Rebuilding Together Boston, a nonprofit, recently teamed up with the builders from “This Old House” to fix up a home off Humphreys Street in Uphams Corner.

The no-cost repairs were made to the two-family home of 75-year-old Rosalind “Roz” Pendleton, who has lived there for 21 years. She’s a fixture of the community, a retired life coach who volunteers at the polls.

Her home, first built in 1884, needed upgrades inside and out, including a new back deck, stairs, and a backyard patio with lights. The “This Old House” crew got to work, and the experience takes up an episode of “Ask This Old House,” a companion show to the long-running series that focuses on overhauling homes across the country.

The first home of “This Old House” decades ago was a Victorian home by St. Peter’s Church. The show recently returned to Dorchester for its forty-second season to fix up a three-decker a few blocks away, on Mt. Everett Street.

For its part, Rebuilding Together Boston, founded in 1991, has done 520 renovation projects at a cost of $7 million. Contributors, foundations, and corporations support the nonprofit.