When designing an office, it’s important to ensure that the workspace expresses the company’s culture and encourages collaboration. Enlisting the help of an architect will help you develop building systems that adapt to employees’ evolving needs. Doing so will turn your headquarters into a resource rather than just a destination.

The list below describes the best office architects in Riverside, California. These firms were selected for their accreditations, certifications, and professional affiliations. We also looked at each firm’s industry awards, client reviews, and press features. Below, we’ve discussed the range of services the firms offer, their specializations, and the length of time they have been in the industry.

LOHA: Lorcan O’Herlihy Architects

4106 West Jefferson Boulevard, Los Angeles, CA 90016

Lorcan O’Herlihy Architects (LOHA) is an award-winning architecture and urban design firm of twenty-five talented designers with offices in Los Angeles and Detroit. LOHA seeks to elevate the human condition via the built environment, operating on the belief that architecture functions within a layered context of political, environmental, and social structures. The firm works with a diverse group of stakeholders to deliver large-scale neighborhood plans, large mixed-use developments, supportive housing, and university residential complexes. LOHA has built over 100 projects across three continents and has been recognized with over 100 awards, including the American Institute of Architects (AIA), the California Distinguished Practice Award, and the AIA LA Firm of the Year Award.

Lorcan O’Herlihy, founder and design principal of LOHA, embraces architecture as a catalyst of change. Each project reflects Lorcan’s mindset that artistry and social connectivity are key to building vibrant spaces. The Architectural League of New York selected him as one of the eight “emerging voices” in the United States in 2006. 

Driven by O’Herlihy’s passion and creative vision, LOHA has built a robust portfolio of work that includes the Grupo Gallegos Creative Headquarters and Gym. The office’s vibrant colors engage with the adjacent coastal lifestyle. An amphitheater-stairway creates a transition between departments while providing a collaborative meeting and event space. The existing ticket booth was transformed into a juice bar, and mezzanine-level conference rooms hover over the open floor plan below.


1800 N Bristol St, #C-418, Santa Ana, CA 92704

ITZEN is well-known in Santa Ana, California for championing exciting and fun spaces by providing excellent architecture, interior design, project management, and graphic design services. It takes a holistic approach to design that fulfills client needs while emphasizing sustainability. As a company, ITZEN is committed to building places that enrich the lives of individuals and communities and will continue to do so for future generations.

Jana SB Itzen, AIA, is a graduate of Cal Poly San Luis Obispo. She also studied in Brisbane, Australia before founding ITZEN in 2011. She was later joined by her husband, William Itzen, AIA, who studied at Virginia Tech and Stanford University. Prior to starting ITZEN, the husband and wife spent over ten years contributing to significant projects at firms in Southern California and abroad.  Jana and William continue to build on ITZEN’s prowess in commercial design, resulting in the new offices for the Ameriprise private wealth advisors located in the heart of downtown.

The project consists of private offices and an open office financial workplace. The challenge for the project was determining how to separate the open, glass-walled executive offices from the “break room” while keeping the plan open. This difficulty was addressed by replacing a solid wall with custom fabricated metal screens that rotate on pivots installed in the floor and ceiling.  A high-end kitchen can be seen through the screens—an unexpected moment that pleasantly visually interrupts the corporate environment.

TR Design Group

2900 Adams St, Studio A-400, Riverside, CA 92504

The TR Design Group Architecture has produced award-winning structures and renovations throughout its 22 years in business. For example, the Tom and Vi Zapara new School of Business building at La Sierra University in Riverside, CA was named the 2014 Most Beautiful Business Building in the World. The school is 60,230-square-feet and includes features catering to business student needs. The project included an innovation lab for new product prototyping and 3D printing, as well as “Start-Up Garage” office spaces throughout the building. In one end of the building is a ”Pillar of Fire” light fixture meant to represent the Spirit of God filling the building.

Thomas Riggle, a nationally registered, NCARB certificate holder and a member of the AIA, heads the firm. Thomas maintains direct involvement throughout each project and works with his team of seasoned architects, most with over 40 years’ experience each. The firm is known for its strong development background, including planning, design and entitlements, and for producing high-quality construction documents that result in more precise bidding and fewer change orders. The firm’s industry sectors include church, civic agency, commercial, education, aviation, healthcare, and residential projects.

CO Architects

5750 Wilshire Boulevard, Suite 550, Los Angeles, CA 90036

A culture of discovery and cooperation distinguishes CO Architects as a pioneer in design and innovation. The firm specializes in architectural design, technical systems, planning, documentation, and project management carried out by a diverse team of professionals. CO Architects undertakes institutional, civic, academic, health sciences education, science & technology, and healthcare projects. Its staff has capabilities in programming, facility evaluation, comprehensive planning, and laboratory and medical planning. CO Architects puts its expertise into practice in order to craft spaces that benefit its users and their communities.

Jenna Knudsen, AIA, is the firm’s driving force as Managing Principal. Her career has focused on large-scale academic, laboratory, and healthcare projects on university and healthcare campuses across the country. She is an AIA member and a LEED Accredited Professional and is nationally recognized for championing BIM and integrated project delivery. Under her leadership, CO Architects has built strong ties with the Design-Build Institute of America (DBIA) and obtained Evidence-Based Design Accreditation and Certification (EDAC).

CO Architects is responsible for designing the LACMA (Los Angeles County Museum of Art) administrative offices. Flexible spaces facilitate a range of work functions and work styles and support opportunities for employee and staff connectivity. In addition to light-filled private and open offices, the design includes multiple gallery-type areas for rotating exhibits and abundant surfaces to mock up future exhibits, events, and graphics.


  • Blaine Comeione

    Blaine has served as Editor at General Contractors for six years, drawing from over ten years of experience in construction and real estate. His comprehensive understanding spans commercial construction, architecture, and home builds, cultivated through diverse roles in the industry. With four years at BuildZoom and a background as a licensed real estate agent, Blaine possesses a unique perspective that enriches his editorial work. His dedication to delivering informative content is underscored by his extensive tenure in the field, ensuring that readers receive valuable insights into the dynamic world of construction and home design. Expertise: Architecture, Commercial Construction, Home Design and Build Key Highlights: Over 6 years of experience writing and editing in the construction space, Editor at General Contractors, Previous experience at BuildZoom and Keller Williams Realty Education: Ohio University, Bachelor of Science in Human and Consumer Science - Minor in Business, 120+ Hours of New Jersey Real Estate Education, 120+ Hours of Arizona Real Estate Education