Effective waterproofing and weather protection of roof and exterior walls, including unbroken windows and doors
Keeping plumbing or gas facilities in good working order
A water supply capable of producing hot and cold running water to appropriate fixtures and connected to a sewage disposal system
Maintaining heating facilities in good working order
Keeping electrical lighting and wiring in good working order
Sanitary building and grounds free from debris, filth, rodents, cockroaches, etc.
Adequate garbage receptacles
Keeping floors, stairways, and railings in good repair
Providing reasonable notice (usually 24 hours) to enter your apartment, unless there is an emergency
Repairs to property:
If you need to request a repair from your landlord or property manager, write a signed, dated memo or formal letter, and keep a copy for your records.
Your landlord has a reasonable time to correct the problem (reasonable response time will differ depending on the nature of the repair).
If your landlord neglects or refuses to make the repair within a reasonable time, you have a legal right to get the repair done and deduct the cost from the cost of your rent. This procedure may be used twice in any 12-month period. The cost of the repair must not exceed one month's rent.
If your own efforts to get repairs are not effective, try contacting the Building Inspection Department of your city.
If you've contacted the Building Inspection Department and your landlord still refuses or neglects to make repairs, you have the right to withhold rent payments. But be careful: the seriousness and duration of the violation are relevant factors. For example, a leaking roof during a rainy season would be considered a violation, but a few ants after the rain would not.