For landowners

What could your land return?

Under a joint-development agreement you put in the land and receive an agreed share of the finished flats and parking; as each flat is sold and registered, its buyer normally receives a proportionate undivided share of the land under the building, on the terms your agreement and the deeds set. Enter your plot size to see the rough shape of that deal — buildable area, your share of it, and what that share might be worth.