Calculating number of months for exemptions for capital gains tax

Could someone advise bought house 1998 in pounds what rate do i use to convert to euro.
Considering selling in 2023 in euro
lived in house for 11 years no income from rent for 5 years
fitted windows have receipt for them ,kitchen ,tiling no receipt can I add in some figure for this work?
now renting to family member for 4 years How do i add the months exemption if any.

Dodger said:

Could someone advise bought house 1998 in pounds what rate do i use to convert to euro.

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£1 = €1.269738
You may also be able to avail of indexation relief:
But it sounds like you really need to get professional advice.