Karl Crompton, 48, bagged £11million on the Lotto in 1996 and settled down with childhood sweetheart Nicole, while doubling his fortune with savvy investments.
Karl was seen maneuvering a wheelbarrow of cement on the site, looking strikingly similar to his days as the country's most desired stag at age 23 - except now sporting a beard.
He then cooly hopped into his black Land Rover Discovery - just one of his enviable fleet of cars he purchased after his big win.
The ex-Comet manager is now believed to have split from NHS nurse Nicole and quit the £3.6m five-bedroom Gothic-style mansion he built for them in Fylde, Lancs.
The luxurious property included a large pond on the land, as well as a property for his parents, Keith and Pat, at the front.
Karl spent £3.5m on holidays and cars in the year after his win, before plowing his cash into his buy-to-let property empire - doubling his fortune to a whopping £22m.
The multi-millionaire also snapped up another property in Vancouver, Canada - all of which could be up for grab as he and Nicole did not sign a pre-nup when they married in 2006.
The couple, who share two kids, got together about a year after his huge win - and now Nicole could get half of her hubby's riches.
She was spotted without her ring as she climbed into a Range Rover bought by Karl last year.
Karl earned the nickname 'Rollover Romeo' after his numbers came up when his mum suggested he buy a ticket.
"My mum and dad and brother helped pick some numbers then I went out with my pals," he told the Sunday Mirror.
"The next morning, I came downstairs to the kitchen and my mum said, ‘You’re looking at a lottery winner. I’ve got four numbers and got £96 or something.'
"So I looked at the numbers and my ticket. Even when Camelot later confirmed the numbers, I couldn’t believe I’d won.
"It was £10,903,198 – a half share of the full Lotto rollover prize."