Timeline Design + Build is a residential architecture and construction firm based in Saratoga, California, serving communities throughout Silicon Valley. Founded by Matthew Harrigan in 1990, the company has completed over 130 residential projects, ranging from new custom homes to large-scale remodeling work for homeowners across the region.

The firm operates as an integrated design-build company, bringing architecture, interior design, construction, project management, and estimating together within one organization. Its process spans architectural design, feasibility studies, permitting, interior selections, construction, and project delivery, covering custom home construction, whole-home renovations, additions, and boutique remodeling across a range of residential styles, from traditional to contemporary.

Timeline Design + Build serves homeowners in Atherton, Los Altos, Los Altos Hills, Los Gatos, Menlo Park, Monte Sereno, Palo Alto, Portola Valley, Saratoga, Woodside, and surrounding Bay Area communities.