There are several benefits to buying a garden office for work use, such as Tax Breaks and if you are VAT Registered, offsetting the VAT, so if you are self employed or a business owner talk to your accountant early on in the buying process so that you can optimise these benefits.
It’s important to be clear with your accountant about the type of garden office you are choosing, so they can help advise you, for instance a portable garden office is more tax efficient than a permanent e.g fully plastered one, so find out where you stand early on.
Your accountant will also advise you on who you have to inform that you’re working at home, on many mortgages it’s stated that you must inform them if you run a business from home.