Minimum lot size for zoning

[Kajal Aggarwal]

Hi,

We recently saw a property with a lot size of 6,600sq ft but is zoned R3. It has a 1200sq ft house in the front and 730sq ft work shed with a garage in the back which the current owner has grandfathered. According to the new zoning requirements, R3 should have atleast 10,000sq ft otherwise R3 reverts to R2. But R2 requires atleast 7000sq ft otherwise it reverts to R1. So now this property is considered as R1 and only a SFH is allowed. But the recent laws in California legalized additional dwelling unit (ADU).

Does the shed qualify as an existing living unit? Also, it is very close to the back of the house. Any idea on the maximum square footage that can be added to an ADU?

Thanks,

Kajal