Edward Rice ordered the construction of a
Jacobean house on the site of an earlier medieval mansion in 1659, A limestone refacing occurred at the same time. Newton House is a
Grade II* listed property, as are its summer house and the inner and outer courtyard ranges. The nearby dairy cottage,
ha-ha, dovecote, fountain, deer abattoir, icehouse, home farmhouse, corn barn and byre/stable range are
Grade II listed in their own right. The authors of
Carmarthenshire and Ceredigion consider the heavily decorated late 17th-century ceilings of the house to be "the finest single architectural legacy among the country houses of the region". As in
Plas Taliaris and several other country houses in the county, the ceilings are panelled, with "thick moulded beams and wreaths in the panels and winged cherubs' heads in the corners". The entrance hall contains a columned Doric screen with a 19th-century ribbed and bossed ceiling. The old dining room to the right of this features a
coffered ceiling dated to the 17th century, containing "low plaster relief mouldings including
guilloché,
acanthus and
egg and dart". The chimney piece has been removed. The drawing room to rear of the property also features a richly adorned coffered ceiling with "frieze bearing rosette bands" and a "centre oval with bay leaf design". The 17th-century staircase features thick
balusters and prominent
finials, with foliage patterns ingrained in the plasterwork of the handrail. A billiard room was added to the house in 1896. A
strongroom with walls and heavy steel fire-proof doors was added in 1914, for the Dynevors to keep their important documents and valuables. On the upper floors are rooms with 18th-century fittings, including "panelled
dados, lugged
architraves, low relief plaster ceilings and closets within angled turrets". The bedroom on the northeast of the house features a particularly detailed coffered ceiling with floral patterns. The house contains several paintings of note, including
William Powell Frith's
Mary, Queen of Scots Bidding Farewell to France (1561) and
Godfrey Kneller's portrait of the Bishop of Salisbury,
William Talbot, dated to 1718. Two showrooms at the house are open to the public. Aside from the tearoom, the exhibition in the basement and ground floor contains numerous displays related to the Rhys family, the history of the estate and World War II, and is designed as if the year is 1912. ==Park and garden==