Selection of cost method for CGT calculations

[maws]

There have been so many changes to the possible choice of property cost for CGT purposes that I am now confused. I thought the latest was that a 5th April 2020 valuation could be taken... or was it 5th April 2017 or 8 ...... or original cost or some other method.
Can anyone enlighten me?
Thanks

[jerome.lane]

I’m not sure that makes sense! Can you be more specific?

[pawncob]

https://www.gov.uk/government/publications/land-and-leases-the-valuation-of-land-and-capital-gains-tax-hs292-self-assessment-helpsheet

[maws]

Property cost 600,000 in March 2010
At 5/4/2018 valued at 900,000
Say a sale takes place in 2020/2021 what are the different results for using different costs?
Assume lived in from April 2010 to December 2013

[bd6759]

The gain is the selling price less the allowable expenditure. That is the definition of gain.

There are no provisions to arbitrarily include a valuation at a random date.