I can’t imagine it would be more than a couple hundred bucks assuming they can find an accessible point for it. Mine is in an unfinished room at the corner of the basement where the main line comes in and replacing it took the plumber life twenty minutes.
You can ask the plumber about coordinating with the city for shutoff. Maybe they’d know a guy?
But definitely don’t mess with it if. In my case I couldn’t find my external shutoff when I needed that internal one replaced so I had the city come locate it for me. They uncovered the plate, tested the valve and it broke immediately. Fixing it was a major excavation. The city guy told me how lucky I was that I hadn’t found it and tested it myself.
Mine comes in in our crawl space but I can’t get to where it comes in becasue of a sewer line that runs the width of the crawl and I can’t fit past it.
And I assume the line branches before it travels up into the walls? Or is there a chance it branches after it leaves the crawl space, in which case you could consider opening a wall for the valve.
Yes this is the way to go. I have a shutoff near the pipe that the city water comes in but the valve was nonfunctional. I had to schedule a plumber, then ask the city to shutoff my water on that day, the plumber came and replaced the valve, and the city came back to turn on the water. Basically the same process applies to you but with installing a valve rather than replacing one.
Crazy thing is, one of the methods plumbers use to install a shutoff valve if they can’t turn off the city point is to freeze the pipe before where the new shutoff valve is to be installed. I always thought that was wild.