About Robert Stewart Architects

Robert Stewart Architects began building dreams more than 34 years ago in Long Beach, California.  We are now located in Old Town Tustin, strategically located in the heart of Southern California.  We provide comprehensive architectural services to a wide variety of ports and maritime, supply chain logistics, commercial, industrial, and residential clients.  Identifying needs and solutions and practicing strong client advocacy allows us to collaborate effectively with you and your contractor resulting in the type of award-winning projects for which Robert Stewart Architects is known.


We seek opportunities to incorporate sustainable strategies in every project we design.  We believe sustainable buildings maximize opportunities and can improve return on your investment, reduce operating expenses, and create an environment for happier, more productive occupants.

Principal Involvement
Robert Stewart, the principal of our firm, has made a conscious decision to maintain a firm of moderate size in order to provide direct personal involvement in each project undertaken by RSA, ensuring one-on-one client relationships that are critical to successful projects.

Robert is a licensed architect in California and is also a LEED AP.  Mr. Stewart has practiced architecture for over forty-five years following graduation from USC with a Bachelor of Architecture in 1971.    More

What We Do

End to End Solutions

Robert Stewart Architects provides the one stop to provide you with the architecture and engineering solutions along with the end-to-end management to make your project successful:

  • Anayizing your proposed site or building purchase
  • Helping you determine your needs and requirements
  • Schematic space planning and organization
  • Award-winning design
  • Develop realistic project budgets
  • Assemble the right team of consultants and specialists needed for your project
  • Technical Construction Drawings and Specifications
  • Acquiring planning and building construction permits
  • Bidding and construction management
  • Sustainable strategies
  • LEED® Certification
  • Commissioning and post-construction O&M operational manuals
  • And we manage the whole process!



Few clients have full-time resources to manage a construction project.  We offer Construction Project Management of the entire process and the project team from initial investigations through post construction.  As architects directly responsible for the design, engineering, permit acquisition, bidding and construction administration, we eliminate the additional layer of an outside construction manager, saving you extra costs and providing a streamlined process and single source responsibility to manage your project.  Read More



  • Needs and Options Review - Pre-Designosis™

At the start of every project the opportunities seem to be unlimited until various constraints focus them toward a solution. Needs and Options Review allows us to determine Client's functional, aesthetic, aspirational, operational, economic, and sustainabiity needs.  It also allows us to determine constraints resulting from zoning requirements, budget, property features, environmental conditions, schedule, etc.  Read more

  • Feasibility

We offer feasibility analysis that can answer critical questions early.  This can include evaluating whether a particular property or building you are considering purchasing can be developed to meet your project needs. Will the size of the property under consideration support required parking, zoning requirements, and the other project needs? Is the building for sale structurally sound? Is the budget sufficient to do all the things you want to do?

  • Programming

A "Program" document is a written roadmap used to guide the project. First, a Program is used to confirm with the Client their Needs and Options and the scope and scale of the project. Second, once confirmed, the Program is published for use by the entire design team to serve as an integrated checklist during design to understand the project goals and requirements, eliminating trial and error and miscommunication.



  • Conceptualization

Based on the Program, we explore arrangement options, change things around "on paper", resolving the Program elements into your conceptural solution. This process allows you to make choices at the beginning of the project when the opportunity for change is infinate and the cost to explore options is minimal.

  • Design

We define the size, shape, and massing of the selected concept and develop the look of the project by evaluating and selecting the supporting building systems and complementary building materials.

  • Construction Documents

We continue to develop the design into highly detailed technical drawings and specifications for use in permitting, bidding and constructing the project.  RSA teams with specialty consultants in the various fields of civil engineering, landscape architecture, structural engineering, electrical and mechanical engineering, each selected for the expertise they bring to the project.



  • Bidding Management

Solicit, on behalf of the client, construction bids and review and evaluate the bids in order to recommend the best qualified builder at the appropriate cost.

  • Construction Administration

Advise and consult with the client and act as liaison between the client and builder during the construction of the project.  Periodically review the construction progress to confirm the work complies with the design intent and with the construction contract requirements.  Acting as the client's representitive, administer the terms of the construction agreement.



We believe sustainable buildings maximize opportunities and can improve return on investment, reduce operating expenses, and create an environment for happier, more productive occupants. To this end, the Principal of our firm has become a LEED® Accredited Professional (AP).  RSA incorporates sustainable strategies in every project we design, and with in-house LEED® AP staff, we can also manage LEED® certification for clients seeking a LEED® certified project.

238 W Main Street,

Suite 202
Tustin, California 92780


562.595.0078 / 657.247.4881



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