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Take a first look inside energy-efficient Capitol Core in Capitol Hill

The six-story building contains 17 homes

Derek Reeves Photography

There’s one Capitol Hill residential project down: An apartment building underway near Boylston Avenue East and East Olive Way dubbed Capitol Core was just completed. The building contains two dramatically different types of units: two penthouse lofts with view decks above and 15 studio apartments below.

The project was designed by NK Architects and constructed by Cascade Built, two outfits that specialize in energy efficiency; the latter recently won an award for a passive house-inspired townhouse development in the neighborhood.

This building also draws from passive design, although it still makes use of mechanical systems. In this case, that means extra steps taken for energy efficiency: extra insulation, large windows for light, and efficient mechanical systems where they’re needed. The environmentally friendly build earned the project four-star Built Green certification.

The typical unit, while a studio, separates the sleeping and common areas with a loft reachable via spiral staircase. The lower area is small, with the kitchen lining one wall. The basic units soak in light through two floors of windows.

Many of the west-facing units have water and Space Needle views.

In these standard units, a faux balcony provides no actual useable outdoor space—maybe just some breathable outdoor air. The only outdoor space for those tenants is shared.

But in the penthouses upstairs, full rooftop decks provide much more private space.

The modern building was built on an urban infill lot.

The units, which are all corner units, will range from $1,300 to $2,200 per month, with an average rent of $1,470, a spokesperson tells us.

This article has been updated with rental information.