If the landlord does not stick to the terms of the rental agreement or meet the requirements of the Virginia Residential Landlord Tenant Act (VRLTA) that affect your health or safety, you may serve a written notice on the landlord. The written notice must specify the problem and say that the lease will end 30 days after the landlord receives this letter if the problem is not dealt with in 21 days.
This section of the VRLTA also tells you what you can do if the landlord breaks the lease agreement more than once. It tells you what to do if the landlord cannot fix the problem that his violation of the agreement caused.
See VRLTA Section 55-248.21