Certificate of Occupancy Data
A CO means a building is legally habitable -- tracking CO issuance tells you exactly when new supply actually hits the market.
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Find Me This Data →Overview
What Is Certificate of Occupancy Data?
A Certificate of Occupancy (CO) is the official government approval that declares a building legally habitable and ready for occupancy. CO data tracks the exact dates when new residential and commercial supply enters the market, providing a precise record of construction completion and regulatory approval. This data is collected by local building departments and represents a critical milestone in the real estate development timeline—the point where a project transitions from under construction to available for use. Analysts use CO issuance records to understand housing supply dynamics, reconstruction timelines after disasters, and market readiness of new developments across jurisdictions.
Market Data
Building department records aggregated by city/county and merged with assessor parcel numbers
Data Collection Method
Source: Los Angeles Times
Tracked across California jurisdictions; methodology applicable to multi-jurisdiction tracking
Geographic Coverage
Source: Los Angeles Times
COs issued by day used to plot reconstruction timelines; results standardized to approvals prior to April 1
Reconstruction Timeline Application
Source: Los Angeles Times
Who Uses This Data
What AI models do with it.do with it.
Disaster Recovery Analysis
Track housing reconstruction progress after major events like wildfires by matching destroyed structures to CO issuance timelines, measuring how quickly communities rebuild.
Housing Supply Forecasting
Monitor when new residential units legally enter the market via CO issuance, enabling accurate supply-side analysis and market timing assessments.
Real Estate Due Diligence
Property condition assessments and financial evaluations rely on CO records to confirm regulatory approval status and project completion dates.
Development Timeline Research
Analyze permit-to-occupancy timelines across jurisdictions to understand regulatory efficiency and construction cycle variations.
What Can You Earn?
What it's worth.worth.
Public Records Requests
Varies
Building departments provide CO data via public records requests; fees depend on jurisdiction and processing requirements
Data Licensing
Varies
Pricing for compiled, cleaned CO datasets across multiple jurisdictions typically scales with geographic scope and historical depth
What Buyers Expect
What makes it valuable.valuable.
Precise Issuance Dates
Day-level granularity for CO issuance to enable timeline reconstruction and supply tracking analysis.
Parcel Number Matching
Assessor parcel numbers or property identifiers linked to each CO record for integration with other real estate datasets.
Jurisdiction Identification
Clear attribution of which city or county building department issued each CO for geographic and regulatory analysis.
Standardized Formats
CSV or spreadsheet format with consistent field definitions across jurisdictions to enable multi-jurisdiction analysis.
Property Identifiers
Address and/or GIS coordinates for spatial mapping and matching to construction or permit records.
Companies Active Here
Who's buying.buying.
Analyze housing supply timelines, reconstruction progress, and market readiness across jurisdictions
Verify property completion status and regulatory approval for investment and lending decisions
Track reconstruction timelines after disasters and analyze housing market supply dynamics
FAQ
Common questions.questions.
Why is Certificate of Occupancy data valuable for real estate analysis?
CO data marks the exact moment when new supply legally enters the market—the transition from construction to habitable property. This enables precise measurement of supply timelines, reconstruction progress after disasters, and regulatory approval efficiency across jurisdictions.
How is CO data collected and standardized?
Building departments in each jurisdiction issue and maintain CO records. Researchers merge these records using assessor parcel numbers and GIS coordinates, then standardize formats (CSV/spreadsheet) to enable multi-jurisdiction analysis and timeline tracking.
What is the primary use case for CO data in reconstruction analysis?
After major disasters like wildfires, CO issuance data shows how quickly communities rebuild by tracking day-by-day approvals. Researchers match destroyed structures from disaster records to rebuilt homes in CO databases, creating reconstruction timelines by community.
How do I access Certificate of Occupancy data?
CO records are public and held by local building/planning departments. Data can be obtained via public records requests, typically provided in CSV or spreadsheet format. Compiled datasets spanning multiple jurisdictions and historical periods are available from real estate research firms.
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