This tollhouse used to be a tearoom, but as can be seen on the picture below it is no longer open.
The building is on the A3054, north-east of Newport. The road is now a small distance from the house; the old route of the road is presumably what forms the current access road / layby, but even then the house is not on the edge of the road, but a few metres back from it.
This tollhouse is listed Grade II and the details can be found here.
The pictures below were taken in May 2012.