Home Builder

Build your new home with a reliable local expert here in Downey, San Marino, Rancho Palos Verdes, Newport Beach, Cypress, and more of Southern CA.

Scroll down to discover options, pricing, and process

Live In beautiful Space Designed exclusively for you

Building a home is a big step for many people, and it’s only natural you want what’s best.

With us, you’re guaranteed premium materials at better rates, a much easier construction process, and the best customer support here in Southern California.

Work with a team that just gets you, and watch your dream home come to life before your eyes.

Here’s what your new home includes:

Here's what your new home can look like

Frequently Asked Questions

It depends on the condition of the home being remodeled. The upside to building a new one is that everything can be made to match your needs, style, and preferences, and you’re not held back by anything.

A new construction of around 1,200 sq. ft. home takes about 4-5 months. We have a system in place where quality work is performed in a timely manner, so everything will turn out great, otherwise we’re not calling it a day until you love your new home.

You’ll enjoy a talented and reliable in-house team of installers, all committed to delivering the highest-quality product. Alexsander, the owner of Cornejo’s Builders, will also be on site frequently, but your own project manager will be there every day, making sure your new home comes out just as you envisioned.

A new custom home starts anywhere from $175,000 on the low end with utilities connected and $450,000 on the high-end. We can’t ballpark an estimate without knowing your vision. 

After the on-site visit, we’ll know exactly what goes into your project and you’ll get a precise pricing and timeline estimate that will be final.

Yes! Cornejo’s Builders Inc. handles all the paperwork for you. So the planning, permitting, design, and construction will be taken care of for you. All that’s left to do for you is sit back, relax, and enjoy seeing your new home being built.

Yes! You’ll get the materials warranty for everything that we buy and bring on site, warranty that goes for between 2 to over 50 years on certain materials. 

On top of that, you’ll enjoy our 1- year workmanship warranty that covers anything we install and work on. 

When you’ll call us to inquire about your project, we’ll talk over the phone for a while so I can discover some of your needs and what do you want to achieve with your new home. 

During the phone call, we’ll schedule an on-site visit to further assess the project and scope of work. After the visit, you’ll get a contract with a proposal for our partnership. After we agree on everything, the work on your new home generally begins in 3 to 10 days.

Because we don’t like to limit our clients and we want them to build their new homes wherever they please, we don’t buy the lots. 

We can build your home anywhere in Downey, San Marino, Rancho Palos Verdes, Cypress, Newport Beach, Whittier, Alhambra, and more of Southern California.

Home Building Cost In Southern California

Discover some insights about our past home-building projects here in Southern California. See what went into them, their cost, and more!

800 sq. ft. New Home in Montebello

This project included:
This project was quoted at $155,000, and the most expensive item was the Milgard French doors at over $13,000.

750 sq. ft. New Construction Unit in Los Angeles, CA

This project included:

This home building project was quoted at $175,000, where the most expensive item was the wood framing material, at $15,000.

682 sq. ft. Master Suite Addition in Long Beach, CA

This project included:

This project was quoted at $205,000, and the heated floors alone were priced at $15,000 for 620 sq. ft.

Remain In Control of Your Home Building Project

This process is meant to keep you in full control of your investment. We focus on efficiency, quality, and getting the work done in a timely matter. This 3-step process guarantees that.



Contact us and let’s plan your new home together.



Remain comfortable and on top of everything at all times.



Move into a turnkey new home and enjoy every second of it.

Work Backed By The Biggest Names In The Industry

Get the best materials in your new home and enjoy a quality, one-stop-shop building service. Your new home project is in the best hands possible!
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Lanny Lam​


Cornejo’s Builders did an amazing job remodeling our kitchen. Alexsander made this experience one of a kind, he was accessible and flexible throughout the process. 

This guy’s knowledge truly guided us to perfect our dream kitchen. He has endless recommendations. The workers were efficient. We appreciate how he handled minor changes we had with professionalism. 

After getting work done by different General Contractors, Cornejo’s Builders definitely sets the bar for the rest. Thank you, Alexsander.


Lety Ortega​​​


Called Cornejo’s Builders after seeing their beautiful work on Tik Tok. Spoke to the owner regarding an ADU project. Alex always returned my calls, explained throughly how the project would be completed. 

Love how his company is an all in one stop. They definitely handle everything from getting permits, architect, plumbing, electrical etc. Turn key ready, his prices are very reasonable and is willing to work around your budget

Alex was very understanding when I explained why I had to put a hold on the the project. He definitely treats his customers like family.


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.

A Home Builder Who Puts You Front And Center

Fully experience the joy of building your own home with a professional home builder who focuses on you. Enjoy a seamless and stress-free process that ends with your satisfaction. 

Start your project in as quickly as 3 days after our visit, and get the job done in record time without compromising anything.
Get the best rates on materials and a service reflective of the high-quality craftsmanship you’ll enjoy.

Remain in full control of your project with a dialed-in process that focuses on you, your family, your time, and investment.

Start Building The Home You've Always Wanted for Your Family

(takes 1-2 min)