“How much will my lease extension cost?” This is always the most important question Leaseholders want answered. We have come up with this quick and easy calculator to give you an indication of the likely cost of your lease extension. To use our lease extension calculator simply fill out the required information and our easy to use calculator will produce a broad range estimate.

Unexpired term (years)

This is the number of years remaining on your lease at the moment.

Existing lease value (£)

This is the approximate price your property would sell for on the market with its current lease.

Long lease value (£)

This is the approximate price the property would sell for on the market with its extended lease.

Ground rent (per annum in £)

The ground rent you pay annually to your freeholder. This may be a rising amount (e.g. £100 per annum for the first 33 years, £200 per annum for the next 33 years, and £300 per annum for the remainder of the term), however you can enter the average or mid-range amount here. Please note that some leases are subject to onerous ground rents and this will need to be investigated further.

DISCLAIMER: 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.

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.