Cal. CIV § 930

(a) The time periods and all other requirements in this chapter are to be strictly construed, and, unless extended by the mutual agreement of the parties in accordance with this chapter, shall govern the rights and obligations under this title. If a builder fails to act in accordance with this section within the timeframes mandated, unless extended by the mutual agreement of the parties as evidenced by a postclaim written confirmation by the affected homeowner demonstrating that he or she has knowingly and voluntarily extended the statutory timeframe, the claimant may proceed with filing an action. If this occurs, the standards of the other chapters of this title shall continue to apply to the action.

(b) If the claimant does not conform with the requirements of this chapter, the builder may bring a motion to stay any subsequent court action or other proceeding until the requirements of this chapter have been satisfied. The court, in its discretion, may award the prevailing party on such a motion, his or her attorney’s fees and costs in bringing or opposing the motion.