How United Build Partners helps Chino homeowners
We're not a construction company. United Build Partners is an ADU advisory and contractor-matching service: we start with a free review of your property and goals, help you understand what's realistic for your lot under Chino's rules, and — when it's a good fit — connect you with up to three contractors in our network suited to your project type and neighborhood. From there, you compare proposals and decide who to work with; the licensed contractor you choose handles the actual design and construction.
ADU rules and permitting in Chino
Like every California city, Chino's ADU rules build on the statewide floor — ministerial review and a 60-day clock on complete applications (our California ADU laws guide covers the framework). Locally, ADU standards were adopted by ordinance and the Planning Division publishes concrete process figures most cities keep vague.
What's specific to Chino
- A published, flat plan-review fee. Chino states an ADU plan-review fee of $452 and a review time of 7 to 10 business days — specific numbers that make budgeting and scheduling easier than in cities that quote neither.
- ADUs on single-family and multifamily lots. ADUs may be permitted on residential lots with an existing or proposed single-family or multifamily dwelling — attached, within, or detached. One ADU plus one JADU is allowed per lot with a single-family residence.
- JADU rules follow state law tightly. A Junior ADU must be 500 sq ft or less, entirely within the existing single-family residence, and only within the primary dwelling's footprint or an attached garage — not a detached accessory structure.
- A fire-district review step. ADU plans route through the Chino Valley Fire District's submittal process in addition to city plan review — an extra reviewer in the chain worth accounting for in your timeline.
- Codified ADU standards. Chino's ADU regulations sit in its municipal code (adopted via Ordinance 2019-007 and updated since) — the authoritative reference beyond the counter summary. Confirm current standards with Planning at 909-334-3253.
Property and lot considerations
Chino sits in the agricultural-heritage southwest corner of San Bernardino County — historically the Chino dairy preserve — now a mix of established neighborhoods and large newer master-planned developments (notably The Preserve), many under HOAs. Two practical consequences: newer-tract homeowners should read our HOA guide before designing, since association review is common here; and larger lots in the older areas often have genuine room for a detached unit. Flat terrain keeps site work predictable — utility routing and lot coverage are usually the deciding questions.
Common ADU types for Chino homeowners
Chino's mix of larger established lots and newer tracts makes the detached ADU a common conversation, with garage conversions strong where an existing garage can be reused. A Junior ADU suits larger single-family homes, and multifamily-lot owners have their own path under state multifamily ADU law.
Cost factors in Chino
Inland Empire pricing generally runs below the coastal counties, and Chino's flat lots help keep site work predictable. The published $452 review fee is a known quantity; budget the fire-district review and any HOA-driven design requirements early. Anchor against our cost guide and soft-cost categories, then confirm current fees with the city.
Financing your Chino ADU
Most homeowners fund ADU construction through a HELOC, cash-out refinance, a construction loan, or some combination — see our ADU financing overview and loan payment calculator for how each works. Financing options aren't generally city-specific, but a lender may consider your neighborhood and local rents when evaluating projected rental income as qualifying income.
How our process works
Frequently asked questions
The city states a flat ADU plan-review fee of $452, with a review time of 7 to 10 business days — unusually specific figures. This is the plan-review fee only; permit, impact, and utility costs are separate. Confirm current figures with Planning at 909-334-3253.
Yes — Chino permits ADUs on residential lots with an existing or proposed single-family or multifamily dwelling. A single-family lot allows one ADU plus one JADU; multifamily properties follow their own allowances under state law.
ADU plans route through the Chino Valley Fire District's submittal process alongside city plan review. Factor that extra review step into your timeline, especially for detached units; the city and fire district can confirm what applies to your project.