Essential checklist for accidental landlords in the UK

Not everyone sets out to be a landlord. For many it happens by chance: inheriting a property, moving in with a partner, relocating for work, buying a home for a child at university, or letting a house that would not sell. These accidental landlords take on the same legal, financial and practical duties as anyone who chose to let, and the rules have only grown more demanding, particularly since the Renters’ Rights Act came into force on 1 May 2026. This checklist sets out, in order, what you need to do to let safely and stay in control, whether the arrangement is temporary or the start of something longer term. If you are new to letting entirely, our guides for new landlords cover the basics alongside it.

For context on the scale of small-scale letting, the English Private Landlord Survey found that almost half of landlords own a single rental property, and the great majority own fewer than five. Accidental landlords are squarely in that group, and the steps below are written with them in mind.

1. Check your mortgage

The first step is the mortgage on the property. Most residential mortgages do not allow you to let without the lender’s permission, and letting without telling them risks breaching the agreement. Many lenders grant consent to let, a temporary permission that suits a short-term arrangement. For anything longer, you may need to switch to a buy-to-let mortgage, which carries different rates, criteria and fees; the August buy-to-let mortgage calculator lets you model the difference. For context on the wider market, the Office for National Statistics put the average UK private rent at £1,383 a month in the year to May 2026, up 3.5% on the year.

2. Update your insurance

A standard homeowner buildings and contents policy does not cover letting. As soon as you decide to rent the property out you must switch to landlord insurance, which covers risks specific to letting such as tenant damage, loss of rent, liability and legal expenses. This applies even when you let to someone you know, because an ordinary policy may not pay out once the use changes. Our guide to the landlord insurance you need explains the cover types, and if the property is in a flood-risk area, check the flood cover and excess specifically.

3. Meet your legal obligations

Landlords must satisfy a range of legal duties, several reshaped by the Renters’ Rights Act, and failure can mean fines, banning orders or criminal liability. The core duties are:

• Tenancy deposit protection: any deposit must be placed in a government-approved scheme within 30 days, and you must serve the prescribed information about where it is held, as gov.uk sets out.

• Gas safety: arrange an annual inspection by a Gas Safe registered engineer and give the certificate to your tenant.

• Electrical safety: in England, the electrical installation must be inspected at least every five years by a qualified person, with a copy of the report given to tenants.

• Energy efficiency: the property must currently have an Energy Performance Certificate rated at least E to be let. The government confirmed in the January 2026 Warm Homes Plan that the minimum will rise to EPC C for all tenancies from 1 October 2030, so if your property sits below C it is worth planning now; our EPC improvement calculator estimates the cost of getting there and our EPC guide covers the detail.

• Smoke and carbon monoxide alarms: at least one working smoke alarm on each floor, and a carbon monoxide alarm in any room with a fixed combustion appliance, checked on the first day of the tenancy.

• Right to Rent: in England you must check the right to rent of every occupier aged 18 or over before the tenancy begins.

The single biggest change for accidental landlords sits alongside these. Since 1 May 2026 the Renters’ Rights Act has abolished Section 21 “no-fault” evictions, so you can no longer simply give notice to get the property back at the end of a term. Regaining possession now requires a specific legal ground, including grounds for selling the property or moving back into it yourself, and those grounds cannot be used in the early part of a tenancy. If you are letting temporarily with the intention of returning or selling, factor this in from the outset; our Renters’ Rights hub explains the grounds and notice periods.

4. Decide whether to use a letting agent

Many accidental landlords use an agent to handle tenant-finding, referencing and paperwork, which helps if you live far from the property or are short on time. Full management typically costs between 8% and 15% of the rent, more in London, which eats into your return. If you self-manage instead, be sure you understand your responsibilities and stay on top of compliance; software such as August is built for exactly this, and if letting was never the plan, the August app for accidental landlords walks you through each duty in order.

5. Prepare the property

Before letting, clean the property thoroughly, make sure appliances and fittings are safe and working, and deal with any needed repairs. A well-presented property attracts more reliable tenants and a better return. Prepare a detailed inventory recording condition and contents, supported by photographs and signed by both parties at the start of the tenancy, because a good inventory is the document most likely to resolve a later dispute fairly. Our free printable templates include an inventory sheet to start from.

6. Choose the right tenants

Referencing matters even when you know the tenant. Carry out credit checks, employment verification, previous-landlord references and identity confirmation; the August rent affordability calculator gives a quick first check of whether an applicant’s income covers the rent. Put the tenancy in writing with all the terms now required under the Renters’ Rights Act, and be aware that the tenancy itself has changed: since 1 May 2026, new tenancies in England are periodic assured tenancies rather than fixed-term assured shorthold tenancies, and you must give the tenant a written statement of terms at the outset. Our tenancy agreement guide covers what to include. In Wales, lettings use the occupation contract under the Renting Homes (Wales) Act 2016.

7. Stay on top of repairs and maintenance

You are responsible for the structure and exterior and for the installations for water, gas, electricity, heating and sanitation. Respond promptly to maintenance requests and keep a record of all work, and carry out periodic inspections to catch problems early, giving the tenant at least 24 hours’ written notice before a visit. Striking a fair balance between protecting the property and respecting your tenant’s quiet enjoyment is both good practice and, increasingly, a legal expectation.

8. Sort out your tax

Rental income is taxable and must usually be declared to HMRC. If your gross rental income is over £1,000 you generally need to register for Self Assessment and file a return, and our guide to registering with HMRC as a landlord walks through the deadlines. Against the income you can set allowable expenses such as agent fees, repairs, insurance and mortgage interest within the current 20% credit. Most accidental landlords file an ordinary return, but if your combined property and self-employment income is above £50,000, Making Tax Digital for Income Tax has applied since April 2026 and requires digital records and quarterly updates. And if you later sell a property that has risen in value, Capital Gains Tax may apply, though valuable relief is usually available where the property was once your own main home. HMRC takes undeclared rental income seriously, so get this in order even for a short let.

9. Keep good records

Organisation is half the job. Keep clear records of rent, tenant correspondence, safety certificates, repairs, expenses and insurance, because if you are ever challenged, by a tenant, the council or HMRC, good records are your defence. August stores all of it in one place, from documents and certificates to rent tracking and maintenance history, which is particularly helpful when letting was not the original plan.

10. Plan for the unexpected, and the long term

Even good tenancies hit difficulty, so hold a contingency fund of roughly 10% to 15% of annual rent for voids, emergency repairs and legal costs. On the current average rent of £1,383 a month, that is annual income of about £16,596, so a reserve of roughly £1,660 to £2,490. Rent guarantee insurance is worth considering if you rely on the rent to cover the mortgage. Finally, be clear about your intentions, because they shape everything else: if you may want to sell or move back in, remember that since the Renters’ Rights Act you will need a valid ground and notice to regain possession, so our guide to selling a rental property is worth reading before you commit either way. If the arrangement turns out to suit you, the decision flips from exit to continuation. Our guide to whether being a landlord is worth it sets out the honest economics of staying in deliberately rather than by default."

Frequently asked questions

Do I have to tell my mortgage lender if I let my home? 

Yes. Most residential mortgages require the lender’s consent to let. Letting without it can breach your agreement, so ask about consent to let for a temporary arrangement or a buy-to-let mortgage for the longer term.

Do I need to register for tax if I only let temporarily? 

Usually yes. If your gross rental income is over £1,000 you generally need to register for Self Assessment and declare it, however short the let. HMRC actively identifies undeclared rental income.

Can I get my property back if I let it? 

Yes, but not on a no-fault basis. Since 1 May 2026, Section 21 has been abolished, so you regain possession using a specific ground, such as selling or moving back in, with notice, and those grounds cannot be used in the early months of a tenancy.

Does my property need an EPC? 

Yes. It must be rated at least E to be let now, and the minimum rises to EPC C for all tenancies from 1 October 2030. If you would rather manage all of this in one place, you can start for free on August.

And finally

Becoming an accidental landlord can feel daunting, but treated seriously it is manageable. You now have legal duties and a duty of care to your tenant, and meeting them, keeping clean records, maintaining the property and building a fair relationship with your tenant, puts you in a strong position whether you let for one year or twenty. For a stage-by-stage version covering pre-tenancy compliance through to move-in day, see our landlord checklist for renting a house.

If you choose to self-manage, make sure you fully understand your legal responsibilities, stay on top of compliance checklist tasks and remain accessible to your tenants.

This article is a guide and not legal, financial or tax advice. Rules change and circumstances vary, so always consult a suitably qualified professional about your own situation. Accurate at the time of writing in 2026.