Construction Co. is not bonded, insured or licensed to do work. Owner thinks he has upper knowledge on construction work yet fails to abide by simple logic. Such as not abiding by contract, taking longer to complete the job than promised. Poor workmanship in all areas he was responsible for.
Do not hire this contractor unless he can provide up to date papers of his insurance, qualifications, licensing, registration with plumbing inspector etc. Research thoroughly before hiring any contractor, it will save you stress down the path of remodeling.