Buy a copy of the zoning ordinance. If they don't sell them, ask them to make you a copy of the original. I have had zoning office employees tell me it would be expensive. Asked how expensive, they said ten cents a page. I asked how many pages it would be. When they told me twenty pages, I told them I could afford the two dollars. Zoning boards often hate to give you information you need. Don't let them get away with it. I have gotten zoning maps and full copies of zoning ordinances everywhere I rented or owned property. They work for you, even though they think they don't.