Buy-to-Let Mortgages in Northern Ireland

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Investing in a rental property?

Quick answer: a buy-to-let mortgage is for a property you rent out rather than live in. Whether you are buying your first rental or building a portfolio, and whether you buy personally or through a limited company, Crawford Mulholland guides landlords across Belfast and Northern Ireland through every step, with free initial advice.

TL;DR

  • Advice for first-time and portfolio landlords.
  • Personal or limited company (SPV) ownership — we explain the differences.
  • Buy-to-let usually needs a larger deposit, often 20–25% or more.
  • Interest-only options are common for landlords.
  • Access to broker-only buy-to-let deals.

Why use an advisor for buy-to-let?

Buy-to-let is more complex than a standard residential mortgage, and many of the best deals are broker-only. An advisor helps you:

  • Choose the right structure: personal ownership or a limited company (SPV), each with different tax treatment.
  • Pass the rental stress test: lenders check the rent covers the mortgage at a stressed rate.
  • Access more lenders: including specialist and broker-only buy-to-let products.
  • Plan a portfolio: structure additional purchases efficiently.

For our wider overview, see mortgage advice and support.

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Who we help

First-time landlords

Buying your first rental? We guide you from deposit and structure through to completion.

Portfolio landlords

Adding to a portfolio? We help you structure purchases and work with lenders comfortable with multiple properties.

Personal or limited company (SPV)

We explain the differences between owning personally and through a limited company, and arrange the right mortgage for either.

Working with tax advisers

Tax treatment of buy-to-let can be complex. We work alongside reputable tax advisers so you can make an informed decision.

How the buy-to-let process works

Most buy-to-let purchases follow the same path:

  • Strategy and structure: personal or limited company, and your goals for the property.
  • Rental affordability: we check the expected rent against lender stress tests.
  • Find the lender: we compare buy-to-let products, including broker-only deals.
  • Apply: we submit to the most suitable lender.
  • Valuation & completion: the lender values the property and issues the offer.
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What lenders look at for buy-to-let

Buy-to-let lending is assessed differently from a residential mortgage:

  • Rental income: the expected rent must cover the mortgage by a set margin at a stressed interest rate.
  • Deposit: usually larger than residential, often 20–25% or more.
  • Your position: some lenders also consider your personal income and experience as a landlord.
  • Ownership structure: personal or limited company (SPV).
  • The property and your credit: valuation, construction type and credit history.

Documents you usually need

Exact requirements vary by lender, but having these ready makes the process smoother:

  • Photo ID (passport or driving licence)
  • Proof of address
  • Recent bank statements
  • Deposit evidence where relevant
  • Details of the rental property and expected rent
  • Personal income evidence
  • Company details if buying through a limited company (SPV)

To estimate figures, use our mortgage calculator.

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Mortgage options explained (plain English)

Choosing a mortgage is not only about the rate — it is about how the deal behaves over time and how much flexibility you need.

Fixed vs tracker vs variable

  • Fixed rate: your rate stays the same for a set period (e.g. 2, 3 or 5 years).
  • Tracker: your rate moves with a base rate (plus or minus a set margin).
  • Variable rate: the lender can change the rate; it may or may not track the base rate.

Repayment vs interest-only

  • Repayment: you pay interest and reduce the balance over time.
  • Interest-only: you pay only the interest and repay the balance later (strict criteria apply).

Term, fees and flexibility

Mortgage terms, product fees and early repayment charges all affect the overall cost. We talk these through clearly.

Buy-to-let notes

Personal vs limited company (SPV)

Many landlords now buy through a limited company, or SPV, for tax reasons, while others buy personally. The right choice depends on your circumstances, so we work alongside a tax adviser before you decide.

Deposit and the rental stress test

Buy-to-let usually needs a larger deposit, often 20 to 25% or more, and lenders check that the rent covers the mortgage by a set margin at a stressed rate.

Interest-only

Many landlords choose interest-only to keep monthly payments lower and manage cash flow, repaying the balance at the end of the term.

Broker-only deals

Many of the most competitive buy-to-let products are only available through a broker, which is where we can help.

FAQs

  • How much deposit do I need for a buy-to-let?

    Buy-to-let usually needs a larger deposit than a residential mortgage, often 20 to 25 percent or more. A larger deposit generally opens up better products.

  • Should I buy personally or through a limited company?

    Both are common, and the right choice depends on your tax position and plans. We explain the differences and work alongside a tax adviser so you can decide with confidence.

  • What is a rental stress test?

    Lenders check that the expected rent covers the mortgage payment by a set margin at a stressed interest rate. It is a key part of how much you can borrow on a buy-to-let.

  • Can I get an interest-only buy-to-let mortgage?

    Yes, interest-only is common for landlords because it keeps monthly payments lower. You repay the balance at the end of the term, usually by selling or refinancing.

  • Can you help first-time landlords?

    Yes. We regularly help people buying their first rental property, guiding you through deposit, structure, the stress test and completion.

  • Can you help portfolio landlords?

    Yes. We work with lenders who are comfortable with multiple properties and help you structure additional purchases efficiently.

  • Is buy-to-let regulated by the FCA?

    Most buy-to-let mortgages are not regulated by the Financial Conduct Authority, although some are. We will explain where you stand for your particular case.

  • Do you charge a fee?

    Fee arrangements vary depending on the work involved and the product. We explain any fees clearly before you proceed.

  • What is the first step?

    Share a few basics about the property and how you plan to own it. We will advise on structure, lenders and next steps.

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Next steps

Your home may be repossessed if you do not keep up repayments on your mortgage.

The Financial Conduct Authority does not regulate most buy-to-let mortgages. Your property may be repossessed if you do not keep up repayments on your mortgage.

If you would like to discuss a buy-to-let mortgage, the fastest way to start is to share your basics securely so we can prepare for your free initial conversation: complete our mortgage questionnaire.

Prefer to message the team first? Use our contact page, or book a free initial consultation.

Belfast Branch: 348 Lisburn Road, Belfast, BT9 6GH
Tel: 028 9066 5544
Email: office@crawfordmulholland.com

Related mortgage services

Explore our other mortgage services, or speak to the team about your plans:

Ready to talk? Book a free initial consultation.