Yes, buying residential property through a limited company triggers stamp duty tax (SDLT). The standard rates of stamp duty tax apply. On top of that, investors have to pay an extra 3% stamp duty tax. This includes both companies and individual landlords owning other properties already. Good to know: Companies and partnerships have to pay another tax called the Annual Tax on Enveloped Dwellings. This applies only for property values > 500k. The tax rate works out at about 0.5% of the value (exact rates here).