When it comes to the cost of repiping your home many factors come into play.
copper main line |
Second is the labor, homes that will require more labor will cost more to repipe, for example two story homes usally require more work (and alot more holes in your walls) or if your home has slab foundation with a valted celings.
Third is the main line, if your main line going into your home is already copper or PVC usally it wont need to be replaced, but if its galvanized pipe your going to want to replace it. The cost of the main line is usally added extra to the repipe estimate because not every home needs the main line replaced. Thangs that can affect the cost of the main line are the disence between the city meter and the home, another factor is if it has to go under a retaining wall.