IMPORTANT: YOUR HOME MAY BE REPOSSESSED IF YOU DO NOT KEEP UP REPAYMENTS ON YOUR MORTGAGE.
Yes, most residential mortgage lenders will grant a consent to let if your circumstances are genuinely temporary and your account is in good standing. The single most important action is to contact your lender and obtain written permission before you market the property or sign a tenancy agreement. A consent to let is temporary and entirely at your lender's discretion. Letting without it breaches your mortgage contract and can trigger serious consequences, up to and including a demand for full repayment.
Before you call your lender, run through this immediate checklist:
- Notify your lender in writing and request formal consent before any tenancy begins.
- Check that your buildings insurance policy covers a let property, or arrange landlord insurance.
- Obtain written confirmation of consent and keep it on file throughout the tenancy.
Key takeaways
A consent to let is a temporary, discretionary permission from your lender — obtaining it in writing before any tenancy begins is the single most important step a homeowner can take.
| Point | Details |
|---|---|
| Get written consent first | Contact your lender and obtain written permission before marketing the property or signing any tenancy agreement. |
| Typical costs | Administration fees commonly range from £50–£150; many lenders also apply a rate loading of around 0.5% while consent is active. |
| Duration limits | Consent periods typically run for 6–24 months; repeated renewals may trigger a requirement to remortgage to a buy-to-let product. |
| Landlord duties remain yours | Deposit protection, gas and electrical safety checks, and right-to-rent checks are your legal responsibility regardless of lender permission. |
| Haven Mark Advisers | Provides dedicated, regulated advice for homeowners with complex income or tight timelines, including consent applications and buy-to-let remortgage transitions. |
Table of Contents
- What is a consent to let mortgage?
- When do you need consent to let?
- Are you eligible? A checklist to use before you apply
- How much does consent to let cost?
- How to apply for consent to let: step by step
- How long does consent to let last?
- Your legal obligations as a landlord
- What happens if you let without consent?
- How likely are you to get consent, and how to improve your chances?
- An adviser's perspective on consent to let
- How Haven Mark Advisers supports consent to let applications
- Sources
What is a consent to let mortgage?
A consent to let is not a mortgage product. It is a formal, temporary agreement attached to your existing residential mortgage that permits you to rent out your home without switching to a buy-to-let product. As Manson Solicitors explain, lenders treat it as an exception to the owner-occupier terms of your loan, not a right, and most expect any permanent letting arrangement to be moved onto a dedicated buy-to-let mortgage.
The distinction from a buy-to-let mortgage matters practically, not just technically.
| Feature | Consent to let | Buy-to-let mortgage |
|---|---|---|
| Product type | Permission on existing residential loan | Separate mortgage product |
| Duration | Temporary (typically 6–24 months) | Long-term or indefinite |
| Interest rate | Residential rate, often with a small loading | Dedicated buy-to-let rate |
| Purpose | Short-term or circumstantial letting | Deliberate investment letting |
| Lender discretion | Yes, fully discretionary | Subject to standard underwriting |
The key practical point: your monthly payment structure, your lender, and your mortgage terms all stay the same while consent is active. What changes is the lender's formal acknowledgement that someone other than you is living in the property.
When do you need consent to let?
Any time you intend to rent your home while a residential mortgage is secured against it, you need your lender's written permission. Uswitch's mortgage guidance confirms that consent to let is an agreement on an existing residential mortgage, and that letting without it puts you in breach of contract regardless of how short the tenancy is.
Common circumstances lenders accept as valid reasons include:
- A temporary work relocation or overseas secondment (typically 6–18 months).
- Difficulty selling the property in a slow market, where renting bridges a gap.
- Moving in with a partner or family member while retaining the property.
- A period of care responsibilities requiring you to live elsewhere.
- A short posting abroad where you intend to return to the property.
The shorter and more clearly temporary the reason, the more straightforwardly lenders tend to view the application. A six-month secondment with an employer's letter is a clean case. A situation where you have already bought a second home and have no stated plan to return is far less likely to be approved on consent terms alone.
Lodgers and short-stay platforms sit in a different category. Taking in a single lodger under a licence agreement is generally treated differently from a full tenancy, and some lenders permit it without formal consent. Platforms such as Airbnb, however, are a grey area: most residential mortgage terms prohibit short-term commercial letting, and lenders may treat this as a breach even if you remain in the property. Check your mortgage deed and contact your lender before listing on any short-stay platform.
Pro Tip: If your reason for letting is a work secondment, ask your employer for a letter on headed paper confirming the start date, expected duration, and your intention to return. This single document can materially shorten the lender's decision time.
Are you eligible? A checklist to use before you apply
Lenders apply their own criteria, but several requirements appear consistently across the market. Use this list to self-assess before you make contact.
Common lender requirements
- Your mortgage must have been in place for a minimum period, commonly 6–12 months from completion. Manson Solicitors note this is a standard safeguard against residential mortgages being used as a backdoor route into buy-to-let. Virgin Money's guidance notes, for example, state that the mortgage must not have completed within the last six months.
- Your account must be free of recent arrears. Most lenders will decline if there are missed payments in the preceding 12 months.
- The loan-to-value ratio must sit within the lender's acceptable range. Higher LTV positions reduce the likelihood of approval.
- The tenancy must be a single-household arrangement. Letting to multiple unrelated sharers may create an HMO, which requires specialist finance and separate licensing.
- The property must be your primary residence at the time of application, or you must be able to demonstrate a clear intention to return.
Documents to prepare before you call
- Photo ID (passport or driving licence).
- Your mortgage account number and most recent statement.
- A draft or proposed tenancy agreement showing the proposed term and rent.
- Documentary proof of your reason for letting (employer letter, secondment confirmation, evidence of a new property purchase).
- Confirmation of your current or proposed landlord insurance.
Pro Tip: Draft the tenancy agreement before you apply, even if it is not yet signed. Lenders want to see the proposed rent, the tenancy type (assured shorthold tenancy), and the proposed start date. Having this ready avoids a second round of correspondence.
How much does consent to let cost?
The financial impact of consent to let has two components: an administration fee and, in many cases, a modest interest-rate loading while the consent is active.
Administration fees across the market typically fall in the range of £50–£150 for a one-year consent period. NatWest charges £120; Virgin Money's guidance notes state a fee of £125 for one year. Some lenders charge an annual renewal fee if the consent is extended, so a two-year arrangement can cost £240–£300 in fees alone.
The interest-rate loading is the more significant ongoing cost. Many lenders add approximately 0.5% to the mortgage rate while consent is active. On a typical loan balance, this loading adds a notable increment to your monthly interest cost, which should be factored into your rental income calculations. It is not a large sum in isolation, but it is worth factoring into your rental income calculation before you commit to a tenancy.
While consent is active, Nationwide's guidance notes that certain mortgage options may be frozen, including product transfers and further advances. If you were planning a rate switch or additional borrowing in the near term, factor this restriction into your timing.
Operational restrictions in summary:
- No product switch (rate change) while consent is active with some lenders.
- Further advances or additional borrowing may be prohibited.
- Remortgaging to another lender may require the consent to be discharged first.
How to apply for consent to let: step by step
The application process is straightforward when you have the right documents ready. NatWest's consent to let guidance sets out a clear procedural route that is broadly representative of how most high-street lenders handle these requests.
- Read your mortgage deed. Confirm the exact wording of the owner-occupier clause and any provisions for temporary letting. This tells you what you are asking for permission to deviate from.
- Contact your lender's mortgage servicing or existing-customer team. Do not use the general customer service line if a dedicated mortgage team exists. Ask specifically for the consent to let or change-of-use team.
- Request the application form. Most lenders have a specific consent to let form. Ask for it in writing (email or post) so you have a record of the request date.
- Complete and return the form with supporting documents. All mortgage account holders must sign. Include your draft tenancy agreement, proof of reason, photo ID, and insurance confirmation.
- Pay the administration fee. This is usually collected at the point of application or on approval.
- Obtain written confirmation before the tenancy begins. Do not allow a tenant to move in until you hold the lender's written consent. Keep this document with your tenancy records.
When you call, ask the lender for a clear timescale for their decision. Most lenders aim to respond within 5–10 working days, but complex cases can take longer. If you have a proposed tenancy start date, state it clearly so the lender can prioritise accordingly.
Pro Tip: Ask the lender to confirm in writing not just that consent is granted, but the exact duration, any conditions attached, and the renewal process. Verbal confirmation is not sufficient — you need a document you can show a letting agent, insurer, or solicitor.
How long does consent to let last?
Consent periods commonly run for 6–24 months, as Uswitch's guide confirms. Some lenders grant a fixed 12-month period with the option to renew; others set a maximum of two years before requiring a formal review of the arrangement.
Renewal is not automatic. You must apply again, pay any renewal fee, and demonstrate that the temporary circumstances still apply. A lender that has granted consent twice may begin to question whether the arrangement is genuinely temporary.
When lenders require a switch to buy-to-let:
- The letting has become permanent or open-ended with no stated return date.
- Consent has been renewed multiple times without a clear exit plan.
- The lender's own policy limits consent to a maximum period (some cap at 12 months).
- The property is no longer your primary residence and you have no intention to return.
When that point arrives, a buy-to-let remortgage is the appropriate route. The underwriting criteria differ from a residential mortgage: lenders assess rental income coverage, the property's rental yield, and your wider portfolio if you own other properties.
Start the remortgage conversation at least three months before your consent period expires. Leaving it until the final weeks creates a gap in permission and puts you in breach of your residential mortgage terms while the new product is arranged.
Your legal obligations as a landlord
Lender permission does not replace your legal duties as a landlord. These obligations exist under statute and apply from the moment a tenancy begins, regardless of what your mortgage lender has or has not approved. Gov sets out the full framework.
Core legal requirements in England:
- Deposit protection: Any deposit must be placed in a government-authorised scheme (such as the Deposit Protection Service, MyDeposits, or the Tenancy Deposit Scheme) within 30 days of receipt. Failure to do so exposes you to a penalty of up to three times the deposit amount.
- Gas safety: A Gas Safety Certificate (CP12) must be obtained annually from a Gas Safe registered engineer and provided to tenants before they move in.
- Electrical safety: An Electrical Installation Condition Report (EICR) is required at least every five years, and a copy must be given to tenants before the tenancy starts.
- Energy Performance Certificate: An EPC rated E or above is required before you can legally let the property.
- Right-to-rent checks: You must verify that all adult occupants have the legal right to rent in England before the tenancy begins.
- Rental income tax: GOV.UK's guidance on rental income tax explains how to calculate taxable rental profit and what allowable expenses you can deduct. Rental income must be declared to HMRC.
HMO licensing is a separate matter entirely. If your property is occupied by three or more people from more than one household, it may meet the definition of a House in Multiple Occupation. Consent to let does not cover HMO licensing, and operating an unlicensed HMO carries criminal penalties. Check with your local authority before agreeing to any multi-household tenancy.
What happens if you let without consent?
Letting your property without written lender permission is a breach of your mortgage contract. The consequences are serious and can compound quickly.
Immediate contractual risks:
- The lender may demand full repayment of the outstanding mortgage balance.
- The account may be placed in default, damaging your credit record.
- Under the Law of Property Act, lenders have the power in certain circumstances to appoint a receiver or pursue possession where mortgage terms have been breached.
- Your buildings insurance is likely to be invalidated, leaving you personally liable for any damage or liability claims during the tenancy.
Longer-term operational consequences:
- Future remortgage applications become harder if a breach is recorded.
- Some lenders will not offer consent retrospectively, meaning you may be forced onto a buy-to-let product immediately, often at a higher rate.
- Letting agents and solicitors may identify the breach during conveyancing if you later sell.
If you are already letting without consent, stop marketing the property to new tenants and contact your lender immediately. Voluntary disclosure is treated more favourably than discovery. Expect retrospective fees, a possible rate adjustment, and a requirement to formalise the arrangement. Seek regulated mortgage advice before you call, so you understand your options and can present the situation clearly.
Pro Tip: If you have already let without consent, do not wait for the lender to find out. Proactive disclosure gives you control of the conversation and is almost always treated more leniently than a lender-initiated discovery.
How likely are you to get consent, and how to improve your chances?
Lenders treat consent to let as a discretionary exception, not an entitlement. Approval is more likely when the application is well-evidenced and the borrower's profile is clean. NatWest's guidance emphasises that clear documentary evidence of the temporary reason materially supports the application.
What lenders actually assess
- Payment history. A clean account with no arrears in the preceding 12 months is the single strongest positive factor.
- Equity and LTV. More equity reduces the lender's risk. Applications at high LTV (above 85–90%) are more likely to be declined or referred for manual review.
- Reason for letting. A clearly temporary, documented reason (secondment, difficulty selling, family care) is more persuasive than a vague or open-ended explanation.
- Tenancy type. Single-household assured shorthold tenancies are the standard. Anything that could be classified as an HMO, or a commercial short-stay arrangement, is likely to be declined.
- Rental income coverage. Some lenders informally check that the proposed rent covers a reasonable proportion of the mortgage payment, even though consent to let is not underwritten like a buy-to-let product.
Practical levers to strengthen your application
- Reduce your outstanding balance before applying if your LTV is borderline.
- Obtain a signed or draft tenancy agreement from a reputable letting agent.
- Provide a letter from your employer, solicitor, or doctor that corroborates the temporary nature of your circumstances.
- Confirm landlord insurance that covers accidental damage and public liability.
- If your income is complex (self-employed, contractor, or director), prepare two years of accounts or tax calculations in advance. Lenders occasionally ask for affordability confirmation even on consent applications.
Professionals with non-standard income, foreign nationals, or those with complex employment structures sometimes find that a lender's standard consent process does not accommodate their documentation easily. In those cases, working with a dedicated adviser who handles complex income situations can make the difference between a swift approval and a prolonged back-and-forth with the lender.
An adviser's perspective on consent to let
Most homeowners who contact Haven Mark Advisers about consent to let have already been surprised by something: either the lender's fee, the rate loading they were not expecting, or the discovery that their LTV puts them outside the lender's standard criteria. The process looks simple from the outside, and for straightforward cases it often is. But the cases that cause real difficulty are the ones where the borrower's income is complex, the LTV is tight, or the reason for letting is not immediately legible to a lender's standard form.
What actually matters in these situations is not just knowing the rules, but knowing how to present the case. A secondment letter that does not specify a return date, for example, can stall an application that should be routine. A self-employed borrower who cannot quickly produce the right income evidence may find the lender's consent team unable to proceed. These are not insurmountable problems, but they require someone who understands both the lender's internal process and the borrower's specific circumstances.
The other thing worth saying plainly: consent to let is only one half of the decision. The landlord obligations that attach the moment a tenancy begins are the other half, and lenders do not police them. Deposit protection, gas safety, right-to-rent checks — these are the borrower's responsibility entirely, and the penalties for getting them wrong are separate from, and in addition to, any mortgage consequences.
How Haven Mark Advisers supports consent to let applications
For homeowners navigating a consent to let application alongside complex income, a tight timeline, or an upcoming remortgage decision, Haven Mark Advisers provides fee-based, regulated mortgage advice with a single dedicated adviser managing the case from start to finish.
Where a standard consent application is straightforward, the firm's value is in the cases that are not: professionals with variable or director income, foreign nationals with residency documentation to manage, or borrowers whose LTV sits at the boundary of a lender's criteria. Haven Mark Advisers has access to a broad range of UK lenders and can identify which are most likely to approve consent given the specific circumstances, rather than leaving the borrower to work through a lender's standard process without guidance.
If your consent period is approaching its limit and a buy-to-let remortgage is the logical next step, the firm can manage that transition as well, with the same adviser handling both conversations.
To discuss your situation, visit Haven Mark Advisers' residential mortgage page or use the online contact form to book an initial conversation. A fee is payable on completion of a purchase or remortgage arranged through the firm; the firm may also receive commission from lenders.
Sources
The following official and lender pages are the primary references to consult when preparing a consent to let application. They are for factual grounding; seek regulated advice before making individual decisions.
Official GOV.UK guidance:
- Consent to let — Uswitch guide
- Consent to letting application guidance notes — Virgin Money (PDF)
- Gov
- Consent to let: when you can rent your home — Manson Solicitors (blog)
Lender consent to let pages:
Independent guidance:
Always check your own mortgage deed for the specific owner-occupier clause and retain the lender's written consent throughout the tenancy. These sources reflect general market practice; your lender's current criteria may differ.
Haven Mark Advisers is a trading name of a regulated mortgage adviser. Your home may be repossessed if you do not keep up repayments on your mortgage. Think carefully before securing other debts against your home. This article is general information only and does not constitute regulated mortgage advice. Confirm current rules with your lender or a qualified mortgage adviser before making any decision.
This article is general information, not a substitute for advice from a qualified financial advisor. Consult a qualified financial professional about your own circumstances before acting on anything here.