Complete ownership concentration analysis of every parcel in Madison County, Illinois — the northern anchor of the Metro East region. This report maps LLC networks and multi-entity ownership clusters across Edwardsville, Granite City, Alton, Collinsville, Troy, and surrounding communities. Note: Madison County's public data schema does not include property valuations or site addresses; this report focuses on entity-level ownership concentration patterns.
Madison County is a major Metro East market with a complex ownership landscape shaped by its proximity to St. Louis and a diverse mix of industrial, residential, and agricultural communities.
1,860 ownership concentration clusters across 136,146 parcels. Madison County has a high cluster density relative to its parcel count, reflecting a market where multi-entity LLC structures are widely used across Edwardsville, Granite City, Alton, Collinsville, Troy, and surrounding communities.
Cross-state management patterns: Missouri-based operators in Illinois. Like neighboring St. Clair County, Madison County shows significant cross-state ownership — entities registered at St. Louis-area mailing addresses controlling parcels across the river. The report quantifies these bi-state management patterns at the cluster level.
Data transparency note: no valuations or site addresses in source data. Madison County's publicly available assessor data does not include property valuations or site addresses. This report focuses on entity-level ownership concentration, mailing address co-location, and cluster composition. Valuation-dependent metrics such as distress scoring are not available for this county.
Entity-level clustering reveals management hubs. Without site addresses, the report relies entirely on mailing address co-location to identify ownership clusters. This approach surfaces property management offices, attorney addresses, and investment group headquarters that serve as coordination points for multi-entity portfolios.
Complete county intelligence package — PDF report and companion CSV — delivered as instant digital downloads.
Executive dashboard, ownership concentration analysis, top clusters by two ranking methods, entity rosters for top clusters, CSV quick-start guide, full methodology, data schema disclosure, and legal disclaimer.
Structured data covering every entity in every cluster. Open in Excel, Google Sheets, Power BI, or Tableau for custom filtering and analysis. Entity-level data optimized for ownership network mapping.
Understand where multi-entity operators are concentrated in Madison County and identify areas where local investors can compete.
Cross-reference loan applicants against ownership clusters to see the full borrower portfolio across multiple LLC names.
Identify when buyer or seller entities have concentrated holdings in both Illinois and Missouri — essential for bi-state metro closings.
Identify out-of-state and out-of-county operators who likely need local management partners for their Madison County portfolios.
The report is generated from publicly available Madison County assessor parcel records. Madison County's data schema is thinner than some Illinois counties — it does not include property valuations or site addresses. The same normalization, clustering, and scoring methodology used across all NPA reports is applied: owner names and addresses are normalized, mailing addresses with three or more distinct entity names are grouped as clusters, and each cluster receives a composite concentration index. Valuation-dependent metrics are disclosed as unavailable.
For complete methodology details, see the methodology page.
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