Menu
Check if a NYC building is landmarked or in a historic district using LPC data.
Install with Codex or Claude Copy this prompt, paste it into Codex, Claude, or another assistant, and let it review the skill page and install it for you.
Based on SOC occupation classification
Look up ACRIS property transaction records for any NYC property — deeds, mortgages, satisfactions, liens, and ownership history. Use when the user asks who owns a building, when it last sold or for how much, or whether there are mortgages or liens against it. NYC only; for permits or violations use the DOB skills.
Look up Board of Standards and Appeals (BSA) variances and special permits for any NYC property. Use when checking whether a lot carries zoning relief — variances, special permits, appeals — that modifies its as-of-right envelope. NYC only; for base zoning controls use /zoning-analysis-nyc.
Look up DOB permit and job filing history for any NYC building — new-building, alteration, and demolition filings with status and dates. Use when the user asks what work was filed or permitted at an address, or to gauge renovation history during due diligence. NYC only; for open violations use /nyc-dob-violations.
Look up open and resolved DOB and ECB violations for any NYC building, with class, status, and penalty detail. Use when the user asks whether a building has violations, stop-work orders, or outstanding ECB penalties. NYC only; for housing-code violations use /nyc-hpd.
Look up HPD violations, complaints, and building registration for residential buildings.
Combined NYC property report — landmarks, DOB permits, violations, ACRIS records, HPD, and BSA variances.
| name | nyc-landmarks |
| description | Check if a NYC building is landmarked or in a historic district using LPC data. |
| allowed-tools | ["WebFetch","Write","Read","Bash"] |
Check if a NYC building is individually landmarked or within a historic district using the LPC Individual Landmark & Historic District Building Database. No API key required.
/nyc-landmarks 120 Broadway, Manhattan
/nyc-landmarks 1000770001 (BBL)
/nyc-landmarks 1001389 (BIN)
Accept one of:
Borough codes: Manhattan=1/MN, Bronx=2/BX, Brooklyn=3/BK, Queens=4/QN, Staten Island=5/SI
Query PLUTO to get BBL, BIN, and building metadata. No API key needed.
By BBL:
https://data.cityofnewyork.us/resource/64uk-42ks.json?bbl={BBL}
By address:
https://data.cityofnewyork.us/resource/64uk-42ks.json?$where=upper(address) LIKE '%{STREET}%'&borough='{BORO_CODE}'&$limit=5
Address normalization: Uppercase, strip unit/apt suffixes. Borough names to codes: Manhattan=MN, Bronx=BX, Brooklyn=BK, Queens=QN, Staten Island=SI. If multiple results, ask the user to pick. If zero, try variations (ST vs STREET, AVE vs AVENUE) or suggest providing a BBL.
Store from PLUTO: bbl, bin (or bldgbin), address, borough, bldgclass, zonedist1, yearbuilt, ownername, numfloors, lotarea, latitude, longitude, histdist.
Parse BBL into: boro (1 digit), block (5 digits zero-padded), lot (4 digits zero-padded).
Use the Individual Landmarks dataset (buis-pvji). Query by BBL first:
https://data.cityofnewyork.us/resource/buis-pvji.json?bbl={BBL}
If no results, fallback by block + lot:
https://data.cityofnewyork.us/resource/buis-pvji.json?$where=block='{BLOCK}' AND lot='{LOT}' AND borough='{BOROUGH}'
Key fields: lpc_name, lpc_lpnumb, desdate, landmarkty, lpc_sitede, lpc_sitest, lpc_altern, address, url_report
Also check PLUTO's histdist field from Step 2 — if it has a value, the property is in a historic district even if not individually listed in the LPC dataset.
## Landmark Status — {Address}
**Status: LANDMARKED / IN HISTORIC DISTRICT / NOT DESIGNATED**
| Field | Value |
|-------|-------|
| LP Number | {lpc_lpnumb} |
| Name | {lpc_name} |
| Designation Date | {desdate} |
| Type | {landmarkty} |
| Site Description | {lpc_sitede} |
| Site Style | {lpc_sitest} |
| Also Known As | {lpc_altern} |
| LPC Report | {url_report} |
| Historic District | {histdist from PLUTO} |
**Implications:** Exterior alterations require LPC Certificate of Appropriateness before DOB permit.
Source: [LPC Individual Landmarks](https://data.cityofnewyork.us/Housing-Development/Individual-Landmarks/buis-pvji)
If not landmarked and not in a historic district: "No landmark designation found for this property."