Maximize Your Property’s Potential with J. Starr Construction

Are you looking to build a backyard home, rental unit, or in-law suite on your property? At J. Starr Construction, we specialize in designing and building custom Accessory Dwelling Units (ADUs) throughout the San Gabriel Valley and Inland Empire. Whether you’re creating extra income through rental space or housing family members, our team delivers turnkey ADU solutions tailored to your goals.

Your Local ADU Experts

ADU construction is one of the smartest ways to increase your property’s value and functionality. At J. Starr Construction, we stay up to date with California’s evolving ADU laws and streamline the entire process—from planning and permitting to final inspection.

Why Build an ADU with J. Starr Construction?

• ✅ Experienced ADU Contractors in SoCal

• ✅ Full-Service Design & Build Team

• ✅ In-House Permitting and Planning Experts

• ✅ Customized Layouts to Fit Any Lot or Budget

• ✅ High-Quality Materials & Craftsmanship

Types of ADUs We Build

Detached ADUs

A stand-alone backyard unit, perfect for rentals, guesthouses, or extended family.

Attached ADUs

An addition to your existing home that seamlessly blends with your architecture.

Garage Conversions

Transform an unused garage into a fully livable and code-compliant dwelling.

Junior ADUs (JADUs)

Smaller, efficient living spaces within the footprint of your primary home—ideal for affordability and quick approvals.

Our ADU Process

1. Free On-Site Consultation
   We evaluate your property and discuss your goals, timeline, and budget.

2. Design & Planning
   Our designers create custom ADU plans that meet city codes and match your home’s style.

3. Permitting
   We handle all necessary permits and paperwork so you don’t have to.

4. Construction
   Our experienced builders complete your ADU with precision, quality, and professionalism.

5. Final Walkthrough & Delivery
   We make sure every detail is complete and you’re fully satisfied before we wrap up.

Serving the San Gabriel Valley & Inland Empire

We proudly build ADUs in cities like Glendora, Pasadena, Pomona, Riverside, Rancho Cucamonga, and surrounding communities. Our local experience ensures your ADU project meets all city and county requirements without delays.