Summary
- Location
- Orange County, California, USA
- County-level accepted plans
- 6 accepted plans
- Providers
- 1 provider
- Origin programs
- 1 program
- Plan size range
- 393 to 1,200 sq ft
- Permit sources
- 17 sources
County context
Orange County Pre-Approved ADU Plans
Browse official city and county pre-approved ADU plan programs in Orange County, California.
Program Overview
This Orange County page summarizes source-backed county context for Orange County, California. The current public dataset lists 3 city program pages in this county and 6 county-level accepted-plan records. County-level plan sources include OC Development Services, Orange County Public Works / OC Development Services, Design Path Studio, and others. Provider names include Design Path Studio.
County records may apply only in unincorporated areas or county-administered jurisdictions, so verify the official source before relying on a plan for an incorporated city. County fee and permit data includes 4 fee records and 14 permit requirement records. Missing source fields remain Not listed in source, and directory records do not guarantee permit approval.
Included Locations
City
Anaheim, Orange County, California, USA
4 accepted plans
City
Garden Grove, Orange County, California, USA
4 accepted plans
City
Santa Ana, Orange County, California, USA
10 accepted plans
County-Level Accepted Plans
6 plans Source-backed record Official county source
- Provider
- Design Path Studio
- Origin program
- Orange County, California, USA
- Accepted location
- Orange County, California, USA
- Size
- 558 sq ft
- Bedrooms
- 1 bed
- Bathrooms
- 1 bath
- Last checked
- May 1, 2026
Verify current acceptance, site limits, and permit requirements with the local building department.
Source-backed record Official county source
- Provider
- Design Path Studio
- Origin program
- Orange County, California, USA
- Accepted location
- Orange County, California, USA
- Size
- 393 sq ft
- Bedrooms
- Studio
- Bathrooms
- 1 bath
- Last checked
- May 1, 2026
Verify current acceptance, site limits, and permit requirements with the local building department.
Source-backed record Official county source
- Provider
- Design Path Studio
- Origin program
- Orange County, California, USA
- Accepted location
- Orange County, California, USA
- Size
- 972 sq ft
- Bedrooms
- 3 beds
- Bathrooms
- 2 baths
- Last checked
- May 1, 2026
Verify current acceptance, site limits, and permit requirements with the local building department.
Source-backed record Official county source
- Provider
- Design Path Studio
- Origin program
- Orange County, California, USA
- Accepted location
- Orange County, California, USA
- Size
- 1,200 sq ft
- Bedrooms
- 3 beds
- Bathrooms
- 2 baths
- Last checked
- May 1, 2026
Verify current acceptance, site limits, and permit requirements with the local building department.
Source-backed record Official county source
- Provider
- Design Path Studio
- Origin program
- Orange County, California, USA
- Accepted location
- Orange County, California, USA
- Size
- 748 sq ft
- Bedrooms
- 2 beds
- Bathrooms
- 1 bath
- Last checked
- May 1, 2026
Verify current acceptance, site limits, and permit requirements with the local building department.
Source-backed record Official county source
- Provider
- Design Path Studio
- Origin program
- Orange County, California, USA
- Accepted location
- Orange County, California, USA
- Size
- 800 sq ft
- Bedrooms
- 2 beds
- Bathrooms
- 2 baths
- Last checked
- May 1, 2026
Verify current acceptance, site limits, and permit requirements with the local building department.
Permit Requirements
14 requirementsDetached
County complete package
Selected pre-approved ADU plan with completed title sheet, site plan, solar plan, plan preparation checklist, hold harmless statement, WQP/NPP form, and C&D diversion compliance work plan.
- Last checked
- May 1, 2026
- Notes
- Not listed in source
Detached
County plan code cycle
Available plans currently reflect 2022 California Building Code Standards; County says updates to 2025 standards are in process.
- Last checked
- May 1, 2026
- Notes
- Not listed in source
Detached
County application portal
Applicants using county pre-approved plans must submit complete package through MyOCService for review and approval.
- Last checked
- May 1, 2026
- Notes
- Not listed in source
Unincorporated county
Geographic scope
The County preapproved plan program is documented for unincorporated areas of Orange County.
- Last checked
- Jul 28, 2026
- Notes
- This does not establish acceptance inside incorporated Anaheim.
Unincorporated county
Complete application package
Submit the selected plan with completed title sheet, site plan, solar plan, checklist, hold-harmless statement, WQP/NPP form, and construction-diversion work plan.
- Last checked
- Jul 28, 2026
- Notes
- Not listed in source
Unincorporated county
Residential zoning
Confirm that the property is zoned for residential use before selecting and submitting a County preapproved plan.
- Last checked
- Jul 28, 2026
- Notes
- Not listed in source
Site specific
Site plan and property data
Provide a scaled site plan with structures, property lines, dimensions, zoning, overlays, setbacks, easements, topography, slope, and lot coverage.
- Last checked
- Jul 28, 2026
- Notes
- Not listed in source
Site specific
Solar plan
Obtain a site-specific solar plan from a third-party solar installation company.
- Last checked
- Jul 28, 2026
- Notes
- Not listed in source
Unincorporated county
Hold-harmless statement
The property owner must sign the County's preapproved-plan hold-harmless statement and have it notarized.
- Last checked
- Jul 28, 2026
- Notes
- Not listed in source
Site specific
Parking analysis
Show required parking or document an applicable exemption, including a transit walking path when relying on the half-mile transit exemption.
- Last checked
- Jul 28, 2026
- Notes
- Not listed in source
Site specific
Fire review
Fire sprinklers are required if the main house is sprinklered or the ADU is within five feet of a property line; very-high-fire-hazard sites require OCFA review.
- Last checked
- Jul 28, 2026
- Notes
- Not listed in source
Site specific
Utility and wastewater details
Show water, gas, electric, and wastewater connections; new electric service must be underground, and septic sites require Regional Water Board review.
- Last checked
- Jul 28, 2026
- Notes
- Not listed in source
Unincorporated county
County review and approval
A complete package must still be submitted through MyOCService for County review and approval.
- Last checked
- Jul 28, 2026
- Notes
- Preapproval of the reusable plan does not approve a particular property.
Unincorporated county
Short-term rental restriction
County ADUs and JADUs cannot be used for short-term rentals and must be rented for at least 30 days.
- Last checked
- Jul 28, 2026
- Notes
- Not listed in source
Fees
4 fee recordsDetached
County pre-approved plan download fee
County proposal says pre-approved ADU plans will be available to view and download from the County website at no cost.
- Last checked
- May 1, 2026
- Notes
- Not listed in source
Detached
County reduced plan check fee
County proposal anticipated a reduced plan check fee charging only 25% of the standard plan check fee for applicants using pre-approved plans.
- Last checked
- May 1, 2026
- Notes
- Not listed in source
All six County plan sets
Preapproved plan cost
$0
- Last checked
- Jul 28, 2026
- Notes
- No-cost plan documents do not eliminate plan-check, permit, solar, utility, construction, or professional costs.
Unincorporated county
Preapproved-plan plan-check fee
Reduced relative to the standard plan-check fee; current exact amount was not published on the catalog.
- Last checked
- Jul 28, 2026
- Notes
- A 2024 staff report anticipated 25% of the standard fee, but that proposal was not treated as a confirmed current amount.
Official Sources
17 sourcesAccessory Dwelling Unit Pre-Approved Plans Staff Report
- Publisher
- OC Development Services
- Last checked
- Jul 28, 2026
Accessory Dwelling Units (ADU) Flyer January 2026
- Publisher
- Orange County Public Works / OC Development Services
- Last checked
- May 1, 2026
Accessory Dwelling Units Guide
- Publisher
- OC Development Services
- Last checked
- Jul 28, 2026
Design Path Studio
- Publisher
- Design Path Studio
- Last checked
- Jul 28, 2026
One-Bedroom 558 Sq Ft Plan Set
- Publisher
- Orange County Public Works
- Last checked
- Jul 28, 2026
Pre-Approved ADU Hold Harmless Statement
- Publisher
- Orange County Public Works
- Last checked
- Jul 28, 2026
Pre-Approved ADU Plans Application Process Guide
- Publisher
- OC Development Services
- Last checked
- Jul 28, 2026
Pre-Approved ADU Plans Provide a Streamlined and Affordable Option
- Publisher
- Orange County Public Works
- Last checked
- Jul 28, 2026
Pre-Approved Accessory Dwelling Unit (ADU) Plans - Application Process Guide
- Publisher
- Orange County Public Works / OC Development Services
- Last checked
- May 1, 2026
Pre-Approved Accessory Dwelling Unit (ADU) Plans | OC Development Services California
- Publisher
- Orange County Public Works / OC Development Services
- Last checked
- May 1, 2026
Pre-Approved Accessory Dwelling Unit Plans
- Publisher
- Orange County Public Works
- Last checked
- Jul 28, 2026
Proposal: Accessory Dwelling Unit Pre-Approved Plans
- Publisher
- Orange County Public Works / OC Development Services
- Last checked
- May 1, 2026
Studio 393 Sq Ft Plan Set
- Publisher
- Orange County Public Works
- Last checked
- Jul 28, 2026
Three-Bedroom A 972 Sq Ft Plan Set
- Publisher
- Orange County Public Works
- Last checked
- Jul 28, 2026
Three-Bedroom B 1,200 Sq Ft Plan Set
- Publisher
- Orange County Public Works
- Last checked
- Jul 28, 2026
Two-Bedroom One-Bath 748 Sq Ft Plan Set
- Publisher
- Orange County Public Works
- Last checked
- Jul 28, 2026
Two-Bedroom Two-Bath 800 Sq Ft Plan Set
- Publisher
- Orange County Public Works
- Last checked
- Jul 28, 2026