The Heyward-Washington house is one of the properties owned and operated by the Charleston Museum. The home was built in 1772 and is mostly famous because it was the residence of George Washington when he visited Charleston (hence the name).
The house is beautiful and well-stocked with antiques (including a 1680 spinnet, two beautiful canopied beds, and lots of Thomas Elfe originals), but unless you have a particular interest in furniture, I don't know that I would recommend it. The home is small (compared to the other museums), and the tour is short. There is a lovely formal garden in the back and a recreated Colonial kitchen in the original kitchen building, but I'm not sure it is worth the $8 admission price. If you are planning to visit the Charleston Museum and Manigault house, you should see the Heyward-Washington House, because there is a great ticket deal.
The entrance fee for visitors under age 13 is $4, and children under 2 get in for free. The house is open Monday to Saturday from 10am to 5pm and Sunday from 1 to 5pm. Visit www.charlestonmuseum.org for more information.