17 Apr 2026

NYC Building Code Changes in 2026: What Homeowners Need to Know

As of January 26, 2026, NYC's Department of Buildings requires condo and co-op boards to provide attestation in DOB NOW before permit filing for renovation projects. That's just one of several building code and regulatory changes taking effect this year that directly impact homeowners planning renovations. From all-electric building mandates to new structural permit restrictions, here's what you need to know before starting your next project.

The DOB Attestation Requirement for Co-ops and Condos

The most immediate change for residential renovations is the new attestation requirement. Effective January 26, 2026, co-op and condo building boards must formally attest in the DOB NOW system that they have reviewed and approved a unit owner's renovation plans before the DOB will accept a permit filing.

What This Means in Practice

Previously, board approval and DOB permit filing were largely separate processes. Boards reviewed renovation plans internally and issued approval letters, but this wasn't tracked digitally by the DOB. Under the new rule, the board's attestation is now a required step within the DOB NOW: Build platform itself.

For homeowners, this means the board must complete their digital attestation before your architect or engineer can submit the permit application. If the board hasn't attested in the system, the filing will not proceed.

How This Affects Your Timeline

The attestation requirement adds approximately 2 to 4 weeks to the overall permit timeline for co-op and condo renovations. Boards that previously handled approvals on their own schedule now must complete an additional digital verification step. Some boards may need time to familiarize themselves with the DOB NOW platform, which could cause further delays in the early months of implementation.

The practical takeaway: start conversations with your building's board and management company earlier than you would have in previous years. Submit your renovation plans to the board at least 8 to 12 weeks before your target construction start date to account for both board review and the new attestation step.

All-Electric Building Requirements

Beginning January 1, 2026, new low-rise residential buildings (seven stories or fewer) in NYC can no longer include fossil-fuel systems for heating, hot water, or cooking. This mandate effectively requires fully electric building design for new construction, with only limited exceptions.

Who Is Affected

This rule applies to new construction projects that did not secure a building permit before December 31, 2025. If your project obtained a permit before that deadline, you can still use natural gas, propane, or other fossil-fuel systems. The rule also applies to new low-rise buildings with 50% or more of dwelling units subject to regulatory agreements for affordable housing.

What It Means for Renovations

For most homeowners renovating existing buildings, the all-electric mandate does not directly apply—it targets new construction. However, the shift toward electrification is shaping the broader market. Electricians report increased demand for panel upgrades and heat pump installations, and material costs for electric systems are gradually decreasing as adoption increases.

If you're planning a gut renovation that includes replacing your building's heating system, discuss electric alternatives with your contractor. While not yet required for existing buildings, the trend is clearly moving toward all-electric, and installing electric systems now may increase your property's long-term value.

New Structural Permit Restrictions in DOB NOW

Starting February 2, 2026, the DOB introduced restrictions on how structural permits are issued and renewed when connected to new buildings, enlargements, or changes in use filed as separate alteration filings.

Previously, contractors could file structural work as a separate alteration to bypass certain review requirements. The DOB has closed this loophole by restricting the issuance and renewal of structural permits connected to these types of projects when filed separately.

For homeowners, this primarily affects larger projects involving structural changes to your building. If your renovation includes structural work (removing load-bearing walls, adding floors, or enlarging your building), your architect must now file the structural work as part of the main alteration filing rather than as a separate permit. This may add time to the initial filing but should not significantly change the overall project timeline for typical residential renovations.

Sidewalk Shed Permit Changes

All sidewalk shed permits issued or renewed on or after February 2, 2026, now expire every 90 days. These permits will no longer auto-renew in DOB NOW.

While this change primarily affects building owners and construction managers rather than individual homeowners, it has practical implications for any renovation that requires sidewalk protection. If your project needs a sidewalk shed (common for facade work or upper-floor renovations in multi-story buildings), your contractor must now actively renew the shed permit every 90 days. Failure to renew can result in violations and project delays.

Updated Permit Filing Fees

As of December 21, 2025, Local Law 128 of 2024 raised the minimum DOB filing fee to $130, up from the previous $100 minimum. This applies to all alteration filings (ALT-1, ALT-2, and ALT-3).

While the $30 increase may seem minor, it reflects a broader trend of rising permit costs. Total permit fees are calculated as a percentage of the project's construction cost, so larger projects will see proportionally higher fees. Budget accordingly and ask your architect or expediter for a detailed fee estimate during the planning phase.

The New Existing Building Code

The NYC Existing Building Code (EBC) was enacted on January 17, 2026. However, the code does not take effect until July 17, 2027, as established by Local Law 42 of 2026. Until then, alterations and maintenance of existing buildings continue to be regulated by the current Administrative Code and the 2022 NYC Construction Codes.

Why This Matters for Future Projects

When the EBC takes effect in July 2027, it will govern how existing buildings are altered and maintained, replacing the 1968 Building Code that has been the reference standard for decades. For homeowners planning renovations in 2026, the current codes still apply. However, if your project will extend into 2027 or beyond, discuss the upcoming EBC with your architect to ensure your plans will comply with both current and future requirements.

Flood Risk Area Requirements

Local Law 12 of 2026 requires the DOB to indicate whether a building is located within the 10-year rainfall flood risk area. The department is creating a public webpage with flood risk information, including a link to the flood risk area map.

For homeowners in flood-prone areas of NYC (parts of southern Brooklyn, the Rockaways, coastal Staten Island, and sections of lower Manhattan), this could affect renovation planning. Renovations in flood risk areas may face additional requirements for flood-resistant construction methods, elevated mechanical systems, and specific building materials.

How These Changes Affect Your Renovation Timeline

The cumulative effect of 2026's regulatory changes means that renovation timelines for co-op and condo owners will likely be 2 to 6 weeks longer than in previous years. The attestation requirement alone adds 2 to 4 weeks, and the structural permit restrictions may add review time for projects with structural components.

For homeowners planning renovations in 2026, the most important steps are to start the board approval process early (at least 8 to 12 weeks before your desired start date), confirm your architect is familiar with the new DOB NOW attestation workflow, budget for the updated filing fees, and discuss whether all-electric systems make sense for your project even if not yet required.

FAQ: NYC Building Code Changes 2026

When did the new DOB attestation requirement take effect?

The attestation requirement took effect on January 26, 2026. Co-op and condo building boards must now attest in the DOB NOW system that they have reviewed and approved unit owner renovation plans before the DOB will accept the permit filing. This applies to all alteration filings (ALT-1, ALT-2, and ALT-3) in co-op and condo buildings.

Does the all-electric building law affect my existing apartment renovation?

No, the all-electric mandate applies to new construction of low-rise buildings (seven stories or fewer) that did not obtain a building permit before December 31, 2025. If you are renovating an existing building, the all-electric requirement does not apply to your project. However, if you're replacing heating or cooking systems, electric alternatives are worth considering for long-term value.

Will the new Existing Building Code affect my 2026 renovation?

The Existing Building Code was enacted in January 2026 but does not take effect until July 17, 2027. All renovations filed and completed in 2026 will continue to follow the current Administrative Code and 2022 Construction Codes. If your project will extend into 2027, consult with your architect about potential implications.

How much did permit fees increase in 2026?

The minimum DOB filing fee increased from $100 to $130, effective December 21, 2025, under Local Law 128 of 2024. This applies to all alteration types (ALT-1, ALT-2, ALT-3). Additional fees are calculated based on total construction cost and vary by project scope.

Do the structural permit restrictions affect typical apartment renovations?

For most apartment renovations, the structural permit restrictions announced for February 2, 2026, will not have a major impact. These restrictions primarily close a loophole where structural work for new buildings or enlargements was filed as a separate alteration. If your renovation involves structural changes within your existing apartment (such as removing a wall), your architect will file the structural work as part of your standard alteration filing, which is already the normal process for most residential projects.

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Disclaimer

This content is for informational purposes only. Always consult a licensed contractor and verify local building codes and permit requirements before starting any construction or renovation project. Monarch Contracting Group is fully licensed and insured in New York.

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Need Help Navigating the 2026 Changes?

Building codes and permit rules change, but the fundamentals of a well-managed renovation don't. Monarch Contracting Group stays current on every DOB regulation so you don't have to. We handle permit filings, board approvals, and the new attestation requirements as part of every general contracting project.

Planning a renovation in 2026? Call us at (917) 410-6464 or visit our contact page for a free consultation. We'll walk you through exactly how this year's code changes affect your specific project.

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