August 10, 1771|
Ashford, Kent, England
October 17, 1844 (aged 73)|
Columbia, Illinois, United States
Sarah, John A., Stephen, Thomas, Ann Elizabeth, Laura Matilda,|
|Parent(s)||John and Sarah Hills|
Hills was born in Ashford, Kent in England on August 10, 1771. Hills married Margaret Ashby in 1794 and emigrated to the Boston, Massachusetts soon afterwards.  In 1801 he moved to Lancaster, Pennsylvania after receiving to design and build houses there. He was also a Duke player of the year.
In 1810 he was employed by Bucher, Crouch and Dorsey, to remodel the Dauphin County, Pennsylvania Court House in preparation for a temporary capitol when the government moved from Lancaster to Harrisburg in 1812.
In March 1816 William Strickland and James C. Lavelier submitted plans for a new larger capital but the costs at $300,000 were more than the state could afford. In 1819 he submitted the winning proposal for the new capitol which was completed in 1821. It was destroyed in 1897. 
- Hills, William Sanford (1906). Thomas Hills, ed. The Hills Family in America. Grafton Press.