AnalysisMicrosoft Excel

CoStar + Lease Comparison

By Angel Campa, Founder · Updated March 2026 · Saves 2–3 hours per property for market analysis

The Problem

Asset managers need to compare their in-place rents against CoStar asking rents to identify below-market and above-market leases for hold/sell and renewal strategy. Without structured extraction of in-place lease data, this comparison requires manual reading of every lease.

Step-by-Step Workflow

  1. 1
    Pull CoStar asking rent dataSource

    Download CoStar asking rent data for comparable properties and lease spaces in the submarket. Export to Excel.

  2. 2
    Upload in-place lease PDFs to LextractLextract

    Upload all executed tenant lease PDFs to Lextract for structured extraction.

  3. 3
    Extract in-place rent and lease structureLextract

    Lextract extracts base rent per SF, lease type, lease expiration, and escalation schedule for each tenant.

  4. 4
    Build rent gap analysis in ExcelDestination

    Combine in-place rents from Lextract with CoStar asking rates. Calculate the rent gap (spread to market) and rank tenants from most below-market to most above-market.

  5. 5
    Develop leasing and asset strategyDestination

    Use the rent gap analysis to prioritize lease renewals, identify re-leasing opportunities at market, and inform the hold/sell decision.

Who Uses This Workflow

Asset ManagersPortfolio ManagersBrokers

How Lextract integrates with Microsoft Excel

Learn about the full integration between Lextract and Microsoft Excel, including supported export formats and critical fields.

View Microsoft Excel integration →

Frequently Asked Questions

What is mark-to-market rent analysis?

Mark-to-market analysis compares your current in-place rents against current market asking rents. Tenants paying below market represent upside at renewal; tenants paying above market represent retention risk.

How does lease type affect the comparison?

Lextract identifies whether each lease is NNN, modified gross, or gross. This affects the effective economic rent comparison — a $25/SF NNN lease is not directly comparable to a $25/SF gross lease.

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Start the CoStar + Lease Comparison workflow

Upload your lease PDF and get 125+ structured fields ready to import into Microsoft Excel. Just $20 per lease — no subscription required.

Start Extracting — $20/lease