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Cascade Built - Capitol Core Apartment Building


Vital Stats
Location: Capitol Hill, Seattle
Star Level: 4-Star
Checklist: Multifamily apartment
Verifier: Evergreen Certified
Section Points
Site and Water 142
Energy Efficiency 105
Indoor Air Quality 98
Material Efficiency 72
Total Score 417


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This apartment building, designed by NK Architects and constructed by Cascade Built, is a great example of energy efficient urban living. The building contains 17 units on six floors: the top two units are two-story lofts and the remaining 15 units are studio apartments. All units are corner units, and the top two units have full rooftop decks!

The lot on which this project was built is 2,700 square feet. This project is comfortably able to fit its 17 units into this space thanks to the thought put into the design of the building, while also paying close attention to energy efficiency and high indoor air quality to further contribute to resident comfort in a desirable spot just blocks away from the Capitol Hill Link light rail station.

The building is 33.7% more energy efficient than required by code, thanks to ductless mini-splits in some units and an efficient gas condensing hot water tank. Large windows provide ample natural light as well as great views of the city. An energy recovery ventilator (ERV) provides great ventilation, and the toxin free interior finishes contribute to the healthy indoor environment. 

Built Green highlights include: 

Site and Water

  • Dense urban infill
  • Bike storage
  • Drought-tolerant landscaping, no turf grass
  • Efficient water fixtures and toilets


Energy Efficiency

  • 33.7% more efficient than required by code
  • ERV ventilation in common halls
  • High efficiency gas condensing hot water tanks
  • 2-inch Roxul exterior insulation
  • ENERGY STAR appliances and bath fans
  • All LED lighting, motion sensors on common area lights
  • Maximized daylighting through windows

Health and Indoor Air Quality

  • Exposed concrete interiors
  • Liquid applied flashing and rain screen siding
  • Non-toxic, allergen-free finishes
  • Track-off mats

Materials Efficiency

  • Recycled content carpet
  • Metal siding
  • High recycling rate for construction materials

Still Images


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McDowell Dining








Use pervious surfaces to reduce rainwater runoff