Getting a NYC DEP permit for sewer or water main work is one of the most common questions property owners ask — and the timeline can vary significantly depending on the type of work, the borough, and whether it is an emergency. As of 2026, a standard DEP sewer permit application takes approximately 2 to 4 weeks for review and approval. Water main permits follow a similar timeline, though complex projects involving tap connections to city mains may take 4 to 6 weeks. Emergency permits are a different story entirely — when you have a sewer backup flooding your basement or a burst water main, DEP can issue emergency authorization within 24 to 72 hours, allowing work to begin immediately while the formal paperwork is processed. The permit process begins with submitting an application to DEP's Bureau of Water and Sewer Operations, along with engineering plans prepared by a licensed Professional Engineer (PE) or Registered Architect (RA). The plans must show the proposed pipe route, connection details, pipe specifications, and restoration plan. DEP reviews the application for compliance with NYC plumbing code, environmental regulations, and infrastructure compatibility. If the work requires excavating in a public street or sidewalk, you also need a DOT street opening permit, which adds another 1 to 2 weeks to the timeline. DOT permits require a traffic management plan and proof of insurance. In 2026, DEP has expanded its digital submission portal, which has reduced processing times by approximately 20 percent compared to the paper-based system used before 2024. However, certain factors can cause delays: incomplete applications (the number one cause of delays), work near critical infrastructure like subway tunnels or gas mains, projects in historic districts requiring Landmarks Preservation Commission review, and seasonal restrictions during winter months when street restoration is more complex. To speed up your permit timeline, work with a licensed contractor like Sewer and Water Pros who submits complete applications the first time, has established relationships with DEP reviewers, and can navigate the emergency permit process when needed. We handle the entire permit process for every job — no extra charge, no delays.