10 Best ADU Construction Companies In Rancho Palos Verdes, CA
The City of Rancho Palos Verdes enforces some of the most careful zoning rules in Los Angeles County.
Properties here sit alongside the Palos Verdes Nature Preserve, 1,500 acres of protected coastline that shapes everything from lot grading to environmental review timelines. Add the bluffs where the Point Vicente Lighthouse has stood since 1926, and you have a setting that rewards careful planning and punishes shortcuts.
An ADU here can generate rental income that meaningfully offsets property taxes. It can bring aging parents close without anyone losing their independence. It can give a grown child or a long-term tenant a real home, not just a converted garage.
The returns are real, and they last for decades. But getting there takes a contractor who knows this terrain, literally and figuratively. Here’s a look at who’s worth your time.
1. Cornejos Builders
When you call Cornejos Builders, the owner, Alexsander Cornejo, comes out to walk your property with you. He has been in construction since 2009, and he brings that hands-on experience to every consultation.
We’ve built ADUs across Rancho Palos Verdes, and we know what this terrain demands. The coastal zone adds another layer of permit review that can extend timelines if you don’t know what documentation the planning department expects. We’ve navigated these requirements dozens of times, and we know how to keep your application moving forward.
Here’s what we handle, start to finish:
- All planning, permitting, and architectural coordination
- Foundation and grading work for sloped lots
- Coastal climate waterproofing and year-round ventilation
- Full construction and finishing
ADU costs in Rancho Palos Verdes run from around $80,000 for a straightforward garage conversion to roughly $250,000 for a ground-up two-bedroom unit with a full kitchen and bath.
Most ADUs are completed within 90 days of permit approval. Every material we bring on-site carries a manufacturer’s warranty. Our workmanship is covered by a one-year guarantee on top of that.
Your project manager is on site every day. Alexsander checks in regularly. And the layout decisions we make together, the ones that make 600 square feet feel open and functional rather than cramped, come from years of building units that families actually love living in.
Wendy Nuno
It was a pleasure to have this company do my company remodel. From the initial call to the finished product, the company was professional and communication was excellent.
They understood the needs of the project and executed it way past my expectations. I would highly recommend them for remodel
Daisy Tapia
Highly observant to detail or changes that others often over look. Gives various options on products and communicates in a professional manner.
I really admire the work ethic.
1. THE ADU BUILDER
Bay Cities Construction is a full-service South Bay general contractor founded in 2004. The company specializes in ADU construction, kitchen and bathroom remodels, home additions, balcony waterproofing, and seismic retrofits.
Bay Cities serves Rancho Palos Verdes, Palos Verdes Estates, Redondo Beach, Torrance, and the broader South Bay. Their design-build process covers in-house architectural drafting, structural engineering, permit processing, and a dedicated project management system.
Marisa R
Marlon A. M.
3. Gaelic Construction & Design Inc.
Gaelic Construction & Design, Inc. is a full-service general contractor based in Rancho Palos Verdes. In business since 1990, the firm is led by owner Charles Clarke and serves residential and commercial clients throughout the South Bay, Los Angeles, and Orange County.
Services include ADUs, new home construction, home additions and extensions, kitchen and bathroom remodeling, garage builds, pools, and hardscaping.
Marla A.
4. Buchholz Construction
Buchholz Construction is a design-build general contractor based in Rolling Hills Estates, serving Rancho Palos Verdes for over 30 years.
The firm specializes in custom home construction, ADUs and guest houses, residential and commercial additions, kitchen and bath renovations, retaining walls, caisson and grade beam construction, and site evaluation.
Kim R.
5. Hami Construction Inc.
Hami Construction Inc. is a Torrance-based general contractor serving Rancho Palos Verdes, Palos Verdes Estates, and the South Bay. They specialize in ADU construction, garage conversions, kitchen and bathroom remodeling, backyard cottages, granny flats, and home additions.
Their team is experienced in navigating local building codes and zoning regulations across the Palos Verdes Peninsula, including those for hillside lots.
Vida A.
Hamidreza A.
6. Supreme Remodeling Inc.
Supreme Remodeling Inc. is a licensed, bonded, and insured general contractor with over 30 years of experience serving Southern California, including Rancho Palos Verdes.
Based in Van Nuys, the company offers ADU construction and garage conversions, kitchen and bathroom remodeling, room additions, hillside construction, new home builds, and full home renovations.
Their in-house team of project managers and skilled construction crews manages every phase from blueprints and permits through final inspection, with no subcontracting.
Frank D.
7. My Space Remodeling
My Space Remodeling is a California-licensed and insured general contractor with over 20 years of experience specializing in ADU design and construction, serving Rancho Palos Verdes and surrounding communities.
Services cover the complete ADU process (consultation, design, permitting, and construction) for detached units, garage conversions, and attached ADUs.
Margarita L.
8. Eli's Construction & Sheet Metal Inc.
Eli’s Construction & Sheet Metal Inc. is a family-owned general contractor based in Torrance, CA, serving Rancho Palos Verdes, Redondo Beach, and the surrounding coastal communities.
The company specializes in ADU construction, kitchen and bathroom remodeling, home additions, and full-service general contracting. Their team manages ADU projects from zoning analysis and design through permit navigation and construction, with local expertise in Rancho Palos Verdes’ specific building requirements.
Jorge G.
Rocio L.
9. Golden ADU
Golden ADU is a Los Angeles-based ADU-only design-build company founded in 2021, serving Rancho Palos Verdes and the broader Southern California market.
Unlike general contractors, the company focuses exclusively on accessory dwelling units, covering garage conversions, detached ADUs, attached ADUs, basement conversions, room additions, and second-story builds.
Evan B.
Albert C.
10. Rocha Construction
Rocha Construction is a licensed, bonded, and insured South Bay general contractor with over 30 years of experience serving Torrance, Rancho Palos Verdes, Manhattan Beach, Redondo Beach, and the surrounding coastal communities.
The company specializes in complete home remodeling, ADU construction, home additions, kitchen upgrades, bathroom remodels, and exterior improvements. Their team’s familiarity with South Bay coastal properties.
Carlos R.
The Best Choice Comes Down To This
Comparing your options before committing to a project this size is just good sense, and if you’ve done your research on ADU construction companies in Rancho Palos Verdes, you’ve seen how wide the gap is between contractors who know this area and those who are figuring it out as they go.
Cornejos Builders has been in Southern California construction since 2009. The owner shows up personally. The permits get handled. The coastal zone requirements get managed properly. And the finished unit, the one your family uses every day or your tenant calls home for years, gets built with the long view in mind.