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Quality Prefab ADU Steel Homes for Every Need

Trusted Manufacturer and Distributor in Southern California.

Custom Steel Solutions

Tailored prefab buildings for your unique requirements.

Expertise in commercial and residential prefab metal buildings services.

Durable and reliable Prefab steel building ADU options available.

Commercial Projects
Residential Solutions
Click Here To Design Your Building!

About Us

With over 14 years of industry experience, we proudly stand as a leading prefab steel building manufacturer and distributor in Southern California. Our commitment to quality and innovation has allowed us to meet the diverse needs of our clients, providing customized solutions that ensure durability and structural integrity.

From residential to commercial projects, our steel buildings are designed to withstand the test of time while offering flexibility and cost-effectiveness. We prioritize customer satisfaction and work closely with each client to understand their vision and requirements.

As a trusted partner in construction, our expertise and dedication to excellence position us at the forefront of the prefab steel building industry in the region. Whether you are embarking on a new project or seeking to expand an existing one, we are here to support you every step of the way.

Click To Design Your Building!

Steel Building Solutions

Quality prefab steel buildings for commercial and residential projects in Southern California.

Prefab steel home
Prefab steel home
Custom Steel Structures

Tailored prefab solutions for your unique building needs and specifications.

Durable Construction Services

Expertise in commercial and residential construction with over 28 years of experience.

Reliable Distribution Network

Efficient delivery and distribution of prefab steel buildings across the United States.

Our Projects

Explore our diverse range of prefab steel building projects.

Prefab Metal Structure
Prefab Metal Structure
Commercial Prefab Structures

Innovative designs for various commercial steel building needs.

Custom Steel Home
Custom Steel Home
Residential Homes

Custom prefab steel homes built for modern living.

Industrial Facilities

Durable steel buildings for industrial applications and storage.

Agricultural Buildings

Versatile steel structures for farming and agricultural use.

More Prefab Store Models

Customer Reviews

See what our clients say about our exceptional steel buildings.

CNS Steel Buildings exceeded our expectations with quality and customer service. Highly recommended!

John D.
A modern, industrial-style building with a large overhanging metal roof structure. The structure is supported by a grid of steel beams and columns. Below the roof, there is a building with large glass windows reflecting a soft peach and blue sky. The setting appears to be an open, outdoor area.
A modern, industrial-style building with a large overhanging metal roof structure. The structure is supported by a grid of steel beams and columns. Below the roof, there is a building with large glass windows reflecting a soft peach and blue sky. The setting appears to be an open, outdoor area.

Los Angeles

Our prefab steel building was delivered on time and installed flawlessly, making our project a success. Thank you, CNS Steel Buildings, for your professionalism and expertise!

A silhouetted steel framework of a building under construction is set against a dramatic sky filled with textured clouds. Sunlight peeks through the gaps, creating a stark contrast with the dark structure. Silhouetted leaves and branches from nearby trees border the scene.
A silhouetted steel framework of a building under construction is set against a dramatic sky filled with textured clouds. Sunlight peeks through the gaps, creating a stark contrast with the dark structure. Silhouetted leaves and branches from nearby trees border the scene.
Sarah T.

San Diego

★★★★★
★★★★★