Buy-to-Let Mortgage with Sitting Tenant: A Guide - Fees Free Buy To Let Mortgage Adviser

Acquiring a buy-to-let mortgage with a sitting tenant is the process of financing a property purchase where a tenant already resides. This means as the new landlord, you inherit both the property and the existing tenancy agreement, providing immediate rental income from day one.

Buying a rental property with a tenant in situ can be a savvy investment strategy. It eliminates the initial void period, saving you time and money on advertising and referencing new tenants. However, it also presents a unique set of challenges that both you and your mortgage lender will need to navigate carefully. The lender’s main concern is the security of their loan, which is directly tied to the reliability of the rental income stream.

Key takeaways

A mortgage with a sitting tenant is for buying a property that’s already occupied.
The tenancy agreement is the most critical document for lenders.
Lenders will assess the rental income against strict affordability tests.
You gain immediate rental income but inherit the existing tenant and tenancy terms.
Using a specialist mortgage broker is highly recommended for these complex cases.

What is a Buy-to-Let Mortgage with a Sitting Tenant?

A buy-to-let mortgage with a sitting tenant is a specialised loan for purchasing an investment property that is already occupied. Unlike a standard buy-to-let mortgage on a vacant property, the lender must assess the risk associated with an existing, inherited tenancy. The term “sitting tenant” or “tenant in situ” simply refers to the individual(s) already living in the property under a formal tenancy agreement when it is sold.

This situation is common when an existing landlord decides to sell one of their rental properties to another investor. From a lender’s perspective, this isn’t a standard purchase. They aren’t just financing a property; they are financing a property with a pre-existing contractual arrangement in place. Their entire focus will be on the quality and terms of that arrangement to ensure the rent is sufficient and sustainable.

How Does the Tenancy Agreement Affect the Mortgage?

The tenancy agreement is the single most important document when seeking a buy-to-let mortgage with a sitting tenant. Lenders will scrutinise this legal contract to understand the terms you will inherit. A formal, correctly drafted Assured Shorthold Tenancy (AST) agreement is almost always a minimum requirement.

The lender will analyse the AST for several key details: the names of the tenants, the monthly rent amount, the date the tenancy began, and the duration of the fixed term. They need to be confident that the rent covers the mortgage payments by a certain margin, typically checked via an Interest Coverage Ratio (ICR) stress test. If the rent is significantly below the current market rate, it can make the deal much harder to finance.

Tenancy Factor	Lender’s View	Impact on Mortgage Application
Tenancy Type	Prefers modern Assured Shorthold Tenancy (AST)	High Success Chance
	Dislikes old “Regulated” tenancies (pre-1989)	Very Difficult / Specialist Lenders Only
Rental Amount	Must meet or exceed ICR stress test levels	High Success Chance
	Below market value / Fails stress test	Low Success Chance
Agreement Status	In a fixed term or a formal periodic tenancy	Generally Acceptable
	Informal or verbal agreement	Almost always rejected
Tenant History	Clean payment record, no arrears	Positive Factor
	History of late payments or disputes	Negative Factor / Likely Rejected

How Do Lenders Assess These Applications?

Lenders assess applications for properties with sitting tenants by focusing heavily on risk mitigation. Their primary concern is that the rental income will consistently cover the mortgage interest payments, with a healthy buffer. This involves a more detailed underwriting process than a standard buy-to-let application.

Key assessment factors include:

Rental Income: The lender will use the rental figure stated in the existing AST to perform a stress test. They typically require the rent to be at least 125% to 145% of the mortgage payment, calculated at a higher “stressed” interest rate.
The Tenancy Agreement: As detailed above, it must be a valid, legally sound AST. Any unusual clauses or terms will be a red flag.
Property Valuation: The surveyor will not only provide a standard valuation but will also be asked to comment on the property as a rental investment, confirming the current rent and the market rent for the area.
Applicant Status: Experience matters. Lenders are often more comfortable lending to existing landlords who can demonstrate a successful track record of managing rental properties.

Pros and Cons of Buying a Property with Tenants

Buying a tenanted property is an attractive proposition for many investors but comes with its own set of risks and rewards that must be carefully weighed.

Pros:

Immediate Rental Income: You start earning a return on your investment from the day of completion. There’s no need to find a tenant.
No Void Period: The property is already generating income, so you don’t lose money while it sits empty.
Reduced Initial Costs: You save on letting agent fees, advertising costs, and inventory checks associated with finding a new tenant.
Proven Tenant: The tenant has a track record in the property, which can provide some reassurance about their reliability (subject to due diligence).

Cons:

Inheriting Problems: You also inherit any existing issues, such as a tenant who pays late, causes damage, or has a poor relationship with neighbours.
Below-Market Rent: The rent may be set at a level below the current market rate, and you can only increase it at specific times and by following strict legal procedures.
Less Flexibility: You cannot renovate, refurbish, or sell the property with vacant possession without first legally ending the tenancy.
Mortgage Complexity: Fewer lenders operate in this space, making finding a suitable mortgage more challenging. Working with a specialist buy-to-let mortgage broker can prove invaluable.

The Application Process Explained

The application process for a buy-to-let mortgage with a sitting tenant requires extra due diligence from the buyer.

Initial Due Diligence: Before making an offer, get a copy of the tenancy agreement and the tenant’s payment history from the seller. If they are unwilling to provide this, it is a major red flag.
Consult a Broker: Engage with a mortgage broker who specialises in these types of transactions. They will know which lenders have a positive appetite for tenanted properties.
Formal Mortgage Application: Your broker will help you package your application, submitting the property details, your personal information, and, crucially, a copy of the AST.
Valuation: The lender instructs a surveyor to visit the property. They will assess its physical condition and also its viability as a rental investment with the current tenant in place.
Underwriting and Offer: The lender’s underwriting team reviews all the documents, including the valuation report and AST. If everything meets their criteria, they will issue a formal mortgage offer.
Legal Process: Your solicitor handles the conveyancing. They will also review the tenancy agreement to ensure it is legally robust and advise you of your obligations as the new landlord.

Understanding a Sitting Tenant’s Rights

A sitting tenant’s rights are legally protected, and as the new landlord, you are bound to respect them fully. When you buy the property, the existing tenancy agreement continues on the same terms as before; you simply step into the shoes of the previous landlord.

The tenant’s primary right is to “quiet enjoyment” of their home, meaning you cannot harass them or interfere with their residence. You must also adhere to all landlord responsibilities, such as property maintenance and safety checks. If you wish to increase the rent or end the tenancy, you must follow the precise legal procedures and notice periods outlined in the Housing Act and the AST itself. For certain complex properties, you may need to understand regulations for a HMO Buy to Let Mortgage.

Remortgaging with a Sitting Tenant

Remortgaging a property with a sitting tenant is generally more straightforward than a purchase. You already have a relationship with the tenant, and a proven history of rental payments. Most buy-to-let lenders are comfortable with “like-for-like” remortgages where a tenant is in place.

The process is similar to a standard remortgage. A new lender will still want to see a copy of the AST and will conduct a valuation. They will run their affordability stress tests based on the current rent. As long as the rent is sufficient to meet the new lender’s criteria and the tenancy is in good standing, the process is usually smooth. If you are considering your options, a specialist can help you compare deals, such as those from The Mortgage Works.

Frequently Asked Questions

Can I use a normal mortgage to buy a house with tenants?

No, you cannot use a standard residential mortgage. You must have a buy-to-let mortgage, as the property will be used as an investment to generate rental income, not as your personal residence. Lenders have different criteria for investment properties.

Is it harder to get a mortgage with a sitting tenant?

Yes, it can be more challenging. Fewer lenders offer this type of mortgage, and their criteria are stricter. They will place significant emphasis on the existing tenancy agreement and the rental income being sufficient to pass affordability stress tests.

What happens to the tenancy deposit?

The deposit must be legally transferred from the seller’s government-approved deposit protection scheme to your own. Your solicitor should ensure this is handled correctly as a condition of the sale, and you must re-serve the prescribed information to the tenant.

Can I evict a sitting tenant after I buy the property?

You cannot simply evict them. You must follow the legal process for ending an Assured Shorthold Tenancy, which typically involves issuing a Section 21 or Section 8 notice and potentially seeking a court order if the tenant does not leave.

What if the tenant’s rent is below market value?

This can make a mortgage difficult to obtain, as the loan may fail the lender’s affordability stress test. You may need a larger deposit to reduce the loan amount, or you will have to wait until you can legally increase the rent.

Do I need a special type of solicitor?

While not mandatory, it’s wise to use a solicitor with experience in conveyancing for tenanted properties. They will be better equipped to review the tenancy agreement and manage the transfer of the tenancy deposit and legal responsibilities.