Wrenwood O'Brien Construction Inc., serves the San Francisco and Marin areas. Owners Sean O'Brien and John Towey have extensive experience in their own right in the construction trade both in America and Ireland. They entered the construction trade as teenagers in Ireland before moving to America where they continued with their passion of working in the industry, both individually gaining more experience and reaching their goal as General Contractors with a solid customer base.

They decided to combine their skills and knowledge and so Wrenwood O'Brien Construction was formed. As a team they have different qualities and resources that make this company both dependable and personable in their relationship with their customers and vendors.

Wrenwood Obrien Construction Inc., has a team that concentrates in concrete work, foundation, garages, sidewalks and stairs and as well as a highly experienced team for re-models, extensions and new builds from start to finish.