Excerpts from the CG Historian's site offer a few clues:

"Both the conical stone tower, built of Port Deposit granite and coated with “Roman cement”, and a one story keepers dwelling were completed by November of 1827"

"In 1884 the keepers dwelling was expanded with the addition of a second story."

"In 1920 the light was electrified and the keepers dwelling sold. (It became an inn for a while.)"