CHICAGO — Skender has begun construction on the 500 N. Michigan Ave. adaptive reuse project, which will convert the 400,000-square-foot office tower into 320 apartment units on Chicago’s Magnificent Mile. The project team includes Connecticut-based Commonwealth Development Partners and GREC Architects. Completion is slated for late 2027. Originally designed by Skidmore, Owings & Merrill and completed in 1968, the building rises 24 stories and 304 feet tall. The conversion will transform vacant floors three through 23 into residential dwelling units, while a new 25th floor with amenity space will be constructed atop the building, adding 17 feet to its height. Level 24 will house mechanical systems, and floors two through five will include additional amenity programming. Ground-floor retail will be retained. Skender’s scope of work includes full interior demolition of the existing vacant office spaces, elevator modernization throughout all floors and the complete build-out of residential units and amenity spaces.
MARLBOROUGH, MASS. — Advocates, a nonprofit organization that supports people with behavioral health disorders, disabilities and brain injuries, has signed a 95,182-square-foot office lease in the western Boston suburb of Marlborough. The deal brings the 160,649-square-foot building at 251 Locke St. to full occupancy. Alison Powers and Robert Walles of JLL represented the landlord, Related Beal, in the lease negotiations. Jon Pezzoni of Avison Young represented Advocates.
NEW YORK CITY — National construction firm JT Magen has completed a 42,000-square-foot office project in Midtown Manhattan that is a build-to-suit for auction house Bonhams. Bonhams is relocating from a 32,000-square-foot space at 580 Madison Avenue to the four-story space at 111 W. 57th St., which will serve as the company’s new flagship location. Gensler served as the project architect.
WASHINGTON, D.C. — Columbia Property Trust has signed a mix of six office and restaurant leases at 1800 M Street, a recently repositioned, 565,000-square-foot office tower located in Washington, D.C.’s Central Business District. Totaling approximately 72,000 square feet, the deals include new arrivals, extensions, an expansion and two renewals. Boutique law firm Wilkinson Barker signed an eight-year extension for its 33,971-square-foot office; an unnamed communications and public affairs firm signed a 6,288-square-foot expansion and an eight-year extension, where its footprint will grow to 15,061 square feet; the Association of Women’s Health, Obstetric and Neonatal Nurses (AWHONN) signed a nine-year renewal for 9,574 square feet; and the American Academy of Family Physicians signed a new 10-year lease for 9,658 square feet to relocate its former office from the nearby 1133 Connecticut Avenue office building this fall. In addition to office tenants, Columbia has signed Sorn Thai (4,095 square feet) and Italian restaurant Sorella on the ground floor. Over the past two years, the landlord has secured more than 242,000 square feet in leases, bringing 1800 M Street to 83 percent occupied. Columbia also recently renovated the building’s conference facility, lounge, rooftop terrace, lobby and concourse level. Tenants were represented by agents …
TAMPA, FLA. — JLL has arranged a $55.7 million loan for 143,354 square feet of office and retail space within Midtown East, an 18-story office tower in Tampa. The property was delivered in April 2025 and represents the third and final office tower within Midtown Tampa District, a 22-acre mixed-use campus that also features a Whole Foods Market, REI, Shake Shack, 700 apartments and an Aloft/Element hotel. Ed Coco, Evan Pariser, Lee Weaver and Matt Casey of JLL arranged the loan through Valley Bank on behalf of the borrower, a 50/50 joint venture between Highwoods Properties and The Bromley Cos. The office floors owned by the borrower at Midtown East were fully leased at the time of financing to tenants in the professional services, technology, staffing, real estate and insurance sectors. The financing also covered the ground-floor retail space that is ideally suited for a future restaurant. Tampa Electric Company, a subsidiary of TECO Energy, owns 11 floors of the building that were not included in the refinancing.
WASHINGTON, D.C. — A partnership between Garfield Investments and Broad Creek Capital has purchased 1667 K Street NW, a nearly 200,000-square-foot office building overlooking Farragut Square in Washington, D.C. The undisclosed seller sold the property to the partnership for $26.2 million. Andrew Weir of JLL brokered the transaction. The new ownership has selected Seth Benhard of JLL to lease the office building. JLL will also provide property management services. Garfield plans to invest approximately $10 million in capital improvements at 1667 K Street NW, which will includes installing an amenity floor on the top level.
PLANO, TEXAS — San Francisco-based Shorenstein Investment Advisers has acquired The Tennyson, a 273,000-square-foot office property located northeast of Dallas in Plano. The two-building, 12-acre complex, which is located within the city’s Legacy submarket, was originally developed in 2012 as a build-to-suit for Swedish telecommunications company Ericsson. The Tennyson was also recently renovated and was fully leased at the time of sale. The seller and sales price were not disclosed.
BALTIMORE — Marcus & Millichap Capital Corp. (MMCC) has arranged a $6.8 million acquisition loan for an office property located at 1520 S. Caton Ave. in Baltimore. Jared Cassidy of MMCC’s Washington, D.C., office secured the five-year loan with a regional bank on behalf of an unnamed, private client. Brightwood College formerly occupied the 37,200-square-foot, three-story office building. The property will be home to a regional aviation services company that will use the building as training grounds for aviation mechanics.
NEW YORK CITY — Howden has signed a 31,519-square-foot office lease in Midtown Manhattan. The global insurance brokerage firm is taking space on the 53rd floor at One Five One, a 1.8 million-square-foot tower located at 151 W. 42nd St. Sheena Gohil, Bob Rosenthal and Jack Senske of Colliers represented Howden in the lease negotiations. Tom Bow, Rocco Romeo and Nora Caliban represented the landlord, The Durst Organization, on an internal basis.
NEW YORK CITY — Cushman & Wakefield has negotiated a 14,000-square-foot office lease at 685 Third Avenue in Midtown Manhattan. The tenant, law firm Gallet Dreyer & Berkey LLP, will occupy the 28th floor of the 31-story tower, which recently underwent renovations. Garrett Varricchio, Mark Weiss and Michael Montesi of Cushman & Wakefield represented the law firm in the lease negotiations. BGO, the institutional investment firm formerly known as Bentall Green Oak, owns the building.
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