The Complete Guide to AI Lease Extraction: From PDF to Structured Data
How AI lease extraction works, why commercial leases are harder than other documents, accuracy benchmarks by lease type, and a build-vs-buy framework for CRE teams.
Lextract extracted 126 fields from a 3-amendment lease chain with landlord assignment: reconciling superseding provisions across 4 documents into a single coherent record.
By Angel Campa, Founder · Updated March 2026
Location
Salt Lake City, UT
Size
28,000 RSF
Annual Rent
$756K/yr
Term
48 months
Tenant
Extend Health
Landlord
Kilroy Realty
This file contains three consecutive amendments plus a landlord assignment document. Extracting the current lease terms requires reconciling changes across four documents, with each amendment superseding portions of the prior agreement. The landlord was also assigned (from original owner to Kilroy Realty), requiring verification that all lease obligations transferred correctly.
Lextract processed all four documents, identified the amendment chain sequence, applied the most recent superseding provisions to each field, and correctly reflected the Kilroy Realty assignment as the current landlord entity. The extraction produced a single coherent 126-field record representing the current lease state.
126
Fields Extracted
5-15 minutes
Extraction Time
| Field | Extracted Value | Why It Matters |
|---|---|---|
| Document Type | 3rd Amendment + Landlord Assignment | Multi-document chain requires reconciliation across 4 documents |
| Current Landlord | Kilroy Realty LP | Landlord changed via assignment — must match current notice requirements |
| Effective RSF | 28,000 RSF | Final RSF after 3 amendments (original was 21,000 RSF) |
| Annual Base Rent | $756,000 | $27/RSF modified gross — reflects amendment-history pricing |
| Expiration Date | December 31, 2025 | Short remaining term — near-term renewal decision required |
| Outstanding TI Balance | $0 | All TI fully disbursed across prior amendments |
Lextract processes all documents in sequence, identifies amendment numbers (First, Second, Third, etc.), and applies each amendment's provisions as overrides to the prior document. The final extraction represents the current lease state as if all documents were a single current agreement.
Lextract extracts both the original landlord (from the original lease) and the assignee landlord (from the assignment document). The current landlord field reflects the most recent assignee, and the original landlord is preserved in the notes field.
How AI lease extraction works, why commercial leases are harder than other documents, accuracy benchmarks by lease type, and a build-vs-buy framework for CRE teams.
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