Older apartment buildings are common in Park Slope, Brooklyn Heights, and Prospect Heights. Renovating them can involve constraints that do not arise in the same way in new construction, from existing stairs and corridors to building systems installed under earlier codes. A new city code creates a different framework for reviewing that work.
The New York City Existing Building Code (EBC) takes effect on July 17, 2027. Co-op and condo boards, managing agents, unit owners, and their design professionals should understand how its alteration categories and work-area calculations may affect renovation planning. Particularly when several applications are open at once.
What is the NYC Existing Building Code, and when does it apply?
The EBC was enacted on January 17, 2026, as Local Law 33 of 2026, proposed as Intro 1321-2025. It governs the alteration and maintenance of existing buildings, amends the Administrative Code, and repeals the 1968 Building Code. Local Law 42 of 2026 amends the city’s other construction codes and establishes July 17, 2027 as the EBC’s effective date.
Until that date, alteration and maintenance work continues to be governed by the Administrative Code and the 2022 NYC Construction Codes, with an optional Prior Code allowance for eligible older buildings. Beginning July 17, 2027, alteration applications filed on or after that date will be governed by the EBC. The NYC Building Code will continue to govern new construction.
The EBC is organized around the type of alteration, including minor alterations, ordinary repairs, Level 1 and Level 2 alterations, additions, changes of occupancy, structural work, and relocation. The NYC Building Code, by contrast, is organized mainly by building system. The EBC also refers to other construction codes for technical requirements, so a project team may need to consult more than one code.
Check the NYC Department of Buildings’ EBC overview and EBC FAQs when planning work. The filing date is an important transition point, but project teams should confirm how the rules apply to their specific application and scope.
How does the EBC decide whether an alteration is Level 1 or Level 2?
The EBC uses work area to classify many alterations. In plain language, work area is the portion of a building made up of spaces that are reconfigured as shown in the construction documents.
Reconfiguration can include changes to partitions, stairs, mezzanines, ceiling heights, shafts, or openings between floors. Certain window and skylight work required for ventilation can also affect the calculation. Work on exterior walls and roofs is generally not counted as work area, subject to the code’s rules for openings that affect interior spaces.
The distinction is based on work area as a percentage of the building area:
- Level 1: Work area is 50% or less of the building area. Chapter 8 applies, along with the EBC’s general requirements.
- Level 2: Work area is more than 50% of the building area. Chapter 9 applies, with more extensive requirements that may address means of egress, accessibility, structural elements, and mechanical, electrical, and plumbing systems.
Crossing 50% does not automatically mean that every part of a building must be upgraded. The specific requirements depend on the project and the relevant EBC provisions. Some rules can extend beyond the immediate work area, so the design professional should assess the whole scope early.
What does the cumulative work-area rule mean for buildings with multiple renovations?
For qualifying applications filed on or after July 17, 2027, work areas must be considered cumulatively when the applications involve Level 1 or Level 2 alterations and remain open without sign-off. The rule applies even when different unit owners or different architects file the applications.
That can matter in a co-op or condo where separate owners renovate their units at different times. The number of apartments being renovated is not itself the test. The relevant comparison is the combined qualifying work area against the building area.
Consider a simplified comparison:
- In a 30-unit building with a building area of 30,000 square feet, two open applications have work areas of 9,000 and 7,000 square feet. Together, 16,000 square feet is about 53% of the building area, which is above the Level 1 threshold.
- In a 300-unit building with a building area of 300,000 square feet, the same 16,000 square feet is about 5% of the building area.
These figures are illustrative. The registered design professional (RDP) must determine the building area and work area under the code. A small building can reach a percentage threshold with fewer projects, but unit count alone does not determine the alteration level.
The Department of Buildings recommends completing and signing off existing open applications before filing new ones, where appropriate. Boards and managing agents can help by maintaining a building-wide log of applications, work areas, filing dates, and sign-off status. This is coordination, not a reason to split or misdescribe one project’s scope.
How does the EBC address older Prior Code Buildings?
The EBC defines a Prior Code Building as a building erected under building laws in effect before July 1, 2008. Many Brooklyn co-ops and condos fall into this category, including buildings constructed under the 1938 or 1968 Building Codes.
The EBC includes special relief provisions for Prior Code Buildings in areas such as means of egress, fire escapes, and buildings with a single exit. These provisions recognize that an existing building may have lawful features that do not match standards for new construction.
That does not mean an owner can simply choose an old code for new work filed after July 17, 2027. Existing conditions established lawfully under Prior Codes remain lawful and enforceable, but Prior Code provisions do not govern new work filed after the EBC takes effect. Instead, the EBC applies, including any specific relief provisions it provides for older buildings.
Boards should ask the project architect or engineer to identify which conditions are existing and lawful, which portions of the work must comply with current requirements, and whether a Prior Code relief provision applies.
What accessibility requirements should boards consider?
Under EBC Section 306, alterations must not reduce the existing level of accessibility. When work affects an area of primary function, the project may also need to provide an accessible route to that area, subject to the code’s requirements and exceptions.
The EBC sets a cost limit of 25% of the alteration costs for providing the accessible route to a primary function area. That is higher than the ADA’s 20% cost limit. The project’s accessibility obligations depend on the scope and circumstances, so boards should have the design professional assess them rather than assuming the percentage alone resolves the issue.
Are there different rules for limited alterations?
Yes. Under the EBC, a Limited Alteration Application (LAA) does not require a tenant protection plan. Instead, tenant safety notes must be posted at the worksite in a visible location.
The code also allows certain limited window replacement and reroofing alterations to be filed by a licensed home improvement contractor or general contractor. The specific work must fit the applicable EBC provisions; electrical or plumbing work may have separate permit and licensed-trade requirements.
What should boards and managing agents do before July 2027?
The effective date is still ahead, so boards have time to prepare their records and project processes. Practical steps include:
- Inventory open DOB applications. Record the application number, scope, filing date, unit or common area involved, and whether the work has been signed off.
- Coordinate upcoming unit renovations. Give owners and their design professionals a clear building contact for communicating proposed scopes and application status.
- Ask the RDP to assess work area early. Confirm how the project’s spaces are being counted and whether other qualifying applications could affect the classification.
- Review projects likely to be filed after July 17, 2027. Discuss code pathway, accessibility, existing conditions, and potential Level 2 implications before approving a final scope or budget.
- Use DOB’s free training materials. The EBC Resources page includes a multi-part training program and related materials. Questions about the EBC can be sent to EBC@buildings.nyc.gov; broader construction-code questions can be sent to ConstructionCodes@buildings.nyc.gov.
For boards coordinating building operations alongside renovation planning, Brooklyn property management services may be relevant to buildings seeking Property Management Services in Brooklyn Heights, a Property Management Company in Park Slope, Property Management Services in Prospect Heights, or a Property Management Company in DUMBO.
What are the next steps for a planned renovation?
Start with the proposed filing date and a written scope of work. Ask the project’s RDP to explain how the EBC’s work-area rules apply, whether other open applications need to be included, and what sign-offs remain outstanding. Boards can then coordinate records and timing with owners and their design teams.
For official updates, review the DOB EBC overview, FAQs, and free training resources before approving projects expected to be filed on or after July 17, 2027.