A certificate of appropriateness is an LPC permit for certain projects that alter significant protected architectural features or do not meet the agency rules for staff-level approval. The New York City Landmarks Preservation Commission (LPC) considers these proposals through a full Commission review that commonly includes a public hearing and community board process.
A Certificate of Appropriateness (C of A) is not simply an upgraded construction permit. It addresses whether a proposed intervention is appropriate for a landmark or historic district. Owners often encounter this route with visible additions, demolition, new construction, or removal of important historic elements.
For the full NYC LPC topic directory, including related permits, historic building alterations, research and compliance, visit the NYC LPC Permits and Historic Property Approvals resource center. The NYC Landmarks Preservation Commission Landing Page provides a broader introduction.
Projects can be historically important even when the proposed building use is lawful or the plans are otherwise code-compliant. LPC Commissioners evaluate compatibility with the building and district, the rationale for altering protected elements, materials, design and the effect on historic character.
Applicants may revise a proposed design so it meets published LPC rules and can be approved at staff level instead. Where Commission review remains necessary, the process involves presentation, public input, possible requests for changes, a Commission determination and final permit issuance.
An applicant files through Portico and works with LPC staff on a sufficiently documented proposal. The project may require a presentation to the appropriate community board before the LPC hearing. Commissioners may approve the design, approve it with modifications, request additional information or revisions, or deny it.
After a favorable vote, the applicant may receive a Status Update Letter explaining remaining materials, including final DOB filing drawings where applicable. That letter is not a permit. The owner must wait for the issued Certificate of Appropriateness and any separate DOB authorization before beginning regulated construction.
LPC Commission approval concerns preservation and historic compatibility. DOB reviews building-code and construction requirements; DCP, zoning and other approvals may separately control what can be built. A positive LPC vote does not waive a zoning or building-code issue.
Presentation design, contractor pricing, professional drawings and the final DOB filing set should remain coordinated. The final LPC permit must match the work to be performed; revisions after approval can require an amendment or a return to the Commission.
The hearing process is often a significant project schedule consideration. Build time for staff discussion, a clear presentation, community board review, possible Commission revisions, and final filing drawings before promising a construction start date.
Owners should ask their architect or qualified project professional to maintain an approved-scope comparison during design development so proposed changes can be checked against the issued C of A.
SLK Buildings assists property owners, building managers, developers, business operators and project teams with Commission-level filing coordination, presentation scheduling, document tracking and final drawing workflow. For an initial conversation, share the property address, available photographs, proposed work, existing LPC or DOB permit numbers, and any relevant agency correspondence. SLK can help organize the filing, coordination and next actions, while LPC and the other responsible agencies make their own determinations and licensed professionals carry out the work legally reserved to them.
Disclaimer: SLK Buildings is a private consulting and construction-management firm and is not affiliated with the New York City Landmarks Preservation Commission or any government agency. This information is provided for general educational purposes and does not constitute legal, architectural, engineering, historic preservation, or other licensed professional advice. Applicable LPC approvals, permit requirements, hearings, and compliance obligations depend on the property, proposed work, and current agency rules. Where licensed or qualified professionals are required, those services must be performed by appropriately licensed or qualified providers.
New York City Landmarks Preservation Commission (LPC) requirements can affect a proposed alteration even when the project appears minor. Owners and project teams may need to confirm landmark designation, identify protected features, gather existing-condition photographs, prepare drawings and material information, and obtain LPC approval before starting regulated work.
LPC requirements may intersect with DOB construction permits, DCP zoning or land-use approvals, DOT sidewalk and street permissions, and OATH enforcement proceedings. The correct path depends on the designated property, the proposed scope, the applicable permit category, and whether staff review or a Commission hearing is necessary.
SLK Buildings assists with LPC application coordination, permit expediting, Portico submissions, records research, related professional coordination, agency comments, alteration approvals, landmark violations, and associated multi-agency filings within its confirmed scope of services.
Whether a project is at the research stage, awaiting an LPC response, being revised for a preservation concern, or addressing unauthorized work, maintaining consistent records and clear next actions can help the team coordinate the required approvals.
SLK Buildings provides free educational content to help property owners, business operators, developers, architects, contractors, and project teams understand LPC designation, current permit categories, Portico filing, historic-district alterations, hearings, violations, professional roles, and related DOB and other agency requirements.
For those who prefer professional assistance, SLK Buildings is available to coordinate LPC records review, filing-path research, application preparation, Portico submissions, agency comments and follow-up, design-professional coordination, permit and violation tracking, and connected NYC agency obligations. Final determinations and applicable professional work remain with the appropriate agency and qualified providers.
Disclaimer: SLK Buildings is a private consulting and construction-management firm and is not affiliated with the New York City Landmarks Preservation Commission or any government agency. This information is provided for general educational purposes and does not constitute legal, architectural, engineering, historic preservation, or other licensed professional advice. Applicable LPC approvals, permit requirements, hearings, and compliance obligations depend on the property, proposed work, and current agency rules. Where licensed or qualified professionals are required, those services must be performed by appropriately licensed or qualified providers.
A C of A is Commission-level approval for certain significant or nonconforming proposals; a CNE is a staff-level approval for work that does not adversely affect protected features.
Not necessarily. Applicable rules and the specific design govern review. LPC staff decides whether a proposal qualifies for staff-level consideration.
Project representatives present the proposal, and the public hearing provides an opportunity for testimony under LPC procedures.
No. Obtain the actual issued C of A and any separate DOB or other agency permits first.
Yes. It may ask for modifications, additional materials, or further review before a final determination.
