O’Sullivan Architecture is a San Francisco based practice established in 2006. Our goal is to create an appropriate and specific solution for each design through client involvement and a response to the nature of each site. We see the design process as a collaboration between owner and architect, this dialog leads to innovative solutions tailored to the clients’ needs and expectations. O’Sullivan Architecture seeks to build a committed and communicative design and construction team to ensure aesthetic, constructability and budget concerns are addressed at all stages.

We believe that a design is only appropriate if it is achievable and properly constructed. Our process involves coordination with planning and building departments to ensure the entitlement process is as clear and painless as possible. We take great care to detail and document our designs and to provide informed and experienced construction administration.

Sustainable architecture should be timeless and appropriate architecture rooted in its site and context. A building built to last, function efficiently, and adapt to changing needs is sustainable. A remodel can sustainably extend the life of an existing building by giving it a new relevance. Our studies in Environmental Resource Management give us a deep understanding of this issue and help us in our goal of creating timeless, rooted and appropriate architecture.

Killian O’Sullivan AIA, CA Lic# C-30355
Killian is originally from Co. Kerry, Ireland. He completed his five year professional degree in architecture at the Dublin Institute of Technology and Trinity College Dublin before attending University College Dublin to complete an MSc in Environmental Resource Management with a thesis on Houses in Rural Landscapes. Killian moved to the United States in 1994. Prior to establishing O’Sullivan Architecture he was employed at architecture firms in San Francisco including Gensler and BraytonHughes Design Studios where he was a vice-president.