Consent to Let: What You Need from Your Mortgage Lender Before Renting Out

Letting on a Residential Mortgage Without Consent Is a Breach of Contract

A standard residential mortgage contract includes an occupancy clause requiring you to live in the property as your primary residence. The moment you move a tenant in without the lender's written permission, you are in technical breach. The lender can demand immediate repayment of the full outstanding loan, refuse future borrowing, or report the breach to credit reference agencies.

In practice, most lenders will not immediately recall the loan — but they can, and the breach sits on your file. The fix is straightforward: get consent to let before you advertise.

What Consent to Let Actually Is

Consent to let is a temporary permission from your residential mortgage lender allowing you to let the property to a third party while keeping the existing mortgage in place. It is not a new mortgage product — it is a contractual variation.

Lenders typically grant consent for a fixed period, usually 12 months at a time, renewable on application. Common conditions include:

• Rate surcharge — many lenders add 0.5% to 1.5% to your existing interest rate for the consent period
• Administration fee — a one-off fee of £50 to £250
• Tenancy restrictions — some lenders require the tenancy to be an Assured Periodic Tenancy (the only type available in England since 1 May 2026), prohibit lettings to certain tenant categories, or cap the tenancy at a maximum duration
• Insurance requirement — the lender will require landlord buildings insurance in place before granting consent

Not every lender offers consent to let. Some will only approve a full product transfer to a Buy-to-Let mortgage, which involves a new application, a property valuation, and typically a higher interest rate permanently. Others — particularly smaller building societies — may refuse outright and require you to remortgage with a different lender.

How to Apply

1. Contact your lender's existing customer team (not the new business line) and ask whether they offer consent to let on your current product
2. Provide the details they request — usually the property address, the proposed monthly rent, and whether you will self-manage or use a letting agent
3. Receive the written consent letter specifying any conditions, the consent period, and any rate or fee changes
4. Keep the letter on file — it forms part of your pre-tenancy compliance evidence

Allow two to six weeks for the process. Some lenders handle it in days; others require internal underwriting review, particularly if you have a low loan-to-value ratio or a discounted product.

Leasehold Properties: Freeholder and Management Company Consent

If the property is leasehold — most flats in England — you have a second layer of consent to obtain. The headlease will contain covenants about subletting. Three common scenarios:

Absolute prohibition — the lease says you cannot sublet at all. You would need to apply to the freeholder for a formal licence to sublet, which they may or may not grant. Some leases include a clause stating consent shall not be unreasonably withheld.

Qualified restriction — the lease requires prior written consent from the freeholder or management company before subletting. You apply, pay any administration fee (typically £100 to £500), and receive a formal licence to sublet.

No restriction — rarer, but some leases contain no subletting covenant at all. You can let freely, though it is good practice to notify the freeholder or managing agent regardless.

Check the lease yourself or ask a solicitor to review it. The freeholder's consent is entirely separate from your mortgage lender's consent to let — you need both.

What Happens If You Let Without Either Consent

Without mortgage consent: breach of contract, potential loan recall, void insurance (if the policy requires lender consent as a precondition), and a damaged relationship with your lender.

Without freeholder consent: breach of lease covenant, potential forfeiture proceedings (the freeholder's nuclear option), and liability for the freeholder's legal costs in enforcing the covenant.

Neither outcome is theoretical. Mortgage lenders routinely check council tax records and electoral rolls during product reviews, and freeholder managing agents receive tenant complaints that reveal an unauthorised sublet.

Consent to Let vs. Buy-to-Let Mortgage

Consent to let is the right route when:

• You plan to let temporarily (12 to 24 months) while relocating, travelling, or deciding whether to sell
• Your current mortgage rate is competitive and you want to avoid early repayment charges on a full remortgage
• The property was your primary residence and you are transitioning to landlord status

A Buy-to-Let remortgage makes more sense when:

• You intend to let long-term (3+ years)
• The consent to let surcharge exceeds the BTL rate
• Your lender does not offer consent to let

The Broader Compliance Sequence

Consent to let is the first step in a longer pre-tenancy checklist. Once you have mortgage and (if applicable) freeholder permission in place, you move on to local authority licensing checks, safety certificates, tenancy terms, deposit protection, and HMRC registration.

For the full sequenced compliance walkthrough, see the Becoming a Landlord in England guide.

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