No, if you rent out your home without telling your mortgage lender, you’ll be breaking the terms of your mortgage contract.
This can lead to serious consequences, from financial penalties to repossession. But don’t panic, there are legal ways to let your property, even if you currently have a residential mortgage.
At J Property Management, we work with landlords across South London to make sure they stay compliant while protecting their investment. Here’s what you need to know.
Why You Have To Tell Your Mortgage Lender If You Rent Out Your Home
When you first take out a residential mortgage, the lender agrees to it on the basis that you will be living in the property. If you decide to rent it out, that changes the entire risk profile of the mortgage – which is why lenders don’t like it. This can be a big problem if they find out.
But not telling them is more than just an oversight, it’s actually a form of mortgage fraud. If your lender finds out (and they often do), they can:
- Demand that you repay the entire loan immediately.
- Charge you a higher interest rate, backdated to when the rental started.
- Charge you a penalty.
- In extreme cases, repossess the property.
To put it very simply: it’s really not worth the risk.
What Is Consent to Let?
Consent to let is designed to cover situations where a person is renting out their home for a short period of time. It’s a formal, written agreement that allows you to rent out your property temporarily, without changing the terms of your residential mortgage.
With permission, lenders might agree to you renting out your property if you are:
- Travelling for a few months
- Moving abroad for work
- Moving in with a partner or relative
- Wanting to sell your property in the near future.
Whilst it is a great option, it’s worth noting that Consent to Let is not permanent. It usually lasts 6 – 24 months, depending on your lender. After this, you’ll either need to renew the agreement or switch to a buy-to-let mortgage.
How Much Does Consent To Let Cost?
Consent to Let isn’t free. Most lenders charge:
- An admin fee (usually £75-£300).
- A higher interest rate for the length of the agreement.
You’ll also need to factor in other costs of becoming a landlord, like:
- Landlord insurance.
- Gas and electrical safety certificates.
- Deposit protection fees.
- Maintenance and repair costs.
- Potential letting agency management fees.
At J Property Management, we can help you calculate these costs and see if renting out your home makes financial sense. Get in touch with the team today!
When Do You Need A Buy-to-Let Mortgage?
If you decide that you want to rent your property out long-term, Consent to Let won’t be enough. In this case, you’ll need to switch to a buy-to-let mortgage.
Buy-to-let mortgages come with different rules:
- Rental income usually has to cover at least 125% of your mortgage payments.
- Interest rates are usually higher than residential mortgages.
- You may need a larger amount of equity in your property.
Switching to buy-to-let can feel like a lot, but it’s usually the right move for landlords looking to rent out their properties long-term.

Landlord Responsibilities You Can’t Ignore
Whether you let your home under Consent to Let or on a buy-to-let mortgage, you’ll be taking on all the legal responsibilities of a landlord. These include:
- Providing an Energy Performance Certificate (EPC).
- Protecting your tenant’s deposit in a government-approved scheme.
- Arranging annual gas safety certificates.
- Making sure electrical equipment is safe.
- Installing smoke and carbon monoxide alarms.
- Following fire safety regulations.
- Keeping the property safe and in good repair.
If this sounds like a lot, that’s because it is. Professional property management takes the stress away, making sure you stay compliant while your tenants are looked after.
Do I Need to Tell My Insurer If I Plan To Rent Out My Property?
Yes. Standard home insurance policies are designed to cover the people living in the home. If you rent out your home without updating your policy, you might not actually be covered if you make a claim.
Most lenders will tell you to switch to landlord insurance, which covers:
- Loss of rent.
- Tenant damage.
- Legal expenses for disputes.
- Third-party liability.
This is another area where J Property Management can guide you, making sure you’re properly covered.
Tax Considerations for Landlords
Any income from letting your property has to be declared to HMRC. You will have to pay Income Tax on your rental profits, though allowable expenses (like maintenance and letting fees) can be deducted.
If you’re renting a room in your home, you might be eligible for the Rent a Room Scheme, which lets you earn up to £7,500 a year tax-free.
We recommend speaking with a tax adviser to make sure you’re declaring everything correctly and making the most of available reliefs.
Always Get Consent Before Letting
To answer the question: you can’t rent out your house without telling your mortgage lender in the UK. It’s a breach of contract and can have really negative financial consequences.
The safer route is to either:
- Apply for Consent to Let if you’re only renting temporarily.
- Switch to a buy-to-let mortgage if you plan to rent long-term.
And remember, becoming a landlord comes with a lot of responsibilities, so staying on top of them is incredibly important.
At J Property Management, we’re here to help you manage the process, handle the day-to-day, and protect your investment.
Thinking about renting out your property? Get in touch with J Property Management today and let us take the stress out of being a landlord.


