AI Lease Abstraction Accuracy: Benchmarks and What to Expect
What accuracy can you realistically expect from AI lease abstraction tools? We break down field-level accuracy rates, where AI excels, where it struggles, and how to validate output.
Indicates if landlord approval is necessary for a transfer of the leasehold.
Also known as: Permission to Assign
By Angel Campa, Founder · Updated March 2026
If consent is required for assignment or subletting, the tenant cannot exit the lease by finding a replacement without landlord approval. This limits flexibility for corporate restructurings, M&A transactions, and subleasing excess space. A consent requirement without a "shall not be unreasonably withheld" standard gives the landlord effective veto power over any transfer, trapping the tenant in the lease regardless of circumstances.
Found in the "Assignment and Subletting" section. The first sentence typically states whether consent is required. The standard of consent and any exceptions follow in subsequent paragraphs.
Lextract uses a combination of AWS Textract OCR and Claude AI to identify and extract the consent required from your lease PDF. The AI searches for the field name and common aliases like "Permission to Assign" across all pages of the document, then assigns a confidence score based on OCR quality and extraction certainty. Fields with lower confidence are flagged for human review.
Consent Standard
The legal standard governing the landlord's right to refuse a transfer request.
Profit Sharing %
The portion of sublease profits payable to the landlord.
Recapture Right
The landlord's right to terminate the lease and take back the space upon a transfer request.
Permitted Transferees
Exemptions allowing corporate restructurings or M&A without landlord consent.
Continuing Liability
Indicates if the original tenant remains financially liable post-assignment.
Only if the lease explicitly permits it, which is rare. Most commercial leases require prior written consent. However, well-negotiated leases include exceptions for "permitted transfers" like corporate restructurings, parent-subsidiary transfers, and mergers where the surviving entity has equal or greater creditworthiness.
An unauthorized assignment is typically a material default that can trigger lease termination, acceleration of rent, and damages. Even if the new occupant is creditworthy, the lack of consent gives the landlord grounds to terminate.
What accuracy can you realistically expect from AI lease abstraction tools? We break down field-level accuracy rates, where AI excels, where it struggles, and how to validate output.
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