This is very much a case of the specific circumstances of the parts of the house used as an office. Among the issues which the Valuation Office will take into account are:

• The extent and frequency of the non-domestic use of the room
• Any modifications made to the property to accommodate that use
• Whether the character of the room remains as domestic living accommodation
• Specific furniture and equipment in the room

The valuation office has a website. Each case is considered on its own merits, and normally a member of Valuation Office staff will visit the property to check the facts before an assessment is made for non-domestic rates. If you require any further guidance on this subject, contact the Valuation Officer responsible for your area.

Working from home also has tax implications. Some expenses are allowed as a deduction against profits.

There may also be capital gains tax implications arising from running a business from home. In the sale of your primary residence is normally exempt from Capital Gains Tax (CGT). However if part of the premises is used as a business premises a proportion of any gain may be chargeable to CGT. The .Gov website is a good place to start for further information.