From Site Visit to Keys.
One team, one single contract.
Traditional contractors hand you off between separate architects, permit expediters, and trade crews. ADU Alliance coordinates all four inside a single transparent project plan with a 100% permit approval guarantee.
Property Feasibility
Lot setback analysis, sewer/water/electrical mapping, HOA rule review, and fixed scope proposal.
Architectural Design
3D modeling, floor plans, structural engineering calculations, and Title 24 energy compliance sets.
City Permitting
Plan check submission, city comment resolution, and guaranteed permit issuance across Orange County.
Turnkey Construction
Licensed Class B ground-up construction, weekly photo updates, final inspection, and keys handover.
California State ADU Laws Homeowners Must Know
Recent California legislation (AB 68, SB 13, and AB 1033) has made ADU permitting faster and legally protected across Orange County.
60-Day Mandatory Approval
Under California government code, local city building departments must act on compliant ADU permit applications within 60 days of complete submission.
HOA Restrictions Prohibited
Under Assembly Bill 670, Homeowners Associations cannot prohibit or unreasonably restrict the construction of ADUs or Junior ADUs on single-family properties.
4-Foot Setback Mandate
Cities cannot require more than 4-foot side and rear setbacks for detached ADUs up to 16-18 feet in height, maximizing your yard usability.
No Replacement Parking Required
When converting an existing garage into an ADU, California law prohibits cities from requiring replacement off-street parking spaces in almost all Orange County zones.
Find Out What You Can Build on Your Lot
We review your lot dimensions, setbacks, and city zoning bylaws before you spend a dollar.
Request Free Feasibility Assessment →