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Joint Proposal Announced for City’s Commuter Parking and Mixed-Use Project

Dec 17, 2018 – MainStreet Property Group and Shelter Holdings/Weinstein A+U Announce Joint Proposal for City’s Commuter Parking and Mixed-Use Project

MainStreet Property Group to Lead the Development Project

In early September, the City of Mercer Island issued a Request For Qualifications (RFQ) seeking innovative and capable property developers to design and build a development consisting of a City-owned commuter parking facility and a mixed-use residential/commercial structure in Town Center. The City received nine submissions and narrowed them down to five semi-finalists who each presented their qualifications and concepts via the City’s online engagement portal, and at a City-hosted Open House attended by over 100 community members.
Today, the two finalists, MainStreet Property Group LLC and Shelter Holdings / Weinstein A+U, are pleased to announce a joint proposal to move the development process forward by merging both organization’s proposals.   As a result of these discussions, MainStreet Property Group will be the developer of the project and Weinstein A+U will join the MainStreet team as the lead Architect and planner.  GGLO Design will remain on the MainStreet team as the interior designer for the project.
“We are pleased that MainStreet and Shelter have arrived at this solution.  This proposal merges both organizations’ strengths in a manner that benefits all stakeholders as well as the community. Once authorized by the City Council, the entire MainStreet organization looks forward to moving the development process forward with the City and community and deliver the best for Mercer Island,” said Kelly Price, MainStreet’s President.
Price continued, “We are thrilled to work with Weinstein A+U on this project.  Several years ago we had jointly looked for opportunities to work together and now this project is a perfect fit for both firms.  Ed Weinstein and his team are amazing architects and together with the MainStreet team, our strategic collaboration will create even more added value for the project.  I would also like to thank the entire Shelter Holdings team for their participation in the process and support of this result.  It really is a win/win approach.”
“We’re really excited about the depth of talent and experience represented by this partnership and look forward to reviewing designs that will meet a broad range of community goals and needs,” said Julie Underwood, City Manager.

In late October, the City’s selection committee had named the two firms as preliminary finalists based on each having strong, well-qualified teams with proven track records, and initial design concepts that included space for the Mercer Island Center for the Arts as well as a significant commuter parking facility (up to 150 stalls).

On November 26, 2018, both teams made presentations and received questions from the City Council. The City Manager had originally planned to provide a recommendation to Council on the preferred developer at its December 18, 2018 meeting. Instead, at its January 15, 2019 meeting, the City Council will formally acknowledge this joint proposal concept and authorize the City Manager to move forward with negotiating an Exclusive Negotiation Agreement (ENA) - this process is expected to take up to six months.
The City intends to create a single developable parcel by assembling two separate properties, consisting of the old “Tully’s Coffee” property (7810 SE 27th Street) and a portion of the City-owned land on Sunset Highway (see map). This unique project at a premier location will produce a gateway connection between the City’s Town Center and the future Sound Transit Light Rail Station (opening in 2023).

For more information on project details, visit 


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