Commitments and Contingencies Commitments and contingencies include typical obligations of homebuilders for the completion of contracts and those incurred in the ordinary course of business. Warranty. We provide a limited warranty on all of our homes. The specific terms and conditions of our limited warranty program vary depending upon the markets in which we do business. We generally provide a structural warranty of 10 years , a warranty on electrical, heating, cooling, plumbing and certain other building systems each varying from two to five years based on geographic market and state law, and a warranty of one year for other components of the home. Our limited warranty program is ordinarily how we respond to and account for homeowners requests to local division offices seeking repairs of certain conditions or defects, including claims where we could have liability under applicable state statutes or tort law for a defective condition in or damages to a home. Our warranty liability covers our costs of repairs associated with homeowner claims made under our limited warranty program. These claims are generally made directly by a homeowner and involve their individual home. We estimate the costs that may be incurred under each limited warranty and record a liability in the amount of such costs at the time the revenue associated with the sale of each home is recognized. Our primary assumption in estimating the amounts we accrue for warranty costs is that historical claims experience is a strong indicator of future claims experience. Factors that affect our warranty liability include the number of homes delivered, historical and anticipated rates of warranty claims, and cost per claim. We periodically assess the adequacy of our accrued warranty liability , which is included in accrued expenses and other liabilities in our consolidated balance sheets, and adjust the amount as necessary based on our assessment. Our assessment includes the review of our actual warranty costs incurred to identify trends and changes in ou