In Minneapolis’ North Loop along historic Washington Avenue, BKV Group revitalized the former Duffey Paper Company’s site. Inside, we transformed the manufacturing building into a contemporary, high-amenity multifamily development featuring 188 residential units and 33,000 square feet of resident amenities, including a 4,000-square-foot crane room – which features a large intact overhead industrial crane – designated for co-working, a coffee shop and residential concierge and 22,700 square feet of retail space.

Client: Cedar Street Companies

Transformation Personified

In working with the State Historic Preservation Office and National Park Service, Duffey Lofts sought state and federal historic tax credits that helped fund the conversion of three conjoined warehouses while retaining some of its historic character. The mixed-use development not only includes apartments, resident amenities, and commercial space, but also a large lobby with a public coffee shop.

A Staple of Historic Washington Avenue

Spanning a full city block, the refurbished buildings include the six-story Minneapolis Iron Store – Main Building and three-level Minneapolis Iron Store – Warehouse Building, which were constructed in 1916, as well as the two-story Lindsay Brothers Warehouse, built in 1910. All three are in the Twentieth Century Warehouse Area within the Minneapolis Warehouse Historic District, are listed on the National Register of Historic Places, and, prior to the redevelopment, sat vacant for nearly 15 years.

A Unique Living Experience

Duffey’s best-in-class amenity offerings include the addition of a rooftop deck with outdoor lawn and lounge space, fitness center, clubroom, and a double-height, sunlight-filled co-working space and coffee shop on the main level.


Duffey Lofts is the very first DELTABEAM® project in Minnesota, with BKV’s engineering experts deploying an innovative slim-floor system in the multi-story project. An efficient solution to remedy issues related to fire ratings, clearances, and spans, DELTABEAM® was used to creatively install plumbing, while  helping create an extra level of residential space.