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Project of the Week for April 11, 2016: Hassalo on Eighth

on April 11, 2016 at 12:40 pm under

Project of the Week Hassalo on Eighth Project of the Week: 4/11/16

Hassalo on Eighth
Portland, OR, USA
38,000 sf. Greenroofs

Project of the Week Description & Details

On track to become a LEED ND Platinum community, Hassalo on Eighth transformed an underdeveloped area – previously a vast parking lot – into a vibrant, eco-friendly, 24-hour residential development just minutes from downtown Portland. Designed by GBD Architects and encompassing four blocks with 657 sustainable luxury units in east Portland Oregon’s Lloyd Eco-District, the three buildings offer over 50,000 square feet of retail space, 1,200 below-grade parking stalls, and a Bike Hub with over 1,000 bike stalls. The integration of multiple green roofs covering over 38,000 square feet and the largest onsite urban wastewater treatment facility in North America were key components. A significant refund on system development charges was provided by the city as a result of the innovative water management design elements.

The state-of-the-art urban redevelopment encompasses three new multifamily housing buildings of varying density. Extensive greenroofs by Columbia Green Technologies cover 25,650 square feet planted with sedum tiles using their Extensive Layered System. Roof terraces on the Velomor and Aster Tower provide amenity space, with barbecues for entertaining on the Astor Tower greenroof. The project’s greenroofs reduce peak flows during large rain events by retaining stormwater, preventing stormwater flows from overwhelming the system. The entire development, along with an existing office tower, is connected to the decentralized treatment and reuse system N.O.R.M., short for Natural Organic Recycling Machine. Designed by Biohabitats in collaboration with GBD Architects, Glumac, and PLACE Studio, N.O.R.M. is a prominent feature in the main plaza. It treats and recycles 100% of the grey and black water onsite through a series of trickling filters and constructed wetlands, diverting approximately 47,000 gallons of wastewater from the municipal sewer system daily. Due to these cutting edge stormwater management strategies, the owner/developer American Assets Trust received a refund of the water and sewer fees totaling $1.48 million, almost half of the City’s three million dollar charge.

Project of the Week Hassalo on Eighth

Year: 2015
Owner: American Assets Trust (AAT)
Location: Portland, OR, USA
Building Type: Multi-Use
Type: Extensive & Intensive
System: Custom
Size: 38,000 sq.ft.
Slope: 1%
Access: Accessible, Private

Project of the Week Hassalo on Eighth

Project of the Week Hassalo on Eighth

Designers/Manufacturers of Record:

Owner/Developer: American Assets Trust
General Contractor: Turner Construction
Architect: GBD Architects
Greenroof Installation: Teufel Landscape
Extensive Modular System: Extensive Layered System with Sedum Tiles, Columbia Green Technologies
Roofer: McDonald & Wetle
Roofing System: Hot Applied Rubberized Asphalt (over concrete), Henry
Roofing System: SBS Modified Bitumen (over wood), Malarkey Roofing Products
Landscape Architect: Place Studio
Civil Engineer: Harper Houf Peterson Righellis Inc.
Structural Engineer: KPFF Consulting Engineers
Mechanical / Electrical / Plumbing: Glumac
N.O.R.M. Team: Biohabitat, Turner Construction, D&R Masonry, JH Kelly, Berg Electric, Coffman Excavation, and Teufel Landscape

Project of the Week Hassalo on Eighth

View the PROJECT PROFILE to see ALL of the Photos and Additional Information about this particular project in The International Greenroof & Greenwall Projects Database.

Project of the Week Hassalo on Eighth

Project of the Week Video Feature

Watch the Hassalo on Eighth Project of the Week Video below or see it on our GreenroofsTV channel on YouTube:

[iframe id=”” align=”center” mode=”normal” autoplay=”no” aspect_ratio=”4:3″ maxwidth=”560″]

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Love the Earth, Plant a Roof (or Wall)!

~ Linda S. Velazquez, ASLA, LEEP AP, GRP Publisher



3 replies to "Project of the Week for April 11, 2016: Hassalo on Eighth"

  • Hi Linda,

    Thank you for writing such a wonderful piece about our community! I would like to clarify that our usable rooftop terraces are at Velomor and Aster Tower – and that Velomor’s barbecue is on the ground floor while the tower’s is on the roof top terrace.

    We look forward to sharing your piece on social media and appreciate the love! Thank you!

    • Hi Jessica,

      It was a pleasure compiling the information from Columbia Green Technologies, GBD Architects, the Hassalo on Eighth’s website and various sources on the web – it’s such a great project and from your Facebook photos, it seems like a wonderful community of residents. Thank you for pointing out the error, and I updated both the Project Profile ( and this Blog post. The Greenroof & Greenwall Project Database is a living research document, and we need everyone’s help to keep it updated and as correct as possible!

  • Thank you! We truly do appreciate you taking the time to write this piece – I’ve seen it get some great traction over the last few days. Fantastic!

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