Buy-to-Let Remortgages

Refinancing an investment property is the same machine with different settings — here is what changes.

Remortgaging a rental property follows the same legal process as a home remortgage — deeds, title, undertakings, redemption, registration — but the lending context is different: buy-to-let rates and loan-to-value limits are less generous, the lender underwrites the rent as well as the borrower, and the tenancy itself becomes part of the due diligence.

Two common scenarios bring landlords here: refinancing an existing buy-to-let loan for a better rate or to release equity, and regularising an accidental landlord situation — a former home, still on a residential mortgage, that has been quietly rented for years.

The accidental landlord and consent to let

Most residential mortgage conditions require the property to be your principal residence and require the lender's consent before letting it. If you moved on and rented the house without that consent, you are likely in technical breach of your mortgage conditions — common, rarely enforced aggressively, but exactly the kind of thing a refinance surfaces.

A remortgage is the clean way to fix it: refinancing onto a buy-to-let product puts the loan and the reality in alignment. Some lenders will alternatively grant retrospective consent to let on the existing loan. Either way, deal with it deliberately rather than leaving it to be discovered.

What the lender checks about the tenancy

Expect the lender to want the tenancy documented: the lease or tenancy agreement, evidence of registration with the Residential Tenancies Board (registration is a statutory obligation, and since 2022 an annual one), and the rent — which feeds its rental cover calculation. Where the property is in a Rent Pressure Zone, the rent history matters too, because the RPZ rules cap increases and a rent set unlawfully high is not a rent the lender should underwrite.

None of this is optional paper: an unregistered tenancy is a compliance breach with the RTB, and it is better fixed before the application than explained during it.

Title and multi-unit issues

Investment properties throw up their own title patterns: apartments held under long leases with management company structures (where service charge arrears and the management company's good standing get checked), houses converted into units (where planning for the conversion is the question), and properties bought in receiverships or from loan sale portfolios (where the prior deeds history deserves careful reading). Each is manageable; each is better disclosed at the first meeting.

Releasing equity from a rental

Using accumulated equity in one rental to fund the deposit on the next is a standard portfolio-building structure, subject to the lender's loan-to-value limits for investment property and its policy on purpose of funds. The conveyancing is a normal equity release; the underwriting is stricter. Where several properties and loans are involved, cross-security and all-sums-due clauses in older facility letters need particular attention — a charge you thought secured one loan may secure them all.

Tax: flagged, not advised

Buy-to-let refinancing lives next door to several tax questions — deductibility of interest against rental income, the treatment of equity released from a rental, capital gains on eventual sale. These are matters for your accountant, and the structuring decisions should be made with that advice before the remortgage completes. We do not advise on tax; we will make sure the legal structure matches the advice you receive.

Frequently asked questions

Can I keep my residential rate if I rent out my house?

Your mortgage conditions almost certainly require lender consent to let and may entitle the lender to move you to a buy-to-let rate. Renting without consent is a breach of conditions. A remortgage onto the correct product, or formal consent to let, regularises it.

Does my tenant affect the remortgage?

The tenancy is part of the lender's due diligence — expect to produce the tenancy agreement, RTB registration and rent details. The tenant does not sign anything and their tenancy continues unaffected by the change of lender.

Must the tenancy be registered with the RTB?

Yes — registration (renewed annually) is a statutory obligation on landlords, and lenders routinely ask for evidence of it on buy-to-let applications.

Can I release equity from a rental to buy another property?

Yes, subject to buy-to-let loan-to-value limits and the lender's purpose-of-funds policy. Watch for cross-security in existing facilities, and take tax advice on the structure from your accountant first.

Are buy-to-let legal fees higher?

Modestly, where the transaction involves extra elements — tenancy due diligence, management company enquiries on apartments, or multiple properties. The section 150 letter will price the actual transaction.

Talk to a remortgage solicitor

Mary Molloy Solicitors acts for homeowners and property owners across Ireland on remortgages, switches, top-ups and transfers of equity. All enquiries are handled through our Dublin office.

This page contains general information about Irish law and practice. It is not legal advice, it may not reflect your circumstances, and reading it does not create a solicitor–client relationship with Mary Molloy Solicitors. We do not advise on taxation; please speak to your accountant or Revenue. In contentious business, a solicitor may not calculate fees or other charges as a percentage or proportion of any award or settlement.