Work began on the Essex cottage in the spring.

Cast member and general carpenter Tom Silva, right, spoke with homeowner John Corcoran while taping "This Old House."

Cast member and Master Carpenter Norm Abram, (right) taped a segment of "This Old House."

Director Thom Draudt, (left) gave instructions to cast member and Master Carpenter Norm Abram.

1,700-square-foot cottage was built circa 1935 for Irene Hammond, wife of prolific inventor John Hammond.

Plumber Kevin Bilo installed radiant floor heat during a taping.

The 11-episode Essex story will air on WGBH and other PBS stations beginning in mid-January.

“Everything is done at world-class levels,” Corcoran said. “And you don’t have to worry about your roof leaking.”

Workers put down sod as part of the renovations.