The answer to 'how much to fix shut-off valve in my area' is that the cost can vary significantly depending on several factors. Generally, the cost to repair or replace a shut-off valve in your home can range from $100 to $500 or more.
The exact price will depend on the type of valve, the accessibility of the plumbing, the complexity of the repair, and the labor rates in your local area. Factors like the age of the home, the material of the pipes, and the difficulty of the job can also impact the overall cost. It's best to get quotes from licensed plumbers in your local area to get an accurate estimate for your specific situation.