It was built on land vacated by the Shawnee after the Native American nation had been violently forced to move west to Kansas following their defeat at the Battle of Point Pleasant in 1774.

Originally from Ireland, Sloan arrived in the United States after the American Revolutionary War and became an indentured servant of David Van Horn.

Sloan eloped with Van Horn's daughter Charlotte and they settled in the Mill Creek valley, where they built the original stone portion of the house.

The stone house served as a local polling station, and its use as a stagecoach stop ended after the completion of the Hampshire Southern Railroad in 1910.

The Sloan–Parker House and farm are situated within a rural, agricultural section of the Mill Creek valley in southwestern Hampshire County.

The South Branch Potomac River is located across Mill Creek Mountain, approximately 4.4 miles (7.1 km) to the east of the house.

[12] In 1681 Bennet sold his share to Lord Colepeper, who received a new charter for the entire land grant from James II in 1688.

[8][15][16] As conflicts with Native Americans began to ease, Lord Fairfax sought to entice European settlers to inhabit the sparsely populated western lands of his Northern Neck Proprietary.

[17] The Mill Creek valley was one of the first areas of present-day Hampshire County to be settled by Europeans, beginning in the mid-18th century.

[3] Following the American Revolutionary War, Sloan sailed on a passenger ship from Great Britain to the United States.

[20][21] They later moved 7 miles (11 km) southwest of Romney to their property in the Mill Creek valley, where the Sloan–Parker House stands today.

[20] To construct the two-story stone house, Sloan and his wife hired laborers to quarry the native fieldstone and lay the stonework.

[20] Richard and Charlotte Sloan had ten children together (four girls and six boys), and the large house afforded the couple sufficient room to raise them.

[21] Sloan was a fabric weaver by trade, and he and his family developed a thriving weaving industry on their lands in the Mill Creek valley.

[20][21] The present Parker family occupants of the Sloan–Parker House retain several woven coverlets produced by the Sloans.

Their youngest son James won a contest in drawing straws, and was the only one of their ten children to marry when he wed Magdaline Arnold on January 6, 1834.

[21] Two of Richard and Charlotte Sloan's sons, John and Thomas, were active in the military and in local and state politics.

[27] He also served as a delegate to the Virginia Constitutional Convention of 1850, representing a district comprising Frederick, Hampshire, and Morgan counties.

[21] Because of its convenient location along the Northwestern Turnpike, the house served as a regional stagecoach stop and local polling place.

[35][36][37] The Parkers' stagecoach line transported passengers down present-day Green Spring Road (CR 1), Cumberland Road (WV 28), and the Northwestern Turnpike (US 50/WV 28) to the stone house, where the stagecoaches would stop to allow passengers to have meals before continuing the journey to Moorefield via present-day US 220/WV 28.

[31] During the American Civil War, the stone house was visited by both Union and Confederate forces due to its location along the Northwestern Turnpike.

[20][30] Despite its convenient location and the Parker family's Confederate sympathies, the house and its farm did not suffer major damage during the war.

[20] The Sloan–Parker House occasionally served as a polling place for the Junction community after 1900, and it ceased being used as a stagecoach stop following the completion of the Hampshire Southern Railroad in 1910.

[40] While under their ownership and through their efforts, the Sloan–Parker House and an adjacent 1.5 acres (0.61 ha)[41] were added to the National Register of Historic Places on June 5, 1975.

[43][44] She and her husband opened the Sloan–Parker House for tours in 1962,[40] and again in July 1976, when they displayed furniture, glassware, coverlets, and Civil War relics handed down from the Sloan and Parker families.

The original stone section of the house, built of fieldstone, has remained mostly unchanged since its initial construction; slight alterations were made to accommodate the frame addition.

[20][36][49] The north elevation (main façade) has three bays on its first and second stories and one window in the western room of its basement level.

The stone section's east elevation features a small porch and a door, which were built onto the north end of the first floor around 1915.

The entire frame section is covered with wooden shingles and is topped with a steep metal roof with standing seam profiles.