The landlord must follow all applicable building, housing and health codes and statutes. This usually means keeping roofs, windows, screens, doors, floors, steps, porches, exterior walls, foundations, and structural components in good repair and the plumbing in reasonable working condition. Unless otherwise agreed in writing, for any rental other than a single family house or duplex, the landlord also must provide for locks and keys, the clean and safe condition of common areas, removal of garbage and provide garbage receptacles, extermination of rodents, roaches, ants and termites, functioning facilities for heat during winter, hot water and running water. The tenant may be charged for utilities, water, fuel and garbage removal (§ 83.51, Fla. Stat.).