Many Massachusetts landlords are unaware that before charging tenants for hot water and sewer service, they must comply with the numerous requirements of the Massachusetts Water Sewer Sub-Metering Law. These requirements include having separate water meters for each unit, installation of low flow faucets and toilets by a licensed plumber, and certification with the local health board, among other requirements outlined below. Non-compliance with this law may result in a three month rent penalty to the landlord plus payment of the tenant's attorneys fees.
Massachusetts landlords must help the tenant maintain 64 to 68 °F from September 15 to June 15 under the Massachusetts heat laws. Massachusetts apartment heating laws are specified in the State Sanitary Code, officially 105 CMR 410 The Minimum Standards of Fitness for Human Habitation. This regulation has the force of law and governs all things apartment, including winter heating requirements.