NYC DOB permit – how to apply, renew or expedite
A permit is an official authorization from the New York City Department of Buildings (DOB*) that allows specific construction, alteration*, demolition*, or similar work on a building or property. A permit helps make sure the work follows NYC building codes, safety rules, and zoning laws.
There are different types of permits depending on the work: New Building permits for new structures, Alteration permits (Type 1, 2, or 3) for different levels of renovation* or changes, and special permits such as demolition or street work permits. Each permit type clearly states what work is allowed and usually requires plans and DOB approval before the work can start.
Expired permit
Many NYC property owners miss an important detail: Department of Buildings (DOB) permits do not last forever. Most building permits are valid for about one year from the date of issuance, or may expire sooner if the contractor’s license or insurance expires. If you let a permit expire before the work is finished and signed off, you may face delays, extra fees to renew or reinstate the permit, or even violations for expired permits.
Different types of NYC DOB permits (examples)
In New York City, the Department of Buildings (DOB) issues different types of permits depending on the work that will be done. Some common examples are:
- New Building permit – for building a completely new structure.
- Alteration permit (Type 1, 2, 3) – for different levels of renovation or changes to an existing building.
- Demolition permit – for removing (demolishing) a building or part of a building.
- Street or sidewalk opening permit – for work in the street or sidewalk area, for example to install pipes or cables.
- Electrical permit – for electrical installation, upgrade, or repair.
- Plumbing permit – for plumbing work, such as new lines, fixtures, or gas piping.
- Boiler permit – for installing, replacing, or modifying a boiler.
- Elevator permit – for installing or altering an elevator or lift.
- Solar permit – for installing or modifying solar panels on a building, usually filed under an Alteration permit plus any required electrical permits.
Each permit type clearly states what work is allowed and usually requires plans and DOB approval before the work can start.
How to apply for, renew, or expedite a permit
Step 1 – Talk to your design professional or contractor
Most NYC building permits are filed by a Registered Architect (RA), Professional Engineer (PE) or Licensed Contractor, not by the homeowner directly. Your first step is to choose the professional who will prepare plans and file the permit through DOB NOW or BIS.
Step 2 – Confirm the correct permit type
Ask your professional what permit type your job needs (New Building, Alteration Type 1/2/3, Electrical, Plumbing, Boiler, etc.). Make sure the description of work on the application clearly matches what you plan to do inside and outside your home.
Step 3 – Check fees and time
Your professional files the application and pays DOB fees online; you usually pay these costs to the professional as part of your contract. Ask how long the DOB review may take and when the permit will be issued before any work starts.
Step 4 – Renew a permit before it expires
Many NYC DOB permits are valid for about one year from the date they are issued, although a permit may expire sooner if the contractor’s license or insurance expires. If the work is not finished before the permit expires, ask your contractor, architect, engineer, or filing representative to renew it on time to avoid delays, extra fees, or possible violations.
Step 5 – Expedite when the timeline is critical
If your project is time-sensitive, a permit expediter (filing representative) can help move the paperwork faster by preparing complete filings, responding to DOB comments quickly, and tracking the application status. Expediting does not guarantee approval, but it can reduce delays caused by missing documents, incomplete forms, or slow responses. The procedure for filing an application for any of the above permits in New York City can be complex and time-consuming. Hiring a professional expeditor* can save homeowners time, reduce stress, and help them stay in compliance with city requirements.
If you are not sure how to handle the process properly, ask for help. You can use our comment form below or call us for a 15‑minute free consultation.
Step 6 – Always wait for the permit before starting work
Do not start work until the DOB permit is issued and posted at the job site, even if your contractor says the work can begin right away. Starting work without a permit can lead to violations, civil penalties, stop-work orders, and problems when you try to sell or refinance the property.
Even if your contractor or expediter handles the filing, you as the property owner should still know that:
- Owners are responsible for outstanding DOB violations on their property.
- Violations usually must be corrected before selling or refinancing.
- Ignoring violations can lead to additional penalties and enforcement.
revised 3/1/2026
How to make it: Permit Applications Through DOB NOW
If you see any capital letter abbreviations on this page or in an official letter you received from the city and you do not understand them, you can try to look them up on our NYC Violation Codes HUB page with the search tool.
Revised