That's a pretty small lot, but hey, it's perfect when it's yours. Now, the building part is easy, it's navigating the bureaucracy that's hard. You may be ready to build but there's paperwork first. You'll need a set of professional plans drawn up to submit with your building permit application, and that's just the beginning. If I were you I'd make a stop at city hall for a building 'packet'. It should includes all forms, instructions, and requirements, one stop shopping. You must be very excited - have fun, too.