No-heat complaints
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weekly trend
Buildings with a complaint
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Median time to close
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From benchmarked buildings
Complaints through the season
No-heat complaints per week, from October 1.
View as table
Does energy efficiency matter?
No-heat complaints per 100,000 sq ft, by ENERGY STAR score (higher = more efficient). Residential buildings in LL84 only.
View as table
Where complaints come from
No-heat complaints on a ~400 m grid. Larger, darker circles mean more complaints.
Look up a building
Large apartment buildings that report to LL84. Search by address or BBL.
Pick a building to see its score, its complaints this season and how it compares with buildings its size.
Highest complaint rates
Buildings with 3 or more no-heat complaints this season, ranked per 100,000 sq ft.
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Data health
How it works
- Ingest. An AWS Lambda pulls changed 311 heat complaints every morning, reconciling row counts against the city's API before anything is written.
- Warehouse. Files land in S3 and load into Snowflake. dbt dedupes complaints, normalizes LL84's six BBL formats and joins each complaint to the energy score that existed at the time.
- Test & publish. GitHub Actions rebuilds every model, runs the data tests and publishes this page. If a test fails, the page keeps yesterday's data.
Rates pool complaints over floor area, so one huge building can't dominate. LL84 covers large buildings only. Correlation, not causation: a regression controlling for size and age found a small effect (−1.7% complaints per 10 ENERGY STAR points, not significant at 5%). Sources: NYC Open Data 311 Service Requests and LL84 Energy Benchmarking.