The Slate-Roof House was built on the southeast corner of Second Street and Norris Alley, the site for many years of the Chamber of Commerce. The house was built by Samuel Carpenter, and it stood until 1867.

Besides being the residence of Penn in 1699, James Logan entertained Lord Cornbury there in 1702 and Governor James Hamilton, Mrs. Howell and Mrs. Graydon were successively its occupants, the ladies using it for a boarding house.

Alexander Graydon, who lived there and whose mother was the Desdemona of the pert British officers of the day and kept the place as a boarding house just before the Revolution, describes the old house, “as a singular old-fashioned structure, laid out in the style of a fortification, with abundance of angles, both salient and re-entering. Its two wings projected to the street in the manner of bastions, to which the main building, retreating from sixteen to eighteen feet, served for a curtain. Within it was cut up into a number of apartments and on that account was exceedingly well adapted to the purpose of a lodging house, to which it had long been appropriated.”

The yard or garden was graced with a row of venerable pine trees, and the association of the place gave it a substantial historic interest. It bore much less the look of a fortress than Captain Graydon’s military eye conceived.

The back building was as peaceful looking as the culinary offices should be and the neat little chambers in the so-called bastions were cozy nooks, with chimney places in the corners. The kitchen had a giant pile of chimney, with a great fireplace and the garrets were high and roomy.

This house was built for Samuel Carpenter by James Portens. It was erected about 1698, and William Penn was probably its first occupant.

Samuel Carpenter had built in 1684–85 a house on Front Street, near his wharf and warehouses, and it is likely he lived there after the Slate-Roof House was completed.

Carpenter was a man of great ability and enterprise, accumulating wealth rapidly and doing much to build up the city of his adoption. He married Hannah Hardiman, a Welsh Quakeress and preacher, in 1684, and held many important positions, member of the Assembly, treasurer of the province, etc. He bought large tracts of land, owned numerous vessels, mines, quarries and mill seats, so much property, in fact, that it impoverished him and threw him into serious pecuniary embarrassment, though he was ranked as the richest man in the province.

Samuel Carpenter died in his house on King Street (now Water Street) between Chestnut and Walnut Streets, April 10, 1714, and the Friends Meeting, after his death, said of him that “he was a pattern of humility, patience and self-denial; a man fearing God and hating covetousness; much given to hospitality and good works. He was a loving, affectionate husband, tender father, and a faithful friend and brother.”

When Carpenter leased his Slate-Roof House to Penn it was furnished and so occupied until his departure for England, when James Logan moved into it.