Understand landmark permits.

Historic designation allows homes to evolve, with proposed changes reviewed for their effect on the building and district. LPC generally regulates exterior alterations throughout a designated property: the rear elevation, roof and yards matter as well as the street-facing façade. Visibility can affect the standards and review route; it does not create a general exemption. Even a project that needs no Department of Buildings permit may need LPC approval. LPC Permit Guidebook, Introduction, pp. 0.10–0.11

Before making a renovation assumption, confirm the address and lot within the district, read the designation report, and assemble photographs showing what survives today. Keep three questions separate: what LPC finds appropriate; what building and zoning requirements permit; and what the existing structure can support. Zoning compliance does not obligate LPC to approve a design. LPC: Permits and Making Alterations

For current requirements, begin with the LPC Rules page and the Permit Guidebook. The Rules page reviewed September 23, 2026 links the operative compilation effective July 25, 2024 and separately lists proposed July 2026 amendments. Proposed changes are not adopted requirements; recheck their status when planning a filing.

Permit labels describe the approval route, not the project’s cost. A “minor work” permit can cover substantial restoration. Confirm the route for your actual scope.

All LPC applications and supporting submissions now go through Portico. The portal directs qualifying applications to expedited services; the assigned preservationist determines whether the proposal meets the staff rules and whether the submission is complete. A hearing approval may still require final filing drawings and a subsequent issued permit. A presentation or application receipt is not permission to start work. Apply on Portico

• Ordinary maintenance exemption

  When it may fit

  Qualifying repairs that preserve existing materials and appearance

  What a townhouse buyer should understand

  An exemption for a specific task does not exempt the rest of a renovation. See the maintenance section below.

• Certificate of No Effect — CNE

  When it may fit

  Work requiring DOB approval that staff finds does not adversely affect protected features; examples include qualifying interior renovations and mechanical equipment

  What a townhouse buyer should understand

  LPC staff can issue it without an LPC public hearing or community-board presentation. “No effect” does not mean no construction. CNE guidance

• Permit for Minor Work — PMW

  When it may fit

  Appropriate or restorative exterior work that does not require a DOB permit; examples include qualifying window replacements and masonry cleaning

  What a townhouse buyer should understand

  It is an LPC staff approval. The absence of a DOB permit requirement does not remove LPC review. PMW guidance

• Certificate of Appropriateness — C of A / COA

  When it may fit

  Work affecting significant protected features that does not meet the staff-level rules

  What a townhouse buyer should understand

  The proposal goes through community-board presentation and a public hearing before the Commission. Examples can include additions or removal of significant features, depending on the design. COA guidance

Routine tasks can often proceed without an LPC permit. Examples include replacing broken window glass, caulking around windows and doors, and repainting an exterior to match the color present at designation or subsequently approved by LPC. A color change, extensive restoration, new opening or replacement assembly should be assessed separately. LPC: Permits and Making Alterations LPC Restoration guidance, p. 1.11.

LPC's window guidance also identifies ordinary repairs such as hardware replacement, weatherstripping, interior storm windows and limited repair of existing wood or metal components. This is different from removing the whole window. The permitted extent and method matter. Windows and Doors, p. 2.3

Interior work needs an LPC permit when it requires a DOB permit or affects the exterior—for example, a new kitchen exhaust penetration or HVAC louver. Separately designated interior landmarks have additional protection. Do not interpret “historic district” as requiring LPC selection of every interior finish, or assume that an interior renovation never involves LPC. LPC: Permits and Making Alterations

DOB has its own permit requirements. Most construction requires a DOB permit; construction plans are generally filed by a New York State registered architect or professional engineer. Ask the design professional to identify each agency filing and the sequence needed for the complete project. DOB: Obtaining a Permit

Use LPC's permit search for applications and issued permits from January 1, 2016 onward. A pending application's work description is applicant-supplied and can change; read the actual issued permit and approved scope when available. Older application records can be requested through LPC's records-access process. LPC Permit Search

Check both BIS and DOB NOW. DOB's records are divided between them, and the public DOB NOW portal does not display every violation or older filing. Drawings may need a separate records request. Compare the seller's plans and completion documents with the building as it stands. DOB: Find Building Data, DOB NOW Public Portal FAQ

An earlier owner's unauthorized work can remain the current owner's responsibility. Payment of a fine does not cure the underlying LPC violation. Corrective work may require approval, alteration or removal; after completing corrective work authorized by an LPC permit, request a Notice of Compliance to document that the correction was properly completed. Active landmark violations can also affect DOB permits. LPC Violations, Correct a Violation

Buyer request list: issued LPC permits and approved drawings; amendments; compliance letters; DOB applications, permits and completion records; occupancy evidence; warning letters and summonses; and records supporting conspicuous alterations such as replaced windows, removed stoops or rear extensions. Ask the attorney and design professional to reconcile unresolved items before relying on the seller's renovation description.

For scheduling, distinguish design preparation, an application being declared complete, agency review, permit issuance, procurement and construction. Published LPC review periods are not a promise of the entire project's duration. Actual design revisions, materials, structural findings and multiple agency requirements must inform the schedule and cost plan. Apply on Portico