We have been filing skylight work in this city since 2005. Most of what is written online about skylight permits in New York is wrong, or is repeating something somebody guessed at a decade ago. Here is what the rules actually say, with the sources, and what we still cannot tell you without seeing your roof.
People will tell you that replacing a skylight is exempt because replacing a window is exempt. Here is the problem with that.
The word "skylight" does not appear anywhere in the rule. The rule is 1 RCNY 101-14, which sets out the categories of work that may count as a minor alteration or ordinary repair and so may be exempt from a permit. The window exemption inside it is written for "replacement of existing windows (balcony doors)" and is conditioned on the replacement not requiring "a modification of existing masonry openings." A roof opening is not a masonry opening, and skylights are not named.
So skylights are not exempted by that rule, and they are not expressly excluded either. They are simply not addressed. Anyone who tells you the rule settles it has not read it.
What actually decides it is the Administrative Code. Section 28-105.4.2 says a permit is not required for minor alterations and ordinary repairs. Section 28-105.4.2.1 defines both, and both definitions turn on the same thing: work that does "not in any way affect health or the fire or structural safety of the building."
And the roof rule draws the practical line. The city exempts roof work "limited to the roof membrane, roof coverings, cant strip, and any insulation above the roof deck/sheathing" and requires a permit for "roof repair or replacement that includes replacement of roof deck/sheathing." Above the deck, generally no permit. At or below the deck, permit.
A new skylight opening breaches the deck and usually the framing. That is not a close call. A like for like unit swap into a sound existing curb that does not touch structure is a different conversation, and it is one worth having with the Department rather than assuming.
Sources: 1 RCNY 101-14 (NYC DOB) · DOB, Do I Need a Permit?
This is the part that costs people money. The same rule that grants the exemptions says, in its own words, that they "will not grant authorization for any work to be done in a manner that violates the provisions of this code, the New York City Energy Conservation Code, the Zoning Resolution or any other laws, rules, or regulations," and that they "shall not eliminate the obligation of any owner to file at other City agencies, when appropriate, including but not limited to the Landmarks Preservation Commission."
Even where no Buildings permit is needed, the energy code still applies and landmark review can still apply. Those are separate doors.
The Department of Buildings states it directly: "No work requiring a permit can be performed by a General Contractor without the owner first hiring a Registered Design Professional."
So the sequence is that the architect or engineer is the applicant of record and files the plans, and then, in the Department's words, "after receiving project approval/acceptance, a licensed/registered Contractor can obtain the permit to begin work."
A Home Improvement Contractor licence does not substitute for that. It is a separate requirement on top of it. DOB says "any alteration to a 1, 2, 3, or 4-family dwelling requires a Home Improvement Contractors (HIC) license issued by the Department of Consumer and Worker Protection in addition to a General Contractor (GC) license." We carry LIC# 2084179.
One piece of housekeeping. If a contractor tells you your job is an "Alt-CIII" or an "OP" permit, they are working from vocabulary that no longer exists. Neither appears on the Department's published job type or permit type lists. DOB NOW uses Alteration and Alteration-CO.
Sources: DOB, Project Requirements (Owner) · DOB, Project Requirements (Design Professional) · DOB, Job Types and Codes
This is the most useful thing on this page if your building is landmarked, and almost nobody gets it right.
The Landmarks Preservation Commission has a rule for windows and doors. It covers "the installation of windows and doors at buildings that are Individual Landmarks or are within a historic district or scenic landmark in existing window and door openings." It does not mention skylights.
Skylights appear in a different rule entirely, the one on rooftop additions. There, in the list of non-occupiable rooftop structures, you find "stair and elevator bulkheads, skylights, satellite dishes, unenclosed decks, pergolas, trellises, and privacy screens, fences and railings."
So the standard your skylight is judged against is the rooftop addition standard, and that standard is about visibility. The rule requires that "the addition or structure will not be visible in connection with the primary facade, except such addition may be minimally visible if installed more than sixty (60) feet above the ground." LPC's own guidebook explains that minimally visible "refers to visibility of the addition from its maximum point of visibility when viewed from any public thoroughfare."
| Approval | When it applies | LPC's published timing |
|---|---|---|
| Certificate of No Effect | When the proposed work also requires a Buildings Department permit. Issued by staff, no public hearing. | Often within 10 business days; 30 business days once complete |
| Permit for Minor Work | When the exterior work does not require a DOB permit and is restorative or appropriate in nature. | Often within 10 business days; 20 business days once complete |
| Certificate of Appropriateness | When the work does not conform to the rules or affects protected architectural features. Public hearing plus community board. | About three months; ruling within 90 working days |
Sources: LPC, Permits and Making Alterations · LPC, Certificate of No Effect · LPC, Permit for Minor Work · LPC, Certificate of Appropriateness
The Department states that applications filed on or after March 30, 2026 are subject to the 2025 New York City Energy Conservation Code. As of today that is every new filing. Anything you read that still cites the 2020 code is stale.
| What the 2025 code sets for skylights | Residential | Commercial |
|---|---|---|
| Maximum U-factor | 0.50 | 0.48 |
| Maximum solar heat gain coefficient | 0.40 | 0.38 |
| Skylight area limit | No area limit set | Not greater than 3 percent of gross roof area |
Two things follow, and both come up on real jobs.
Ratings have to cover the whole assembly. Compliance is shown with NFRC ratings for the complete unit, not a centre of glass number off a spec sheet. A product with no label gets assigned penalty default values, which are worse than almost any real unit would score. "It is double glazed" is not a compliance argument.
Replacing the unit is not automatically a repair. Replacing a skylight brings the U-factor and solar heat gain requirements into play. Only a glass only replacement inside an existing sash and frame is treated as a repair. This is one of the most common bad assumptions in the trade.
Source: DOB, Energy Conservation Code. Values from the 2025 NYCECC residential and commercial envelope tables for our climate zone. Confirm the current figures for your own filing.
Bird friendly glass does not apply to skylights. The Department's guidance on Local Law 15 excludes skylights from bird hazard installations, and the law reaches alterations only where all of a building's exterior glazing is being replaced. If somebody is pricing bird friendly glazing into your skylight, ask which section they are reading.
A skylight over a stair may be doing a job you did not know about. The Building Code provides that smoke vents "may be constructed as windows, louvers, skylights, vent ducts, or similar devices, and shall be approved for such use." If the unit over your stair shaft is a required smoke vent, replacing it is not an ordinary repair no matter how much it looks like one. Worth checking before anyone quotes you.
Co-op shareholders cannot file alone any more. Since February 2, 2026 the Department requires a board representative to attest inside DOB NOW that the board authorised the applicant to file, where the owner type is a co-op tenant-shareholder or condo unit owner. That is separate from your building's alteration agreement, which is a private contract nobody at the city regulates. More on that on our page for co-op and condo boards.
We are not selling a permit service. We are a skylight company, and this is the part of the job most people quoting you would rather not talk about.
On a real job we tell you which category we think your work falls into and why, before anyone commits to a budget. We tell you if your building is landmarked and what that is likely to mean. We tell you if the unit you want will clear the energy code before it is ordered rather than after. And we say plainly when the honest answer is that a plan examiner has to decide.
Skylights in New York since 2005. Official VELUX dealer and VELUX Trained & Approved installer. Licensed and insured, LIC# 2084179.
It depends on what the work touches, and no rule answers it outright. The city rule people rely on, 1 RCNY 101-14, does not mention skylights anywhere, and its window exemption is written for windows and balcony doors in existing masonry openings. What the Administrative Code says is that a permit is not required for minor alterations and ordinary repairs, and both are defined as work that does not affect health or the fire or structural safety of the building. So the real test is whether the job stays above the roof deck and leaves structure alone.
Cutting a new opening breaches the roof deck and usually the framing. The city rule that exempts roof work is limited to the membrane, the coverings, the cant strip and insulation above the deck, and it expressly requires a permit where the roof deck or sheathing is replaced. A new opening sits on the wrong side of that line.
The Department of Buildings puts it plainly: no work requiring a permit can be performed by a general contractor without the owner first hiring a registered design professional. The architect or engineer is the applicant of record and files the plans. The licensed contractor pulls the permit after the plans are approved. A Home Improvement Contractor licence does not replace that.
No, and this catches people out. The LPC windows and doors rule covers work in existing window and door openings and does not mention skylights. Skylights appear instead in the rooftop additions rule, in the list of non-occupiable rooftop structures alongside bulkheads and pergolas. In landmark terms a skylight is a rooftop addition, not a window.
Usually yes. LPC guidance says a permit is required for interior work when the work requires a permit from the Buildings Department. Because most skylight work does need a DOB permit, landmark review can be triggered even when the skylight itself cannot be seen from the sidewalk.
LPC issues a Certificate of No Effect when the work also requires a Buildings Department permit, and a Permit for Minor Work when it does not. Where the work does not conform to the rules or affects protected architectural features it goes to a Certificate of Appropriateness, which means a public hearing and the community board. LPC publishes that a CNE is often approved within 10 business days, a PMW often within 10, and that the full COA process takes about three months.
Filings on or after March 30, 2026 fall under the 2025 New York City Energy Conservation Code, so as of today that is every new filing. For a house the table for our climate zone sets a skylight U-factor of 0.50 and a solar heat gain coefficient of 0.40. On the commercial side the table sets U-0.48 and SHGC 0.38, and the code limits skylight area to no more than 3 percent of gross roof area. Compliance is shown with NFRC ratings for the whole assembly, and an unlabelled product gets assigned penalty defaults.
No. The Department's own guidance on Local Law 15 excludes skylights from bird hazard installations, and the law reaches alterations only where all of a building's exterior glazing is being replaced.
Not on your own. Since February 2, 2026 the Department of Buildings requires a board representative to attest inside DOB NOW that the board authorised the applicant to file, where the owner type is a co-op tenant-shareholder or condo unit owner. That is on top of whatever your building's alteration agreement says.
No, and the rule says so. The exemptions in 1 RCNY 101-14 do not authorise work that violates the energy code or the Zoning Resolution, and they do not eliminate the obligation to file at other city agencies including the Landmarks Preservation Commission. No permit does not mean no rules.