California · Merced
In Gustine you can build a detached ADU up to 800 sq ft guaranteed (1200 sq ft ceiling), 16 ft tall, set back 4 ft from side and rear property lines. Owner-occupancy is not required. Parking is capped at 1 space and is waived entirely in six situations, including within half a mile of transit.
Gov. Code §§ 66310–66342 · 38 of 51 fields checked against statute textWhat state law guarantees for an ADU in Gustine, with the governing code section behind every number.
Not determined
All 2 of them, word for word. Nothing here is paraphrased, because paraphrasing a legal requirement is how error gets in.
All 51 fields via API · 38 verified against statute text
We do not have a state review on file for Gustine, so the numbers below are the statewide minimums. Your city may allow more than this, but it cannot allow less.
What you can build. You can build a separate building in the yard, an addition attached to your house, or a conversion of space you already have, like a garage.
How many. On a normal single-family lot you can have 1 ADU, plus 1 "junior" ADU, which is a small unit carved out of the existing house.
How big. The city has to let you build at least 800 square feet. If you want two or more bedrooms, it has to allow up to 1000 square feet. For reference, 800 sq ft is roughly a one-bedroom apartment, about the size of a two-car garage.
How close to the property line. You need to leave 4 feet on the sides and 4 at the back. That is measured from your property line, not from the fence, and those are not always in the same place. If you are converting a garage that already sits closer than that, you can generally keep it where it is.
How tall. Up to 16 feet, which is a single storey with a normal roof. If your lot is within a half mile walk of a major transit stop, you get 18 feet instead.
Parking. You may need to add 1 parking space, but there are a lot of exemptions. The big one: if you are within a half mile walk of public transit, no parking is required. And if you convert your garage, nobody can make you rebuild the parking you lost.
4 feet from the side and rear property lines (Gov. Code s 66323(a)(2)). No setback at all is required if you convert an existing structure such as a garage that already sits closer (Gov. Code § 66314(a)(7)).
16 feet for a detached ADU (Gov. Code s 66321(b)(4)(A)), rising to 18 feet within half a mile walking distance of a major transit stop, plus 2 more feet to match the roof pitch of the main house. Attached ADUs may reach 25 feet or the primary dwelling's limit, whichever is lower.
No. California bars a local agency from imposing an owner-occupant requirement on an ADU (Gov. Code s 66315). A junior ADU is different: owner-occupancy can still be required there.
At most one space (Gov. Code s 66314(d)(10)(A)), and six statutory exemptions remove it entirely, including within half a mile walking distance of public transit, within a historic district, or with a car share vehicle within one block (Gov. Code § 66322(a)). Converting a garage never obliges you to replace the lost parking.
No. Rentals shorter than 30 days are barred, and for units approved on the by-right track that bar is mandatory rather than optional (Gov. Code § 66323(e)).
The state has not published a determination on Gustine's own ordinance. It has on 1 jurisdiction nearby, and because ADU practice and the contractors themselves work across city lines, that is worth knowing before you start.
Rather than list contractors we cannot evidence, this stays empty until Gustine publishes permit records naming them or licence matching reaches the city. The cities already covered show how the ordering works, and whichever contractor you use, the rules above are the ones that govern the job.