Seismic Retrofit Project

Historic Seattle is undertaking a voluntary seismic retrofit project of the Good Shepherd Center in Wallingford. Get up-to-date information on the project on this page.

Good Shepherd Center Voluntary Seismic Retrofit Project

Project Mission

The Main Building and South Annex of the Good Shepherd Center (GSC) were both constructed in an era when unreinforced masonry buildings (URM), in which brick structures carry gravity loads but no steel is present to strengthen structural connections during seismic events, were common practice. Today, the City of Seattle strongly encourages, and will soon require, seismic retrofitting of these URM buildings. To protect our tenants and this historically significant site, Historic Seattle has elected to begin the seismic retrofit process now. We appreciate your cooperation and support in our efforts to make the Good Shepherd Center a safe and welcoming place for all.

Existing Conditions

The Main Building is divided into thirds with a south, central, and north wing. Each wing is divided by a firewall extending the entire height and width of the building. The Main Building is constructed of unreinforced masonry and is subject to our voluntary seismic retrofit project. The South Annex, assumed to be constructed shortly after the main building, is a single-story structure consisting primarily of concrete masonry units (CMU) walls with some unreinforced masonry exterior walls. Like the Main Building, the South Annex is subject to our voluntary seismic retrofit project. The North Annex, designed in 1953, consists of a two-story building with solid, reinforced brick masonry unit walls on the east and west facades of the building and tilt-up concrete panels providing shear resistance to the north and south facades. The North Annex does not require any seismic retrofit.

Project Team

The following firms and individuals are key members of our project team:

Architect: BuildingWork – Matt Aalfs, Elise Novak, and Kate Weiland
Structural Engineer: Swenson Say Faget – Dan Say and Zane Kanyer
Contractor: CDK Construction Services, Inc. – Howard Treat and Roberto Santana
Testing: Otto Rosenau – Judi Rosenau-Payseno and Christopher Pratt
Hazardous Materials Testing: Migizi Group – Doug Henry
Cost Estimation: RC Cost Group – Andy Cluness and Mark Richardson

Construction Schedule (preliminary, subject-to-change)

We expect construction to first take place in the South Annex from June 17, 2024 through July 11, 2024. The overall construction window is 180 calendar days from the June 17 start date.

Download the preliminary schedule:
GSC Seismic Schedule 6-11-24 (PDF) – posted June 13, 2024


Historic Seattle would like to thank and recognize our generous funders for this important project:

Raynier Institute and Foundation
Washington State Historical Society’s Heritage Capital Projects program
City of Seattle Department of Neighborhoods
Murdock Trust
Norcliffe Foundation
Joshua Green Foundation

Additional Information

GSC All Tenants – Scope of Work Presentation (PDF)
GSC All Tenants – FAQs (PDF)
Regulated Materials Survey (PDF)


Image: BuildingWork