ADU Contractor in Pico Rivera, CA
If you’re thinking about adding an ADU installation in Pico Rivera, you’re probably trying to balance space, budget, and not losing your mind in the process. We totally get it. Whether you’re building a rental, a spot for family, or just need a quiet place to work, we’ve helped people in your exact shoes make it happen. Over the past four years, we’ve built 24 ADU
s right here in the community. We move fast, keep you in the loop, and treat your home like it’s our own. From the ground up, we deliver solid, thoughtful work, with clear communication, attention to detail, and just the right amount of humor to keep things light.
Alexsander Cornejo – Owner of Cornejo Builders
Hi, I’m Alexsander Cornejo, the owner and founder of Cornejo’s Builders. I started working in the remodeling and construction industry right out of high school, in 2009.
With Cornejo’s Builders, the goal is to give back to the city I grew up in. I want to send a message of hope and inspiration: any dream can be achieved, no matter where you come from, if you put in enough work and dedication.
Unmatched Benefits For Your Convenience
Our exceptional service level and benefits have revolutionized the accessory dwelling unit industry, setting unprecedented standards for quality and satisfaction.
Discover the difference by seeing the benefits we offer:
- 5-Year Workmanship Warranty
- Free Project Quote
- Fast Completion Timelines
- Transparent Communication
- Competitive Rates
- Quick Project Completion
What People in Pico Rivera, CA Say About Us
Want to know what it’s like working with us? Don’t just take our word for it—read what your neighbors have to say about building their ADU with Cornejos Builders.
J
Jenna Laricchia
Cornejos Builders Inc did excellent work for my kitchen remodel project.
I really appreciate Alex efforts in fulfilling my goals, not to mention I had fun working with the team who gave me excellent quality service and ideas for my project. I am extremely satisfied; not to mention the reasonable timeline to finish the job with no hassles.
I wish Cornejos Builders Inc great success! I highly recommend Cornejos Builders Inc to anyone who is looking to get construction work done.
Y
Yahritza Orellana
Had a truly great experience with Alex. Cornejo’s Builders just completed converting my crawlspace/basement into an ADU (studio with new bathroom and kitchen).
What made the experience even more valuable was that the owner himself (Alex) came over for a consultation. Other companies just send their sales reps and most of the time they don’t even know anything. Feeling important is always a positive I can’t wait to work with them again.
I highly recommend them. You can tell Alex is passionate about what he does, his clients, and his company.
How Much Does ADU Contractor Cost in Pico Rivera, CA?
ADU contractor costs in Pico Rivera can vary depending on size, layout, and the details that matter most to you. Every project is different, which is why the best way to get a clear idea of what yours might cost is to schedule a free on-site consultation. We’ll walk the property, talk through your vision, and give you a realistic plan—no guesswork, no pressure.
| Project | Included | Total Cost |
|---|---|---|
| Alhambra, CA (735 sq. ft.) | New foundation, plumbing, electrical, HVAC, Spanish style finishes, custom kitchen cabinets, separate utility connections | $250k |
| Whittier, CA (535 sq. ft.) | Central AC, open concept kitchen/living room, rental income property, custom finish bathroom tile, vinyl engineer flooring, level 5 drywall finish | $150k |
| Downey, CA (798 sq. ft.) | Vaulted ceilings, level 5 smooth finish, exterior stucco with smooth finish, customized electrical smart home finish, curbless walk-in shower, central AC | $200k |
Factors Which Can Influence The Costs Of Accessory Dwelling Units In Pico Rivera
- Size & Layout
- Site Conditions
Sloped lots or access issues can increase prep time.
- Utility Connections
If your lot needs major electrical, sewer, or water work, that affects pricing.
- Finish Level
Basic finishes cost less than high-end, custom features.
- Existing Structure
Converting a garage is often less expensive than building from scratch.
- Utility Connections
Budget-Friendly & On-Time Completion
We know the idea of building anything, let alone something as involved as an ADU, can feel like a lot. We respect your budget, your home, and your timeline.
Budget
Think of it as more than just a build but more of an investment in comfort, flexibility, and how you live every day. The value adds up long after the project’s done.
On Time
We don’t ghost, we don’t stall, and we don’t leave a mess behind. We hit deadlines, keep you updated, and stick with you through the punch list.
Our ADU Contractor Process
We’ve made ADU installation in Pico Rivera easier, clearer, and way less stressful than you’re expecting.
1
Collaborate
We walk your lot, talk through ideas, and handle permits.
2
Build
Our crew gets to work—on time, on task, and respectful.
3
Enjoy
Your space is ready. No clutter, no delays—just keys and comfort.
FAQs About ADU Contractor in Pico Rivera, CA
How long does an ADU take to build?
Most of our ADUs take 3–5 months, depending on size and scope. We’ll give you a clear timeline after your site visit—and we stick to it.
Do I need permits for an ADU in Pico Rivera?
Yes, and we handle the permitting process for you. We know the local requirements and have good relationships with city inspectors, so we keep things moving.
What kinds of ADUs can you build?
Granny flats, garage conversions, bump-outs, second-story additions—you name it. We tailor each build to your space, needs, and goals.
Will an ADU increase my property value?
In most cases, yes. A well-designed, code-compliant ADU can boost your home’s resale value and generate long-term income if used as a rental.
Partner with Cornejos Builders for Your ADU
Alexsander Cornejos
Let’s build the ADU that makes your lot more livable, now. Call (562) 319-3178 or message us here. Prime start dates go fast, and every week sooner means one week closer to move-in.
We’re experienced ADU contractors who care about the quality of your space and the experience of getting there.
Let’s make something that works for the way you actually live.
Pico Rivera, CA is a diverse, family-friendly city just southeast of Los Angeles, known for its community roots and suburban charm. Formed in 1958, it blends residential living with cultural vibrancy and convenient freeway access. Visitors often check out the Pico Rivera Sports Arena for concerts and Mexican rodeos, or unwind at Whittier Narrows Recreation Area, with its lakes, trails, and open green spaces.