A requirement is not a single number. It is a coordinated set of use, size, placement, access, design, utility, parking, fire, historic-resource, and documentation questions.
The summary below is a planning aid, not a substitute for a property-specific interpretation from Anaheim Planning and Building staff. The municipal code is the controlling local source and can change.
Primary source: Anaheim Municipal Code §18.38.015, 2026 S-28 current when reviewed ↗
01 · Read categories together
What the current code asks you to coordinate
Rules differ for an ADU inside existing space, new attached or detached construction, a JADU, and multifamily properties. Confirm which category describes the proposal.
The current table distinguishes JADUs, ADUs up to 800 square feet, and ADUs above 800 square feet. Maximums and underlying-zone rules depend on type.
The current code table identifies four-foot side and rear structural setbacks for specified ADU categories, with front-yard and conversion qualifications. Detached projects also require attention to building separation.
Independent exterior access, privacy, emergency access, architecture, historic status, and the relationship to the main dwelling can affect the drawing set.
As reviewed, the code lists a detached maximum of 1,200 square feet subject to its cross-referenced provisions and a 10-foot separation between a detached ADU and main dwelling. Do not apply either number without reading the table notes and current code.
02 · Complete is a defined milestone
Review timing starts with a complete package
Business days for completeness
The current municipal code states that the City determines whether an ADU or JADU application is complete within 15 business days. An incomplete response identifies missing items and how to complete them.
Business days for resubmittals
The same completeness-review period applies to resubmittals under the current code. That makes a coordinated response set more useful than isolated corrections.
Days after completeness
Once the application and evidence are deemed complete, the current code provides for approval or denial within 60 days, subject to the qualifications stated in the code.
Timing source: §18.38.015.150 Decision ↗. These are review rules, not a promise of a construction start date.
03 · Before upload
Build the standard submittal around dependencies
- Use the City checklist to identify the current plan, application, and supporting-document expectations.
- Resolve sewer capacity verification and show a credible connection concept.
- Coordinate an electrical meter spot where the chosen scope and City or utility process requires it.
- Request the new address and keep it consistent across the package when applicable.
- Prepare the required recorded covenant when a JADU is proposed.
- Identify project-specific structural, energy, soils, utility, fire, and historic-resource needs before assuming the package is complete.
Working checklist: City of Anaheim ADU Submittal Requirements Checklist ↗
A safe next step
Turn property facts into a review-path decision.
Record the existing buildings, legal use, approximate buildable area, utilities, access, intended ADU type, and known constraints. Then compare the standard path with the City’s other available paths.
Build a browser-local project brief →