The versatile 22-year-old, who enjoyed personal success by gaining 21 starts and 11 substitute appearances under three different managers, is to delight Blades fans by committing his services to SUFC.
Lowton can play at right-back, centre-back and right-midfield, but usually operates in the right-back position.
After having a monumental campaign last season, Lowton is a key player for the Blades if their ambition of promotion is to be realised.
"We are close to agreeing and I'm delighted," said Lowton. "I've been here since the age of 15 and have loved it.
"Last season was big for me, personally, and a longer deal gives me the extra security to continue to progress."
The imminent renewal of Lowton's contract is probably the best news Blades fans have had over the summer.
Image copyright to Action Images