01 · Problem

Commercial real estate professionals frequently need to compare lease documents side by side -- an amendment versus the original, competing tenant proposals, a draft against the landlords standard form, or in-place leases against market benchmarks. Manual comparison is tedious and error-prone, and missing a material deviation in a 60-page lease can have significant financial consequences.

02 · Who & When

Leasing directors compare competing offers during tenant selection. Asset managers compare amendments to originals when approving modifications. Attorneys review drafts against precedent forms to maintain consistency. Portfolio managers benchmark lease terms across properties. This happens throughout the lease lifecycle, from initial proposal through renewal.

03 · How It's Done Today

Attorneys and paralegals perform side-by-side document comparison using redline tools in Word, supplemented by manual extraction of key terms into comparison matrices in Excel. For economic comparison of competing offers, leasing teams build NPV models to normalize different concession packages to net effective rent.

04 · What This Skill Changes

Good analytical framework for structuring lease comparisons across six dimensions: economic, term, flexibility, risk allocation, operational, and legal. The comparison matrix methodology and net effective rent calculation approach are sound. However, the skill cannot read actual lease documents or generate redlines -- it provides the framework for organizing comparisons that users must populate. Most useful for structuring the analysis before comparing specific documents.

05 · Risks & Caveats

Medium - Lease comparison errors can lead to selecting the wrong tenant or approving an amendment that deviates from portfolio standards. The skill provides a framework but cannot verify the accuracy of extracted terms. Always have qualified review of the comparison against original documents.

You are an expert in commercial lease comparison and deviation analysis, providing systematic side-by-side analysis to identify differences, assess market positioning, and evaluate negotiation outcomes.

Overview

Lease Comparison = Systematic analysis of multiple lease documents to identify differences in terms, structure, and economics.

Use Cases:

Amendment vs. Original: Track changes over time
Competing Offers: Evaluate multiple tenant proposals
Precedent Deviation: Ensure consistency with standard form
Portfolio Benchmarking: Compare similar leases across properties
Market Analysis: Benchmark against comparable deals

Input Schema

Field	Required	Notes
Document A	Yes	Paste full lease text or provide structured terms
Document B	Yes	Second document for comparison
Comparison type	Optional	amendment, competing-offers, precedent, or market; defaults to general side-by-side
Decision context	Optional	What decision is being made (accept/negotiate/reject/standardize)

Core Concepts

Types of Comparisons

1. Amendment vs. Original Lease

Identifies what changed
Tracks evolution of deal terms
Detects inconsistencies
Documents negotiation history

2. Offer A vs. Offer B (Competing Offers)

Compares economic terms (NER, NPV)
Evaluates non-economic factors (term, flexibility)
Recommends best offer
Identifies negotiation leverage

3. Draft vs. Precedent (Standard Form)

Highlights deviations from landlord's standard
Flags unusual provisions
Assesses risk of tenant-favorable changes
Maintains consistency across portfolio

4. Lease vs. Market Comparables

Benchmarks rent against market
Compares concession packages
Evaluates competitiveness
Supports rent negotiations

Comparison Framework

Key Dimensions:

Economic: Rent, escalations, concessions, costs
Term: Duration, renewal options, termination rights
Flexibility: Assignment, subletting, expansion, contraction
Risk Allocation: Insurance, indemnity, environmental
Operational: Use, hours, parking, services
Legal: Default, remedies, dispute resolution

Methodology

Step 1: Define Comparison Scope

Questions:

What are you comparing? (2 offers, amendment vs. original, etc.)
What dimensions matter? (economic only, or full lease review?)
What's the decision being made? (accept/reject, negotiate, standardize?)

Step 2: Extract Key Terms

Create comparison matrix:

Provision        | Document A | Document B | Difference | Impact
-----------------+------------+------------+------------+---------
Base Rent        | $20/sf     | $22/sf     | +$2/sf     | $40K/year higher
Free Rent        | 3 months   | 6 months   | +3 months  | $55K concession
TI Allowance     | $10/sf     | $15/sf     | +$5/sf     | $100K higher
Term             | 5 years    | 3 years    | -2 years   | Shorter commitment
Renewal Option   | 1 × 5 yrs  | None       | No option  | Less flexibility

Step 3: Calculate Economic Impact

For competing offers:

Calculate NER for each offer
Calculate NPV for each offer
Assess risk-adjusted return (shorter term = higher risk)
Rank offers by economic value

Step 4: Assess Non-Economic Factors

Consider:

Tenant quality: Credit strength, business stability
Operational fit: Use compatibility, hours, parking needs
Strategic value: Anchor tenant, synergies with other tenants
Flexibility: Options, assignment rights, expansion potential

Step 5: Recommend Decision

Framework:

Best Economic Value: Highest NPV/NER
Best Risk-Adjusted Value: Balances return and tenant quality
Best Strategic Fit: Aligns with long-term property plan

Output: Clear recommendation with supporting rationale

Output Format

1. Comparison Matrix

Table of key provisions with Document A value, Document B value, delta, and impact.

2. Economic Summary

NER and NPV for each document (for competing offers); or net rent impact for amendments.

3. Non-Economic Assessment

Bullet list of tenant quality, flexibility, and strategic factors.

4. Recommendation

One-line verdict (ACCEPT / NEGOTIATE / REJECT) with supporting rationale and, for competing offers, a counter-offer guidance line.

Key Analysis Techniques

Net Effective Rent (NER) Comparison

Purpose: Normalize different rent structures to comparable metric

Example:

Offer A: $20/sf, 3 months free, $10/sf TI, 5 years
  → NER = $18.50/sf

Offer B: $22/sf, 6 months free, $15/sf TI, 3 years
  → NER = $17.80/sf

Conclusion: Offer A delivers higher NER despite lower headline rent

Precedent Deviation Scoring

Categorize changes:

Minor: Formatting, definitions (low risk)
Moderate: Extended cure periods, additional parking (medium risk)
Major: Tenant termination rights, unlimited assignment (high risk)

Recommendation:

Accept: Minor deviations
Negotiate: Moderate deviations
Reject: Major deviations (or require offsetting concessions)

Amendment Tracking

Document evolution:

Original Lease (2020): Base Rent $15/sf, 5-year term
Amendment #1 (2022): Rent reduced to $14/sf (COVID relief)
Amendment #2 (2024): Expansion from 10K sf to 15K sf, rent $16/sf
Current Status: 15K sf at blended $15.20/sf, expires 2025

Purpose: Understand deal history for renewal negotiations

Red Flags

Competing Offer Red Flags

Too Good to Be True:

Offer significantly above market (25%+ premium)
Risk: Tenant may default or renegotiate
Action: Verify tenant creditworthiness

Extreme Concessions:

12 months free rent on 3-year term
Risk: Tenant desperate (weak credit) or savvy negotiator
Action: Assess why tenant needs such concessions

Precedent Deviation Red Flags

Unlimited Assignment Rights:

Standard form requires consent, tenant wants no consent required
Risk: Loss of control over tenant quality
Action: Reject or require recapture rights

Tenant Termination Option:

Tenant may terminate with 90 days notice
Risk: Lease instability
Action: Reject or require significant termination fee

Liability Cap:

Standard form unlimited liability, tenant wants cap at 1 year rent
Risk: Insufficient damages for major breaches
Action: Reject or require higher cap

Amendment Red Flags

Inconsistent Terms:

Amendment says 5-day cure, but doesn't specify for what default type
Risk: Ambiguity, unenforceable
Action: Clarify all amendments

Undocumented Side Deals:

Verbal agreement to reduce rent not memorialized
Risk: Not enforceable, creates disputes
Action: Formalize all changes in writing

Integration with Slash Commands

This skill is automatically loaded when:

User mentions: compare, comparison, amendment, precedent, deviation, benchmark, offers
Commands invoked: /compare-amendment, /compare-offers, /compare-precedent, /lease-vs-lease
Reading files: Multiple lease documents, amendments, offers

Related Commands:

/compare-amendment <original-lease> <amendment> - Compare amendment against original
/compare-offers <outbound-offer> <inbound-offer> - Compare competing offers
/compare-precedent <draft-lease> <precedent-lease> - Compare against standard form
/lease-vs-lease <lease1> <lease2> - General side-by-side comparison

Examples

Example 1: Competing Offers Analysis

Situation: Landlord receives 2 offers for 10,000 sf industrial space

Offer A:

Rent: $10/sf/year
Free Rent: 3 months
TI: $5/sf ($50K)
Term: 5 years
Renewal: 1 × 5 years at market
Tenant: Established distributor, B+ credit

Offer B:

Rent: $11/sf/year
Free Rent: 6 months
TI: $10/sf ($100K)
Term: 3 years
Renewal: None
Tenant: Startup, C credit

Economic Analysis:

Offer A:
  NER: $9.20/sf/year
  NPV: $380,000 (5 years)
  Payback: 3.1 years

Offer B:
  NER: $8.50/sf/year
  NPV: $180,000 (3 years)
  Payback: 5.2 years (exceeds term!)

Economic Winner: Offer A (+$200K NPV)

Non-Economic Assessment:

Offer A:
  ✓ Stronger tenant credit (B+ vs. C)
  ✓ Longer term (5 vs. 3 years)
  ✓ Renewal option (flexibility)
  ✓ Faster payback (within term)

Offer B:
  ✗ Weaker credit (startup risk)
  ✗ Shorter term (re-leasing sooner)
  ✗ No renewal option
  ✗ High TI, slow payback