Expert ADU Builders & Casita Contractors in Roseville, CA
Expand Your Living Space. Increase Property Value. Looking for an "ADU builder near me"? GBG Construction Inc. is Roseville’s premier contractor for Accessory Dwelling Units (ADUs), granny flats, and garage conversions. We navigate the Placer County permits so you can focus on the result.
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Why Roseville Homeowners Trust GBG Construction
Building an ADU is a major investment. You need a contractor who understands City of Roseville Zoning and Placer County Building Codes.
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5-Star Rated: Verified reviews from your neighbors in Roseville & Rocklin.
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Full Service: From initial design and blueprints to final inspection.
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License #1071343: Fully bonded and insured General Contractor.
FREE ADU CONSULTATION
Our ADU Construction Services in Roseville
Detached ADUs (Backyard Cottages)
The most popular choice in Roseville. We build standalone units ranging from 400 to 1,200 sq. ft. Perfect for rental income, aging parents, or a home office.
Garage Conversions (JADU)
Maximize your existing footprint. We transform underutilized garages into fully functional Junior ADUs (JADUs) with kitchens and baths. This is often the most cost-effective way to add housing in Roseville.
Attached In-Law Suites
Keep family close. We design seamless home additions that provide privacy for multi-generational living while connecting to your main utilities.


Navigating ADU Permits in Roseville
Roseville has become one of the most ADU friendly cities in California, but the rules are specific.
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Setbacks & Height: We ensure your design meets the specific side and rear yard setbacks required by Roseville zoning.
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Utility Connections: We handle the complexity of connecting sewer, water, and power to the new unit, often a sticking point in Placer County projects.
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Energy Efficiency: All our builds meet Title 24 energy standards, ensuring your new unit is comfortable during Roseville's hot summers.
From Design to Keys: Our Build Process
Site Feasibility
We inspect your Roseville property to check for easement issues and utility access.
Design & Plans
We create architectural drawings that meet City of Roseville submission standards.
Permitting
We submit the plans to the building department and handle all corrections.
Construction
Foundation, framing, rough-in, and finish. We manage every trade.
Final Inspection
We walk you through your new move-in ready home.