Geraint and Sara tied the knot at St Tewdrics House in October 2015 after buying the property in Chepstow, Monmouthshire, for £2.5million.
The 32-year-old and Sara, 27, loved their own wedding day so much they were convinced others would too.
They now offer the six-bedroom Italianate villa to couples who want to use it for their own “bespoke” big day.
Geraint said: “When we were looking for a venue for our wedding we didn’t want it in a hotel, we wanted somewhere which would be just for our guests.
“That’s when we thought of buying a place, having our wedding there and turning it into a business afterwards.
“We came across this place and instantly thought ‘wow’ – we just fell in love with it.”
The couple spend much of the year in Monaco where Thomas trains, but TV presenter Sara also manages the Welsh wedding venue.
Her father Eifion Thomas, said: “Geraint played a huge part when we started St Tewdrics because the financial implications with starting a business like this are immense.
“It’s pretty good he’s doing quite well on his bike because it pays the bills – or it certainly did at the start.”
Guests at the Thomas’s own wedding included Team Sky teammate Chris Froome and Wales and British Lions rugby player George North.
A statement on the St Tewdrics website says: “With views over the Severn estuary, this beautiful villa is available as an exclusive use wedding venue in which you can create your perfect wedding day and create lifelong memories.”
