The answer to 'how much does shut-off valve cost in my area' is that the cost of a shut-off valve can vary significantly depending on your location, the type of valve, and the complexity of the installation. Typically, shut-off valves for residential plumbing can range from $20 to $100 or more, but getting a local quote is essential to determine the exact cost for your specific needs.
The price of a shut-off valve is influenced by factors such as the material (e.g., brass, chrome, or plastic), the size of the valve (1/2 inch, 3/4 inch, etc.), and whether it's a simple inline valve or a more complex angle or gate valve. The cost can also be affected by the accessibility of the plumbing and any additional labor required for the installation.