Ransome Company, founded in 1870 under the leadership of E.L.Ransome, was a pioneer in the use of concrete and paving construction methods in California. His invention and subsequent patent (US Patent 305,226) of the reinforced concrete construction system known as “the Ransome System.” The system called for twisted steel bars to be interwoven with concrete to increase its strength, a revolutionary idea at that time, but one which is now commonplace (now known as “rebar”). The system allowed for the use of concrete in construction of multi-story buildings, bridges, and other structures traditionally thought more suitable for steel or wood construction.

Many buildings and bridges constructed by Ernest Ransome using the Ransome System still stand around the United States today, while reinforced concrete construction is quite literally the foundation of the developed world.

More than a century later, some of San Francisco’s original sidewalks and lighting still stand in testament to the quality of our work. Ransome Company remains dedicated to the exceptional quality, innovation and efficiency we've demonstrated over the years, and today is one of northern California’s leading single-source providers of engineering construction services.

As a full-service grading, paving, concrete and underground utility contractor, we’ve completed thousands of custom projects for state and local utilities, major corporations, other general contractors and local and federal government agencies. Many of our current clients first hired us more than 50 years ago. Just as they've counted on us to maintain our high standards over time, clients joining us today can rely on our expertise to meet an ever-growing range of infrastructure needs.