ADUs in Chula Vista, CA
✓ Verified November 1, 2026 Rules, fees, and timelines below were verified November 1, 2026. Anything marked “confirm” or “to verify” is still open.
AB 956 allows two detached ADUs per single-family lot, and bars HOAs from blocking state-compliant ADUs. Watch how Chula Vista applies the 800 sq ft cap on the second unit — to confirm.
A mailing address that says “Chula Vista” does not guarantee the parcel is under City of Chula Vista rules — some parcels fall under County rules. Confirm jurisdiction before relying on anything on this page.
The City of Chula Vista repealed its local ADU ordinance (Ordinance 3592, 2025) and defers to state law. Development Services is at 276 Fourth Ave, Building B.
Does it apply to my lot? — address check
Enter a San Diego County street address. The checker geocodes it and checks public transit stops nearby. Privacy: your typed address goes directly from your browser to OpenStreetMap's free Nominatim geocoder and the public SanGIS transit-stops layer. It never touches an ADUKey server — ADUKey has no server endpoint for this, so there is nothing to send it to.
Parking-exemption rule: no parking required within a 1/2-mile walking distance of public transit (bus stops included). Straight-line distance is measured first: a straight-line miss is definitive, a straight-line hit is provisional until the walking route is checked.
What you can build
| Rule | What applies | Note |
|---|---|---|
| Detached ADU size | Up to 1,200 sq ft | |
| Detached ADU height | 16 ft (18 ft near major transit or on a multifamily lot) | |
| Side / rear setbacks | 4 ft | |
| State guarantee | At least 800 sq ft / 16 ft, per state law | |
| Attached ADU size | Greater of 50% of the primary dwelling, or 850 sq ft (1 bedroom) / 1,000 sq ft (2+ bedrooms) | |
| Junior ADU (JADU) | Up to 500 sq ft, inside the home | Owner-occupancy applies to JADUs, with an exception if the JADU has its own bathroom — confirm. |
| Parking | None required within a 1/2-mile WALKING distance of public transit (bus stops included), or for conversions of existing space | Use the address checker below; a straight-line hit is provisional until the walking route is checked. |
| Minimum rental term | 30 days | |
| Impact fees | Exempt for ADUs under 750 sq ft | |
| Overlays to check | Hillside soils review in the east; Bayfront coastal area needs a Coastal Development Permit | Confirm overlay status with Development Services. |
Permit path
- Confirm jurisdiction and overlays. Use the address checker below, then confirm coastal and hillside status with Development Services.
- Pick a path: a City Standard Plan (below) or a custom design.
- Submit. Plan review runs about 14–21 business days per builder guides; the standard-plan track is 14 business days (see conditions below).
- Decision. Ministerial decision within 60 days.
- Build. About 10–12 months, per builder guides.
City Standard Plans — free, and the fastest track
Download them at chulavistaca.gov/adus (City Standard ADU Plans). There are 12 options: 6 sizes (498, 748, 749 rectangular, 749 L-shape, 999, and 1,199 sq ft), 1–3 bedrooms, each also available mirrored.
Review: 14 business days. Plan review fees: $3,951 vs $4,963 (about $1,000 lower on the standard-plan track).
Conditions: you must contract with the plan's designer, sign a hold-harmless agreement and affidavit, and add site-specific engineering. The plans are about 85% complete; the rest is project-specific.
Caveat: the posted plan sets may predate the 2025 California Building Code cycle in force since January 1, 2026. Confirm with Development Services before relying on the 14-day track.
What it costs (county range, not Chula Vista data)
Cost band $300,000–$450,000+ is a San Diego County range, not verified Chula Vista data. Use the calculator below with your own numbers.
Rent calculator
Defaults below are EXAMPLES — editable placeholders, not verified local rent or cost data. Type your own numbers.
Verified builders in San Diego County
One metro-level profile per builder, linked from every city page they serve. Profiles are never duplicated per city, so a correction lands everywhere at once.
Frequently asked questions
Do I need parking for an ADU in Chula Vista?
No parking is required if the lot is within a 1/2-mile walking distance of public transit (bus stops included), or if the ADU is a conversion of existing space. Use the address checker on this page; a straight-line hit is provisional until the walking route is confirmed.
How big can a detached ADU be in Chula Vista?
Up to 1,200 sq ft, 16 ft high (18 ft near major transit or on a multifamily lot), with 4 ft side and rear setbacks. State law guarantees at least 800 sq ft and 16 ft.
Does Chula Vista offer pre-approved ADU plans?
Yes — 12 City Standard ADU Plans (6 sizes from 498 to 1,199 sq ft, 1–3 bedrooms, each also mirrored), free to download at chulavistaca.gov/adus, with a 14-business-day review track. You must contract with the plan's designer and add site-specific engineering.
Does the owner have to live on the property?
Not for a standard ADU. Owner-occupancy applies to junior ADUs (JADUs), with an exception if the JADU has its own bathroom — confirm that exception with Development Services.
Sources
- City of Chula Vista Development Services, 276 Fourth Ave, Building B
- City Standard ADU Plans — chulavistaca.gov/adus
- Ordinance 3592 (2025) — local ADU ordinance repealed; city defers to state law
- Builder guides — plan review and build timelines
Not legal advice. This page is a starting point, not a parcel approval. Confirm your lot with the city before you build, buy, or sign anything.
Report an outdated rule
Rules change. If something on this page no longer matches the city's current rules, tell us what changed and where you saw it. Reporting is not wired to a destination yet — your note stays on this page and is not sent anywhere.