Buying a second home: How mortgages, deposits and conveyancing differ from your main residence

Buying a second home is not simply a repeat of buying your first. The mortgage is assessed differently, the deposit requirement is higher, the stamp duty bill jumps sharply, and the conveyancing carries declarations that do not apply to a main residence. Tax depends on your personal circumstances, and this article is general information rather than advice.

The mortgage needs a bigger deposit and faces double scrutiny

Residential mortgages on a main home stretch to 95% loan-to-value. Second home mortgages do not. Most lenders in 2026 want a deposit of between 15%-25%, many favour 25% or more, and loan-to-value is commonly capped around 85% as a best case.

The affordability test is also tougher, for an unavoidable reason - your income now has to support two mortgages at once. The lender will assess your existing mortgage payment, the new one, and the running costs of both properties. A salary that comfortably supported one home does not automatically support one and a half.

One further distinction matters. A second home mortgage assumes you and your family will use the property. If you intend to let it out, you need a buy-to-let or holiday-let mortgage instead; using the wrong product breaches your mortgage conditions.

Stamp duty brings a 5% surcharge

The heaviest financial difference is stamp duty. In England and Northern Ireland, buying a residential property that leaves you owning more than one means paying a 5% surcharge on top of standard rates on the entire price.

Take a £250,000 second home. Standard stamp duty is £2,500 (nothing on the first £125,000, then 2% on the next £125,000). The surcharge adds 5% of the full £250,000, which is £12,500. The total bill is £15,000, six times what a home mover would pay on the same property. If you are actually replacing your main residence and sell the old one within 36 months, the surcharge does not apply or can be reclaimed.

Conveyancing follows the same process, with extra declarations

The legal process for a second home looks familiar, searches, enquiries, exchange and completion, but a few elements differ. Your conveyancer must establish how many properties you will own on completion and complete the stamp duty return accordingly, with payment due within 14 days of completion. Get the declaration wrong and the liability, and any penalty, is yours.

The are the points your solicitor will want clear from the outset:

• Whether the purchase is a genuine second home, a replacement main residence, or a rental investment, since each has different tax and mortgage consequences.
• How the purchase is funded, because lenders and solicitors both apply extra source-of-funds checks when equity is being released from another property.

If it is your first time through the process in a while, our complete guide to conveyancing walks through every stage.

Timing is worth a thought as well. Second-home purchases are often chain-free on the buyer's side, which makes them faster than a typical move, but the searches, enquiries and mortgage offer still take their weeks, and lenders' extra scrutiny of second-home applications can add time at the offer stage. If the purchase is tied to a season, a summer by the coast, a ski let handover, start the legal work earlier than feels necessary.

The running costs people forget

Ownership costs diverge after completion too.

Over 250 English councils now charge a council tax premium of up to 100% on second homes, which can double the annual bill. Insurance also differs, because standard home policies often exclude properties left empty for long stretches, and when you eventually sell, a second home does not benefit from the capital gains tax exemption your main residence enjoys.

Capital gains tax when you come to sell

The tax differences do not end at purchase. When you sell your main home, private residence relief usually wipes out any capital gains tax bill. A second home gets no such shelter. The gain above your annual exempt amount, currently £3,000, is taxed at 18% for basic-rate taxpayers and 24% for higher-rate taxpayers on residential property.

The administration bites quickly too. UK residents selling a second home at a gain must report and pay the tax within 60 days of completion, a deadline that catches out sellers used to dealing with everything through an annual tax return. If a future sale is part of your plan, keep records of purchase costs, stamp duty and improvement works from day one, since all of them reduce the eventual taxable gain.

The bottom line

Buying a £250,000 second home in 2026 realistically means finding a deposit of £37,500 to £62,500, passing affordability on two mortgages at once, and paying £15,000 in stamp duty rather than £2,500. The legal declarations around the surcharge make experienced conveyancing worth having, so compare conveyancing quotes before you offer.