Wiktionary
main house
n. The largest house on an estate or parcel.
Usage examples of "main house".
The main house and surrounding village was the closest thing to a capital center this frontier world had to offer.
Soldiers were everywhere, lying or sitting on beds or on items from a collection of ornate furniture that had come from the main house.
Fortunately there was a good supply of wood cut and stacked in a shed near the main house, so they built up a cheery blaze and Caillean unwrapped the small musical instrument she carried swaddled like a child.