We create well crafted and meaningful architecture. Our work is in the city, in town and in the country. We define ourselves by delivering projects which are beautifully conceived and deftly built, creating structures that age with grace.

Group Photo

Richardson Pribuss Architects creates coherent, sophisticated site-sensitive design. Our focus is neither on the scale nor scope of the program, but on the opportunity to enrich our clients’ daily lives with considered solutions that marry what is desired with what is required. Similarly, we strive to enhance the site and neighboring context both through intelligent design as well as with sustainable solutions. We are known for architecture that is built on honest and patient dialogue with our clients and for trusted partnerships with our team of consultants, artisans and builders. We believe in creating valued relationships that continue to be cultivated over time.

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About RPA

Richardson Pribuss Architects is an architectural and interior design firm focussing on residential and commercial projects throughout Marin County and the greater Bay Area. Established in 1984 by Heidi Richardson and renamed in 2019 to reflect the partnership of long-term Design Director Andrew Pribuss, the Mill Valley-based firm is known for navigating complicated zoning and permitting constraints to create timeless designs; be they ground up houses, construction on challenging hillside sites, or renovations of any scope.

The company we keep.

Consultants & Contractors

Successful projects are designed to meet our clients’ programmable requirements and less tangible aspirations, as well as meet their budget and schedules. Our ability to successfully and efficiently navigate the approval process in various jurisdictions is one of the hallmarks of our practice. We have averaged over 25 client ‘Design Review’ successes annually, through the various Marin town and city municipalities. Direct and open communication with the municipalities and other stakeholders is key.

We have assembled a team of consultants with whom we meet bi-weekly to review project scheduling, client expectations, as well as taking a Team approach to problem solving. This well-oiled machine keeps project schedules on track. Our clients benefit from this seamless coordination. In addition, we have a group of builders at hand who can assist with an early budgeting exercise.

We have been in business (in one form or another) since 1984. One reason we thrive is the company we keep and their passion for building honestly and respectively.

Artist Studio at Dusk.

Cottages, Cabins, Tiny Houses, ADUs

In an attempt to increase affordable housing units, the State of California has relaxed local standards on accessory dwelling units (ADU’s). This legislation came into effect January 1, 2020. The new legislation is still evolving and we are following the changes.

Over the past 12 years, we have designed over 25 of these units, some embedded in new residences, but most are freestanding. The need for small houses has been apparent for some time, whether it is intended for a caregiver, aging parent, boomerang children or as a steady income stream.

The design of efficient small houses demands deft handling of details, spatial organization and interconnection, and must also resonate with the individual setting. We have experience and expertise in this area and recently were asked by the San Joaquin County to produce a pattern book of designs with are building permit ready. We are currently exploring the use of modular or prefabricated pieces in order to lower construction costs.

Firesafe Design Photo

Firesafe Design

With the devastating wildfires of the past two years, we believe architects should take the lead in means and methods for firesafe design.

These strategies include not only awareness of the latest material technologies, but also siting for new houses, as well as the “spaces in between.” Designing building forms which are formally less complex will be the new normal. Managing vegetation and strategies for defensible space in wildland areas, as well as suburban properties, is crucial.

Negotiating these requirements with other municipal mandates such as Historic Preservation, Design Review Guidelines and Green Building Techniques, can be a challenging path for the uninitiated. We have been successful in this balancing act in the past few years and continue to sharpen our skills in this area.

We currently have an all-concrete guesthouse under construction in Petaluma, as well as three new firesafe houses underway in Mill Valley.

The scale of our office allows for an honest team approach, sharing the talents and knowledge from our versatile group with every client.

  • Heidi Richardson

    Heidi Richardson

    Principal, Architect

    Heidi Richardson is involved in every phase of design: from site strategy to municipal approvals, to management, lending consistency and efficiency to the process. The result of this attitude has been numerous awards in historic preservation, interiors, seismic renovations, and in the role of Project Architect for several associations with internationally known architects. Her work has been published widely in Architectural Record, Architecture, House and Garden, Home, and Sunset Magazine among others.

  • Andrew Pribuss

    Andrew Pribuss

    Principal, Architect

    Andrew enjoys working closely with clients to create not only a pleasing, creative design solutions, but to ensure the process is as enjoyable as the finished product. He is also interested in the expanding variety of sustainable building practices that are developing in the field and incorporating them into his practice.

  • Graham Bigelow

    Graham Bigelow

    Interior Designer

    Graham has experience leading efforts from the development of the design concept, implementation, and installation. He enjoys working with clients to achieve their interior design goals on time and on budget.

  • Susan Schippmann

    Susan Schippmann

    Senior Interior Designer

    Susan’s body of work includes custom homes, new construction and remodeling in the Carmel Valley, Hawaii, Connecticut, Healdsburg and San Francisco areas. Her approach to design is that design balances functionality with personal expression. Recognizing the intimate relationship between the architecture and the life that dwells inside is the key to a timeless design.

  • Colleen Paz

    Colleen Paz

    Senior Designer

    Colleen is a forward-looking designer, constantly exploring new forms and new technologies. She enjoys working with clients and coming up with creative design solutions and is never shy to work with her hands (or on a computer).

  • Jack Dakin

    Jack Dakin

    Senior Designer

    Jack addresses projects holistically, working from start to finish on concepts, tackling everything from scouting locations, naming and branding, solving water pressure problems, and interior design. Jack has led a string of successful launches, ranging in scope and scale from large hospitality projects to intimate restaurants.

  • Jamie Amdurer

    Jamie Amdurer

    Senior Designer

    James has a passion for detail, a deep knowledge of building standards, and a keen understanding of how these parts make up the whole.

  • Mehgan Francis

    Mehgan Francis


    Mehgan brings a strong understanding of the built world to projects while working as a residential carpenter in Maine while earning her degree. She has refined and developed her design approach and experience to adapt to west coast styles and standards after moving to Sonoma recently. She brings with her a passion for problem solving and is dedicated to creating designs based on how people truly interact with the space – “designing for how people actually live”. Mehgan enjoys helping individuals achieve their vision, with a focus on intertwining aesthetic beauty with practical function.

  • Kristin Silmore

    Kristin Silmore

    Office Manager

    Kristin has worked as a consultant with numerous small business clients to provide marketing and business services. In her spare time, Kristin still pursues her passion for baking after building a successful local Mill Valley catering and wholesale baking business. She loves finding solutions, introducing new ideas and creating efficiencies for her clients and family.

  • Matt Au

    Matt Au


    Matt brings a diverse background and interest to the interdisciplinary nature of design. He has worked on projects ranging from breweries and restaurants to high-end residential. He approaches each project with a focus on shaping experiences through materiality, light, and space.

  • Ahlada Pappu

    Ahlada Pappu

    Junior Designer

    Originally from the Bay Area, Ahlada spent her formative years in India. Intrigued by the historical and vernacular architecture, she pursued her bachelors of architecture from Anna University. Upon graduating, she returned to California and worked at a residential architecture firm before joining Richardson Pribuss Architects. Ahlada is interested in sustainability and urbanism. She enjoys observing urban culture and lifestyle for inspiration to inform her design approach.

Let’s build something together.

Get in touch.

General Inquiries

(415) 380-0474

Office Location / Mailing

447 Miller Avenue, Suite D
Mill Valley, CA 94941