This map is a visual interface. For keyboard and screen-reader access to the same data, use the search box above (labeled "Search by address, owner, group, or principal name") or the Query Console chat panel. Selecting a property or owner there reads out its ownership details.
An interactive map of corporate-owned property in New Haven, built from public records.
Replay intro Findings / Data notes
Many New Haven rental properties are owned by LLCs and other entities whose names do not identify the people involved. State business filings list principals and registered agents, but connecting entities across thousands of parcels by hand is slow. This site puts those public records in one place.
Elm City Explorer links 4,510 of 7,423 corporate-owned parcels to 399 ownership groups using public records. It answers questions like: Who is the owner of record for this address? Which other parcels are linked to the same group? When did a parcel last change title?
Many owners hold property through separate single-purpose LLCs. For example, the 850 parcels linked to the Mandy group are held under more than 100 owner names. Entities are linked by:
Shared Principals Same person listed as principal across multiple LLCs
Shared Agents Same registered agent, excluding law firms, attorneys and agent services
Shared Addresses Same business address (excluding known law firm offices)
Pattern Matching Naming conventions (e.g., "NETZ *", "NHCD *", "BBYM *")
Reviewed List A maintained list of owner names assigned to a group, including affiliations cited from published reporting
Group names come from the filings: a principal, an owner name the LLCs share, or a registered agent that is a company or is also a principal. A group is not named after an individual agent who is not a principal, or after a law firm or agent service, because a registered agent is often the owners' lawyer. A few names come from the reviewed list, including affiliations cited from published reporting. A group name is a label, not a statement that the named person or company owns the parcels.
Clustering uses a Union-Find algorithm. Connected components form ownership groups. Coverage: 399 groups covering 4,510 of 7,423 parcels (60.8%).
Interactive Map Parcel boundaries colored by ownership group
AI Chatbot Ask natural language questions about the data (powered by Claude)
Neighborhood Analysis 20 neighborhoods ranked by the share of corporate parcels linked to a group
Group Profiles Short descriptions of 80+ groups, based on business filings
Network Graphs Visualize links between owner entities
Property Type Filters Residential, commercial, condo, institutional
Comparison Table Sort all 399 groups by value, count, entities
Printable Reports Per-group reports with full property listings
CSV Export Full dataset downloadable for analysis
Guided Tour Short product walkthrough, plus a separate key findings briefing
VGSI (gis.vgsi.com/newhavenct): Property owners, assessments, sale history, zoning and use codes.
CT Secretary of State: Business entity filings, including available agents, principals and formation dates.
Connecticut State Parcel Layer (2023): Parcel boundaries, matched by assessor account. New Haven GIS: Neighborhood boundaries.
Some corporate parcel records have no unique match to an exact assessor-account polygon in the stored parcel layer. Those records are kept out of the map rather than placed at a guessed location. The published reports below identify them by parcel ID (PID).
Address search keeps one record per normalized street address. Multiple assessor accounts can share that address, so some unmapped PIDs do not have separate search results. Use the individual assessor links below to inspect each record.
The list loads when opened.
The AI assistant queries the saved property dataset. It does not perform live assessor lookups or fresh web research.
Elm City Explorer is owned and operated by Navigator Technologies LLC.
The data pipeline (scrape → cluster → map) generalizes to any city with public assessor and secretary-of-state data. We're starting with New Haven and planning to expand to Hartford, Bridgeport, Providence, and Boston.
This is a research tool, not a definitive ownership registry. Some connections may be spurious. Some owners may be missing if they don't file with CT SOS. Recorded prices of $0 or nominal amounts do not establish the purpose of a transfer. Counts are parcel records, not housing units.
Snapshot refresh date is loading.
Current and previously mapped corporate parcel owners, assessments and deed histories are scheduled for a weekly check; the date above is the last completed refresh. Street discovery rotates over 28 days. Individual-owner records are not all checked weekly. Business filings are looked up for newly eligible owners with five or more properties and retried after failures; existing filings are not all reverified weekly. Parcel geometry is not refreshed weekly.