Stephenville is economically stable as the service centre for the southwest coast, and see's a lot money flowing in from the Alberta Oil Patch in the form of either A) commuting workers, or B) retirees coming home.
An average 3 bedroom home in a desirable neighbourhood will run around $320,000 - $350,000, like this one in a newer development listed at $349k:
Corner Brook is a bit cheaper but by and large the same. It was the only "urban" centre in the province to see a population decline in the last census, despite being the largest municipality outside the St. John's Metro area.
This 5 bedroom, 3900 sq. ft. home in a neighbourhood equivalent to the one in S'ville above is just $329,500:
Above this price point, homes jump to in excess of $400k for new construction in an established neighbourhood close to parks and 4 bedrooms.
Basically, the top end of the spectrum is very affordable to those fortunate enough to avail of it. If you have money you can get a home here on a "dime" compared to what you would elsewhere. Getting into the market at the low end is sketchy though, you need to spend at least $150,000 to get something respectable and it will most definitely need work, have issues, etc...