Accessory Dwelling Units In Buena Park

Homeowners in Buena Park looking for ADU Contractor don’t have to search any longer.
Our team has been a trusted option in the area for years, delivering excellent quality and satisfaction. By choosing us, you can avoid the stress of permits and construction problems, ensuring you get the extra space your family needs without any hassle.
Our experience with accessory dwelling units in Buena Park offers unique benefits that only skilled professionals can provide. By choosing to work with us, you can avoid the stress of bad workmanship and enjoy a well-made, functional space.
We are committed to quality, so you can enjoy your new unit sooner with the level of quality you expect and deserve.


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.
Benefits Of Working With Us
- Expert Craftsmanship
- Free Project Quote
- Friendly Team
- Transparent Communication
- Competitive Rates
- Timely Project Completion
Your Project Could Turn Out As Great As These
60+ projects done
100+ of families helped
1:1 approach to your project







Reviews From Buena Park Residents
M
Marco Urbana
Really good and professional company. I love the fact that they are bilingual several companies came our to give a estimate but they were by far the most qualified and did a great job.

Andrei Hienadz
I had a fantastic experience with Cornejos Builders! They exceeded my expectations in every way. From the initial consultation to the final walkthrough, their professionalism and craftsmanship shone through.
The Costs of Accessory Dwelling Units in Buena Park
Factors Which Can Influence The Costs Of Accessory Dwelling Units In Buena Park
- Size of the Unit: Larger ADUs cost more due to the increased materials and labor needed.
- Design Complexity: Custom designs with special features or unique challenges can raise the price.
- Materials Used: Choosing high-quality or specialized materials can increase overall costs but may offer better durability and appearance.
- Permitting Fees: The cost and complexity of obtaining permits can vary based on local regulations.
- Utilities and Infrastructure: Adding separate utilities or upgrading existing ones to support the ADU can affect the total cost.
- Site Preparation: The condition and accessibility of the construction site can impact initial groundwork costs.
On-Time & Within Budget
When we set a budget for your accessory dwelling unit project, we stick to it because we know how crucial it is for you to manage your finances without any surprises. You can rely on us to keep your budget under control from start to finish.
Meeting deadlines is also a priority for us. We plan carefully and work efficiently to ensure your accessory dwelling unit is ready before the expected completion date. Your satisfaction is our top concern, and we go the extra mile to make sure we finish on time, so you can start enjoying your new space as soon as possible.
Simple 3-Step Process For Succesful ADU Projects

Accessory Dwelling Units In Buena Park - FAQs
How fast can you build my ADU?
Most ADUs can usually be completed in about 90 days. However, this timeline can change based on the project’s size, complexity, and the materials and features you choose. We’ll give you a more accurate timeline after we examine the site.
Who will be working on my project?
Everyone who comes to your property is a trusted local worker. We only hire skilled professionals who are committed to your best interests.
Can I buy the materials myself?
Yes, you can, but if you purchase the materials yourself, the warranty will be voided. If we buy the materials and handle the installation, you’ll keep the warranty benefits, which can last from 1 year to a lifetime.
Will you provide a 3D design for my new ADU?
Absolutely! You can view a 3D model of your new ADU before selecting any materials or designs to ensure you’re completely satisfied with the upgrade. The 3D renderings are part of our design-build process to enhance your overall experience.
Is there a warranty?
Yes! You will receive a 1-year warranty on all new ADUs we build, along with a warranty on the materials we purchase and use. You can also count on our ongoing support, which means you’ll get priority assistance if you need our services again.
What does an ADU project include?
A new ADU in Southern California typically features a kitchen, bathroom, living room, washer and dryer hookups, and either one bedroom or a studio (depending on the size of the ADU). We handle everything to provide you with a ready-to-use ADU once it’s finished!
How much does an ADU cost?
Prices for Accessory Dwelling Units (ADUs) range from $80,000 to $250,000, depending on the size and scale of the project. It’s not wise to estimate the total cost roughly. It’s better to ask for a free quote, speak with our experts, and discover a realistic price for your upgrade.
Do I need a permit for an ADU?
Give Your Loved Ones The Space They Need

Alexsander Cornejos
Investing in an ADU contractor is a wise choice that you’ll value. It boosts the worth and versatility of your home.
Reach out to us at (562) 319-3178. The team at Cornejo’s Builders is ready to help make your project a success. Get started now to enjoy the benefits sooner.
Give us a call today!
Buena Park, located in the heart of Southern California, is renowned for its vibrant attractions and rich history. Home to the famous Knott’s Berry Farm, visitors can enjoy thrilling rides and entertainment. The historic Buena Park Historic District offers charming architecture and cultural insights, while the sprawling parks, like Craig Regional Park, provide ample recreational opportunities for families.