How long does it take to build an ADU?

Most ADU projects take about 4–8 months from design to final inspection. Timing depends on the size of the ADU, site conditions, and how quickly your city or county reviews permits.

Do you handle ADU permits and plans?

Yes. We manage the ADU permit process, coordinate with your local city or county, and work with engineers and inspectors so your project keeps moving forward.

Can I rent out my ADU?

In many areas, you can use an ADU as a long‑term rental. Rules vary by city and county, so we always recommend checking current zoning and rental regulations for your property.

What areas do you serve for ADU projects?

We build ADUs and garage conversions throughout San Joaquin County and Stanislaus County.

How much does an ADU usually cost?

ADU costs vary based on size, finishes, and site conditions. During your consultation, we’ll review your property and give you a realistic budget range for your ADU.

ADU Contractor for Garage Conversions & Custom ADUs

Preferred Construction Group is a locally owned general contractor serving San Joaquin County and Stanislaus County. We specialize in ADUs, garage conversions, additions, and remodels, delivering quality construction with clear communication and reliable timelines. As an experienced ADU contractor and ADU builder, we guide your project from initial permits to the final walkthrough with over 15 years of industry expertise.

What we handle:
Permit Coordination • Complete Project Management • Full-Service Build from Foundation to Finish

Bilingual service:
English & Spanish — contact us to schedule a consultation.

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Our ADU Process

Our ADU process is designed to keep you informed and avoid delays with the city or county.

01

ADU Site Visit & Consultation

Walk your property, review ideas, and discuss budget, timeline, and goals for your ADU or garage conversion.

02

ADU Design & Budget

Develop a layout, refine the design, and finalize a realistic budget for your ADU project.

03

ADU Permits & Engineering

We coordinate with your city or county, manage the permit submittals, and work with engineers as needed.

04

ADU Construction & Inspections

Our licensed team handles the build, coordinates trades, and keeps inspections on schedule.

05

Final Walkthrough & Move-In

Do a final walkthrough together, create a punch list if needed, and get your ADU ready for move-in or rental.

Why Homeowners Choose ADUs

A well-planned ADU adds value, flexibility, and long-term options for your property.

Create rental income with a backyard ADU

Generate steady monthly cash flow by utilizing your unused backyard space for a long-term rental unit.

Increase your property value with a permitted ADU

Add significant equity to your home with high-quality, fully permitted square footage that appeals to future buyers.

Add private space for family or aging parents

Keep loved ones close while maintaining independence and privacy with a custom-designed guest suite.

Modern, energy-efficient construction and finishes

Enjoy the latest in building technology, from smart home features to eco-friendly materials and high-end finishes.

ADU & Garage Conversion Projects

See how we’ve turned unused space into high‑value ADUs for local homeowners.

ADU FAQs

Start Your ADU Project

Tell us about your property, budget, and timeline. We’ll walk you through your ADU options and next steps.

Schedule ADU Consultation