There is quite a bit going on here. Have a local landlord/tenant lawyer look over your lease. LL cannot provide false information to induce you to sign the lease agreement. That may be a way to break your lease.
-Michael R. Juarez Law Office of Juarez and Schaeffer PO Box 16216 San Diego, CA 92105 (619) 804-4327 www.jslaw.org Mike@jslaw.org This posting is provided for “information purposes” only and should not be relied upon as "legal advice." Nothing transmitted from this posting constitutes the establishment of an attorney-client relationship. Applicability of the legal principles discussed here may differ substantially in individual situations or in different jurisdictions.
A lawyer would really need to review the lease and ALL exhibits first to determine what rights and remedies you have at this point against the landlord, the contractor or both.
As the other contributors have stated, the first step toward seeing what your options are is to review the lease agreement. It would be wise to contact a landlord/tenant attorney who can take a look at it, sooner rather than later, considering the lease kicked in on November 1st. Best of luck!