The S. Birkenstein & Sons Building at 401 W. Ontario
401 W. Ontario Street · River North, ChicagoRiver North, Chicago

Historic timber lofts in the heart of River North

Fifty-seven residences inside the 1905 S. Birkenstein & Sons Building — original brick and heavy timber, a block from the Brown Line, steps from the river.Fifty-seven residences inside the 1905 S. Birkenstein & Sons Building.

1905
Built for S. Birkenstein & Sons
57
Loft residences
4
Stories of brick & heavy timberStories of brick & timber
0.2 mi
To the Chicago River

Floor plans

Studios to two-bedrooms, no two exactly alike. Original posts and beams in every plan.

Interest list open

Studio

550–700 sq ft · oversized windows · in-unit laundry

Inquire →
Interest list open

One bedroom

750–1,000 sq ft · exposed brick · walk-in closet

Inquire →
Interest list open

Two bedroom

1,100–1,400 sq ft · corner exposures · original timber posts

Inquire →
Loft kitchen with warm cabinetry, charcoal stone and exposed brick
Coming soon

Finishes

Charcoal stone, warm cabinetry, satin nickel — we’re dialing in the finish selections now and will share them here once they’re final.

Since 1905

The House of Birkenstein

Built for a family scrap-trade firm at the height of Smokey Hollow’s industrial boom, 401 W. Ontario spent a century as warehouse and workshop before becoming the lofts you see today. The posts, beams and brick are all original.

Read the building’s story →
The S. Birkenstein & Sons Building

Amenities

01Exposed brick & heavy timber
02Oversized windows
03In-unit laundry
04Fitness center
05Community lounge
06Pet friendly

River North

Galleries, the Riverwalk, the Merchandise Mart and half the city’s best restaurants — all within a ten-minute walk. The Brown Line at Chicago Ave. puts the Loop six minutes away.

Explore all 270 places →

Eat & drink

River North's restaurant row is out the front door.

Transit

Brown & Purple Lines at Chicago Ave., six minutes to the Loop.

Outside

The Riverwalk, Ward Park and the lakefront trail, minutes away.

Construction schedule

The building’s conversion to residences is underway. Here’s where things stand.

Complete
2025

Design & Planning

Architectural plans developed in careful keeping with the building's 1905 heritage.

Complete
Early 2026

Permits & Approvals

Historic preservation review passed and building permits secured.

Next
Oct 2026

Construction Begins

Adaptive-reuse construction commences on the historic building.

Planned
Oct 2027

First Deliveries

Residents move into their new loft homes in the heart of River North.

Contact us

Interested in Birken Lofts? Tell us a bit about what you’re looking for and we’ll be in touch within a business day.

401 W. Ontario Street
Chicago, IL 60654