HOUSTON-Houston Center, a collection of four office towers in downtown, has inked two renewal leases totaling 49,216 square feet.

Towers Watson Pennsylvania Inc. signed a five-year renewal and expansion for 23,520 square feet at 1 Houston Center, while Torch Energy Advisors Inc. committed to a long-term renewal for 25,696 square feet at 4 Houston Center. With the renewals, the 4.2-million-square-foot office complex remains 91% leased.

Both Towers Watson and Torch Energy’s leases were coming up for renewal in 2012, according to Debbie Wilson of Crescent Real Estate. She represented the owner, Crescent HC Investors LP, in both deals. Louie Crapitto of Jones Lang LaSalle represented Towers Watson, and Brett Blanchard, David Anderson and Anthony Fritsche of Fritsche Anderson Realty Partners LLC represented Torch Energy.