ADU Contractors In Southern California

Complete design-build solutions for your Accessory Dwelling Unit

Thinking about building an ADU in Southern California? At Subworkit Contracting, we make the entire process simple and stress-free. Our licensed team handles every step—from creative ADU design to complete construction—so you can add a rental unit or in-law suite. We prioritize transparency by giving you a clear picture of the cost to build an ADU before we start.

What We Offer

Custom architectural drawings and Title 24 compliance
Structural engineering and plan check coordination
Permit filing, city corrections, and official approvals
Complete ground-up construction including foundation, framing, plumbing, and HVAC

Why Choose Subworkit Contracting?

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Licensed and insured California general contractor

Deep local experience with city zoning and ADU rules

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Transparent estimates and realistic project timelines

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One-stop shop for drawings, permits, and construction

Project Pricing

Most attached ADU additions take 4–6 months to complete after city approval. Budgets typically range from $160,000–$320,000+, depending on project size, materials, and site conditions.

Contact us for a detailed quote tailored to your specific project.

Ready to Start? Get a Free Consultation

Let's discuss your project! Contact our team for a no-obligation consultation with a leading ADU contractor in Southern California.

We Serve All of Southern California

San DiegoLos AngelesOrange CountyRiversideInland Empire