ORANGE COUNTY CONSTRUCTION
Trusted Local ADU Builder Since 1985 in OC
ORANGE COUNTY CONSTRUCTION — Detached ADU
ORANGE COUNTY CONSTRUCTION — detached adu
ORANGE COUNTY CONSTRUCTION — ADU Living room
ORANGE COUNTY CONSTRUCTION — ADU Kitchen
ORANGE COUNTY CONSTRUCTION — ADU Garage Addition
ORANGE COUNTY CONSTRUCTION — vaulted ceilings
ORANGE COUNTY CONSTRUCTION — second story additions
ORANGE COUNTY CONSTRUCTION — room additions
ABOUT Orange County Construction
ADU & Room Additions in Orange County, CA
From kitchens and bathrooms to full home construction, we specialize in building ADUs, JADUs, garage conversions, and room additions across Orange County.
Design-Build ADU Experts
As a full-service Design-Build ADU Contractor, we handle everything from concept to completion, including:
Free on-site design consultation
Complete design plans & structural engineering
City submissions & permit approvals
Turnkey ADU construction
What Are ADUs and JADUs?
ADUs (Accessory Dwelling Units) are standalone or attached residential units added to your property—ideal for guest suites, rentals, or multigenerational living.
JADUs (Junior ADUs) are smaller units, often garage or spare room conversions.
Garage Conversions
Convert your garage into usable space:
Home office
Gym or studio apartment
Guest living quarters
Why Choose Us?
Led by owner Keith Daigneault, Orange County Construction offers personalized service. When you request a FREE estimate, Keith visits your site and provides a detailed, written bid. We bring decades of experience, local permit knowledge, and a proven track record.
Our Services Include:
ADUs, JADUs, and garage conversions
Attached or detached builds
Custom design & city-approved plans
We handle everything—start to finish
Where We Build
Proudly serving North Orange County, including:
Anaheim, Costa Mesa, Cypress, Fountain Valley, Fullerton, Garden Grove, Huntington Beach, Irvine, Newport Beach, Orange, Santa Ana, Tustin, Westminster, Yorba Linda, and more.
Why Homeowners Trust Us:
Over 35 years remodeling in OC
Transparent communication
Detailed contracts
Committed to doing what we say
Get Started Today!
Contact us for a free estimate and a guaranteed written price. From planning to permits to final build—we make your ADU or addition easy.
