When a flat is owned by two people, a lease extension is not something one owner can usually push through alone. Whether you bought with a partner, inherited a share, own a buy-to-let with an investor or have separated since purchase, the question is the same: can joint owners extend leases?
Usually, yes. But the extension needs to reflect the legal ownership of the lease, and that means getting the right people involved from the outset. A missed signature, an incorrectly served notice or disagreement between co-owners can add delay and cost just when a shorter lease is already putting pressure on value and mortgage options.
Can joint owners extend leases together?
Joint owners can extend a lease, either through the statutory route or by negotiating directly with the freeholder. The key point is that all registered leaseholders normally need to participate in the transaction.
This applies whether you own as joint tenants or tenants in common. These terms affect what happens to each owner’s share if one dies or sells, but they do not change the practical fact that both names are on the lease and Land Registry title. The lease extension documentation will generally need to be signed by every legal owner.
For a statutory lease extension, the formal tenant’s notice should identify all qualifying tenants and be served correctly. If the freeholder accepts the claim, the new lease is granted to the joint owners. For an informal, negotiated extension, the freeholder will also expect all owners to approve and execute the documents.
There is no advantage in treating a joint lease as though it belongs to only one person. Doing so can create a defective process that is expensive to correct later.
The statutory route: what joint leaseholders need to check
Under the current statutory framework, most qualifying leaseholders of flats in England and Wales can seek a 90-year extension to the existing term, with ground rent reduced to a peppercorn. Eligibility is technical, but joint ownership does not prevent a claim.
The qualifying criteria apply to the leasehold interest as a whole. In many cases, the joint owners must have owned the lease for at least two years before serving a statutory notice. That does not necessarily mean each owner must have held their individual share for two years, but the ownership history should be checked carefully, especially where one owner was added to the title later.
The statutory process has strict requirements. A notice must include the proposed premium and other prescribed information, and it must be served on the competent landlord. Once served, it starts a formal timetable and gives the leaseholders important protections. It also creates responsibilities, including liability for the landlord’s reasonable valuation and legal costs.
That is why a realistic valuation and accurate ownership details matter before anything is served. A low figure used simply to open negotiations can cause problems if it is not professionally supported.
If one joint owner will not cooperate
A joint owner cannot normally force through a lease extension in their sole name while another legal owner remains on the title. Both parties have an interest in the lease, and the landlord is entitled to know that the people receiving the new lease have authority to do so.
The first step is usually practical rather than legal: establish why the other owner is reluctant. They may be worried about cost, believe the flat will not be sold soon, or be unclear about how a short lease affects future lending and value. A clear valuation and an outline of the likely costs can often move the conversation forward.
Where owners have separated, are in dispute or one is difficult to locate, specialist legal advice may be needed. A court order, trustee appointment or change in ownership may be relevant in some circumstances, but these are not quick workarounds. The lease should not be allowed to deteriorate while a co-owner dispute is left unresolved.
A jointly owned flat with a mortgage
Most jointly owned flats are also mortgaged. The lender’s interest must be considered because a lease extension often involves replacing the existing lease with a new one, or completing a deed that changes the lease terms.
Your solicitor will usually deal with the lender’s consent and any necessary changes to the mortgage security. Do not assume this will happen automatically or leave it until completion. Lenders have their own requirements, and delays can arise if names, mortgage details or title documents do not match.
If only one owner is responsible for paying the mortgage, that does not give them sole authority to extend the lease. Legal title, not day-to-day payment arrangements, determines who needs to be involved.
Informal extensions can work – but check the terms
A negotiated lease extension can be quicker and more flexible where the freeholder is willing to engage. It may be useful for joint owners who want to agree timing, premium and paperwork without following the full statutory timetable.
However, flexibility is not the same as protection. A freeholder may offer a longer term but retain or introduce ground rent provisions that affect the flat’s future saleability or mortgageability. The premium may also be higher than a statutory valuation would suggest.
Joint owners should look beyond the headline number of years added. Check the new ground rent, rent review pattern, term, legal costs and whether the agreement changes any other lease terms. If one owner is focused on keeping the upfront price down while another wants the strongest long-term outcome, these trade-offs need to be discussed before terms are agreed.
A statutory route can provide more certainty on the form of extension. An informal route can be sensible where the proposed terms are genuinely favourable. The right choice depends on the lease, the freeholder’s approach, the urgency of a sale or remortgage, and the owners’ shared priorities.
What happens if one owner wants to sell?
A short lease can make a jointly owned flat harder to sell, particularly once it approaches 80 years remaining. At that point, marriage value can become payable under the existing statutory rules, increasing the likely premium. Mortgage availability may also narrow as the term falls.
If the joint owners plan to sell, they may be able to start the statutory lease extension process and assign the benefit of the claim to the buyer on completion. This can make the property more attractive because the buyer does not have to wait for their own qualifying period before progressing the claim.
This route requires careful coordination. The notice must be valid, the assignment documentation must be completed correctly, and the sale contract needs to reflect who pays the premium and costs. Both joint owners must be aligned, as they will be involved in the sale and in assigning the claim.
A practical checklist before joint owners extend a lease
Before speaking to the freeholder or serving a notice, make sure you have a clear picture of the ownership and the lease. Confirm the names on the Land Registry title and lease, the remaining term, any mortgage lender, and whether both owners are willing and able to proceed.
You should also agree how the premium, valuation, legal fees and landlord’s recoverable costs will be funded. Joint ownership does not automatically mean costs must be split equally. That is a private arrangement between the owners, but settling it early avoids friction later.
Finally, obtain an informed valuation. This gives both owners a credible basis for deciding whether to proceed and prevents the process becoming an argument based on estimates or assumptions.
Leasehold reform and joint owners
The Leasehold and Freehold Reform Act 2024 is intended to change parts of the leasehold system, including lease extension rights and costs. Not every measure takes effect immediately, and implementation dates and detailed rules matter. Until changes are fully in force, joint owners should make decisions using the law that applies at the point they act rather than waiting on headlines alone.
For some owners, waiting may be sensible. For others, particularly those approaching 80 years or preparing to sell, delay can be the more expensive choice. A review of the current lease position is the best way to make that judgement with confidence.
Joint ownership adds a layer of coordination, but it does not take away your ability to protect the flat. Get the owners, valuation, lender and legal process lined up early, and a lease extension becomes a manageable property decision rather than a last-minute obstacle.
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