Firefighters in Forney were called to Philbeck's Antiques just after 3 a.m. Wednesday.
Fire raced through the warehouse on Highway 80 about 20 miles east of Dallas.
The company specializes in Texas pine reproduction furniture made from vintage wood.
The fire was so intense firefighters called for help from neighboring cities. No injuries were reported.
Fire investigators are still looking for the cause of the fire.
Forney, a city of about 11,000, is known for its numerous antique businesses.