The star only bought the historic home in Beverly Hills, California six months ago, but is already upgrading the property to suit her needs.
Taylor, who is dating DJ and producer Calvin Harris, has an extensive property portfolio worth a reputed USD 70 million, including homes in New York, Nashville and Rhode Island.
Aerial pictures obtained by website X17.Com show the roof of the mansion covered in blue tarpaulin and a number of builders' trucks in the house's parking area.
The 11,000-square-foot main house comes with six bedrooms, five bathrooms, a two-room guest apartment above the garage, sunken tennis court, swimming pool, and a pool house with kitchenette perfect for squad parties.