New Boston Fund Inc. has secured two lease extensions totaling 23,000 square feet at the Granite Woods Corporate Center in Braintree.

Law firm Smith & Brink leased 15,861 square feet and VHA Inc. leased 7,500 square feet.

"We are thrilled that two of our existing tenants have elected to extend their leases at Granite Woods," Paul Stuart, vice president at New Boston Fund, said in a statement. "This continues to be a strong asset in our portfolio with such high-quality space and many attractive amenities nearby. We’re very pleased with the property’s performance given the very competitive market in Greater Boston."

Other tenants at Granite Woods Corporate Center include Verizon, Travelers Insurance and the Telephone Worker’s Credit Union.

David Goodhue and Caleb Hudak of Colliers International represented New Boston Fund in both transactions. Stephen Woelfel, who joined Colliers from Cushman & Wakefield in April, represented Smith & Brink along with Cushman & Wakefield’s J.R. McDonald.

Acquired by New Boston Fund in June 2008, Granite Woods Corporate Center consists of two office buildings totaling 168,000 square feet on a 7.5-acre site. The buildings were originally developed in 1972 and 1991, and in 2007, $3.2 million was spent in upgrades, including a renovation of the lobbies.