If you have a leaking pipe under your house, the first thing you need to do is identify where the leak is coming from. Once you know where the leak is, you can then determine how much it will cost to fix it. If the leak is in a accessible area and is not too severe, you may be able to fix it yourself with some basic tools and supplies. However, if the leak is in an inaccessible area or is more severe, you will likely need to hire a professional plumber to fix it for you.
The cost of repairing a leaking pipe under your house will depend on several factors, including the severity of the leak, the location of the leak, and whether or not you hire a professional plumber. If you decide to hire a professional plumber, expect to pay anywhere from $50-$100 per hour for labor costs. In addition, you will also need to pay for any materials needed to complete the repair (i.e. new pipes, fittings, etc.). If you are able to repair the leak yourself, you can save money on labor costs but will still need to purchase any necessary materials.