Youa re correct in stating that the useful life of carpet is only about 7 to 10 years, but unfortunately absent a local rent control ordinance providing something to the contrary, your are NOT entitled to new carpet. Under California law, a landlord is only required to replace or repair carpet that is torn, or provides a tripping hazard.
Disclaimer. Ms. Marsh is an attorney licensed to practice in California. The information posted above is for general information, does not constitute professional legal advice, and does not create an attorney client relationship. Ms. Marsh strongly advises the questioner to consult with an attorney to thoroughly review his or her particular circumstances and for advice tailored to his or her specific circumstances.