The answer to 'how much does supply line cost in my area' is that the cost of a plumbing supply line can vary significantly depending on several factors. Supply lines typically range from $10 to $50 or more, depending on the material, length, and quality. Factors that influence the cost include the type of material (such as copper, PEX, or stainless steel), the diameter of the line, and the length needed to connect your fixtures.
It's important to get quotes from local plumbers or home improvement stores to determine the exact cost for your specific project and location. They can assess your needs and provide a more accurate estimate based on the unique requirements of your home. Additionally, the cost may be higher if the supply line requires additional fittings, valves, or other accessories.