What kinds of buildings are good to convert?

What kinds of buildings are good to convert?

Lisa Andrews (Horticulturalist) gives expert video advice on: Where can I build a roof terrace?; What kinds of buildings are good to convert?; Can I convert a slanted roof to a roof terrace?

You can convert office buildings, private apartments, any buildings that have no access to outside space, and it gives people some amenable, usable space.