Does a lease have to be fully executed by both parties and delivered before it is binding?

Question Details:

I recently signed a lease for a duplex while it was being remodeled. It was supposed to be ready 12/01, however the lease said 12/15. On 01/04 the landlord said it was ready for me to move into and it wasn't. It was still dirty and had construction tools inside. He never gave me a signed copy of the lease and on 01/05 I gave him a letter stating that I was withdrawing my offer to lease the space and wanted my money back (security deposits and prepaid rent.) He says no and he's going to sue me. I offered to sign a new lease when he has properly completed the space; he said no. Important Notice