Whether apartment or townhouse renovation work needs a Department of Buildings filing depends on what changes, the building, and the applicable code path. This guide is general information; the project’s registered design professional or expediter confirms the filing requirement.
Minor work and work needing review
Limited cosmetic work may be treated differently from work that changes plumbing, electrical, gas, structure, layout, egress, occupancy, or building systems. The label “kitchen refresh” or “bathroom renovation” does not determine permit status. The proposed details and existing conditions matter.
Ask the architect to identify which work is within the design scope and whether agency filing, permits, inspections, or sign-off are required. The DOB work permit toolkit is an official starting point, but it does not replace project-specific advice.
Alt-2 and Alt-1 in general terms
An Alt-2 filing generally covers multiple work types without a change in use, egress, occupancy, or certificate of occupancy. An Alt-1 generally applies when those conditions change. This overview is not a decision rule for a particular project; your architect or expediter will confirm the classification and filing path.
A project can involve several trades while still falling under one filing approach, or a scope change can alter the required application. Describe the proposed work accurately and share existing plans and building records with the design professional.
Who prepares and files plans
Required plans are prepared and filed by a registered design professional. The architect coordinates design documents; an engineer may address structural or building-system questions; an expediter can advise on the filing process. The general contractor coordinates construction against the approved documents and communicates field conditions to the design team.
Building or landlord approval is separate from city filing. A co-op or condo may require an alteration package even when a particular scope does not need a DOB permit. Conversely, an agency filing does not replace building approval. Track both processes independently.
Co-op and condo board attestation
The DOB NOW service notice describes the February 2, 2026 workflow change for Condo Unit Owner and Co-Op Tenant-Shareholder filings: a board representative participates in the filing and records the board’s authorization. Ask the project expediter how to schedule that step.
Your design professional or expediter confirms whether this applies and coordinates the filing. Read the DOB service notice. Owners should include the board authorization step in the submission plan and not treat it as automatic.
Inspections and close-out
Some work requires inspections or tests at specified milestones. The design professional identifies required checkpoints and coordinates the appropriate sign-offs. Do not close walls or conceal work before any required inspection or documentation step is complete.
After construction, the filing may require sign-off or other close-out documents. The architect or expediter confirms the agency status and outstanding requirements. Building management may have its own inspection or close-out process, which is separate from agency records.
Planning the sequence
Before construction, align drawings, building review, filings, permits, material selections, and access. Board review can take weeks; review and filing periods vary. A schedule should show dependencies and unresolved decisions rather than promise an unsupported completion date.
If demolition reveals conditions that differ from the plans, notify the architect or engineer. They determine whether revised documents, additional review, or an inspection is needed. A contractor should not make an undocumented design change to avoid a filing question.
Sources and next steps
Read the NYC DOB work permit toolkit. For an apartment project, ask the registered design professional to state in writing whether a filing is required, who files, which permits are needed, and what inspections and sign-offs apply.
Related reading: co-op alteration agreements and landmark review for brownstones.
Questions to ask your design professional
Ask which portions of the work require a filing, who will prepare and submit the plans, what permits must be obtained before work, and which inspections or sign-offs are anticipated. Ask how a proposed change in layout, structure, or systems could affect the filing. These questions create a project-specific plan without relying on a generic renovation label.
Confirm what documents the contractor needs and who will provide approved drawings and updates. Keep permit records and inspection notes with the project file. If the building has an alteration process, identify its requirements separately and make sure the scope submitted to the board is consistent with the design documents filed with the agency.
Keep project records aligned
Maintain a record set with approved drawings, permit documents, inspection information, and written design responses. Give the field team the current revisions and remove superseded versions from active use. If the scope changes, the architect or expediter can determine whether documents or filings must be revised.
Building work rules should be tracked separately from DOB documents. An alteration agreement may impose its own approval, insurance, access, or sign-off conditions. A city filing does not satisfy the building’s requirements, and a building approval does not substitute for an agency filing when one is required.
The owner can ask the design professional to explain how a proposed scope relates to the filing and which work cannot start until permits or approvals are in place. This creates a clear handoff between design, agency review, building review, and construction.
Keep construction and agency records clear
The permit set and construction set should remain coordinated. If the architect issues a revision, identify what changed, which trades are affected, and whether filing or inspection requirements need to be revisited. The contractor should receive the current approved information before performing changed work.
Inspection checkpoints should be identified before affected work is concealed. Confirm who requests the inspection, who must attend, what records are needed, and whether the next trade can proceed. Requirements depend on the filing and scope, so obtain project-specific direction from the registered design professional.
Maintain copies of permits and sign-off documents with the property records. At close-out, ask the architect or expediter what remains open in the agency system and what documentation the owner should keep. Building management may have a separate completion process; track that independently.