About Us
Rooted in legacy, built for the future.
We are a family-owned and operated general contracting company proudly serving the San Francisco Bay Area. Founded during the pandemic by cousins, the company honors the legacy of Thomas Walsh Senior, a San Francisco native who ran a respected construction business for decades. With a deep-rooted passion for craftsmanship and decades of combined experience, On Square Construction carries forward that tradition of excellence.
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From residential remodels to commercial builds, we specialize in delivering high-quality construction solutions tailored to each client’s vision. Whether it’s a kitchen upgrade, a bathroom renovation, or ground-up new construction, we bring expertise, reliability, and care to every project.
Our Mission
We aim to build lasting value for our clients. We are committed to delivering exceptional craftsmanship with integrity, innovation, and uncompromising quality. Every project is a partnership, and we strive to create spaces that not only meet our clients’ needs but also enhance the communities we serve. Above all, we prioritize safety, professionalism, and a customer-first mindset in everything we do.