Actually, in Westchester, building permits are issued by the Town. Some towns are more difficult than others regarding expediency and requirements.
I can tell you one thing - MAKE SURE you have a LOCAL contractor of your own look at it. Sounds like the seller has something to hide...
Are you working with a realtor? They should be giving you advice on this.
It's common to put money in escrow in situations like this - ask your realtor or attorney about it.
Welcome to the neighborhood.
