lease extensions calculator

Estimate your Lease extension
with our calculator

Simply answer these questions below

*This is the estimated market value of the property with an extended lease

Rough estimate only

This lease extension calculator is intended to give the user a rough estimate for the premium payable for a 90 year lease extension under the terms of the Leasehold Reform, Housing and Urban Development Act 1993. Law and values used within the calculation are prone to change, which will affect the figure given.

The calculator does not take into account rising ground rents. Under no circumstances should the figure be relied upon and no further action should be taken without professional advice.

It does not take into account any other costs, including valuation and legal fees that are payable by a leaseholder under the terms of the Act.

The figure reported should not be used to serve notice or a counter notice nor should it be used at any tribunal or court proceeding.

Arnold & Baldwin accept no liability or responsibility to any person or organisation relying upon the information contained in this Website.

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Your Lease Extension

Estimated premium: £0.00

A simple FOUR step process to extending the Lease of your property(s)

1. Calculate the cost of your Lease Extension

Use our Free Lease Extension Calculator above to determine an estimate for extending your property(s) lease.

2. Book Your Expert Surveyor

Now you have your estimate you can book one of our expert surveyors. There maybe a product fee (from £600) on top of your lease extension estimate depending upon your circumstance and based upon your property value if applicable.

So, which of the below applies to your circumstance?

I am a Leaseholder

I want to extend my lease
From £600.00
Book Now
I have been served a section 42 notice
From Free
Book Now
My leaseholder wants to extend their lease informally
From Free
Book Now

3. WE'll contact you

Our Lease Extension experts will be in contact with you to discuss your requirements, options and the process.

4. Relax, we'll do the rest

Now our team of honest, approachable experts have made contact, you can sit back and allow us to do the work.

Further reading

If you are still unsure about the lease extension process then please read this article.

What is the lease extension process?

Alternatively, please call our honest, approachable experts who will be more than happy to give you advice 020 8642 2999

FAQ and Jargon Buster question mark Jargon Busting and FAQ's

What does Leasehold mean?

Leasehold means that you own the property, but the land upon which the property is built is owned by the freeholder (or landlord). This gives you the right to occupy the property for as long as the lease is valid.

What is Ground Rent?

If your property is a leasehold property you'll have to pay an annual charge, known as ground rent, to the person who owns the freehold as specified in the lease.

What is a Section 42 Notice?

A Section 42 Notice (also known as a Tenant’s Notice) is served on the landlord/freeholder of a property and starts the purchase of the freehold or lease extension process. Once a valuation of the property has been carried out by your surveyor they will send the valuation on to your solicitor.

Next, your solicitor will serve a Section 42 Notice on your landlord/freeholder advising the amount you are willing to pay for the freehold.

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4.7 Average rating on Google
Here's what our customers say


Professional, efficient surveyors. Get the job done in a timely manner, had our survey back within 5 days of inspection. All team members I spoke with (Tiffany and Billy) were really lovely. Highly recommend. :)


I have only just started working with Stephen and he has already demonstrated the high levels of customer attention and dedication that this company has. The first impression he has caused is such that made me write this review. I have no doubt that the continuous service will be of same level. Looking forward to working further with Stephen. Well done!

Steve Kenny

Lease extension - I found Daniel Grove very professional and had an excellent understanding of all aspects relating to this transaction. Advice was invaluable, and it was nice to come across someone who did exactly what they said they were going to do. Would not hesitate in recommending the firm and Daniel to anyone who has a lease to extend.

Petros Kyrkilis

Amazing job and fully professional treatment. The surveyor went above and beyond to check for everything, when he could have easily claim lack of access. In addition he was more than happy to answer questions over the phone and be there to explain the steps.

Lynn Wilson

Within 48 hours I received my detailed report from Joe Arnold which enabled me to see the property as it was and not through rose-tinted glasses! The report highlighted areas where money might need to be spent and provided guidance on questions for my solicitor - just what I needed. Overall, the survey enabled me to re-assess my offer and in this respect was invaluable. Thank you for a friendly and professional service.

Mark Roberts

100% choose this company. As first time buyers we had a mortgage valuation which said the house was fine. The Arnold & Baldwin survey found over £30,000 of problems. Holes in the roof with daylight visible, damp, woodworm, broken sash windows and poor electrics. This company helped us renegotiate and save a fortune.


Arnold & Baldwin came recommended and I’ve got to say they were brilliant - not just in identifying issues with the property I was looking at but in the way they kept me informed and up to date (ie picking up the phone instead of just posting / emailing communications with you). After dealing with estate agents for so long, it’s nice to have someone who is genuinely on your side.

Kamal Rahman

From my initial interaction with the firm I found them to be prompt, courteous and helpful. I received a detailed Homebuyers report within a week of instructing and was given the opportunity to talk it through with the attending surveyour. Overall excellent service all round, would certainly recommend this firm.

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