Barry has seen higher growth in property asking prices than anywhere else in Britain outside of London.
The average cost of a home in the south Wales town has jumped by 10.6% annually, according to property website Rightmove.
It said the average asking price in Barry, which is in commuting distance to Cardiff, now stands at £191,050.
Rightmove property expert Miles Shipside said: "It's great to see Barry named as the country's hottest property market right now.
"It's a great tourist spot thanks to the popularity of Gavin And Stacey, and not forgetting Barry also boasts some quite stunning coastal views."
Recent reports suggest the scrapping of the Severn tolls has encouraged more buyers to look for properties on the Welsh side of the border.
Andrew Fenton, from the Vale of Glamorgan-based Chris Davies estate agents, said: "Barry is the place to be so I'm not at all surprised by Rightmove's findings.
"Property prices here compared with Cardiff and its suburbs are comparatively reasonable."
Mr Fenton added: "I think even five years ago, Barry was popular with home-hunters, but a major factor recently has been the abolition of the Severn Bridge tolls.
"Since then, people in Newport have been priced out of their own town by investors from Bristol, and what have you, so those people have been coming to Barry".
The Rightmove study of asking prices across Britain excluded London.
Llandudno, where property prices have risen by 10.1% over the past year, came in at third place. The average asking price there is now £212,400.