The interior of the mansion features a center-hall floorplan, with a 10 feet (3.0 m) wide formal entrance hall running north to south, with two rooms on each side of the hall.
On the first floor there are double parlors to the west, and on the east are the dining room and library.
The adjacent parlors are largely furnished as one, with twin black marble fireplaces, gilded mantel mirrors and chandeliers that hang from the 14 feet (4.3 m) high ceilings.
The wide doorway, that can be closed off as needed, between the two rooms is ornately trimmed with fluted Ionic columns and an entablature with egg-and-dart molding.
The same egg-and-dart molding can be found articulating the ceiling as well.
An unusual feature found in both parlors, as a result of the mansion being built in the strict accordance to Greek Revival style of architecture, are the pair of doors found on the east side of the rooms.
One of the doors opens only into a wall; this was necessary so that the entrance door from the hall would have a match.
The library with its highly stylized decorative ceiling done in gold leaf, deep red and blue, is separated from the dining room by a passageway that leads to the service wing.
The dining room features a botanical wallpaper from the French manufacturer Zuber, that uses a technique called British Transfer, where each color in the pattern is separately stamped onto the paper.
The chandelier is adorned with Bacchus, the Greek god of wine.
The service wing is divided into two nearly square rooms: the service room and kitchen.

The upper stories are accessed by a self-supporting staircase, trimmed with a Greek key design, found at the midpoint of the entrance hall that corkscrews up to the cupola.
The cupola provides natural light to the center of the house via a skylight.
The second floor plan of the main block of the house, corresponds to the layout of the lower level, with bedrooms in the four corners.
However, two small rooms are found at each end of the central hall, a study on the north end, and a nursery on the south that connects to the bedroom in the southeast corner.
The private quarters of the family are less ornate than the main level, and the ceiling height decreases to 12 feet (3.7 m).
The servants wing houses an additional bedroom and bath, a servant's bedroom, and a stairway to the first level.
The third floor, plainly decorated and with ceilings just over 6 feet (1.8 m), housed smaller children, additional servants quarters and storage space.
The interior of the mansion features a center-hall floorplan, with a 10 feet (3.0 m) wide formal entrance hall running north to south, with two rooms on each side of the hall. On the first floor there are double parlors to the west, and on the east are the dining room and library. The adjacent parlors are largely furnished as one, with twin black marble fireplaces, gilded mantel mirrors and chandeliers that hang from the 14 feet (4.3 m) high ceilings. The wide doorway, that can be closed off as needed, between the two rooms is ornately trimmed with fluted Ionic columns and an entablature with egg-and-dart molding. The same egg-and-dart molding can be found articulating the ceiling as well. An unusual feature found in both parlors, as a result of the mansion being built in the strict accordance to Greek Revival style of architecture, are the pair of doors found on the east side of the rooms. One of the doors opens only into a wall; this was necessary so that the entrance door from the hall would have a match. The library with its highly stylized decorative ceiling done in gold leaf, deep red and blue, is separated from the dining room by a passageway that leads to the service wing. The dining room features a botanical wallpaper from the French manufacturer Zuber, that uses a technique called British Transfer, where each color in the pattern is separately stamped onto the paper. The chandelier is adorned with Bacchus, the Greek god of wine. The service wing is divided into two nearly square rooms: the service room and kitchen.
The upper stories are accessed by a self-supporting staircase, trimmed with a Greek key design, found at the midpoint of the entrance hall that corkscrews up to the cupola. The cupola provides natural light to the center of the house via a skylight. The second floor plan of the main block of the house, corresponds to the layout of the lower level, with bedrooms in the four corners. However, two small rooms are found at each end of the central hall, a study on the north end, and a nursery on the south that connects to the bedroom in the southeast corner. The private quarters of the family are less ornate than the main level, and the ceiling height decreases to 12 feet (3.7 m). The servants wing houses an additional bedroom and bath, a servant's bedroom, and a stairway to the first level. The third floor, plainly decorated and with ceilings just over 6 feet (1.8 m), housed smaller children, additional servants quarters and storage space.
Lanier Mansion