NEW YORK CITY—Texas Pacific Group, a $67 billion private-equity firm, is growing its New York City headquarters. The firm has renewed its lease at 888 Seventh Ave. and now will occupy 100,000 square feet at the 47-story office building, according to Crain's New York Business.

TPG owns DTZ, which recently reached a deal to purchase Cushman & Wakefield for $2 billion. The Texas-based company, one of the largest private-equity firms worldwide, is expanding from about 80,000 square feet at the 880,00-square-foot building. It first signed a 20,000-square-foot lease at 888 Seventh Ave. a decade ago and has been steadily expanding ever since.

The company will occupy space near the top of the tower, on floors 33 to 38. Asking rent was about $115 per square foot. The new lease is for 10 years.

TPG has made a string of acquisitions in the commercial brokerage business in the past year. In 2014, the company bought real estate services firm DTZ. Early this year it closed on the purchase of brokerage Cassidy Turley and then reached a deal to buy Cushman & Wakefield via DTZ. The collection of companies, which TPG plans to combine, will create the third biggest real estate services firm in the world behind CBRE and Jones Lang LaSalle.

Neil Goldmacher, a broker at Newmark Grubb Knight Frank, represented TPG in the deal. Vornado Realty Trust, which owns 888 Seventh Ave., was represented in-house by Jared Solomon, an executive at the firm.