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The 2024 Design Awards Event

A large group of people in formal attire are seated at round tables, dining and talking, in an ornate banquet hall with chandeliers, arched doorways, and elaborate ceiling decorations.

We’re celebrating 15 award winning projects, as well as the Trustee’s Awards for Excellence and the President’s Awards at the historic Millennium Biltmore Hotel, Downtown Los Angeles, followed by a special social event with food and drinks in the stunning ballroom of the Biltmore Hotel. Tickets to the Awards Ceremony and the post-awards reception are $225 for members and $250 and available here (discounted to $175 if you’re attending our Annual Conference – combo packages available on our conference page)

Marin County Civic Center Roof Replacement

Project Lead or Principal
Alan Dreyfuss – Wiss, Janney, Elstner Associates, Inc.

Client / Owner
Cam Isaza – Marin County Department of Public Works

Architect/Landscape
Erin Humphrey – Wiss, Janney, Elstner Associates, Inc.

Historic Architect
Leslie Scheppelmann – Wiss, Janney, Elstner Associates, Inc.

Contractor
David Arntz – Arntz Builders Inc.

Specialty Sub-Contractor
Robert Browne – Rainbow Waterproofing and Restoration

Additional Participant
David Axt – Sika Corporation

Additional Participant
James Strong – Wiss, Janney, Elstner Associates, Inc.

Marin County Civic Center Roof Replacement

Marin County Civic Center Roof Replacement is one of fifteen winners honored with the 2024 Preservation Design Award. This project was a recipient in the Craftsmanship/Preservation Technology category. Award recipients are selected by a jury of top professionals in the fields of architecture, engineering, planning, and history, as well as renowned architecture critics and journalists. Tickets and sponsorship options are available at californiapreservation.org/programs/awards/.

Aerial view of a large, blue-roofed building surrounded by trees, parking lots, and distant hills. The building is long and oval-shaped, with several arched openings and white structures on its roof.

Aerial view of a large blue-roofed building with two long wings extending from a central circular section, surrounded by parking lots, trees, and roads. Cars are parked in multiple lots around the structure.

Aerial view of a large building with a unique blue roof shaped like an H, surrounded by trees, parking lots, and a suburban landscape with hills in the background.

A tall building with a row of arches and circular cutouts is seen from below, with sunlight shining through the top. Trees and greenery surround the structure, and a clear blue sky is in the background.

Three construction workers in orange vests work on scaffolding next to a blue, ornate roof, surrounded by trees and hills under a clear sky. A tall white safety barrier lines the edge of the scaffolding.

Aerial view of workers installing a large maroon “S” on a white roof, surrounded by blue panels, with hills, trees, and buildings in the background under a partly cloudy sky.

A close-up view of a building facade with round golden lights and semicircular cutouts, set against a clear blue sky.

A table covered with a blue padded blanket holds yellow metal parts, including a long curved panel, two spheres, and four brackets. Behind the table, a chain-link fence, bins, and people in safety vests are visible.

Three long, curved, gold-painted metal pieces and two gold-painted spheres are laid out on a covered table outdoors. Two people stand nearby, partially visible. The scene appears to be on a sidewalk near garages.

Several construction workers in safety vests and helmets work on a large, red and white rooftop sign next to a hill. A lake, trees, and buildings are visible in the background.

A construction worker in an orange shirt and white helmet uses equipment on a sloped, partially painted rooftop covered with tools, cables, and protective sheets.

Workers in safety gear are applying white coating to a large, curved industrial roof, with sections covered by tarps and blue painted areas in the foreground, surrounded by trees and hills in the background.

Workers apply sealant to long concrete grooves on a sloped rooftop under cloudy skies. Blue insulation and a tall, gold pagoda structure are visible in the background. Hills and trees surround the construction site.

A construction worker in a safety vest lifts a section of blue roofing material, revealing the structure underneath. Tools including a cutter and wrench are placed on the yellow edge beside the worker.

Broken concrete pieces scattered next to the edge of a large, curved concrete structure on a sunlit, flat surface. Shadows highlight the texture and damage.

A person in jeans and boots stands on a concrete surface near a narrow raised divider. Rolled white material and a yellow extension cord are visible on the ground.

Concrete structure with three large, oval-shaped window openings under construction, exposed rebar along the edges, wooden planks on the floor, and white protective plastic sheeting in the background.

Two people examine a boat deck with peeling paint, exposed bolts, a tube of glue, and tools scattered around. Red and blue paint marks and repair work are visible on the white surface.

Several blue paint samples on white boards are arranged on a light blue textured surface outdoors under clear blue sky. The boards show different shades of blue with labels and sample codes.

A person’s hand peels away damaged, cracked blue paint from a large metal surface, revealing rust and corrosion underneath. The surface appears to be part of industrial equipment or a large structure.

A cracked and weathered concrete surface with visible repairs and patches, including a greenish area and a gray square patch. A small red and blue marker stick is placed along the edge of the repair.

A close-up of a blue rooftop shows a long crack running along a raised seam or joint. Part of a persons shoe is visible in the lower right corner. Trees and grass are in the blurred background.

A view along a wide, pale blue metal roof with raised seams, surrounded by trees. A tall golden spire rises in the background under an overcast sky.

About Marin County Civic Center Roof Replacement

The roofs of the Marin County Civic Center are one of the most important character-defining features of the building, including their forms, distinctive color, and decorative ornamentation. Roof leaks have been present since the building was constructed and have continued in various locations throughout its life. A variety of repair techniques, products, and reroofing projects had previously been utilized to attempt to mitigate the leakage problems.

The firm began with a peer review of a previous roofing rehabilitation feasibility study. The firm then oversaw the preparation of mock-up installations for three recommended roofing systems, performed adhesion testing, and assisted with analysis and testing of the colorfastness of each material based on accelerated weathering tests.

The project involved complete removal of existing roofing systems; removing, refinishing, and reinstalling the historic metal fascia; and installing a fluid-applied elastomeric roofing system which was custom-colored the building’s distinctive “Marin Blue.”

About CPF and the Awards

Held in conjunction with CPF’s 2026 Annual Conference in Riverside, the 2026 Mission Inn Preservation Design Awards Ceremony and Reception will spotlight excellence in historic preservation in a setting that reflects the very spirit of the work being honored. This special evening brings together award recipients, conference participants, preservation leaders, and supporters from across California to celebrate outstanding preservation projects and leadership through the Preservation Design Awards and President’s Awards.

Founded in 1978, the California Preservation Foundation (CPF) is California’s statewide nonprofit organization dedicated to the protection of historic places and cultural heritage. Through education, advocacy, and community-centered programs, CPF supports the people, projects, and policies that keep California’s historic resources vital and valued. We now support a national network of more than 36,000 members and supporters. Click here to learn how you can become a member.