The 34-year-old is out of contract in the summer but the Juve director says negotiations over a new deal are progressing well
The veteran midfielder's current deal expires at the end of the season and there have been rumours of interest from Real Madrid, where he would reunite with former mentor Carlo Ancelotti.
However, the club are adamant that he will extend his stay in Turin, having been a key part of the side who have won back-to-back Scudetti since Antonio Conte's arrival.
"As president [Andrea] Agnelli said, Juventus is Pirlo's home," he told La Gazzetta dello Sport.
"The road to renewal is all downhill from here."
Fellow midfielder Paul Pogba is the subject of interest from Paris Saint-Germain but Marotta insists that the Frenchman will not leave Juve.
"We've read about PSG's interest in Pogba, but we have had no official offers. If we did, we would courteously say that we have no intention of selling the player."
The 56-year-old is also hopeful that Juventus can make up for their early Champions League exit with glory in the Europa League, but is wary of a fixture pile-up.
"We have a big squad, which allows us to win every competition. But it is true that there'll be little time between matches," he continued.
"When we play the second leg against Trabzonspor [in the last 32] we arrive in Italy on Friday morning and play against Milan on Sunday at San Siro.
"The national team's schedule doesn't allow us to postpone this until Monday and this is a problem."