This comes up more often than you’d think, and it’s smart to ask before spending money. In most places, responsibility is split based on where the water line runs. The city usually handles the main line and sometimes the part under the street, while the homeowner is often responsible from the property line to the house. That said, every city has its own rules, and assumptions can be expensive. A clear breakdown with real examples is explained in https://bens.plumbing/blog/who-is-responsible-for-water-line-from-street-to-house/ . It helps you understand what’s typical, what exceptions exist, and why checking local regulations matters. Reading this first can save time, stress, and help you ask the right questions when you talk to the city or a plumber.