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Customer Service Facilities and Paving Project

November 25, 2019 Update:

As you’ve undoubtedly noticed by now, things are happening at Shilshole Bay Marina. Construction on three new Customer Service Buildings is underway!

The South and Central buildings (near the current M2 & M4 respectively) are each 2,700 square feet with restrooms, showers and laundry rooms including family units and are all ADA accessible.  The laundry is nearly double of what’s currently on site. Solar panels will generate 70% of the heat needed for each building and radiant heat pumps which will keep the spaces dry and warm.  The North restroom (near the current M6 restroom) will be an 800 square foot structure with gender neutral restrooms and separate shower rooms.

The new facilities will be open by May 2020, and wall framing should start in the next few weeks. Once the new facilities are open, the older M4 and M6 buildings will be removed.  The final stage will be paving the entire parking area. The entire project will be completed by Western Ventures Construction Company.

You may view and download the current Improvements Coming to Shilshole Bay Marina.

If you have questions, please send project staff a note at

SBM restroom rendering

February 14, 2019 Update:

On February 13, project staff provided an update on the Customer Service Facility Projects at the Shilshole Dock Captain Meeting. Staff shared that the bids opened in July 2018 were 33 present higher than the Engineer's Estimate. To understand costs, staff met with bidders and found that the bids reflect the region's current construction market. Next, staff spent several months looking at alternatives that would deliver maximum customer-service improvement, but better align the project scope and budget. The alternatives were also weighed against feedback from moorage and business tenants collected during the individual and public engagement meetings hep throughout design.

As a result of this extensive review, staff will present at the February 26 Port Commission meeting and recommend an option that reduces the project scope and increases the construction authorization by $2.9 million. This approach will result in a total project estimate of $15.0 million which includes a 15% construction contingency and makes use of the current design and permits.

The recommended alternative preserved the elements which most directly benefit tenants and customers including: the two large, multi-use buildings in the south and central areas of the marina (restroom, shower, and laundry at 2,700 square feet each), plus the smaller restroom/shower-only building at the north end of the facility (700 square feet). The South and Central buildings include separate ADA accessible men's and women's restrooms with toilet, sink, and shower areas, along with the two family all-gender restrooms with shower facilities that will also be ADA accessible. These larger buildings incorporate tenant laundry areas larger than the existing facilities with room for further expansion as needed. The new facilities significantly increases the number of showers and more than doubles the laundry capacity. These were top priorities in outreach feedback. The parking lot paving project remains unchanged.

The recommendation does include $1.1M in reductions including: exterior decorative lighting, geothermal heat, conversion of M2, M5 for storage and bike storage attached to the new buildings. Staff also commented that an air source heat system will be used rather than the original ground source since it offers an equally efficient and sustainable option, but at a lower cost. Other highlights include a commitment to preserve or relocate the existing North pea patch and that staff will continue to review other options for bike storage.

The updated schedule has construction starting in August, 2019 and completed in May, 2020. All current restroom/showers/laundry facilities will remain open during construction.

If you have questions, please send project staff a note at

September 11, 2018 Update:

On September 11, 2018 Tracy McKendry, Senior Manager of Recreational Boating and Mark Longridge, Capital Project Manager, gave a project update at the Dock Captain Meeting. They shared that the construction bids, opened late summer, came in significantly higher than expected, likely fueled by Seattle's vigorous building climate. The project team is working to assess several options to deliver the new restroom/laundry facilities.

November 14, 2017 Update:


Port Commission Approves Construction Funding For Restroom, Laundry, and Paving Project

At the November 14 Port Commission meeting, the project team received construction funding to replace the old, worn restrooms with larger, more efficient and multi-use customer service facilities that incorporate sustainable design elements. Parking lot paving is also included in the $12 million upgrade.

The project consists of the construction of three new buildings. Two large, multi-use buildings (restroom, shower and laundry) will be located in the south and central areas of the marina, plus a smaller restroom/shower only building at the north end of the facility. As part of the project, two of the older restroom structures would be repurposed for storage (M2 and M5) and two will be demolished (M4 and M6). In addition, a significant portion of the parking lot will be paved.

The South and Central buildings would have a footprint of approximately 2,800 square feet each and include separate ADA accessible men’s and women’s restrooms with toilet, sink and shower areas, along with two family unisex restrooms with shower facilities and will also be ADA accessible. These larger buildings also incorporate tenant laundry areas larger than the existing facilities, with room for further expansion as needed. The North building would be approximately 800 square feet and include six individual unisex restroom and shower facilities (three each). Although consolidated into fewer buildings, the new facilities will significantly increase the number of showers over the existing configuration, and more than double the current laundry capacity, both top priorities in outreach feedback.


The design incorporates sustainable features including radiant heated floors, water saving fixtures, onsite stormwater management bioswales and rooftop photovoltaic panel arrays on the two larger buildings.These solar arrays will offset an estimated 70% of the restrooms’ electrical use.

The South and Central buildings will also include geothermal heat pumps as the primary heating and cooling system for the building, the first such system the Port has built. These systems will use approximately seven, 300-foot deep wells per building, to exchange heat pulled from the ground to heat and cool the building spaces much like an air conditioner does with outside air. The geothermal heat pumps are expected to handle over 70% of the buildings heating and cooling needs without requiring outside fossil fuels.

Thank you to everyone who contributed input to shape the project. The final design incorporates the feedback received from moorage and business tenants during the individual and public outreach meetings to provide the best user experience possible. June 14, 2017 Update The Port of Seattle hosted a Shilshole Bay Marina Community Meeting on June 13 to update moorage customers, tenants and neighbors about the Restroom & Laundry Building project which is at the 60% design mark. The project team presented interior and exterior artist renderings and specifics about the structures and project schedule.

SBM Restroom map

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