There's some steps you should take before you start any building or renovation project, to avoid problems and unforeseen costs down the road.
Have a conversation with your local government to make sure that your proposed building or renovation will meet zoning and building requirements.
Depending on the size and intended use of your proposed project, you may need permits from your local government.
If the scope of your proposed building or renovation is outside your expertise, consider talking to a range of professionals in your area who can provide advice. These include general contractors, architects, engineers, electricians and plumbers.