California recently adopted several laws that aim to ease the production of second units. The more important changes are that any single-family lot can now have an attached and detached second unit; second units that are less than 750 square feet are exempt from impact fees; and local jurisdictions will have 60 days to approve the permits. There are many more changes in these bills that are summarized here. The legislature also adopted a second unit amnesty law but its implementation impact is still unclear. The law establishes that for any second unit built before January 1, 2020, that receives a notice of violation, the owner may request a 5-year delay in enforcement as long as the enforcement agency determines that the violation is not a threat to the health and safety of the tenants. San Mateo County already has a second unit amnesty program in place for residents living in the unincorporated areas.