Complete ownership concentration analysis of every parcel in St. Clair County, Illinois — the anchor of the Metro East region directly across the Mississippi from St. Louis. This report maps LLC networks, multi-entity ownership clusters, and cross-state management patterns across Belleville, East St. Louis, O'Fallon, Fairview Heights, Shiloh, and all 22 townships.
St. Clair County's position as the Illinois side of the St. Louis metro creates a distinctive ownership landscape where Missouri-based operators manage Illinois holdings and Metro East investors operate across both states.
2,031 ownership concentration clusters across 22 townships. St. Clair County has one of the highest cluster counts of any county in our Illinois coverage. The Metro East's lower property values and proximity to St. Louis attract multi-entity operators who use LLC structures to manage portfolios across Belleville, East St. Louis, O'Fallon, Fairview Heights, and surrounding communities.
Cross-state ownership patterns: Missouri addresses managing Illinois properties. A defining feature of the Metro East market is the prevalence of St. Louis-area mailing addresses on Illinois parcels. The report identifies clusters where entities registered at Missouri addresses control significant numbers of St. Clair County parcels — a pattern that is common in bi-state metro areas but rarely quantified.
Illinois EAV valuations with market value estimates. Illinois uses Equalized Assessed Value (EAV) rather than full market appraisals. The report includes EAV figures and notes that estimated market value is approximately 3x the EAV, giving investors a working valuation framework across all clustered parcels.
East St. Louis and surrounding communities: elevated ownership concentration. Areas with lower property values and higher vacancy rates show proportionally higher ownership concentration, with multi-entity operators assembling portfolios at scale. The report quantifies these patterns without editorializing — the data speaks for itself.
Complete county intelligence package — PDF report and companion CSV — delivered as instant digital downloads.
Executive dashboard, geographic treemap, scatter analysis, township breakdown, top clusters by two ranking methods, entity rosters for top clusters, CSV quick-start guide, full methodology, 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. Includes EAV values for valuation screening.
Understand where multi-entity operators are concentrated across the Metro East and identify submarkets where local capital still has room to operate.
Cross-reference loan applicants against ownership clusters to see the full borrower portfolio across multiple LLC names in St. Clair County.
Identify when buyer or seller entities have concentrated holdings in both Illinois and Missouri — a common pattern in the STL bi-state market.
Identify out-of-state and out-of-county operators who likely need local management partners for their St. Clair County portfolios.
The report is generated from publicly available St. Clair County assessor parcel records. Illinois counties use Equalized Assessed Value (EAV) rather than full market appraisals — estimated market value is approximately 3x EAV. 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. Year built data is not available in this county's data schema.
For complete methodology details, see the methodology page.
PDF + CSV. Instant download. 14-day refund for material factual errors.