BROOKLINE — Though the business they've worked tirelessly to build for the last 12 years was seriously damaged in a fire last night, the Bingham family had reason to celebrate on Friday morning because their dog, Hadley, made it out of the blaze unharmed.

Hadley, a boxer, has been a trusted friend for the Binghams, and the mascot at Bingham Lumber, the family-owned business that lost its showroom and a warehouse in a three alarm fire that started just after 8 pm Thursday night. Luckily, one of the first firefighters on scene, Assistant Chief Scottie Knowles, also works for the specialty lumber company part-time, and knew that Hadley was in his crate in the office, said Rebekah Bingham.

“Scottie was able to go in and get Hadley out, and we're so thankful,” she said. “It's bad enough to lose the building, but it would have been awful for the kids to lose their dog, too.”

“When I was watching the fire on the news, I thought Hadley was gone,” said eight-year-old Gianna Bingham, daughter of owners Rebekah and Tom. “I was so glad when he came home.”

It took more than 100 firefighters from 15 communities in New Hampshire and Massachusetts to extinguish the blaze, said Fire Chief Charlie Corey, and Route 13 was shut down for hours as tankers brought water in from Lake Potanipo. The fire appears to have started in the warehouse in the back, right-hand corner of the building where a stain shop was. Investigators from the state Fire Marshal's office arrived on scene just before 9 a.m. on Friday to try to determine the cause of the blaze.

But before the smoke had even cleared, Tom and Rebekah Bingham and their employees, who all showed up for work on Friday morning, began getting ready to open. An office in another warehouse will serve as temporary headquarters for the operation that serves homeowners, contractors, architects and designers, offering unique reclaimed lumber.

“As soon as the fire department gives us the go-ahead, we're going to be open for business,” Rebekah said.