NEW YORK CITY—Denihan Hospitality Group has signed a management agreement with Ark Partners for two hotels, The Mansfield and The Franklin, located in New York City’s Midtown and on the Upper East Side, respectively. With the addition of these two assets to its portfolio, Denihan will own and/or manage a collection of 11 boutique hotels in New York City.

According to David Duncan, president of Denihan, the addition of these properties is part of the company’s overall strategy to double the size of its portfolio within the next five years. With these two new management contracts, Denihan now owns and/or manages a total of 15 properties. The company’s current Manhattan portfolio includes five hotels managed under the Affinia brand: the James New York, which opened in SoHo in 2010; luxury independents The Surrey and The Benjamin; as well as the Eastgate Tower, which is operated as an affiliate.

Located at 12 W. 44th Street along the famed Club Row, the Mansfield is housed in a historic Beaux-Arts building originally constructed in 1903. Located just off Fifth Avenue and close to Bryant Park, Rockefeller Center and Radio City Music Hall, the hotel features the M Bar, a popular Midtown gathering spot in the theatre district. The 126 guest rooms and suites feature details such as Aveda bath products, iPod docks and plush pillow-top mattresses.

The Franklin is a 50-room hotel nestled in the heart of the Upper East Side at 164 E. 87th Street, between Lexington and Third Avenues. It is in close proximity to Museum Mile and near the boutiques and cafes of Madison and Lexington Avenues. Guest rooms featuring 100 percent Egyptian cotton linens, pillow-top mattresses, Bvlgari bath products and Frette cotton terry bathrobes.