Table of Contents
- In NYC, alterations are filed through DOB NOW: Build by a NYS-registered architect or licensed engineer acting as Applicant of Record.
- Cosmetic work such as painting generally does not need a DOB permit, but co-op, condo and landlord rules still apply.
- Landmarked buildings add an LPC step, and co-op or condo work adds board approval, often with a reported DOB attestation as of 2026.
- Outside NYC the process runs through the local building department, or the municipal construction office under New Jersey's Uniform Construction Code.
- Simple filings can take weeks and complex ones months, so build permitting time into your schedule before you buy materials.
Ask five New Yorkers how to get a permit and you will get five different answers, mostly about what happened to a cousin in 2009. The process is not mysterious, but it does depend on where you are, what you are changing and who owns the building. A kitchen gut in a Tribeca loft, a deck in Mineola and a bathroom in Secaucus are three different paths with three different offices.
This guide gives you the whole map as of October 2026: what counts as permit work, who is allowed to file, how the NYC Department of Buildings (DOB) process works, what changes with a co-op board or landmark status, and how Long Island and New Jersey differ. Nothing here is legal advice, and rules change, so confirm with the agency that has jurisdiction over your address.
1. What a Building Permit Actually Is
A building permit is official permission from the local authority to start specific construction work. It confirms the plans comply with the applicable code and zoning, authorizes a named contractor to perform the work, and triggers inspections. It is not a contractor's license, a one-time fee or a rubber stamp.
In NYC, most construction work requires a DOB permit. The DOB's guide to obtaining a permit is the official starting point. Cosmetic work such as painting generally does not need a DOB permit, but that does not exempt you from building house rules. If you want a plain-language breakdown of which jobs need one, see our article on when you need a building permit in New York.
2. Who Is Allowed to File
New York City has a clear division of roles.
| Role | What they do |
|---|---|
| Owner or board | Authorizes the work and signs owner forms; co-ops and condos also grant alteration approval |
| Applicant of Record | A NYS-registered Registered Architect or licensed Professional Engineer who files the alteration and certifies plans |
| General contractor | Pulls the permit, carries insurance, performs or supervises work, schedules inspections |
| Licensed trades | Plumber, electrician and others who file for their own specialized permits |
| Special inspectors | Review structural, fire-protection and other elements when the project requires |
Residential remodeling in NYC also requires a Home Improvement Contractor license from the Department of Consumer and Worker Protection. The DCWP license checklist explains the requirements, and we recommend verifying any firm's license and insurance before signing. Our contractor hiring checklist walks through the steps.
3. Types of NYC Applications
DOB filings fall into broad categories.
- New Building (NB). Construction of an entire structure.
- Alteration (Alt). Changes to an existing building that do not change use, egress or occupancy.
- Alteration-CO (Alt-CO). Changes that alter use, egress or occupancy and therefore need an updated certificate of occupancy.
- Smaller work types such as plumbing, electrical and equipment, which have their own filing paths and licensed professionals.
Alterations are filed in DOB NOW: Build, while some permit renewals and certain filings remain in the legacy BIS and eFiling systems. The DOB posts system changes on its service updates page, which is worth checking if a portal behaves differently than expected.
For more detail on the steps, we also break down the process in NYC Building Permits: Requirements, Cost & DOB Process.
4. Step by Step: The NYC Path
- Define the scope. Write down what you are changing, including plumbing, gas, electrical, walls, windows and structure.
- Check building rules. For co-ops and condos, request the alteration agreement and house rules. For landmarks, determine whether LPC review applies.
- Hire a design professional. They develop drawings, calculations and code analysis and become the Applicant of Record.
- Prepare documents. Drawings, owner authorization, contractor information, insurance certificates, and any board approvals.
- File in DOB NOW: Build. The Applicant of Record submits, pays fees and responds to review comments.
- Plan review. The DOB may approve, request revisions or issue objections. Expect at least one round on larger jobs.
- Permit issuance. A licensed contractor pulls the permit.
- Inspections and sign-off. Required inspections are scheduled during the work, and a final sign-off closes it out.
For a homeowner-friendly version of this, see how to get a building permit for your NYC renovation and how do I get a construction permit in NYC.
Why applications stall
Most delays are avoidable. The usual causes are drawings that do not match existing conditions, missing owner or board signatures, an unlicensed or uninsured contractor listed on the paperwork, scope creep after filing (adding a gas line or moving a bathroom wall after approval), and unanswered objections. Another trap is starting demolition before the permit is issued. Even work that seems harmless can draw a stop-work order, and a violation on record can complicate your next filing or a future sale. If scope changes mid-project, ask your design professional whether an amendment is needed before the crew proceeds.
Keep a single shared folder with the approved drawings, permit, insurance certificates, board approval letter and inspection records. Boards, lenders and future buyers all ask for these documents, and having them in one place saves hours. If you would rather not manage this yourself, send us your scope and we will build the checklist for your address.
5. Documents You Should Have Ready
| Document | Why it matters |
|---|---|
| Architectural or engineering drawings | Core of the application; must show existing and proposed conditions |
| Owner authorization and forms | Confirms the owner knows about and approves the work |
| Board or managing agent approval | Required by co-ops and condos before work starts |
| Contractor licenses and insurance certificates | Needed to pull the permit and satisfy the building |
| Asbestos documentation | Required for older buildings when suspect materials are disturbed |
| Landmark approval | Needed for work on landmarks or in historic districts |
In industry reporting, DOB reinstated, effective January 26, 2026, a board attestation inside DOB NOW: Build confirming that co-op or condo alterations are board-approved. Treat that as reported rather than confirmed, and verify with the DOB and your managing agent before filing.
6. Add-On Layers: Boards, Landmarks, Asbestos and Lead
A DOB permit is one layer. Others can apply on top.
- Co-op and condo boards. Most require an alteration agreement, plans, insurance and fees before work begins, and set work hours and elevator use.
- Landmarks Preservation Commission. Landmarked buildings and historic districts need LPC approval for exterior changes and some interior work. Permit types include Certificate of No Effect, Permit for Minor Work and Certificate of Appropriateness. See the LPC permit application page. Landmarked buildings often add roughly 15 to 20 percent to time and budget.
- Asbestos. Disturbing suspect materials in older buildings, commonly those built before 1987, calls for a survey and certified abatement when present.
- Lead. Paid work that disturbs paint in pre-1978 homes requires EPA-certified firms and lead-safe practices.
- Noise and hours. The Noise Code generally limits construction to weekdays around 7 AM to 6 PM unless a variance is approved, and many buildings limit work to about 9 AM to 5 PM weekdays.
7. What Is Changing in 2026 and 2027
A few developments matter for planning.
- Local Law 33 of 2026 enacts a new NYC Existing Building Code that will replace the 1968 code for alterations. DOB says it takes effect July 17, 2027 and will govern all alteration applications. Until then, current rules apply.
- Local Law 47 of 2026 aligns the city energy code with the state code.
- Local Law 102 of 2025 requires residential gas detectors near gas-fed appliances starting January 1, 2027.
- New sidewalk shed rules took effect August 13, 2026, which can affect exterior and facade scopes.
- Cellar accessory dwelling units for one- and two-family homes became fileable in April 2026.
If your project spans a long design phase, ask your design professional which code edition governs your application and when it will be filed.
8. Long Island and New Jersey Are Different
Long Island
Building permits come from the town, village or city building department, such as Hempstead, Oyster Bay, Huntington or Garden City. Nassau and Suffolk counties license home improvement contractors through county consumer affairs. Villages like Mineola may have their own building department and fee schedule, so confirm with the municipality. Check the village or town website for current forms.
New Jersey
Permits are issued by the local municipal construction office under the Uniform Construction Code (UCC), administered by the NJ Department of Community Affairs, Division of Codes and Standards. New Jersey requires Home Improvement Contractor registration with the Division of Consumer Affairs. Our New Jersey building permit guide covers the municipal process in more detail.
9. Timelines and Costs
| Project type | Typical approval path | Planning timeline |
|---|---|---|
| Simple interior filing with no structural change | Design professional files; straightforward review | Weeks |
| Kitchen or bath with plumbing and gas changes | Alteration filing, plumbing sign-offs, board approval | Several weeks to a few months |
| Full apartment gut | Alteration filing, asbestos documentation, board package | Often months before construction starts |
| Landmark or exterior work | DOB and LPC review | Months, with added budget |
| Addition or structural work | Full plan review and special inspections | Months |
Costs vary with scope. Design, engineering and expediting often add roughly 15 to 25 percent on top of construction as a 2026 planning range, and a written, itemized quote governs. For wider budget context, our NYC renovation cost guide for 2026 and Renovation ROI Calculator help you set expectations. For how long approvals take in the city, see how long a building permit takes in NYC.
10. Why Owners Hand Permits to a Licensed Contractor
You can learn the portals. Many owners do, once. The problem is that a permit is not a form; it is a project plan that must survive plan review, a board committee and a site inspection. Mistakes show up as stop-work orders, rejected drawings and months of lost time, and in co-ops they show up as violations of your alteration agreement.
N.Y. Renovation Services is a licensed and insured, in-house design and build team. We handle permitting and co-op or condo board paperwork for you, coordinating the registered design professional who files as Applicant of Record, assembling insurance certificates and the contractor package, and scheduling inspections around your building's hours. We also flag hazards early, whether that is lead paint on an older frame or suspect asbestos in a pre-1987 building, so surveys and abatement do not surprise your schedule.
Because we also build the work, drawings reflect what can actually be constructed in your freight elevator, stairwell and structure. That avoids the redesign loop that happens when a drawing set is finished before anyone has priced it. Our estimates are itemized, with no hidden fees, so design, filing, construction and finishes appear as separate lines you can compare. Our priority services, gut renovation, tile, flooring and interior and exterior painting, are all scoped within one contract, and we donate 5% of total project cost to a nonprofit of your choice.
11. Neighborhoods and ZIP Codes We Serve
Permit issues change with the block. These areas illustrate how.
- Tribeca (Manhattan), ZIPs 10013, 10007: cast-iron lofts and condo conversions in an LPC historic district, with strict alteration agreements and freight-elevator scheduling. See our Tribeca luxury apartment renovations.
- Williamsburg (Brooklyn), ZIPs 11211, 11249, 11206: converted lofts, new waterfront condos and wood-frame row houses, where flood considerations and board rules vary by building. See Williamsburg luxury renovations.
- Jamaica (Queens), ZIPs 11432, 11433, 11435: multifamily buildings, co-ops and mixed-use properties, where occupancy and egress questions come up often.
- St. George (Staten Island), ZIP 10301: ferry-adjacent apartments and Victorian houses, with LPC district review for some properties.
- Mineola (Nassau County), ZIP 11501: the Village of Mineola, with capes and co-ops, where the village and county each have a role.
- Secaucus (Hudson County, NJ), ZIP 07094: townhouses and condos with Meadowlands flood considerations and municipal UCC permitting.
12. Next Steps: Get Your Free Estimate
Begin with three facts: your address, your scope, and whether you own a house, co-op, condo or rental. With those we can tell you which filings and approvals you will probably face before you spend on drawings. If you are comparing firms, the DOB's permit page and our hiring checklist give you the questions to ask. For kitchens and baths, where permits and trades converge, see kitchen remodeling in NYC.
Ready to start? Request your free estimate or call or text (347) 455-1741. We are open Monday through Saturday, 8:00 AM to 5:00 PM, and we serve all five boroughs, Long Island and nearby New Jersey.
Safety Note: All work follows OSHA 30 safety and EPA Lead-Safe practices for pre-1978 homes. Check local permit requirements before starting.
James - Lead Renovation Editor. With over 20 years in renovation and construction, James writes and edits our guides. More about James