Castor Architecture is based in Mill Valley, California, with projects from Marin County and the Wine Country to San Francisco and the Peninsula, Southern California and beyond. For the past 20 years we have specialized in custom, single-family residential design, ranging from the construction of new homes on open land to the renovation of existing structures in urban settings.
More recently, our body of work has grown to include mixed-use, multi-family, affordable, and manufactured/modular housing. We are happiest when presented with challenging assignments. Difficult parameters encourage responses that are authentic rather than generic, personal rather than "perfect". Instead of employing a signature style, we relish the freedom to create unique connections to specific places.
More recently, our body of work has grown to include mixed-use, multi-family, affordable, and manufactured/modular housing. We are happiest when presented with challenging assignments. Difficult parameters encourage responses that are authentic rather than generic, personal rather than "perfect". Instead of employing a signature style, we relish the freedom to create unique connections to specific places.
Reviews (6)
Artem Shnayder
Sep 15, 2021
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I'm looking to buy a house in Marin County. I wanted to talk to an architect to make a more informed buying decision. So, somewhat randomly, I called Daniel. He took the time to give me a rundown of things to look for and things to watch out for when buying a house in Mill Valley. He was very honest, patient, and informative. I'd love to work with him in the future. Thanks for your help Daniel.
James Nicholson
Apr 28, 2021
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Tom Ganley Construction
Aug 11, 2020
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Positive: Professionalism, Quality, Responsiveness, Value
Daniel Castor and I have worked together on a couple of residential projects in Mill Valley. It was a pleasure working with Daniel, we were great at resolving issues and working as a team, and I would highly recommend Castor Architecture for projects that require construction phase architectural design services.
Daniel Castor and I have worked together on a couple of residential projects in Mill Valley. It was a pleasure working with Daniel, we were great at resolving issues and working as a team, and I would highly recommend Castor Architecture for projects that require construction phase architectural design services.
Jodi Schwartz
Aug 03, 2020
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Daniel Castor did a re-design of our 1950s home in the Mesa neighborhood of Palm Springs — to open it up, modernize it while retaining its mid-century vibe, and add great exterior living space. He did a superb job of executing both on ideas that we communicated and adding features and improvements that we never imagined but are now key to our enjoyment of the house.
Jacob Lehrbaum
Dec 21, 2019
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Daniel and his team did a fantastic job helping us through a recent project in Tiburon to remodel and modestly expand our 1960s mid-century home. Daniel was referred to me by my original architect who retired mid-project. Despite inheriting an initial design, Daniel rapidly got up to speed and helped us complete the project, navigating reviews with the building department, permits, as well as some additional alterations after we got started.
Throughout the process, Daniel always kept us up to speed with his progress, timelines, and decisions that we needed to make. His communication was clear
Throughout the process, Daniel always kept us up to speed with his progress, timelines, and decisions that we needed to make. His communication was clear
Jodi Riviera
Dec 17, 2019
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Daniel Castor of Castor Architecture was the perfect person to guide the remodel of our unique home, a former church in Mill Valley. Our project included the full remodel of the kitchen/sanctuary space and three bathrooms, a reconfigured entry, and the addition of a new guest bath. He understood our desire to capture the history and character of the space and brought creative ideas, unique solutions and a steady, thoughtful presence to the process.
Daniel collaborated beautifully with our contractor, interior and landscape teams, and engineering consultant and managed the permitting process with
Daniel collaborated beautifully with our contractor, interior and landscape teams, and engineering consultant and managed the permitting process with
