Structural Safety Starts Here
Soft-Story Retrofits, Balcony Repairs & Custom ADUs—Done Right
CalPrime is your trusted construction partner for code-compliant retrofitting, safe and durable balcony restorations, and fully permitted ADU builds. We bring engineering precision, seamless project management, and expert craftsmanship to every job—big or small.
Structural Expertise
From seismic retrofits to ADUs, our licensed team combines engineering knowledge with hands-on construction experience for safe, code-compliant builds.
End-to-End Service
We manage everything from inspections and permits to final finishes—streamlining the entire process with clear communication and no surprises.
Trusted & Local
Proudly serving the Greater Los Angeles area with a reputation built on quality, integrity, and long-lasting results.
CalPrime Services
Expert Construction Services That Strengthen, Improve, and Expand Your Property
Soft-Story Retrofit
In earthquake-prone regions like Southern California, soft-story buildings—those with open ground floors and weak lateral support—pose serious risks during seismic events. These structures are especially common in older apartment complexes and multi-unit dwellings with tuck-under parking or open storefronts. CalPrime specializes in soft-story retrofitting to bring these vulnerable buildings up to modern seismic safety standards.
Our process starts with a comprehensive structural assessment, followed by detailed engineering plans designed to meet or exceed local retrofit ordinances. We handle permitting, construction, and final inspection—ensuring your property is both compliant and structurally sound. With experience navigating local building codes and inspection protocols, our team makes it easy for property owners to fulfill their obligations without unnecessary delays or complications.
Retrofitting isn’t just about code compliance—it’s about protecting lives, assets, and long-term investments. CalPrime takes pride in helping clients improve their properties’ safety and value with minimal disruption to tenants or businesses. If your building is under retrofit mandate or if you simply want peace of mind, we’re here to guide you every step of the way.
Balcony Repair & Reconstruction
Balconies add beauty and value to any property—but when poorly maintained, they can quickly become a safety hazard. Water intrusion, wood rot, and outdated construction methods can compromise a balcony’s structural integrity, putting occupants and owners at risk. At CalPrime, we offer expert balcony inspection, repair, and reconstruction services tailored to California’s latest safety standards, including SB326 compliance for multi-family residences.
We begin each project with a detailed on-site evaluation to identify the root cause of the damage—whether it’s dry rot, rusted hardware, or compromised waterproofing. Once assessed, our team develops a tailored repair or reconstruction plan that addresses both structural and aesthetic concerns. We use top-quality materials and proven techniques to rebuild balconies that are not only safe, but also durable and visually consistent with the rest of the building.
Our work doesn’t stop at repairs. We make sure your balcony meets modern safety codes and passes all necessary inspections, helping you avoid fines and liability down the line. Whether you’re a homeowner, HOA, or property manager, CalPrime provides peace of mind with professional balcony restoration that lasts.
ADU Construction
Accessory Dwelling Units (ADUs) are one of the smartest ways to expand your living space and increase property value—whether you need a rental unit, guest suite, or private home office. At CalPrime, we specialize in building fully permitted, custom-designed ADUs that blend seamlessly with your property and meet all California building codes.
From the start, our team helps you navigate the complexities of zoning regulations, lot setbacks, and utility hookups. We handle design, engineering, permitting, and full construction—offering you a streamlined, stress-free experience. Whether you’re looking for a detached backyard cottage or a garage conversion, we tailor every ADU to your lifestyle, budget, and long-term goals.
Unlike mass-produced solutions, CalPrime’s ADUs are built with quality and longevity in mind. Our in-house team ensures attention to detail at every phase, using durable materials, modern finishes, and smart layouts. With the housing market evolving and space at a premium, a custom ADU is a future-proof investment—and we’re here to help you bring it to life.
Our Clients
Trusted By Over 500 Homeowners & Companies
About Us
Built on Integrity. Driven by Precision. Focused on You
“We don’t just meet code—we build with purpose, precision, and pride.”
At CalPrime, we’re more than contractors—we’re structural problem solvers. With deep roots in the construction industry and a passion for safe, code-compliant design, we specialize in Soft-Story Retrofits, Balcony Repairs, and ADU Construction across Los Angeles. From initial inspection to final sign-off, we’re committed to quality craftsmanship, clear communication, and lasting results. Our licensed, bonded, and insured team takes pride in doing the job right the first time—because your property deserves nothing less.
Farzad Sepehreh
Vice President at CalPrime
CSLB License # 1141734
We are fully licensed and committed to delivering quality work you can trust. CalPrime Construction proudly holds CSLB License #1141734, ensuring every project meets California’s strict standards for safety, craftsmanship, and professionalism.
CALPRIME Team
We have talented and creative engineers
Our Mission
To strengthen and protect the homes and buildings of Southern California through expert engineering, high-quality construction, and unmatched service. We’re committed to delivering smart, safe, and lasting solutions—one project at a time.
Our vision
To become the go-to structural construction partner for homeowners and developers across California, known for our precision, integrity, and ability to turn complex challenges into confident solutions.
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Booking For Project
Ready to Get Started? Book Your Free Consultation Today
Whether you’re retrofitting a soft-story building, repairing a damaged balcony, or building a new ADU, our team is here to help. Schedule a no-obligation consultation and let us walk you through your options with clear guidance, expert insight, and full transparency.