This Old House is an American home improvement media brand with television shows, a magazine, and a website. The brand is headquartered in Stamford, Connecticut. The television series airs on the Public Broadcasting Service (PBS) television network and follows remodeling projects of houses over a series of weekly episodes.

Boston PBS station WGBH-TV originally created the program and produced it from its inception in 1979 until 2001, when Time Inc. acquired the television assets and formed This Old House Ventures. WGBH also distributed episodes to PBS until 2019, when WETA-TV became the distributor starting with season 41. Warner Bros. Domestic Television distributes the series to commercial television stations in broadcast syndication. Time Inc. launched This Old House magazine in 1995, focusing on home how-to, know-how, and inspiration.

In 2016, Time Inc. sold This Old House Ventures to executive Eric Thorkilsen and private equity firm TZP Growth Partners (although it continued to have a special partnership deal with its former parent company). On March 19, 2021, Roku acquired This Old House Ventures.

On March 2025 American Public Media and KPCC Los Angeles announced that they will air the radio version of This Old House to Public Radio Stations.