ADU timelines vary depending on the size, design, permitting process, and type of construction. On average, most ADU projects take between 4–8 months from design to completion. We provide clear timelines and regular updates throughout the entire process.

We specialize in detached ADUs, attached ADUs, garage conversions, above-garage units, and custom additions. Our team works closely with homeowners to design solutions that fit their property, budget, and goals.

Yes. We assist with the permitting and approval process from start to finish, including plans, submissions, and coordination with local city departments to help keep your project moving smoothly.

Costs vary based on square footage, design, finishes, and site conditions. Garage conversions are typically more cost-effective than new detached ADUs. We provide transparent pricing and detailed estimates so you know exactly what to expect.

In many cases, yes. A well-designed ADU can add functional living space, increase rental income potential, and improve overall property value. Many homeowners use ADUs for family housing, guest spaces, or long-term rental income.

CATO Construction is a family-owned company with over 20 years of experience serving Southern California. We focus on quality craftsmanship, transparent communication, efficient timelines, and competitive pricing to make the construction process as stress-free as possible.