Now offering a 2/1 rate buydown with acceptable offer, giving buyers meaningfully lower payments in the first two years. Set on nearly an acre in coveted Country Club Estates, this 6, 000+ sq ft new construction blends timeless architecture with modern livability. Thoughtfully designed for both everyday life and elevated entertaining, it offers 5 bedrooms, 5 full and 2 half baths, plus a generous bonus room. Inside, 10’ ceilings and 4" white oak hardwoods create a light, airy feel. The chef’s kitchen with Wolf & Sub‑Zero appliances opens to a vaulted great room and intimate hearth room, all flowing to a covered patio with built‑in outdoor kitchen and fireplace for year‑round gatherings. The main‑level primary suite is a private retreat with its own porch and spa‑like bath. A 4‑car garage with EV charging, central vacuum, and zoning for top‑ranked Williamson County schools add everyday convenience. Backyard has been planned with a future pool in mind; professional pool rendering included in photos and detailed plans/pricing available. This is turnkey Brentwood luxury with flexible financing that makes it easier to call 521 Mansion Drive home.