ADR Architectural Design and Restoration

About Us

ADR has been serving Sonoma County, the Bay Area and beyond from their home base in Petaluma since 1988. Our diverse portfolio ranges from remodels of historic Craftsman cottages to multi-million dollar hotels and restaurants, and historic renovations. We maintain excellent working relationships with local developers, builders and artisans; and for each job put together a team of professionals that work together to ensure your project flows seamlessly from beginning to end.

logos-01logos-02 We offer:

  • Site design and evaluation
  • Schematic design development
  • Planning and permit submittal
  • Contract document preparation
  • Construction administration
  • To learn more about green building, visit the LEEDUS Green Building Council and Build it Green websites.


Rick Brereton

Richard Brereton

CA Architect License C15084 CA Contractor License 948658 LEED AP Build It Green Professional Member of Petaluma Chamber of Commerce

Richard holds a Bachelor of Science Degree in Architecture. He graduated with honors from California Polytechnic State University at San Luis Obispo in 1979.  A principal partner at ADR, he has been working in the field of architecture for over 30 years. Born in Marin County, his family has lived in Northern California for five generations.  In addition to being a licensed architect for 30 years in California, he has been licensed in Texas, is currently a licensed contractor, a Build It Green Professional, and a LEED AP. Rick’s primary experience is buildings up to 4 stories, combustible and non-combustible construction; including, commercial, new and tenant improvements, industrial, hospitality, restaurants, office, retail, medical, assembly uses, and residential, with extensive experience with building codes and accessibility laws. Although trained with pen and paper - prior to the era of computer aided drafting – he has been working with AutoCAD for over 20 years.

Church Hildreth Charles “Church” Hildreth

CA Architect License C19974 CA Contractor License 570909 Member of Petaluma Chamber of Commerce

Church holds a Bachelor in Arts with a major in Architecture from the University of California at Berkeley. Born and raised in Sturgis, Michigan, Church moved to Marin County in 1971. He raised his two children in Sonoma County and has participated in many local community service and sports programs over the years. Church is also a licensed, practicing contractor dba Hildreth Renovations since 1989.