Buy-to-Let Mortgages for Landlords and Property Investors
The buy-to-let market has grown increasingly complex, particularly for portfolio landlords and investors using limited companies or SPVs. At Adler Green, we specialise in sourcing competitive buy-to-let mortgages for landlords who need more than standard products.
Buy-to-Let and Investment Portfolio Solutions
Our expertise covers portfolio landlord mortgages, SPV buy-to-let mortgages, and limited company buy-to-let finance. Whether you’re expanding, refinancing, or restructuring your property investments, we ensure you access investment property mortgage products designed for professionals. We work with a broad range of over 190 lenders including high-street banks, challenger banks and private and specialist lenders to ensure that we can source the right finance to fit your requirements.
We support property investors across the UK, including in London, the South East, Midlands and major regional cities, as well as rural locations. We focus on delivering solutions that support long-term growth strategies, giving landlords clarity and confidence in their financing.
What Buy to Let Mortgages Are Available
Limited Company or SPV Buy to Let
For landlords purchasing or refinancing via a special purpose vehicle. Many lenders favour clear company structures, so price and underwrite differently for SPVs.
Standard Single Buy to Let
For straightforward investment properties let to a single tenant. Typically the widest lender choice, with criteria centred on deposit and rental coverage.
Portfolio Landlord Mortgages
For investors with 4 or more mortgaged properties. Underwriting looks at the whole portfolio — assets, liabilities and rental cover — to ensure the wider position is sustainable.
HMO Buy‑to‑Let
For licensed or large HMOs where multiple tenancies can drive higher yields. Lenders assess property layout, licensing and management experience in addition to rental cover.
Buy‑to‑Let Remortgages & Capital Raise
Investors can refinance to release equity for further purchases, refurbishments, or move to a new product when an initial fixed rate comes to an end. Lenders will review rental income, leverage and the purpose of the funds.
Freehold Block / Multi‑Unit (MUFB)
For a block of self‑contained units on one freehold title. Lender will consider criteria such as the number of units, type of tenants and tenancies, and landlord experience managing multi‑unit investments.
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Loan size: £100k to £5m+ (property, lender and structure dependent)
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LTV: commonly up to 75% for standard BTL. Some lenders may offer up to 80-85%.
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Rates: fixed or variable, depending on LTV, property type and borrower structure (personal or SPV)
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Repayment type: interest-only is most common, but capital and interest is also available
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Tenure/security: single-let, HMO, MUFB and limited-company structures are considered by many lenders
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Portfolio landlords: landlords with 4 or more properties will need to undergo additional assessment to ensure their portfolio is not over-leveraged
What Lenders Look For (Checklist)
✔ Sensible deposit/equity (typically 25%+)
✔ Rental coverage and stress-tested calculations
✔ Experience level appropriate to property type
✔ Clean legal title and property condition suitable for letting
✔ Clear ownership structure (personal or SPV)
✔ Realistic property and rent valuations backed by comparables
✔ Documentation ready - ID, proof of funds, portfolio schedule (if applicable), tenancy information, accounts.
Our Process
Step 1 - Discovery & Goals
We discuss your investment strategy with you, target or existing properties and your leverage goals.
Step 2 - Information & Portfolio Review
We gather key details such as deposit/equity, existing or expected rent, portfolio schedule (if applicable) and basic documents.
Step 3 - Market Search & Indicative Options
We source lenders and products suited to your structure (SPV/personal), property type (HMO/MUFB/standard) and timescales.
Step 4 - Application & Underwriting
We will fully package your application, documentation and any due diligence required to submit your application to the lender, undertake portfolio stress-testing, and liaise on valuation, legal work and any further enquires.
Step 5 - Offer & Completion
We guide your transaction through to completion. Thereafter we can support with property or landlord insurances, or future plans for portfolio growth.
Buy-to-Let Mortgage FAQs
What deposit do I need for a buy to let?
Most lenders expect a deposit or equity of 25%+, which varies by property type, lender and product. Some lenders may have options as little as 15% deposit.
Can I buy through a limited company?
Yes, although special purpose vehicles (SPVs) are preferred by lenders to trading companies. Mortgage options are widely available for SPV companies, in particular for portfolios. Read more in our buy to let investor guide.
Do most BTL mortgages use interest-only?
Yes, most investors opt for interest-only, with capital repaid via sale or refinance. Capital and interest repayment options are also available, and so too are interest-only products that allow overpayments should the investor choose to pay off some of the debt in a lump sum.
How to lenders assess affordability for BTL?
Lenders will usually apply renal stress tests using a notional rate and required coverage ratios (for example 125-145%) to ensure that the investment remains viable should costs increase.
How long does a BTL mortgage take to complete?
Most cases can be completed within 4-8 weeks, depending on valuation, licensing (for HMOs) and legal work required. It may be possible for simple cases may be completed in less than 4 weeks, but complex cases can take longer.
Do you arrange HMO and MUFB mortgages?
Yes, we source House in Multiple Occupation (HMO) and multi-unit freehold block (MUFB) products for our clients. Lenders may expect the landlord to have relevant experience depending on the property type, and/or experienced property managers.