The Great House was built in 1745 on the site of the original Great House by the grandson of Richard Hemmings, the first English owner of the property. Over the years many changes have been made to the original structure. When the last owner died he arranged for the property to be given to the Government of Jamaica. It is now a museum owned by the Jamaica National Trust Commission. It explores the rich history of the Seville site.

Seville Great house is symbolic of the English period. After the capture of the island in 1655, New Seville was abandoned by the Spaniards. Edward Long tells us, the English divided up and allotted the land to victorious officers and other soldiers. In this allotment, the city of New Seville became the property of one Captain Hemmings, an officer of the army, thus becoming Seville Estate. 1745, Hemmings’ grandson built the great house on the site of the original house which was built at the end of the seventeenth century.

The house originally consisted of two storeys. The top storey was, however, blown off by hurricane, about 1898, and it was never replaced. The structure is of wattle and daub construction with timber floors and English tiling. The doors of the building are of solid raised panel mahogany. The windows are predominantly sashed, with later modifications, including jalousies. The interior of the house has mahogany arches, which separates the living and dining rooms.
There is veranda, enclosed by a set of square wooden columns, along the entire northern end of the building. It was designed to provide adequate ventilation and sunlight, as well as privacy. There is a projected entrance portico, which forms the landing for bifurcated cut stone steps. The roof finish is of cedar shingles, with a distinct cap and comb feature. There are two pronounced finials at the gabled ends on the eastern and western side of the roof and aluminium gutters in the valley. The floor has a stained timber finish.