1-Sign that most papers have been legalised for you to have an approved building plan, especially in Lagos where you must have your C of O or governor’s consent, your survey is also registered with the government. Hence you are sure that lots of legal works have been covered for you, of course you can spend a whole year processing these documents.

2-Time is also a big factor, you can move to site and start working the very day you buy the land. This will help to reduce and save time if you want to start immediately.

3-Authentication of plan- Approved plan is a pseudo authentication of your plan to meet up with basic standard. For a fresh design that needs to go through the process of approval, the plan may be rejected if you aren’t meeting up with their regulations, but in this case that has been taken care of, so you have more time to engage in other tasks.



http://buildingcontractorsecrets.com/2015/04/benefits-of-buying-an-approved-building-plan-land-from-a-developer/