Houston, TX Sign Company for sign design, custom sign manufacturing, & sign installation of channel letters, pylon signs, digital message centers, LED signs & more! Houston Sign Company is your source for posters, large format signs, decals, POP displays, real estate, retail, and yard signs. Business signs and banners direct customers to your message. Houston Sign Company prints signs, banners, posters, car wraps and decals that can drive business to you.