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For many years, Mercer Island citizens have been concerned about the future of the community’s downtown. Past business district revitalization initiatives (e.g., Project Renaissance in 1990) strove to overcome the effects of “under-capitalization” in the Town Center. These efforts sought to support and revitalize downtown commercial/retail businesses and devised a number of recommendations for future Town Center redevelopment. Growing out of previous planning efforts, a renewed interest in Town Center revitalization emerged in 1992—one looking to turn the 33-year-old downtown into the vital economic and social center of the community.

In 1992 the City of Mercer Island undertook a major “citizen visioning” process that culminated in a broad new vision and direction for future Town Center development as presented in a document entitled “Town Center Plan for the City of Mercer Island”, dated November 30, 1994. The City used an outside consultant to help lead a five-day citizen design charrette involving hundreds of Island residents and design professionals. This citizen vision became the foundation for new design and development standards within the Town Center and a major part of the new Comprehensive Plan that was adopted in the fall of 1994. At the same time, the City invested about $5 million in street and streetscape improvements to create a central pedestrian street, along 78th Avenue and route the majority of vehicular trips around the core downtown onto 77th and 80th Avenues. Specific new design and development standards to implement the Town Center vision were adopted in December of 1995. The Mercer Island Design Commission, City staff and citizens used these standards to review all Town Center projects until 2002.

In 2002, the City undertook a major planning effort to review and modify Town Center design and development guidelines, based on knowledge and experience gained from the previous seven years. Several changes were made in the existing development and design standards to promote public-private partnerships, strengthen parking standards, and develop public spaces as part of private development. Another goal of the revised standards was to unify the major focal points of the Town Center including the pedestrian streetscape of 78th Avenue, an expanded Park-and-Ride and Transit Facility, the public sculpture garden, and the Mercerdale Park facility. As a result, the following changes were made to the design standards:

Expanding sidewalk widths along the pedestrian spine of 78th Avenue between Mercerdale Park on the south and the Sculpture Garden Park on the north;

Identifying opportunity sites at the north end of 78th for increased public spaces;

Requiring that new projects include additional public amenities in exchange for increased building height above the two-story minimum; and

Increasing the number of visual interest design features required at the street level to achieve pedestrian scale.

The changes to the design and development standards were formulated by a seven-member Ad Hoc Committee composed of citizen architects, engineers, planners and several elected officials. Working for three months, the Ad Hoc Committee forwarded its recommendations to the Planning Commission, Design Commission and City Council for review. The revised Town Center Development and Design Standards (Mercer Island City Code Chapter 19.11) were adopted by City Council in July 2002 and amended in June 2016. They will continue to implement the Town Center vision.

The effects of the City’s efforts to focus growth and revitalize the Town Center through targeted capital improvements, development incentives and design standards to foster high quality development are now materializing.

Between 2001 and 2007, 510 new housing units, and 115,922 square feet of commercial area were constructed in the Town Center. Between 2007 and August 2014, 360 new housing units, and 218,015 square feet of new commercial area were constructed.

In 2014, the City began a process to review the vision, Comprehensive Plan polices and development and design guidelines for the Town Center. This effort involved several stakeholder groups, 15 joint meetings of the Planning and Design Commissions and hundreds of public comments.

During 2004, the City engaged in a major effort to develop new design standards for all non-single family development in zoning districts outside the Town Center. This effort also used an Ad-Hoc process of elected officials, design commissioners, developers, and architects. The design standards for Zones Outside of Town Center were adopted in December 2004. These standards provide new direction for quality design of non-residential structures in residential zones and other multi-family, commercial, office and public zones outside the Town Center.

Updates to this document were made in 2014 to comply with the Countywide Planning Policies, including updated housing and employment targets.