I think that a qualified surveyor or valuer would be able to do this, if provided with information about the annual charges payable and some data about the letting value of the property in question at different times of the year. Usually the scheme managers provide a service to unit owners in letting their property for unwanted weeks and can probably provide relevant letting data.
However, a professional fee may be quite expensive and it’s questionable whether it’s worth it. You can probably reach some kind of view based on the costs and benefit which you can offer to HMRC as an estimate. My experience is that they are more often a liability than an asset.
In a case I currently have in hand involving a taxable estate the managers run an annual ‘buy-in’ of unwanted timeshares and if their offer is accepted my executor clients will have to pay a premium approximately equal to four times the current annual management fee to rid themselves of the timeshare ‘rights’. I shall try and get the full amount allowed as a liability at the date of death- can anyone speak from experience about whether this is likely to be accepted?
Tim Gibbons