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4.2 from 13 Google reviews · Sep 30

Proteus Homes

Proteus Homes specializes in custom-built ADUs, providing a streamlined and stress-free home building experience in California. Our innovative building system combines the quality of custom homes with the efficiency of panelized construction. This allows us to construct your ADU quickly—starting with simultaneous site prep and foundation work. We complete your home in a fraction of the time, with move-in readiness within three months. Whether choosing a popular floor plan or fully customizing your ADU, we ensure your project stays on time and on budget. Trust Proteus Homes for your ADU building needs!

From the business’s Google profile · Oct 2, 2026 · Request a change
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Google · Oct 2, 2026

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Accessory building construction
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Construction site excavation
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Custom home building
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Home addition construction
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Home building
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Install flooring
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ADU Builder San Diego
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ADU Construction
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ADUs San Diego
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Construction Process
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Custom ADU San Diego
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Custom Designed House
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Custom Home Builder
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Reviews

4.2/ 5

13 reviews on Google

Google · Sep 30, 2026

Newest review Oct 2, 2026 · 1 review in the last 3 months (as of Oct 10, 2026)

Newest reviews on GoogleWord for word · read Oct 10, 2026

Suzanne1/5

BEWARE-
Little to no response and ZERO action when problemS, that should be covered by builder warranty arise.

2024 completion-
*Mini-splits leaking after originally installed wrong
*Mini-split outdoor condenser tipping over, due to poor trench backfill
*10ft underground plumbing pipes broke due to poor trench backfill $8,550.90 problem
*yard sinking in along the same trench line.
*Closet rod complete failure
*tub spout leaking, most likely caused by “making diverter fit”
*tried to leave huge pile of extra construction dirt on site- claimed we wanted it
*awful project manager. Original one leaving, should have been a red flag.
*had to switch out water heater, that wasn’t to code
*appliances delivered with no where to put them. Sat outside in inclement weather for a few days
*wrong fasteners used on frame, didn’t pass inspection needed to be fixed
* lien placed on our property due to Proteus not paying a sub contractor

Andrei5/5

We're working with Proteus on a couple of Altadena rebuilds. They have been a great company to work with so far and we intend on continuing the relationship. Luca is one of the founders, he has always been available to answer questions and provide feedback. From a designers standpoint, JD and the team is a pleasure to work with and coordination is a breeze. Our clients have appreciated how quickly and professionally the projects are moving along.

Bobby1/5

Run don’t walk away from this company. They will NOT build your ADU in the advertised (Quick) time frame. They will lie to you. They will damage your existing home . They left our gas water heater unvented for 6 weeks and caused Carbon Monoxide to vent into our kitchen and cause our family to get sick. They will bill you early for services not completed and materials not ordered. They will leave your home open and exposed to water damage. This is only a small portion of the issues we have had with this company . We started this process in October of 2024 and our ADU is still not even close to being finished . DO NOT USE THIS COMPANY!!!

Reply from the business · Oct 10, 2025

Hi Bobby,
I want to thank you for sharing your feedback, both here and in person last week—it’s invaluable in helping us improve as a business. I am deeply sorry about the negative experience and the challenges encountered during the beginning of your project. This is not the standard of service we strive to provide, and I hope you have seen that I take your concerns seriously and am actively working to correct them and improve our process.
The issues you’ve highlighted, including delays, communication breakdowns, and safety oversights, are deeply concerning. I sincerely apologize for the distress and inconvenience this has caused you and your family. I hope to show you that we are fully committed to addressing these matters and seeing your project through to completion with the care and attention it deserves.
I appreciate your trust in allowing us to finish your project, and we are determined to ensure it ends on a strong and positive note. If there are any other concerns that you have not brought to my attention or that arise in the future I would welcome the opportunity to discuss further in person at your convenience.
Sincerely
Ryan Jantz
President
Proteus.Homes

Kevin5/5

This Google review follows my Yelp review
LUCA BRAMMER is truly a 1 in a Million find.
Luca built 2 beautiful solid homes for us.
I interviewed multiple companies & no one came close to matching Honesty, Talent, Price, Quality with design & construction knowledge.
I am a commercial construction mngr. & know all the tricks the other companies tried to play.
Luca walked into the room & we were off to the races where others had just scratched their heads & threw $ at it .
Luca was on point & made our 2 custom home projects an affordable reality.
I was introduced to Luca via my real estate friend that built many successful projects with Luca . I now pass this intro on to you so you too can have a successful project
Thanks to Luca a true professional & great family man …well deserved props to you Luca
…kg

Reply from the business · Oct 10, 2025

Thank you, Kevin, for your kind words. I really appreciate it, and hope you are doing well.

Luca

Kim3/5

Project took a lot longer than initially quoted. Over a full year from the first meeting with Luca to plan and build a shell package. Communication with me and within the company was pretty lacking. End result was ok aside from an overlap on a window to my main house due to a mismeasure on their part.

Gina5/5

It was a very positive experience to work with Proteus Homes. Not only were there several ADU plan options for our space, but we appreciated the choices for customization. We have done several remodeling projects with our main house and we appreciated our contractor, but Proteus topped our previous experiences. Communication was open and all parties were very responsive and helpful. The general contractor for our site was very easy to reach, responded quickly to any question, and followed through with updates on site progress and next steps. Even when unexpected challenges arose, the Proteus team represented our interests well, helped to mitigate costs , and remained flexible finding solutions in a timely manner. Billing was transparent and scheduled at appropriate intervals.
Workmanship was detailed mechanically and aesthetically, work-crews respected our property and clean up was done quickly. We are very pleased with our experience with the Proteus team!

Reply from the business · Oct 10, 2025

Thank you Gina for sharing your experience. We really enjoyed working with you and are so thrilled you now get to enjoy your ADU.

Serina5/5

Proteus Homes is absolutely fantastic! Their quality of work, professionalism, and expertise is quite remarkable! They built a 535sqft detached ADU for my mom and we are very, very happy with the end product!
During the design phase, Luca and JD were extremely helpful when I was stuck on trying to decide which design would fit the vision I had for my mom's ADU! JD communicated regularly throughout the design and permitting process. Ryan was quick to respond to any concerns that needed addressed.
But, once the final phases begun, Rusty was truly the one person that had to work with me on a regularly basis (that in itself is a hard job)! Rusty was kind, patient, and happy to answer my many questions! He never lost his patience with me and always kept such a kind and pleasant demeanor. Thank you Rusty! Your wisdom about the many avenues of construction and your hard work was greatly appreciated!
If you are looking for a team to "weather the storms" of a new build, Proteus Homes will not disappoint! This team is truly a rare find!

Serina

Reply from the business · Oct 10, 2024

Serina, it was truly a pleasure to bring your Moms ADU to life. Watching the surprise reveal for her was so much fun! We are grateful you chose to work with us and are thrilled to see you enjoying all your ADU has to offer. Thank you for the kind words!

Jay5/5

The professionals at Proteus Homes are amazing. Very knowledgeable, very responsive to my questions, very helpful in explaining the permitting and inspection process. I was worried I would get stuck with a cookie cutter ADU that did not fit my needs, but Proteus worked with me to help me fully customize my home and ensure all my needs were met.
5 out of 5 stars!

Reply from the business · Oct 10, 2024

Jay, it was a real pleasure working with you to achieve your property goals! Thank you for the kind words. Cheers to your new ADU!

Randall5/5

Proteus Homes did a suburb custom ADU in a spot I didn’t think possible. The end result was a top-of-the-line luxury 1 bedroom townhome! Excellent craftsmanship and workmanship and quality dependable gentlemen at Proteus Homes! Thank you for a fine home!

Reply from the business · Oct 10, 2024

Thank you Randy! Your ADU is beautiful, and we hope you're enjoying it.

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Google Maps · Sep 30, 2026 · 227 photos on the listing.

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Google listing · Sep 30
Hours
Mon–Fri
9 AM – 5 PM
Sat–Sun
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Based in793 North Ave Ste C, Vista, CA 92083
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Listed asConstruction company · Custom home builder · Home builder · Modular home builder · Shed builder
Google listingManaged by the business
Service optionsOnline estimates · Onsite services

Google Business Profile · Sep 30, 2026

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793 North Ave Ste C, Vista, CA 92083Google Maps listing · Sep 30, 2026Directions ↗Open in Google Maps ↗
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Google listingName, phone, hours, rating and review countSep 30, 2026
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