Chula Vista issues its own ADU permits and, as of October 2026, offers a set of pre-approved ADU plans in sizes from about 498 to 1,199 sq ft. State ADU law applies citywide, and in HOA neighborhoods state law also limits how far an association can restrict an ADU.
Does Chula Vista have pre-approved ADU plans?
Yes. As of October 2026, the city's pre-approved ADU plans page lists 12 options, with flipped versions of each layout, in sizes including 498, 748, 749, 999 and 1,199 sq ft and one to three bedrooms. Some customization is allowed, such as larger bedrooms or a different kitchen layout. The city requires a signed hold harmless agreement and affidavit with the plans.
How do west and east Chula Vista differ for an ADU?
Older neighborhoods on the west side often have deeper lots and detached garages near the alley or rear line, which can suit a garage conversion or a backyard unit. Eastern Chula Vista has many newer homes on tighter lots with attached garages, where a junior ADU, an attached ADU or a compact detached unit tends to fit better.
Can my HOA block an ADU?
Not outright. As of October 2026, the HCD Handbook notes that Civil Code sections 714.3 and 4751 void covenants that effectively prohibit or unreasonably restrict ADUs or junior ADUs on single-family lots. An HOA can still apply reasonable rules, such as design review, so we build its process into the schedule.
What does a Chula Vista ADU depend on?
- Lot size and where the main home sits on it.
- Whether a pre-approved plan fits the yard as drawn.
- HOA architectural review, where it applies.
- Sewer and electrical capacity at the back of the lot.
- Impact fees for units over 750 sq ft; smaller units are exempt under state law.
Not sure which unit fits your Chula Vista lot? Read garage conversion or new build.