Buy-to-let houses vs flats: 10 things landlords should know

Choosing between a buy-to-let house or flat is one of the bigger decisions you make as a landlord, because the property type shapes your yield, your mortgage, your maintenance bill, your tenant profile and your long-term capital growth all at once. The short version is that flats tend to win on entry cost and gross yield, while houses tend to win on capital growth, control and net return once leasehold costs are stripped out. The right answer depends on your capital, your goals and your local market. This guide compares the two across ten factors and ends with a framework to help you decide. For the wider context, see our guide to how to invest in UK property. If you have already settled on one type, our deeper reads on whether buying a flat is a good investment and whether it is worth renting out a house go further on each.

1. Purchase price and deposit

Flats are usually the cheaper way in. A one-bedroom flat outside London often sits in the £100,000 to £180,000 range, needing a 25% deposit of roughly £25,000 to £45,000, while two-bedroom terraced houses tend to start around £150,000 to £220,000 and three-bedroom semis higher still. The lower entry point makes flats easier for a first purchase or for spreading capital across more than one property. The catch, covered below, is that flats carry service charges and ground rent that houses do not, so a lower price does not always mean a better return.

2. Rental yield

Gross yield often favours flats, especially in city centres with strong professional demand. A £150,000 one-bedroom flat let at £850 a month produces a gross rental yield of about 6.8%, against roughly 6% for a £280,000 three-bedroom house at £1,400 a month. Net yield, though, often swings back to houses once you deduct a flat’s service charge (commonly £1,500 to £3,000 a year) and ground rent. Regional patterns matter: northern cities and the Midlands frequently show flats ahead on yield, while southern markets often reverse that on the strength of family-house demand. Our rental yield calculator lets you model both with the real costs deducted.

3. Mortgages and lending

Most mainstream lenders price houses and flats similarly, provided a flat has a long enough lease (typically at least 70 years, and certainly not a short lease) and is not above commercial premises. Flats in high-rise blocks, ex-local-authority blocks, or with short leases face fewer lenders and higher rates. Both types must clear the rental coverage test, usually rent at 125% to 145% of the mortgage payment, and a house’s higher absolute rent can clear that more comfortably. For how the products and stress tests work, see how buy-to-let mortgages work, and use the buy-to-let mortgage calculator to check whether your expected rent clears the coverage test.

4. Maintenance costs and control

This is one of the starkest differences. With a house, you are responsible for everything: roof, walls, garden, drains and all the rest, typically 5% to 8% of rent for a modern build and 10% to 15% for an older one, with lumpy costs such as a roof (£3,000 to £8,000) or a boiler (£1,500 to £3,000) arriving on their own timetable. A leasehold flat shifts the major structural work to the freeholder, paid for through the service charges, leaving you responsible mainly for internal fixtures and appliances. The trade-off is control. With a flat you cannot choose when the block is re-roofed or what it costs, and a major-works bill served under a Section 20 notice can run to many thousands of pounds with little warning. A house gives predictable, controllable costs; a flat gives convenience but exposure to service-charge inflation.

5. Tenant demand and tenancy length

Flats tend to attract young professionals, couples and sharers who prioritise location over space, with tenancies often running twelve to eighteen months and more frequent turnover. Houses tend to attract families and mature professionals who value gardens, parking and extra bedrooms, and who often stay two to three years or longer, particularly where children are settled in school. Longer tenancies mean fewer voids and lower turnover costs, which is why houses generally edge it for landlords who want stable, predictable income, while flats can suit those comfortable with more active management in a strong rental market.

6. Capital growth

Over long periods, UK houses have tended to appreciate faster than flats, often by something like half a point to a point and a half a year, driven by land scarcity, the breadth of the family-buyer market, and the absence of leasehold drag. Flats can match or beat that in specific situations, such as new-builds in regeneration areas or city centres with constrained supply, but leasehold works against them as the lease shortens: values start to suffer materially below about 80 years, and below 70 years a flat becomes hard to sell or mortgage. Extending a lease can cost several thousand pounds upwards. For growth-focused strategies, freehold houses generally have the edge; flats suit income-focused or shorter-horizon plans.

7. Leasehold, ground rent and reform

Most flats are leasehold, which brings two recurring costs houses avoid: the service charge, and ground rent paid to the freeholder. Both are tax-deductible against rental income, but both erode net yield and can rise. The legal landscape here is changing: the Leasehold and Freehold Reform Act 2024 is phasing in cheaper and longer lease extensions, ground rent reform, and a ban on new leasehold houses, with much of the detail arriving through secondary legislation. If you are buying a flat, read the lease carefully before you commit: check the remaining term, the ground rent terms, the service-charge history, and any clauses that restrict letting, subletting or HMO use.

8. Stamp duty and tax

Additional properties carry a stamp duty surcharge of 5% on top of standard rates, raised from 3% on 31 October 2024. On a £200,000 flat that means roughly £11,500 in stamp duty as of 2026, and on a £300,000 house roughly £20,000, so confirm the figure for your price with the stamp duty calculator before you offer. Beyond purchase, both types are treated the same for Section 24 mortgage-interest relief, though a house’s larger mortgage can mean a larger absolute impact. Capital gains tax on disposal is currently 18% for basic-rate and 24% for higher-rate taxpayers on residential property, the same for both, though houses’ stronger growth can mean a larger gain to tax.

9. Licensing and compliance

The core compliance load is identical: an annual gas safety certificate where there is gas, a five-yearly EICR, a valid EPC, working smoke and carbon monoxide alarms, deposit protection and right-to-rent checks. Selective licensing, where a council requires a licence for all lets in an area, applies equally to both. The difference shows up with HMOs: houses are often more practical to run room-by-room than flats, both for their layout and because leasehold flats may have covenants restricting HMO use or letting at all. On energy efficiency, the planned move to a minimum EPC C by 2030 will affect both, and which is cheaper to upgrade depends on the specific property rather than the type.

10. Exit and resale

Houses sell to the widest pool, owner-occupiers as well as investors, and tend to be more liquid, particularly in family areas. Flats sell mainly to first-time buyers, downsizers and other investors, a narrower pool that can mean longer sale times, and a short lease can stall a sale entirely until it is extended. Houses also tend to attract better refinancing terms, which matters if you plan to release equity to grow a portfolio. As above, plan a flat’s lease length well ahead of any sale so it never becomes the thing that holds up a buyer.

Making your decision

Choose a flat when your capital is limited and you want to enter quickly, you prioritise gross yield over growth, you want lighter day-to-day management and can absorb service-charge volatility, and you are targeting professional or couple tenants in a city location.

Choose a house when you want stronger long-term growth, you prefer predictable and controllable costs without service charges, you are targeting family tenants and longer tenancies, and you value full control over the property without a freeholder in the loop.

Many landlords end up holding both, pairing higher-yield city flats with family houses in commuter towns to balance income against growth. Whichever way you go, the running of it is the same daily work of rent, compliance and maintenance. August’s maintenance tracking keeps repairs, documents and reminders in one place for either property type.

Frequently asked questions

Do flats or houses have better rental yield? 

Flats often have higher gross yield, especially in cities, but houses frequently have better net yield once a flat’s service charge and ground rent are deducted. Always compare on net, not gross.

Are flats a bad investment because of leasehold? 

Not inherently, but leasehold adds cost and a depreciation risk as the lease shortens. A flat with a long lease, reasonable service charge and sensible ground rent can be a sound income investment; a short lease is the main thing to avoid.

Is it harder to get a mortgage on a flat? 

Usually only for flats with short leases, in high-rise or ex-local-authority blocks, or above commercial premises. A standard flat with a long lease is financed much like a house.

Which has better capital growth? 

Historically houses, mainly because of land value and the breadth of the buyer market. Flats can compete in supply-constrained city locations but carry leasehold drag.

The bottom line

There is no universal winner. Flats lower the cost of entry and can deliver strong gross yields with lighter management; houses offer better growth, control and net returns, with more hands-on upkeep. Decide which matters most for your capital and your time horizon, model the real numbers including leasehold costs and the 5% surcharge, and the choice usually makes itself.

Disclaimer: This article is a guide and not intended to be relied upon as legal, tax or financial advice, or as a substitute for it. August does not accept any liability for any errors, omissions or misstatements contained in this article. Always speak to a suitably qualified professional if you require specific advice or information.