Machinations of the Slave Lords!
The former hideout of the Redbrand Roughians, this manor served a few hundred years ago as the homestead of the local lord. It fell into ruins after the original fall of the Spell Forge and the loss of the Mines of Phandelver. Since then, it has been cleared out and reclaimed by our heroes; the land and its structure were awarded to Punty in recognition of his ongoing service to the Alliance, and he has even been given help rebuilding it into a thriving inn run for our heroes by the Widow Dendrar and her children. The dungeon complex beneath the manor now serves as a private base of operations for the heroes.
Trensadar Manor is detailed on pages 20 to 26 of the Lost Mine of Phandelver adventure.