Would seco.nd a lot of the good advice on here about buying a flat. Definitely would concur about more problems likely regarding maintenance in non-purpose bulds.
I really do not understand the 80 years thing with leases. One of the flats I was looking at had just over this and my Solicitor strongly advised me against buying it, as it might be more difficult for my children eventually to sell in ten or so years time. WHY???
I always always asked the cost of the current Maintenance/Service Charge when viewing a flat. The block I moved into (25 flats), runs their own M,co. and all own our leases (so no ground rent). As the Mco is run entirely by volunteers, it keeps costs down considerably. (I am now the Secretary of this)!!!
Further things to check on could be to find out what is the policy regarding flats being let out) If a large number of the flats are rental it could be difficult at all sorts of levels. Also, are pets permitted, is there a lower age limit on who lives in them (do you really want to have noisy children/teenagers - no matter how well behaved, running around in the building? Parking facilities both for yourself, visitors and workmen.
No problems with noise in my flats, they are very solidly built and faced with Weston stone. When you view, check how clean and well maintained are all the public areas.
This can give you some insight into how good are the Mco.
And, flats or houses, or bungalows - other similar rules should be taken into consideration - such as how close is the public transport, medical facilities (GP, Pharmacy, Dentist, Optician). As we are ageing, may wish take into account how wide are doorways (would they be able to accommodate a wheelchair, etc). I would say to beware of any apartment that needs to be sold via the MCo or similar. Many Retirement Flats have this rule and also have a list of tradesmen who are the only ones permitted to do any work in each flat.
As with all property, legislation is constantly changing, and flats in that way are no different to any other properties. The more we know the better position we are in. Communal gardens for an Apartment block may sound wonderful - but are often one of the most expensive items to maintain. Often have very little use,- we do not have this, but our local, beautifully maintained by volunteers local park is five minutes away.