A2R Architects was formed in April 2014 by Robert Henley, AIA, LEED AP and Robert Sesar, RA. Formerly of Henley Architects + Associates and RSA Architecture, the two Principals have 70 years of combined architectural experience in Northern California. Located in Vacaville, California, A2R provides architectural design expertise for a wide range of project types along with a full spectrum of professional services.

The firm’s culture values integrity, trust, and commitment. We are dedicated to achieving our clients’ vision, and our design solutions reflect a clear understanding of their goals and objectives. In collaboration with our clients and consultants, we create buildings and spaces that promote social interaction, comfort and productivity with outcomes that respect our environment.

A2R is dedicated to maintaining the highest degree of responsiveness to our clients. Achieving excellent architecture for them within reasonable and predictable budget and schedule expectations is more than a goal—it is the cornerstone of our business philosophy and the foundation for our success.



Discovery, collaboration and effective communication form the foundation for our work. We actively engage our clients in the design process, encouraging open dialogue and creative input to gain a thorough understanding of their goals and objectives.

We intensively research site culture and history to produce architecture that exists in harmony with its natural surroundings and the community it impacts. Our projects respond to local climate and relate well to their environment through the use of regional materials. We explore spatial planning and building design, formulating multiple design solutions through sketches and modeling.

We believe that sustainability is one of the greatest challenges of our generation. As stewards of the environment, green principles are fundamental to our approach as we seek to reduce consumption of non-renewable resources, minimize waste and create healthy, productive environments. We further this objective by collaborating with others who demonstrate this same commitment.

We strive always to achieve an optimal balance of cost, environmental, societal and human benefits while meeting our client’s mission. 

As a full-service design firm, A2R Architects provides expertise in planning and programming, architectural and interior design. Our thorough knowledge of construction, technology and materials, coupled with our years of architectural design and project management experience, allows us to smoothly guide projects throughout the process to assure optimal results—quality architecture produced on-time and on-budget.

Services include:

  • Programming and Needs Assessment
  • Master Planning
  • Sustainable Design
  • Building Design
  • Interior Design
  • Construction Documents
  • Bidding
  • Construction Administration
  • Post Construction Evaluation
Rob Henley

Rob is widely recognized for his highly responsive, collaborative approach and effective leadership. His 40 years in architecture in Northern California include 17 years with TLCD Architecture, a multi-disciplined firm, where he was Senior Principal and Principal-in-Charge of TLCD’s Solano County (Fairfield) office from 1998 to 2009. He served as Principal of Henley Architects and Associates from 2009 until the formation of A2R Architects in 2014.

As a LEED Accredited Professional, Rob is a strong advocate for responsible design and development, integrating sustainable strategies as a fundamental part of A2R’s design process. Rob studied Architecture at UC Berkeley and completed a Masters Program in Green Building at San Francisco Institute of Architecture. Rob’s professional associations include American Institute of Architects (AIA), U.S. Green Building Council (USGBC) and Coalition for Adequate School Housing (CASH). Rob is also an active member of the Fairfield-Suisun Rotary Club.

Rob Sesar

Rob has a diverse and outstanding background in both planning and architectural design and, with 30 years of architectural experience, has a multitude of commercial, educational, and religious projects in Solano County to his credit. His experience as project manager and cost estimator brings an exceptionally keen awareness of construction costs, schedules and techniques to the projects he leads. Rob’s ability to meet budget constraints and create efficient design has been an important factor in maintaining a strong base of longtime clients.With his expertise in computer software systems, Rob also oversees A2R’s technical support team in computer scheduling, estimating and the preparation of construction documents.

Prior to forming A2R Architects in 2014, Rob was principal of his own firm, RSA Architecture, for 18 years in Vacaville, CA. Rob holds a Bachelor of Architecture degree from the University of Oregon. He is an active member of the Vacaville Rotary Club and Vacaville Chamber of Commerce.

A2R ARCHITECTS  • 190 S. ORCHARD AVENUE, SUITE C250  •  VACAVILLE, CA 95688  • 707.453.0196
Serving Northern California: Antioch, Benicia, Concord, Davis, Dixon, Fairfield, Martinez, Napa, Rio Vista, Sacramento, Sonoma, Suisun City, Vacaville, Vallejo, Walnut Creek  •  © 2020 A2R Architects