Lease extension valuation
Additional costs to plan for
In addition to the premium (price), you will normally pay:
- your own valuer’s and solicitor’s fees
- the landlord’s reasonable legal and valuation costs (not their tribunal costs)
- any disbursements such as Land Registry fees, searches or registration costs
- tribunal or court fees if a dispute needs to be determined formally
Tax and Land Registry
Stamp Duty Land Tax (SDLT) may apply if the premium or any consideration exceeds HMRC thresholds. Your solicitor will calculate this.
The new lease must be registered at HM Land Registry. We recommend that you budget for HM Land Registry and solicitor registration fees.
Mortgage lender consent
If you have a mortgage, you’ll need your mortgage lender’s consent before the new lease can be completed. Usually, the solicitor arranges a document called a deed of substituted security with the lender.
Make sure your solicitor has your mortgage details early to avoid delays.
- Last updated:
- 16 December 2025
- Next review:
- 16 December 2027
Related content
What to consider before starting a lease extension and how to prepare.
Advice guideHow the informal lease extension process works and what to consider before agreeing
Advice guideStep-by-step guidance on extending your lease using the formal legal process
Advice guide