Commencement of Work - Start the Job

All home improvement contracts must include:

the approximate dates on which construction is to begin;

the approximate dates on which all construction is to be completed (not number of working days);

what constitutes substantial commencement of the work; and

a notice that failure of the contractor without lawful excuse to substantially commence work within 20 days from the approximate date specified in the contract when work will begin is a violation of Business and Professions Code section 7159

Approximate Work Duration

The dates need to be approximate only, since external factors such as the weather, or the availability of supplies might cause delays.