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Understanding Multiple Dwellings Relief for Annexes and Separate Dwellings

Maximizing Savings Stamp Duty land tax (SDLT)

Loss making business

Detail Guide on Claiming Multiple Dwelling Relief (MDR)

You may be eligible to claim Multiple Dwellings Relief (MDR) and significantly reduce the amount of SDLT payable if you are buying a dwelling with an annexe


Welcome to the Harkia Chartered Accountants’ guide. This article will delve into the intricacies of Multiple Dwellings Relief (MDR) and how it can provide significant tax savings for property owners who have annexes or separate dwellings. Whether you are a homeowner, landlord, or property investor, understanding MDR can be immensely beneficial in optimizing your tax liabilities. So, let’s dive in!

1. What is Multiple Dwellings Relief?

Multiple Dwellings Relief is a tax relief provided by HM Revenue and Customs (HMRC) which aims to decrease the Stamp Duty Land Tax (SDLT) payable on the purchase of multiple residential properties. This relief can be particularly advantageous for those who own annexes or separate dwellings within their property portfolio.

2. Eligibility Requirements for MDR:

To qualify for MDR, certain criteria must be met. Let’s explore the key eligibility requirements in detail:

2.1. Separate Dwelling:

A separate dwelling is a self-contained unit that can be used independently for residential purposes. It should have its own entrance, kitchen, bathroom, and living facilities. Simply put, it should be capable of being used as a separate residence.


Mr Johnson owns a large property with a main house and a detached cottage. The cottage has its own entrance, kitchen, bathroom, and living area, making it a separate dwelling eligible for MDR.

2.2. Annex:

On the other hand, an annexe is an additional part of a building that is used as an integral part of the main dwelling. It may share some facilities with the main house but should retain its separate identity.


Mrs Smith has an annex within her main property with an entrance, bedroom, and bathroom. Although it shares a kitchen with the main house, it qualifies as an annexe eligible for MDR.

3. Calculating MDR:

The calculation of MDR can be a bit complex, but let’s simplify it for better understanding:

3.1. Proportionate Basis:

MDR is calculated on a proportionate basis. This means that the relief is applied to the value of the annexe or separate dwelling rather than the entire property.


Mr Thompson purchases a property for £500,000, which includes a separate dwelling valued at £100,000. MDR would be applied to the £100,000, resulting in a potential tax saving.

3.2. Varying Rates:

The tax rates for MDR depend on the total purchase price of the property and the value of the separate dwelling or annex. The HMRC provides a detailed SDLT calculator to determine the exact relief amount.

4. Claiming Multiple Dwellings Relief:

To claim MDR, you must complete an SDLT return and indicate your eligibility for MDR. Provide accurate details and evidence supporting your claim to ensure a smooth process.

5. Benefits of Multiple Dwellings Relief:

Understanding the benefits of MDR is crucial to fully appreciate its value. Here are some advantages:

5.1. Reduced SDLT:

Property owners can significantly reduce the amount of SDLT payable on purchasing multiple dwellings by claiming MDR. This can result in substantial savings, allowing funds to be redirected towards other investments or improvements.

5.2. Enhanced Rental Income:

Lowering SDLT through MDR can free up capital, enabling property owners to potentially invest in property improvements or attract higher rental income. This can contribute to increased cash flow and overall profitability.

5.3. Competitive Advantage:

MDR can provide a competitive edge for landlords and property investors in the highly competitive property market. The reduced SDLT burden can make their offerings more appealing to potential buyers or tenants.


Multiple Dwellings Relief is a valuable tax relief that can significantly impact the property market. Homeowners, landlords, and property investors can benefit from substantial tax savings by understanding the eligibility requirements and following the correct procedures. If you own an annex or separate dwelling within your property portfolio, seize the opportunity to maximize your financial advantages with MDR. For detailed advice on your specific circumstances, consult with Harkia Chartered Accountants today.

Remember, at Harkia Chartered Accountants, we are always here to help you navigate the complex world of tax and finance. We have successfully made numerous claims of MDR and if the above applies to you, please leave your details and one of our staff will be in touch promptly. 

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