Can I use the free regional plans in Riverbank?
Yes. Riverbank was one of the cities that developed the pre-drawn detached ADU plans with Stanislaus County, according to the City of Modesto and the City of Turlock, and the county lists Riverbank among its current partners as of October 2026. The plans are free to property owners.
Who issues the permit?
The City of Riverbank, for parcels in city limits. Land just outside town is unincorporated county, where Stanislaus County issues permits. We confirm which one applies before drawing anything.
Which state rules apply?
- A converted ADU, a new detached ADU of up to 800 sq ft and a junior ADU can share a single-family lot.
- New detached units get 4-foot side and rear setbacks.
- Parking lost to a garage conversion does not have to be replaced.
- No impact fees on a unit of 750 sq ft or less.
- A decision within 60 days of a complete application, with no hearing.
What usually matters on a Riverbank lot?
- Jurisdiction. City or county changes the counter, not the state rules.
- Plan fit. The regional sizes run from a small studio to three bedrooms.
- Local standards. Riverbank's own code adds objective standards; we read the current version for your parcel.
Which ADU type fits a Riverbank home?
It depends on the garage and the yard. A deep, open rear yard suits a regional plan; a sound detached garage may be cheaper to convert. We price the options side by side.
Related
As of October 2026. Sources: Stanislaus County ADU page; City of Turlock ADU Pre-Drawn Plans page; City of Modesto news release (March 7, 2025); Government Code §§66311.5, 66314, 66317 and 66323.
Find out what your Riverbank lot allows
Share your Riverbank address. We confirm jurisdiction and check the plan sizes against your yard.