Mid-century lots
Lincoln Village homes from the 1950s and 1960s often have back yards deep enough for a detached unit.
Older utilities
Original electrical panels and sewer laterals often need work for a second unit.
Related
Is your lot ready for an ADU?
Send your address and a sentence about what you want. We look up the zoning, setbacks and utility routes and reply with the ADU types that fit.
We build in Stockton, CA.