@justwhy2022 I had a leasehold flat for seven years and no issue with it at all. Maintenance was well managed, our service fees didn’t go up, my neighbours were lovely. MN seems to strongly dislike flats, but I had no problems at all.
That said, I did get the lease extended when I bought, as part of the process. If the current owner has lived there for more than two years, they’ll have the legal right to extend the leasehold - you won’t, necessarily. We tied this in with the purchase, and it took about two months for it all to go through. It was then boosted to 99 years when I took over, and I sold it with 92 years remaining. That would be my preferred option - it’s much easier.
If the current sellers won’t do it and you don’t want to, you’ll need to look at options. It sounds like your mortgage company will lend but subject to the lease being extended - will they need that process to have started to lend? If not, what timescale are they giving you to extend - 6 months, a year?
You need a binding agreement from the leaseholder (who may or may not be the management company) about what it would cost you to extend. Not the current owner, as they don’t need to give you the same offer. £9k seems low, even with no ground rent due - marriage value is usually linked to the value of the flat. For reference, a flat in my old house was for sale when we sold - it had 65 years remaining, and the estate agent listing says it’ll cost in the region of £25k to extend. We’re not in London, and ground rent was £80 a year.
Was the flat initially advertised as a leasehold of 99 years starting in XXXX year; or did they advertise it as a remaining lease of 99 years and then correct themselves? I’d go through the flat management info with a fine toothed comb if they got this wrong…
But like I said, I had a lovely experience in my flat, so I wouldn’t write off flare overall. Just make sure this one can work for you.