CGT on residential property with part used exclusively for business

I sold my property which was a shop with living accommodation over. The split was 75% residential and 25% business. I'm at a loss as to know how to report this on my tax return, i.e. do I declare the VALUE of the asset as just the business part or the whole property and then seek a reduction on the residential part?

Hi michael Sumner,
If both parts were sold together, you would need to break the capital gain into two parts.  75% for residential and 25% for non residential.  In the SA108 (https://assets.publishing.service.gov.uk/media/660bbb40f9ab417b75eea375/sa108_2024.pdf) you would declare the 75 in the residential section, including private residence relief, if allowable.  You would also intlude the non resdiential section at "Other property, assets and gains" and claim Business Asset Disposal Relief (BAD) in this section.  Self assessment will apply the annual exempt allowance as parts of the calculation.
Thank you.