Building an ADU in Yorba Linda
Yorba Linda homeowners often have something many Orange County properties lack: space. Larger lots, sloped backyards, and room to spread out make an ADU a smart way to house family, host long-term guests, or add rental income. Lamarc Prime Builders builds ADUs for Yorba Linda homeowners and plans for the things that make this city different, including neighbor notification, grading and drainage on sloped lots, and review by agencies like the Orange County Fire Authority and Yorba Linda Water District. We guide you through each step so there are no surprises.
ADU Services Available in Yorba Linda, CA
ADU projects in Yorba Linda often involve larger properties and long-term planning goals. We work closely with homeowners to assess site conditions, explore layout options, and guide the project through permitting and construction with attention to detail and quality.
✅ Detached & Attached ADUs
✅ Garage Conversion ADUs
✅ Junior ADUs (JADUs)
✅ ADU Planning & Design Coordination
✅ Permits, Plan Submittals & City Revisions
✅ Construction, Inspections & Final Completion
Not sure how your property qualifies? Start with a free site evaluation for clear, practical guidance.
ADU Rules in Yorba Linda
ADUs allowed per lot
1 ADU + 1 JADU per lot
Max detached ADU size
Generally 1,000 sq ft; up to 1,200 sq ft on lots of 15,000+ sq ft with Planning Commission approval
Max attached ADU size
Up to 50% of the main home's living area
Max JADU size
150 to 500 sq ft
Max height (detached)
16 ft (18 ft near major transit) + 2 ft for roof pitch
Two-story ADU
Generally one story; a second story needs a conditional use permit
Setbacks
4 ft side and rear for one-story ADUs up to 1,000 sq ft
Space between buildings
Per your zone's standards; we confirm for your lot
Parking
1 space (tandem allowed); none near transit, for conversions, or in historic districts
Owner occupancy
Generally not required for an ADU under state law; we confirm with the city
Short-term rental (Airbnb)
Short-term rentals prohibited; long-term tenants or family only
Impact fees
None under 750 sq ft; school district fees apply over 500 sq ft
Pre-approved plans
Program in development; none available yet
Permit review
Separate Planning review first, then the Building permit
Approval timeline
60 days for Planning after a complete application
Local insight
Yorba Linda's Planning application includes a neighbor ownership list and radius map, and sloped lots often need extra grading and drainage review. We prepare those pieces for you.
How ADU Permitting Works in Yorba Linda
Yorba Linda uses a separate Planning review before the Building permit. The Planning application is ministerial, meaning the Community Development Director approves it if it meets the standards, within 60 days of a complete application. Building permits are issued only after the city finds the plans comply with zoning.
The Planning package includes scaled site plans, elevations with a color and material sample board, floor plans, a neighbor ownership list on labels with a radius map of adjacent parcels, and a short ADU survey. Plans are submitted as a digital copy on a USB drive plus one hard copy, and the city charges a set planning fee (currently $1,880).
Depending on your lot, you may also need review by the Engineering Division, Building Division, Orange County Fire Authority, Yorba Linda Water District, and the school district. Anyone affected can appeal a decision to the Planning Commission within 15 calendar days. We coordinate all of these so you only deal with one point of contact.
Property feasibility review
Review zoning, lot conditions, access, utilities, and applicable ADU requirements.
ADU design and preparation
Prepare the site plan, architectural drawings, engineering, and required supporting documents.
City plan review and approvals
Submit the application, coordinate with city departments, and respond to plan-check corrections.
Permit issuance and construction
After approval and permit issuance, proceed with construction and required inspections.
FAQs
Do I have to notify my neighbors before building an ADU in Yorba Linda?
The application requires property owner information for the adjacent parcels, provided as a typed list on labels and a radius map. We prepare that part of the submittal for you.
Will my sloped or large lot need extra review?
Often. Easements, grading, drainage, and water quality requirements can lead to additional submittals beyond the planning application, which is why we evaluate your lot early.
Which agencies besides the city review ADUs here?
Depending on your lot, the Orange County Fire Authority and the Yorba Linda Water District may be involved, along with the city’s Engineering Division. The Placentia-Yorba Linda Unified School District charges fees on ADUs over 500 sq ft.
Can I build a second-story ADU in Yorba Linda?
Possibly. ADUs here are generally one story, and a second-story ADU needs to meet the city’s two-story standards and a conditional use permit. Second-story ADUs also use your main house’s setbacks, so lot size matters.
Can I rent my Yorba Linda ADU on Airbnb?
No. The city prohibits short-term rentals. Renting to a long-term tenant or housing family is allowed.
How big can my ADU be in Yorba Linda?
Generally up to 1,000 sq ft. If your lot is 15,000 sq ft or larger, the Planning Commission can approve up to 1,200 sq ft through design review. An attached ADU can be up to 50% of your home’s living area.
