ECHO, a 10-unit apartment building in the Eastlake neighborhood of Seattle, is now a Design Certified PHIUS (Passive House Institute US) Core 2021 project.

This apartment building will replaces a single-family structure in this residential urban village, adding missing-middle housing. It utilizes the stacked flats concept which pushes the bounds of the single-family envelope but maintains an urbanism-friendly street frontage.

The two homes on the ground floor are both fully accessible. And, the top two units have high ceilings with lofted sleeping areas.

High-performance design elements include: thermal control, airtightness and moisture control, balanced ventilation, and high-performance glazing.

TEAM
Developer: West Crescent Advisors, LLC, Nancy Melton
Architect: CAST
Passive House Institute US: @passivehouseinstituteus
Builder: Carrig Construction @carrig_construction
Project Consultant: Woodworth Construction Management LLC, Lydia Anne, @woodworth_built
Civil Engineer: Davido Consulting Group, Inc. @dcgengr
Structural Engineer: Harriott Valentine Engineers @harriottvalentine
Mechanical Engineer: Ecotope @ecotope_inc
Envelope Consultant: B.E.E Consulting, LLC
Electrical Engineer: TFWB Engineers, Inc
Windows: Alpen Windows – Passive House Certified
Landscape Architect: @karenkiestlandscapearchitects
Arborist: Moss Studio
Geotechnical Engineer: PanGEO, Inc.
Surveyor: Terrane @terranesurveying
Third party verifier: Balderston Associates

A small building can have a big impact: this design has a commercial suite, a live work unit, two subsidized one bedroom apartments and two 2 bedroom apartments (with bonus lofts).

seattle architect has more missing middle housing on the boards

The housing crisis in California is so difficult in part because jurisdictions have opposed or slowly walked new housing through a mix of bad zoning and bureaucratic barriers. In response, the state has invoked a provision called the ‘builder’s remedy’ where towns and cities that have failed to show how they can meet their housing targets lose their ability to enforce their own zoning rules, provided that projects include some percentage of affordable housing.

The design is pushed to the street, preserving more backyard for residents and mature trees. The commercial space can be thought of as a cafe, retail or daycare.

As part of this zoning holiday we’ve designed this speculative small infill project. It has a commercial suite, a live work unit, two affordable one bedroom apartments and two 2 bedroom apartments with lofts.

Diagram of five unit apartment building.

This project is geared for using the Passive House green building standard to achieve very low operating expenses, and high indoor air quality. It is packed with amenities such as large porches and bike storage. If you are a developer interested in infill development or a property owner looking to make the most of this window of opportunity, please contact us at Matt@CASTarchitecture.com.

Seattle Architect pursues passive house certification with missing-middle housing on Lake Union

Echo on Eastlake apartments is pursuing Passive House certification, with early design and feasibility studies complete on the new 10-unit apartment building in Seattle’s Lake Union neighborhood.

This building will replace an existing single-family structure in this residential urban village, adding missing-middle housing. It utilizes the stacked flats concept which pushes the bounds of the single-family envelope but maintains an urbanism-friendly street frontage. There is one central stair and no shared walls. And, the two homes on the ground floor are both fully accessible.

Six-to-twelve-plexes offer a superior urban experience, more housing units, more housing variety, and at least some fully accessible housing units. They also may preserve more tree canopy, increase open space, and optimize daylight compared to townhomes.

More to come in the months ahead.

TEAM
Developer: West Crescent Advisors, LLC
Owner’s Representative: Woodworth Construction Management LLC @woodworth_built
Architect: CAST architecture
Builder: Carrig Construction
Civil Engineer: Davido Consulting Group
Landscape Architect: Karen Keist Landscape Architects
Arborist:  Moss Studio
Geotechnical Engineer: Pangeo, Inc.
Surveyor: Terrane
Structural Engineer: Harriott Valentine Engineers
Envelope Consultant: B.E.E Consulting