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Lease Abstraction Software & Document AI

AI lease abstraction for landlords, occupiers and investors — key terms, dates and obligations extracted from leases and property documents, each linked to its source clause and checked by a person.

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Lease Abstraction Architecture Ecosystem
Clause extractionCritical datesAmendment reconciliation
Source linkingHuman review

TRUSTED BY TEAMS

letest.ai
Propmodel
aloomah
yeeld
Nostromarkets
Pharmy
/// INTRODUCTION

A lease abstract is a short summary of a lease’s key terms: parties, term, rent, escalations, options, obligations and critical dates. Lease abstraction is the work of producing one, and it is usually done by someone reading every lease by hand.

Sodio builds AI lease abstraction software that reads leases and other property documents, extracts their terms into structured data, links every value to the clause it came from, and sends anything uncertain to a person — so the result can be trusted, not just produced quickly.

AI lease document abstraction audit

/// IS CUSTOM RIGHT FOR YOU?

A Service, a Tool, or Your Own System or Your Own System

Lease abstraction services — teams that abstract leases for you — and packaged AI abstraction tools both exist, and for many portfolios one of them is the right answer.

Use a service or a packaged tool when

  • You have a fixed backlog to abstract once
  • A standard abstract template suits you
  • The output only needs to live in a spreadsheet
  • Leases are the only documents involved

Build your own when

  • New leases, acquisitions and amendments arrive all year
  • Your abstract has fields and definitions specific to your business
  • Extracted data has to flow into your lease, portfolio or accounting systems
  • Rent rolls, offering memoranda, estoppels and invoices need reading too

/// WHAT THE SYSTEM COVERS

What Lease Abstraction Software Covers

Document intake

Document intake

Your abstract template

Your abstract template

Clause extraction

Clause extraction

Critical date calculation

Critical date calculation

Amendment reconciliation

Amendment reconciliation

Source linking

Source linking

Confidence and review

Confidence and review

Portfolio questions

Portfolio questions

Export and integration

Export and integration

Beyond leases

Beyond leases

/// DOCUMENTS

Documents It Reads

Leases, amendments and side letters
What is extractedParties, term, rent, escalations, options, obligations, critical dates
Used byLandlords, occupiers, investors
Rent rolls
What is extractedTenants, units, rents, lease dates and arrears
Used byInvestors and asset managers
Offering memoranda
What is extractedProperty facts, income, expenses and assumptions for underwriting
Used byAcquisition teams
Estoppel certificates
What is extractedWhat each tenant confirms about their lease, checked against the abstract
Used byBuyers and lenders
Purchase agreements
What is extractedParties, price, deadlines and conditions
Used byBrokerages and transaction coordinators
Service charge and CAM invoices
What is extractedCharges compared with what the lease permits
Used byOccupiers and property managers

/// HOW A LEASE BECOMES DATA

How a Lease Becomes Data

STAGE 1 - UPLOAD

Documents arrive, in any format

Pages read, including scans, and sorted by document type

STAGE 2 - READ

The text is structured

Sections, clauses and defined terms identified

STAGE 3 - EXTRACT

Fields are filled in

Each value extracted with its source clause and a confidence score

STAGE 4 - RECONCILE

Amendments are applied

Original lease, amendments and side letters combined into current terms

STAGE 5 - REVIEW

A person checks

Uncertain and high-value fields reviewed; corrections recorded

STAGE 6 - PUBLISH

The abstract goes live

Data passed to your systems and critical date alerts set

/// WHERE EXTRACTION GOES WRONG

Where Extraction Goes Wrong — and How It Is Caught

Most lease abstraction errors come from a handful of predictable places. These are designed for, not discovered later.

Amendments override the lease
Why it happensTerms were changed years later in a separate document
How it is handledDocuments read together in date order; current terms shown with their history
Dates stated relatively
Why it happens"Five years from the rent commencement date"
How it is handledThe date calculated from its anchor and shown with the working
Poor scans and handwriting
Why it happensOld leases, faxed pages and handwritten changes
How it is handledEach value scored for confidence; low scores sent to review
Defined terms
Why it happensA word's meaning is set elsewhere in the lease
How it is handledDefinitions resolved across the whole document
Ambiguous drafting
Why it happensClauses a lawyer would argue about
How it is handledFlagged for a person — never guessed
Missing documents
Why it happensA side letter nobody uploaded
How it is handledGaps flagged when a clause refers to a document not in the file

/// ACCURACY

How Accurate Is AI Lease Abstraction?

Accuracy is not one number. It depends on the field, the document and the quality of the scan, which is why it is measured on your own leases before anything goes live — compared field by field with abstracts your team already trusts.

Straightforward
ExamplesParties, premises, start and end dates, base rent
Typical reliabilityHigh on clean documents
Calculated
ExamplesRelative dates, escalated rents, notice deadlines
Typical reliabilityGood, with the working shown
Interpretive
ExamplesComplex obligations, reinstatement, unusual options
Typical reliabilityAlways reviewed by a person

/// COMPARE

Manual Abstraction, Automated Tool or Custom Document AI

Speed
Manual abstraction serviceDays to weeks per batch
Automated lease abstraction toolMinutes per lease
Custom document AIMinutes per lease
Cost
Manual abstraction servicePer lease, every time
Automated lease abstraction toolSubscription
Custom document AIBuild cost, then you own it
Your template
Manual abstraction serviceYes, by instruction
Automated lease abstraction toolThe tool's fields
Custom document AIBuilt to yours
Checking the result
Manual abstraction serviceTrust the reviewer
Automated lease abstraction toolVaries by tool
Custom document AIEvery value linked to its clause
Where the data goes
Manual abstraction serviceA spreadsheet
Automated lease abstraction toolThe tool, then exported
Custom document AIStraight into your systems
Best for
Manual abstraction serviceA one-off backlog
Automated lease abstraction toolStandard leases, standard output
Custom document AIOngoing volume and connected systems

/// COST AND TIMELINE

What Drives the Cost and Timeline

A pilot on a sample of your own leases, measured against your existing abstracts, typically runs within 30 days. If it meets the accuracy you need, a production system follows within 90.

30 daysPilot on a sample of your own leases
90 daysProduction system

The cost moves with six things: how many documents and how long they are; the quality of the scans; how detailed your abstract template is; which document types beyond leases are included; the review workflow; and the systems the abstracts must flow into.

/// FAQ

Frequently Asked Questions

A lease abstract is a short summary of a lease's key terms — usually one to three pages — covering the parties, the premises, the term, rent and escalations, options such as breaks and renewals, obligations, and the critical dates. It exists so that nobody has to reread a sixty-page lease to answer a simple question. Lease abstraction is the work of producing one, and lease abstraction software is what automates it.

It depends on the field and the document. Parties, dates and rent are extracted reliably from a clean lease; complex obligations and heavily amended leases are harder. That is why accuracy is measured on a sample of your own leases against abstracts your team trusts, field by field, before anything goes live — and why uncertain values go to a person rather than being saved.

Yes, and it is where most abstraction errors come from. The system reads the original lease together with every amendment and side letter in date order, so the abstract shows the terms that apply now, with a history of how each one changed. If a lease refers to a document that is missing from the file, that gap is flagged.

They are read with text recognition, and each value is scored for confidence. Faint scans, handwritten changes and faxed pages usually score lower, and those values are sent for review rather than trusted. Very poor copies are flagged so the original can be found.

Yes, as part of a project. For a one-off backlog — a system migration, an acquisition, a portfolio review — we can run the AI-assisted abstraction with your team reviewing the results, rather than you building a process for work you do only once. For ongoing volume, the software stays with you.

Yes. Models are hosted so your documents are not used to train anyone else's, access follows the same permissions as your other systems, and documents and abstracts are stored under the data protection rules that apply to you.

/// RELATED SERVICES

Related Industries and Services

Routes where scope overlaps with real estate software.

/// GET STARTED

Start With Your Hardest Leases

Tell us how many leases and documents you hold, and share a sample — including the heavily amended and badly scanned ones. We will assess, free, what can be extracted reliably, where a person still needs to look, and what a system would take.

Contact Us