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Avorino

Find out what your ADU will cost — instant Orange County ADU cost estimate

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Get your instant ADU cost estimate

Most detached Orange County ADUs run$245K–$440K+Where does yours land? ~30 seconds, tap through.
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B-#11075387+ yrs37 OC cities & communitiesPrefer to talk? (714) 900-3676

7+YearsOrange County experience
B-#1107538LicenseCalifornia General-B
37OC Cities + CommunitiesCoverage across all of Orange County
4.8★RatingYelp

As featured in

Detached ADU exterior — ground-up Avorino build, Santa Ana
Detached ADU interior — Avorino build, Santa AnaDetached ADU interior — Avorino build, Santa Ana

Detached ADU (Ground Up) · Santa Ana

★★★★★
Avorino built us an ADU recently. They provided the full design and rendering, pulled permits, and built our 1,000 sqft ADU from start to finish. Easy to work with, prices very competitive. We've already recommended Avorino to friends.
Ray W. · 1,000 sqft detached ADU · Irvine

ADU reviews

More ADU homeowners, in their own words.

★★★★★
These are the best people in the business. I used Avorino to build my own ADU. They beat every single price I got and on top of that did an excellent job finishing it in no time. Truly the best of the best — highly recommended.
Shahin S. · Detached ADU · Orange County
★★★★★
My parents are getting older and I wanted them close by, so I reached out to several contractors. Avorino really impressed me — extremely professional, timely, and clear communication throughout. The crew was respectful and made me feel comfortable. My parents were so happy with how their space turned out.
Alarah R. · Multi-generational ADU · Orange County
★★★★★
Avorino converted our RV garage to a custom ADU. Organized, clear communication, and easy to work with. Our architect made mistakes on the plans, but Avorino helped work through every issue. I highly recommend them.
Sam W. · RV-garage conversion ADU · Orange County
★★★★★
They converted our one-car garage into a Junior ADU. The city was difficult to work with, and Avorino took care of everything with them. Whenever things came up, they were quick to respond. Six months after finishing, there are no issues at all. Their cost was very competitive — extra stars for being very professional. I'd definitely work with them again.
Alex D. · Junior ADU — garage conversion · Orange County

How it works

From “what will it cost?” to keys — in three steps.

  1. 1

    Get your instant estimate

    A few quick questions. Your ballpark range appears on-screen — no call, no commitment.

  2. 2

    We confirm your real number

    We check your lot and your city’s rules, then text you a free written, fixed-price quote.

  3. 3

    We design, permit & build under one roof

    Plans, permits, and construction — all in-house, with weekly updates and a tiered warranty.

Everything under one roof

One team. Design, permits, and the build.

No architect to hire, no city to chase. From first drawing to final walk-through, one point of accountability: Avorino.

  • Custom architectural plans + structural engineering
  • Title 24 energy calculations, handled in-house
  • City submittals + plan-check corrections, managed by Avorino
  • One in-house team, weekly progress updates
  • Tiered warranty — 1-yr fit & finish, 4-yr systems, 10-yr structural

Foundation to finished

Watch an Avorino ADU come together.

Drag to compare — same build, start to finish.

A detached Avorino ADU — under construction and finishedFinished by AvorinoUnder construction

Why it converts to a calmer build

Avorino vs. the average builder.

AvorinoThe average builder
Who runs your project One Avorino team, design to final walk You juggle an architect, a GC, and subs
Your number Free written, fixed-price quote Vague ballparks, change orders
After move-in Tiered warranty — we take the call Good luck reaching them

Beyond ADUs

The same hands build custom homes, too.

★★★★★
I am so happy I used Avorino to build my two custom homes in Santa Ana. The team was absolutely amazing and made the whole process seamless and streamlined. The quality of work was absolutely fantastic and top notch all the way. Avorino treated my project as if it was their own and I knew I was in good hands — 10/10 experience.
S S. · Two custom homes · Santa Ana
★★★★★
Avorino built me a custom home. We loved how great they executed our project. We were impressed that they finished the project before the estimated timeline. They communicated every step. Love this company.
Hooman E. · Custom home · Orange County
★★★★★
Excellent job, and at a good price. We did a retile plus new fixtures and it came out looking like a high-end resort bathroom. The crew were hard workers and kept us informed each day — they even picked up the hardware for us, and came back on their own suggestion to fix a minor thing we'd hardly noticed. I would definitely recommend them.
Amy D. · Bathroom remodel · San Clemente
★★★★★
I used Avorino for my kitchen rebuild after a slab leak. They were awesome! It's so rare to find a contractor you have a good experience with. Very responsive, helpful, and understanding with my budget restrictions from working with insurance. They got the work done quickly and made sure every little detail was completed without me having to be on top of them.
Nikki B. · Kitchen rebuild · Laguna Niguel
★★★★★
I am extremely happy Avorino was referred to me. They were exceptional — the expertise, responsiveness, professionalism, cleanliness, creativity, and ingenuity are top of the line. Their work is so good and, most important, honest. They have a specialist in each field who always had a smart idea, which brought me peace of mind. I would recommend them for any kind of home work, especially a full remodel, which we did.
Boris B. · Whole-home remodel · Newport Beach
★★★★★
Avorino gave me the kitchen of my dreams. We'd lived in our home for 10 years wishing our kitchen was bigger and brighter with an island. I called contractors all over Orange County — I couldn't have made a better decision. So many of their suggestions made the final remodel more beautiful and more functional. Honest, easy to work with, always on time, and finished in record time. I've been getting so many compliments from family and friends!
Sonia H. · Kitchen remodel · Irvine
★★★★★
My first kitchen remodel and I was very nervous. From the first contact it was a smooth, professional experience — the quote was detailed and itemized, as well as competitive. The process was explained to me in detail, and everyone was courteous and punctual to a fault. They executed my vision in every detail. The work was completed in less time than estimated and perfectly within budget. I'm thrilled with my new kitchen.
Tina C. · Kitchen remodel · Dana Point
★★★★★
The easiest and friendliest contractors to work with. Avorino remodeled three bathrooms and an office in my house, and the results were absolutely amazing — my friends and family are in awe of the craftsmanship. Highly responsive, with weekly updates; I traveled internationally for business and they oversaw the site and updated me over Zoom. Even after passing inspection, they asked several times whether I was satisfied and fixed the minor items I raised.
Gurpreet S. · Three baths + office remodel · Orange County
★★★★★
Avorino is hands down the best around. We wouldn't trust anyone else, and haven't, with both our home and businesses. They're with you from start to finish and are incredibly helpful, communicative, and understanding. We've used Avorino for multiple projects at home and at our two businesses. We can't say enough good things about this team.
Kristle J. · Same builder, multiple projects · San Clemente
★★★★★
Excellent work, reliable — highly recommend them. They are very tidy and the results speak for themselves.
Ellen C. · General contracting · Orange County

No pressure. No surprises.

Your number is free. So is changing your mind.

  • A free written, fixed-price quote — yours to keep
  • No obligation, no call center, no sales pressure
  • Tiered warranty: 1-yr fit & finish, 4-yr systems, 10-yr structural
  • Financing available — pay it back from the rental income. See options →

Good questions

ADU questions, answered straight.

Most detached ADUs run about $245K–$440K+ depending on size, finish level, and your lot. The instant estimate above gives your ballpark in ~30 seconds; we confirm the exact figure with a free written quote.

Your ADU number is 30 seconds away.

Free instant estimate, a written quote texted to you, and a call only if you want one.