The answer to the cost of shut-off valve repair in your area is that it can vary widely depending on several factors. Typically, the cost can range from $50 to $300 or more, depending on the complexity of the repair and your local plumber's rates.
The main factors that influence the cost of a shut-off valve repair include the type of valve (ball valve, gate valve, etc.), the accessibility of the valve, the extent of the damage, and the labor rates in your local area. Additionally, if the repair requires replacing the entire valve, the cost will be higher than a simple repair. It's essential to get quotes from multiple licensed and insured plumbers in your local area to get the best price for your specific situation.