sahit-sai /nyc-hpd — HPD Violations, Complaints & Registration
Look up HPD (Housing Preservation & Development) violations, complaints, and building registration for NYC residential buildings. Only applies to residential building classes. No API key required.
Usage
/nyc-hpd 742 Evergreen Terrace, Springfield
/nyc-hpd 3011650045 (BBL)
/nyc-hpd 3388190 (BIN)
Step 1: Parse Input
Accept one of:
- Address + Borough/Zip — "742 Evergreen Terrace, Springfield 62704"
- BBL — 10-digit number (boro 1 + block 5 + lot 4)
- BIN — 7-digit Building Identification Number
Borough codes: Manhattan=1/MN, Bronx=2/BX, Brooklyn=3/BK, Queens=4/QN, Staten Island=5/SI
Step 2: Resolve via PLUTO
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 or suggest providing a BBL.
Store from PLUTO: bbl, bin (or bldgbin), address, borough, bldgclass, zonedist1, yearbuilt, ownername, numfloors, lotarea, latitude, longitude.
Parse BBL into: boro (1 digit), block (5 digits zero-padded), lot (4 digits zero-padded).
Check Building Class
Before querying HPD, check bldgclass from PLUTO. HPD only applies to residential buildings — classes starting with A, B, C, D, R, or S.
If the building class does NOT start with one of those letters, print:
"Building class {X} — HPD records not applicable (non-residential)."
And stop. Do not query HPD APIs.
Step 3: Query HPD Datasets
IMPORTANT: HPD uses boroid (not borough). And block/lot are separate fields — not a combined BBL.
HPD Violations
https://data.cityofnewyork.us/resource/wvxf-dwi5.json?$where=boroid='{boro}' AND block='{block}' AND lot='{lot}'&$order=inspectiondate DESC&$limit=50
Key fields: violationid, violationclass, inspectiondate, approveddate, originalcertifybydate, novdescription
Open HPD Violations
https://data.cityofnewyork.us/resource/csn4-vhvf.json?$where=boroid='{boro}' AND block='{block}' AND lot='{lot}'
Pre-filtered to currently open violations.
Complaints
Note: The complaints dataset uses borough (text like "MANHATTAN", "BRONX", "BROOKLYN", "QUEENS", "STATEN ISLAND") — NOT boroid. Map boro codes: 1→MANHATTAN, 2→BRONX, 3→BROOKLYN, 4→QUEENS, 5→STATEN ISLAND.
https://data.cityofnewyork.us/resource/ygpa-z7cr.json?$where=borough='{BOROUGH_NAME}' AND block='{block}' AND lot='{lot}'&$order=received_date DESC&$limit=30
Key fields: complaint_id, received_date, complaint_status, complaint_status_date, major_category, minor_category, problem_status
Registrations
https://data.cityofnewyork.us/resource/tesw-yqqr.json?$where=boroid='{boro}' AND block='{block}' AND lot='{lot}'
Key fields: registrationid, buildingid, registrationenddate, ownerfirstname, ownerlastname
Step 4: Print Results
## HPD — {Address}
### Registration
| Field | Value |
|-------|-------|
| Registration ID | ... |
| Owner | {ownerfirstname} {ownerlastname} |
| Registration Expiry | YYYY-MM-DD |
### ⚠ Open Violations: {count}
**Class C (Immediately Hazardous):** {count} ⚠
**Class B (Hazardous):** {count}
**Class A (Non-Hazardous):** {count}
| Violation ID | Class | Inspection Date | Description | Certify By |
|-------------|-------|-----------------|-------------|------------|
| ... | C ⚠ | YYYY-MM-DD | ... | YYYY-MM-DD |
### All Violations ({count} total, showing 50 most recent)
| Violation ID | Class | Inspection Date | Approved Date | Description |
|-------------|-------|-----------------|---------------|-------------|
### Recent Complaints ({count} total, showing 30 most recent)
| Complaint ID | Received | Category | Status | Status Date |
|-------------|----------|--------|-------------|
Source: [HPD Violations](https://data.cityofnewyork.us/Housing-Development/Housing-Maintenance-Code-Violations/wvxf-dwi5) | [HPD Complaints](https://data.cityofnewyork.us/Housing-Development/Housing-Maintenance-Code-Complaints-and-Problems/ygpa-z7cr)
If no results: "No HPD violations, complaints, or registrations found for this property."
Conventions
- All dates: YYYY-MM-DD
- Class C violations always flagged with ⚠ (immediately hazardous — must be corrected within 24 hours)
- Open/active items listed first
- If Socrata returns empty array: "No results found"
- If HTTP error: note it and suggest checking the address
- If the user requests, write results to a file