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Consent to Let

Written permission from a residential mortgage lender for the owner to let out a home bought with an owner-occupier mortgage, without switching to a buy-to-let mortgage. It is often time-limited and can come with a higher interest rate or a fee. Letting without it usually breaches the mortgage terms.

Reviewed by Erdem VolkanLast reviewed 16 September 2026How we check facts

What
Lender permission to let a home on a residential mortgage
Terms
Often time-limited, sometimes a higher rate
Without it
A breach of the mortgage terms
Common for
Accidental landlords, job moves

Why it matters

What Consent to Let means for a landlord

Most "accidental landlords", people who moved, kept the old home and let it, are on a residential mortgage that quietly forbids letting, and the cheap fix is a Consent to Let rather than an expensive remortgage. The risk of skipping it is not theoretical: an undisclosed let can invalidate buildings insurance at the exact moment of a claim, and a lender that discovers it can load the rate or call in the loan. Get the consent in writing, diarise its expiry, and move to a proper buy-to-let product before it lapses.

Worked example

How it plays out

Sara relocates for work and wants to let her Manchester flat, which has a residential mortgage. She asks her lender for consent to let, which it grants for 12 months with a small rate increase. She tells her insurer the flat is let and moves to a landlord policy. Before the consent ends, she decides whether to remortgage to buy-to-let or sell.
An illustrative example. Names, places and figures are made up.

Common mistakes

Where landlords go wrong

  1. 01Letting without asking the lender.
  2. 02Not telling the insurer the property is let.
  3. 03Letting the consent expire unnoticed.

What to do

A short checklist

  • Ask your lender for consent before letting.
  • Move to landlord insurance.
  • Diary the date the consent ends.