If you’re planning to extend the lease on your flat, one of the first questions you’ll want answered is a simple one: how long is this going to take? It’s an important thing to know, because a lease loses value the longer you leave it — and the process itself has a few fixed stages that can’t be rushed.
The honest answer is that it depends on the route you take and how cooperative your freeholder is. But there’s a clear typical range, and understanding the steps involved will tell you what to expect. Here’s how the lease extension process actually unfolds.
The short answer
Most lease extensions take somewhere between three and twelve months from start to finish. A straightforward statutory extension with a responsive freeholder often completes in around three to six months, while a more complex case — a disputed premium, an absent freeholder, or one that ends up at tribunal — can take six to twelve months or longer.
Two routes, two timelines
There are two ways to extend a lease, and they run to very different timetables.
The statutory (formal) route follows a legal procedure set out in the Leasehold Reform, Housing and Urban Development Act 1993. It has fixed time limits that keep things moving and give you the protection of a tribunal if you can’t agree terms. It’s the recommended route for most leaseholders.
The informal (voluntary) route means negotiating directly with your freeholder without serving a formal notice. If your freeholder is cooperative and reasonable, this can be quicker — but there’s no statutory timetable and no tribunal to fall back on, so it can just as easily stall or fall through.
The statutory process step by step
Here’s how the formal timeline typically breaks down:
- Valuation and preparation (around 2–4 weeks). You instruct a RICS surveyor to value the extension premium and a solicitor to handle the legal side. Gathering your lease and title documents happens here too.
- Serving the Section 42 notice. Your solicitor serves a formal notice on the freeholder setting out your claim and proposed premium. This is the moment the statutory clock starts.
- The freeholder’s counter-notice (at least 2 months). The freeholder must respond by a date stated in your notice, which has to be at least two months away. They’ll usually accept your right to extend but counter your proposed premium.
- Negotiation (around 1–6 months). The two sides’ surveyors negotiate to agree a premium. Most cases settle here, and how long it takes depends largely on how far apart the opening figures are.
- Tribunal, if needed (adds several months). If you can’t agree, either party can apply to the First-tier Tribunal (Property Chamber) for a binding decision — but only between two and six months after the counter-notice. Reaching a hearing adds time, though the vast majority of claims settle before this stage.
- Completion (a few weeks). Once the premium is agreed or determined, the new lease is finalised and completed.
What affects how long it takes
Several things can speed the process up or slow it down:
- How responsive your freeholder is — the single biggest variable.
- Whether the premium is disputed, and how far apart the valuations are.
- Whether the freeholder is absent or can’t be traced, which means applying to court for a vesting order and adds significant time.
- The complexity of the lease and how quickly documents are produced.
- The responsiveness of the solicitors and surveyors on both sides.
Starting early — before your lease approaches the critical 80-year mark — also helps you avoid unnecessary time pressure and cost.
An important recent change
It’s worth knowing that lease extension law is changing. As of 31 January 2025, the old requirement to have owned your property for two years before you could extend was abolished — so you can now begin the process from day one of ownership, which removes a common source of delay.
Further reforms under the Leasehold and Freehold Reform Act 2024 — including a longer 990-year extension term and the removal of “marriage value” — have been passed but are not yet in force, as they await additional legislation expected to progress through 2026 and beyond. For now, extensions still follow the existing framework, so it’s wise to take current professional advice before you begin.
Getting started
The best way to keep your lease extension on track is to prepare well and instruct experienced professionals from the outset. A clear, well-supported valuation makes negotiations faster and smoother, and gives you a strong position from the very first notice.
At Taylor Chartered Surveyors, our RICS registered valuers provide expert lease extension valuations across London and the South East, guiding you through each stage and negotiating on your behalf. If you’d also like a sense of the likely premium, our guide to how much a lease extension costs explains what to expect. Get in touch for advice tailored to your lease.
Frequently asked questions
How long does a lease extension take on average?
Most take three to twelve months. A straightforward statutory extension with a cooperative freeholder usually completes in around three to six months, while disputed cases or those going to tribunal take longer.
Can a lease extension be done quickly? The informal route can be faster if your freeholder agrees terms readily, but it offers no statutory protection. The formal route has fixed timescales that, while not the fastest, keep the process moving and give you a tribunal backstop.
What causes the biggest delays? An unresponsive or untraceable freeholder, and disagreements over the premium, are the most common causes of delay. Instructing an experienced surveyor and solicitor early helps keep things on schedule.