AnalyticsCompStak

Lease Abstraction for CompStak

By Angel Campa, Founder · Updated March 2026

About CompStak

CompStak is a commercial real estate data platform providing lease comparable data, market analytics, and property intelligence. It is used by brokers, asset managers, and analysts to benchmark in-place rents against market comparables, track lease trends, and support investment decisions. CompStak's comparable lease data is most valuable when paired with accurate in-place lease data from your own portfolio — the comparison reveals which leases are above market, below market, or at risk of non-renewal.

How Lextract Helps

Lextract extracts the in-place lease economics that you compare against CompStak market data: current base rent, rent per square foot, lease expiration, and renewal option terms. By running your portfolio leases through Lextract, you build the structured dataset needed to benchmark every tenant against current market conditions. This analysis drives renewal strategy, pricing decisions, and asset valuation.

Workflow: Extract to Import

1Extract all portfolio leases through Lextract to build a structured in-place rent roll
2Export to Excel with base rent, rent per square foot, expiration date, and renewal option terms
3Pull comparable lease data from CompStak for the same submarkets and property types
4Build a side-by-side comparison of in-place rents versus CompStak market comps
5Flag below-market leases as renewal opportunities and above-market leases as vacancy risk
6Use the analysis for investor reporting, lease renewal negotiations, and acquisition pricing

Supported Export Formats

Lextract provides the following export formats compatible with CompStak:

ExcelCSVJSON

Critical Fields for CompStak

These are the highest-priority fields Lextract extracts for CompStak users:

Base Rent Rentable Area Commencement Date Expiration Date Renewal Options Lease Type

Frequently Asked Questions

How does pairing Lextract with CompStak improve investment analysis?

CompStak shows what the market is paying for similar space. Lextract shows what your tenants are actually paying under their executed leases. The combination reveals the spread between in-place rent and market rent — a key input for modeling lease renewal probability, setting asking rents for vacant spaces, and underwriting the reversion value of expiring leases.