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Officials celebrated the groundbreaking earlier this month of Plambeck Gardens, which will provide 116 affordable housing units on a 4.66-acre site near the Basalt Creek natural area in Tualatin.

The project was developed by owner Community Partners for Affordable Housing (CPAH) with money from Washington County’s allocation of the 2018 voter-approved Metro Affordable Housing Bond.

The development is named after the late Doug Plambeck, a founding member and longtime treasurer of CPAH’s board who understood the need for affordable housing in the area.

Designed by Carleton Hart Architecture and under construction by LMC Construction, the project team also includes Vega Civil Engineering, MZLA Landscape Architecture, ABHT Structural Engineers, electrical engineer Samata Consulting Engineers, and more.

Plambeck Gardens is located at 23500 and 23550 SW Boones Ferry Road in Tualatin. It will have three buildings: two residential buildings and a community building, along with surface parking, covered parking and outdoor play areas. The residential buildings are planned with a mix of one-, two-, three- and four-bedroom units.

The community building is one story, while the two residential buildings are four stories, Carleton Hart Principal Michelle Black said. The community building is closest to Boones Ferry Road.

鈥淎s we’re starting to approach those residential uses, we’re stepping down in scale and height to meet the neighborhood,鈥� Black said.

Of the 116 units, 47 are open to residents at 30 percent area median income (AMI) or below, of which eight have project-based vouchers, and 69 of the units are to residents at 40-60 percent AMI or below. More than half of the units are two-bedroom or larger. Six of the units are 4-bedroom units, 16 are three-bedroom units, 40 are two-bedroom units, and 54 are one-bedroom units.

Black said the three- and four-bedroom units are a rarity for an affordable housing project, simply because from a space allocation standpoint they can be hard to fit on a site.

Carleton Hart Project Architect Kayla Zander said the two residential buildings are L-shaped and create a common interior outdoor space. The project sits within the Basalt Creek Concept Plan area. The design team used basalt stone to draw inspiration for the design, specifically from the natural characteristics of basalt stone, including the natural colors and columnar stone qualities.

There are balconies or patios at every unit, as required by the city of Tualatin. With units on every side of the corridor buildings, that design concept is on every fa莽ade.

The property allows for flexibility in space usage, incorporating trauma-informed and universal design concepts. This includes the use of natural colors. The color palette is based off being in a wooded area, with use of browns and greens. Features include spaces for education and family gatherings, as well as community gardens.

鈥�(We) worked closely with our landscape architect 鈥� there’s a ton of landscaping on this project 鈥� to make sure that the plantings had a visual interest year-round,鈥� Zander said.

There will be a variety of plants that will bloom at different times of the year.

Sustainability has been a huge point of topic for the design as well, Zander said. All three buildings exceed energy code requirements. One way they are doing this is with intermediate to advanced framing techniques with extra insulation. Zander said there is extra insulation on the outside of the buildings, paired with HVAC systems to help reduce energy bills for residents.

Carleton Hart is targeting Earth Advantage Platinum certification. They are using new heat pump water heaters. The water heaters for the project and the packaged rooftop unit (RTU) on the roof to heat, cool and provide ventilation in all the buildings are all electrical.

The roof also has a solar array, which is designed to offset energy uses for the households. The current modeling shows that Plambeck Gardens should achieve an annual production of 204,494-kilowatt hour (kWh), with an overall system size of 190.2 kilowatts (kW). This should result in the community building achieving net zero design.

This is the first project of Carleton Hart’s that will be net zero, Zander said.

Amenities for the residential buildings include meeting rooms, as well as laundry and lounge space on each floor.

鈥淭he community building is about 6,100 square feet of just all amenity space for the residents,鈥� Zander said.

It includes a community kitchen, a commons area with open seating, two classrooms, a community garden storage room, a pet-wash room and three offices and a clinic for resident services.

CPAH will include services provided in partnership with Community Action, the Native American Rehabilitation Association, Centro Cultural, Lifeworks NW, the Cascade AIDS Project, Worksystems Inc., and the Neighborhood Health Center.

The site also has two play structure areas targeting different age groups (one for ages 2-5, the other for ages 5-12), a play field, sport court, picnic shelter and a variety of additional outdoor seating areas/patios, community garden, botanical garden and an outdoor pet relief area.

The total project cost is roughly $40 million.

Construction began in early May and is expected to be complete in the fall of 2024.