"...we walked on the Ice to the House which is building on Francis' 200 acre Lot of Land. It is called Castle Frank built on the plan of a Grecian Temple..."
- January 23rd, 1796	Castle Frank

In the spring of 1794, construction began on Castle Frank, the Simcoe summer residence. Situated on 200 acres of land, Castle Frank stood on a steep hill overlooking the Don Valley. It was named after the Simcoes' then five-year-old son Francis who was to inherit the residence. The house was still under construction when they returned to England in 1796. In 1829, Castle Frank burned down.

	"The Governor having determined to take a Lot of 200 acres upon the River Donn for Francis, & the Law obliges persons having Lots of land to build a House upon them within the year we went today to fix upon the spot for building his House."
Castle Frank Near York	- Sept 29th, 1793

In May 1794, Elizabeth returned to Niagara where Governor Simcoe had re-established himself in Navy Hall.