on paper. If you became a landlord by circumstance rather than design, sometimes called an accidental landlord, you may fall under consumer buy-to-let rules, which give you additional regulatory protection. This is a corner of the market where lender criteria vary enormously, and it is exactly the kind of case where a whole-of-market broker earns their keep.

Longer term, landlords who decide to build on that first accidental rental often face the question of ownership structure, and our comparison of limited company versus personal name buy-to-let walks through how the tax and mortgage sides interact.

Let-to-buy: letting your home to fund the next one

There is a specific version of this situation that deserves its own mention. If you want to keep your current home as a rental and buy a new home to live in, the arrangement is known as let-to-buy. It typically involves two simultaneous mortgages: a buy-to-let remortgage on your existing property, often releasing some equity to fund your onward deposit, and a new residential mortgage on the home you are moving to. The two applications have to be coordinated so each lender is comfortable with the other, and affordability on the new purchase depends on the rental property washing its own face.

Let-to-buy can work brilliantly, but the numbers need honest scrutiny, and one cost in particular often decides it: the onward purchase counts as an additional property, so the stamp duty surcharge applies to the whole new purchase. On a typical family home, that can add tens of thousands to the bill, and our guide to stamp duty in 2026 sets out exactly how the surcharge is calculated, including when it can be reclaimed. We model both routes for clients, keeping the property or selling it, so the decision is made on real numbers rather than instinct.

What you take on as a landlord

Consent to let sorts out the mortgage, but it does not make the legal responsibilities of being a landlord go away. You will need to protect your tenant's deposit in a government-approved scheme, arrange annual gas safety checks, meet electrical safety and EPC requirements, and declare the rental income to HMRC. Your buildings insurance will need switching to a landlord policy. None of this is complicated, but skipping it creates far bigger problems than it solves, so build it into your plan from the start.

Frequently asked questions

How long does consent to let last? Typically six to twenty-four months depending on the lender, sometimes renewable. It is designed as a bridge, not a permanent arrangement.

Does consent to let cost anything? Often a modest administration fee, sometimes a small rate loading for the consent period, and with some lenders nothing at all. It varies enough to be worth checking before you assume.

Will consent to let affect my credit file? No. It is an agreement about how the property is used, not a change to the loan itself.

What if my lender says no? You still have options. A buy-to-let or let-to-buy remortgage to a different lender is usually available, and comparing that market is precisely what we do.

Can I get consent to let and then buy another home? Yes, and it is common, but the new purchase will be assessed alongside your existing commitment and will attract the additional property stamp duty surcharge, so plan the full cost early.

The sensible order to do things

Speak to your lender, or to us, before a tenant moves in, not after. If the situation is temporary, consent to let is usually quick to arrange. If it is permanent, we will compare a let-to-buy or buy-to-let remortgage across the whole market, including how it affects the affordability of your onward purchase, and you can sense-check the repayment side with our mortgage calculator. And if you have already let the property without consent, do not panic, but do get it regularised quickly. Lenders are considerably more sympathetic to people who approach them than to people they catch.

If you are thinking about letting your home, contact us or call 0330 1330034 and we will talk through which route fits your situation.