If you are looking to buy land for development, then you need to be aware of any restrictions or issues that may affect the land before you purchase it.
These can be things like:
Access problems, restrictive covenants or historic rights-of-way that the land is subject to, or it could be related to the condition of the land, e.g. making sure the land is not affected by flooding or is contaminated, all of which can affect the viability of the development.
You should also make detailed enquiries as to whether planning permission will be granted for your proposed development and be aware of any restrictions that could result in planning permission being denied.
Local councils have local plans which dictate a range of uses and preferences for land development and you need to be sure that your intended use fits into this plan.