A lease extension calculator is not the considered opinion of a Chartered Surveyor. It does not take into account all of the variables, or allow for changes in ground rent or lease irregularities. Specific statutory assumptions apply when determining the ‘short lease’ value and inaccuracy here can significantly affect the end premium that is produced.
We are using the parameters of relativity following the general guidance of the RICS Research Document 2009 on graphs of relativity.
The figures above should not be used in a Notice of Claim or as an informal offer. There may be other issues that need to be taken into account and you obviously want to be as accurate as possible in your negotiations.