ADU Construction in Monterey County

Custom ADU solutions planned for your property and lifestyle, aligned with your budget and delivered with full-service support the whole way through.

Turn Your Backyard Into Income-Generating Living Space

Accessory Dwelling Units are transforming how Monterey County homeowners use their property. Whether you’re looking to house aging parents, generate rental income, create a home office, or add property value, an ADU offers flexibility that traditional additions can’t match.

But building in Monterey County isn’t simple. Coastal zone restrictions, city-specific regulations, and strict permitting requirements make ADU construction challenging.

Permitting and Compliance

Navigate permitting with ease through our expertise in local codes and regulations. We handle all permits and ensure your ADU meets zoning and safety standards.

Site Prep & Evaluation

Get your property ADU-ready with expert site evaluation, grading, and utility setup—all handled for a seamless build.

ADU Design & Construction

Create the perfect ADU with our custom design and planning services. We work with you to design a space that meets your needs, whether it’s for additional living quarters, a rental unit, a home office, or a guest house.

Three ADU Options for Your Property

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Detached ADU

Maximum privacy and rental potential with a fully independent living space. Perfect for long-term rentals, multigenerational living, or guest housing. Built from the ground up with coastal-grade materials that withstand salt air and marine layer moisture.

Garage Conversion ADU

The most cost-effective ADU option since the structure already exists. We handle utility connections, insulation upgrades, and interior buildout while maintaining exterior aesthetics that match your home.

Attached ADU

Built onto your existing home with shared walls but separate entrance. Creates close proximity for family while maintaining independence. Often the fastest permit approval since it's considered a home addition.

From Vision to Move-In Ready

Site Assessment & Feasibility

We evaluate your property for ADU potential, checking lot size, setbacks, utility access, coastal zone restrictions, and city regulations. You'll know exactly what's possible before investing a dollar.

Design & Permitting

We handle the complex permit maze so you don't have to. Our relationships with Monterey County building departments, coastal commission staff, and design review boards speed approvals and prevent costly delays.

Construction

We build your ADU with coastal-grade materials designed for salt air, moisture, and marine layer conditions. Daily on-site oversight ensures quality craftsmanship and keeps your project on schedule.

Move-In Ready

We deliver a completed ADU that meets all code requirements, passes inspections, and receives occupancy approval. Whether you're moving in family or listing for rent, your ADU is ready for immediate use.

ADU Testimonials

I am writing to express my sincere gratitude for the outstanding work Precision Construction General Contracting Services Inc performed on my new ADU. After reviewing several estimates, the free and honest breakdown of each project stage was a major highlight for me, especially as someone with no prior building experience. The contractor (Aaron Palacios) clear communication from the start made a significant difference. I was particularly impressed by how the team handled everything, from resolving design discrepancies to managing permits and city walkthroughs. Their deep knowledge of specific ADU regulations gave me complete confidence in my choice of contractor and made the entire experience seamless and stress-free. The project was finished with high-quality results, and I appreciated how the construction site was kept clean to minimize disruption to my main home. The team’s professionalism and expertise truly demonstrated a commitment to excellence. I will highly recommend the company services for any ADU project. Thank you again for the outstanding and excellent work! Best regards, Rebecca Gilpas
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