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I.  INTRODUCTION

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Mercer Island prides itself on being a residential community. As such, most of the Island’s approximately 6.2 square miles of land area is developed with single family homes. The Island is served by a small Town Center and two other commercial zones which focus on the needs of the local population. Mixed-use and multifamily developments are located within the Town Center. Multifamily development also rings the Town Center and the western fringe of the smaller Commercial Office Zone.

Parks, open spaces, educational and recreational opportunities are highly valued and consume a large amount of land. The Island has 472 acres of park and open space lands including small neighborhood parks and trails as well as several larger recreational areas, including Luther Burbank Park and Aubrey Davis Park above the Interstate 90 tunnel. One hundred and fifteen acres of natural-forested land are set aside in Pioneer Park and an additional 150 acres of public open spaces are scattered across the community. There are four elementary schools, one middle school and a high school owned and operated by the Mercer Island School District. In addition, there are several private schools at the elementary and secondary education levels.

Arts are integral to Mercer Island’s identity, vitality, heritage, and shared values. The City of Mercer Island is committed to supporting and sustaining rich and diverse cultural and arts experiences and opportunities for the community. In 2018, the City incorporated the Arts and Culture plan as an appendix to the Comprehensive Plan incorporating the goals and policies in the Arts and Culture Plan into the City’s Comprehensive Plan.

The community strongly values environmental protection. As a result, local development regulations have sought to safeguard land, water and the natural environment, balanced with private property rights. To reflect community priorities, development regulations also attempt to balance views and tree conservation.

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.

In 2006, a grassroots effort of Island citizens led the City to modify the vision statement in its comprehensive plan to include language embracing general sustainability, and in May 2007 the Council committed to a sustainability work program as well as a specific climate goal of reducing greenhouse gas emissions by 80% from 2007 levels by 2050, which was consistent with King County and Washington State targets. Later in 2007, the Council set an interim emissions reduction goal (often called a “milepost”) for City operations of 5% by 2012.

From 2010 to 2014, with the entire community’s sustainability in mind, the City has implemented a wide range of outreach programs, efficiency campaigns, alternative energy initiatives, land-use guidelines, and other natural resource management measures designed to minimize the overall impacts generated by Island residents, for the benefit of future generations. Due to the 20-year horizon envisioned by this comprehensive plan, it is especially appropriate to include measures that address the long-term actions needed to reduce greenhouse gas emissions, ideally in collaboration with other local governments. Actions that the City will take in the management of its own facilities and operations are addressed in the Capital Facilities Element of this plan. In 2018, the City continued to promote and support sustainable development, through the development of green building goals and policies for all residential development.

Beginning in 2018, the City assessed the City’s strengths and weaknesses in supporting sustainability using the STAR Communities framework. Information from this assessment, along with the measures discussed above, and others under consideration, will be identified in more detail in a rolling 6-year Sustainability Plan, to be adopted in 2019, which will guide the City’s internal and external actions while taking into account the interrelated issues of climate change, population change, land use, public infrastructure, transportation choices, natural resources management, equitable services and accessibility, arts and community, public health and safety, human services, and economic development.

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