Key takeaways
- The 40-foot cap lets an owner reduce sidewalk shed coverage to forty feet from the building, but only for maintenance or repair of a plain facade. It came in with Local Law 47 of 2025, effective August 15, 2025, as exception 3 to BC 3307.6.3.
- The Department is explicit that it is not a hard cap: "It is an exemption one may utilize to reduce sidewalk shed coverage down to 40ft." Sheds can still run further where other code provisions require it.
- A plain facade has no setbacks above the second story and no projections above the second story, other than air conditioning units or window lintels and sills.
- The registered design professional decides which exposures qualify, marks them on the shed drawings, and notes that no non-maintenance work needing a shed may be done there. Contractors and owners can be violated if that note is ignored.
In this article
Sidewalk sheds are the most visible and most resented object in New York construction, and the city has spent two years trying to make them smaller and shorter-lived. The 40-foot cap is part of that effort. A year after it arrived, the Department published a bulletin explaining what it actually permits — because it was being read as something it is not.
Where the cap comes from
The rule for sheds starts at BC 3307.6.2, which generally requires a sidewalk shed for facade work above forty feet, and BC 3307.6.3, which can extend the shed's coverage along the building by five or twenty feet depending on the condition.
Local Law 47 of 2025, effective August 15, 2025, added a third exception to that section — the 40-foot cap. The Department's clarification is Operational Buildings Bulletin 2026-015, issued September 22, 2026 and signed by Deputy Commissioner Constadino Sirakis, P.E.: bb_2026-015.pdf.
What the cap is, and what it is not
The cap lets a building owner reduce the length of shed coverage to forty feet measured from the building, in place of the longer coverage the section would otherwise require.
The bulletin then spends most of its length saying what the cap does not mean, which tells you how it was being misread.
It is an option, not a limit. In the Department's words, "The 40ft cap is not a hard cap. It is an exemption one may utilize to reduce sidewalk shed coverage down to 40ft." A shed may be longer, and the bulletin notes that sheds "may have to be installed beyond the areas illustrated in order to comply with other Code provisions."
It is only for maintenance and repair. The bulletin states plainly that "the cap does not apply to the construction or demolition of a building." Recladding, a new facade, or work that goes beyond routine maintenance is outside it.
It does not override the Commissioner. A unique hazard at a particular site can still produce an order for a larger shed.
And in the other direction, areas outside the normal coverage zone can remain unshedded even where they fall within forty feet. The cap is about reducing a requirement, not about creating one.
What counts as a plain facade
This is the test, and it is short. The building must have:
- no setbacks above the second story, and
- no projections above the second story, other than air conditioning units or window lintels and sills.
A cornice, a balcony, a bay, a decorative band — any of those above the second story takes the facade out of plain, and the cap with it.
What has to be on the drawings
The judgment is the registered design professional's, not the contractor's and not the shed supplier's. The bulletin requires the professional to determine whether the facade is plain and to indicate on the shed drawings which exposures qualify.
The drawings must also carry a note that no non-maintenance work requiring a shed may be performed on those exposures. That note is the Department's enforcement hook, and the bulletin says so: contractors and building owners "may be subject to violations" if such work is done on a capped exposure.
Existing sheds are not frozen out. A shed already up can be reconfigured to use the cap, with amended drawings that have been accepted.
The trap for a contractor
Read the sequence and the risk is obvious. The shed is designed for maintenance, capped at forty feet, with a note on the drawings saying only maintenance happens on that face. Then the scope grows, as scopes do — a section of brick comes out, a lintel is replaced, something becomes a repair that is really a reconstruction.
At that point the shed no longer matches the work, and the violation exposure sits with the contractor and the owner, not with the professional who drew it.
If the scope changes, the drawings change first.
The permit side of the same shed is in 90-day permits and progress reports, and the proposed alternative to a shed altogether is containment netting.
Frequently asked questions
Does the cap mean my shed cannot be longer than forty feet?
No. The Department describes it as an exemption that may be used to reduce coverage to forty feet, not a limit. Sheds can and sometimes must run further to comply with other provisions.
Can I use the cap on a new building?
No. The bulletin states that the cap does not apply to construction or demolition of a building. It is for maintenance and repair.
Who decides whether the facade is plain?
The registered design professional, who must also mark the qualifying exposures on the shed drawings.
We already have a shed up. Can we shorten it?
The bulletin allows an existing shed to be reconfigured to use the cap, with amended drawings that have been accepted.
What happens if we do other work behind a capped shed?
The drawings carry a note forbidding it, and the Department says contractors and owners may be subject to violations. Amend the drawings before the scope changes.
Conclusion
The cap is a genuine saving on a plain building getting ordinary repairs, and a trap on everything else. The two sentences to carry away are that it is an option rather than a ceiling, and that it covers maintenance and repair only. Everything else follows from what the design professional writes on the shed drawings — which is also the document the Department will read if the scope drifts.
Written by the engineers and laboratory technicians of Metric Consulting and Inspection, a Class 1 special inspection agency with a DOB-licensed concrete testing laboratory in Hicksville, New York, serving NYC construction since 2003.