California's leader in safety, quality, and performance

We understand that complicated, modern process piping and mechanical system jobs require fresh thinking, cutting-edge technology, and diverse skills and market expertise. Our California office is dedicated to providing quality results on every project, every time.

Comprehensive services

Your modern mechanical construction projects deserve groundbreaking thinking that delivers results. Discover end-to-end solutions grounded in collaboration, safety, and eight decades of proven expertise.

Concrete Installation

A rock-solid foundation for your project—any size, any place. Expert prep and pour for performance you can count on.

Design Services

In-house design-assist services lower costs, boost constructability, and reduce overall schedules for success from the very start.

Equipment Installation

Decades of experience with the most demanding equipment challenges means we get the job done—and we mean the whole job.

Process Piping

Powering innovation and infrastructure for every industry. Specialized systems you can rely on for the long haul.

Service Department

Our dedicated service team will work with you to create a customized maintenance plan that satisfies the needs of your facility.

Sheet Metal

Harder's sheet metal division provides complete HVAC and industrial duct fabrication and installation for all major industries.

Structural Steel

Strong, safe, secure—infrastructure that holds to the highest standards. Discover workmanship backed by 80 years of experience.

Tank Installation & Modification

Smooth, disruption-free service for every phase of your project. Our expertise guarantees safety and success.

Virtual Design & Construction

State-of-the-art tech for designs that deliver. We combine leading-edge tools with decades of experience to envision and execute with excellence.


Chevron Refinery Turnarounds

Our team planned and executed back-to-back pull feed dates for two key projects: the Eight Plant Turnaround and the #2 Sulfur Recovery Unit (SRU) Turnaround.

California industry expertise

Harder Mechanical designs and builds sophisticated, modern mechanical solutions using bold thinking, process innovation, and continuous improvement practices that tackle the industry's most complex construction challenges.

Start the conversation

We understand the unique challenges of building in the California environment. Find out how our go-big, go-bold approach can make your next project exceed every expectation.

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California Office

Contact Info

(510) 620-9351


999 Canal Blvd, Building Suite C, Richmond, CA 94804

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When it comes to talent and teamwork, we go harder than anyone. Join the team that sets the bar for excellence.