| name | lease-comparison-expert |
| description | Use when comparing a lease amendment to its original, evaluating competing inbound vs. outbound offers, benchmarking a draft against a standard precedent form, or producing a side-by-side deviation analysis to support a deal recommendation. |
Lease Comparison Expert
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
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
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
Activation
This skill is automatically loaded when:
- User mentions: compare, comparison, amendment, precedent, deviation, benchmark, offers
- Reading files: Multiple lease documents, amendments, offers
All lease comparison workflows (amendment vs. original, competing offers, draft vs. precedent, general side-by-side) are handled directly by this skill — just ask in natural language.
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
Recommendation:
ACCEPT OFFER A
Rationale:
- Superior economics ($200K higher NPV)
- Stronger tenant credit
- Longer term reduces re-leasing risk
- Renewal option provides stability
- TI payback within term
Counter-Offer B: Would need $12.50/sf to match Offer A economics
Example 2: Amendment vs. Original - Tracking Changes
Original Lease (2020):
- Rent: $18/sf
- Term: 10 years (2020-2030)
- Use: General office
- Assignment: Landlord consent required
Amendment #1 (2022) - COVID Relief:
- Rent: Reduced to $15/sf for Years 3-4 (2022-2024)
- Years 5-10: Return to $18/sf
- Free Rent: 3 months (retroactive relief)
Amendment #2 (2024) - Expansion:
- Area: Increased from 5,000 sf to 7,500 sf
- Rent: New space at $20/sf (blended $18.67/sf)
- Term: Extended 2 years (now expires 2032)
- TI: $15/sf for new space ($37,500)
Current Status Summary:
LEASE EVOLUTION SUMMARY
Original Deal (2020):
- 5,000 sf @ $18/sf
- 10-year term
- Total rent over term: $900K
After Amendments (2024):
- 7,500 sf @ blended $18.67/sf
- 12-year term (extended)
- COVID relief: $45K rent reduction (Years 3-4)
- Expansion TI: $37,500
- Total revised rent: $1,680K (but paid $1,635K after COVID relief)
Net Impact:
- 50% area increase
- 20% term extension
- Minimal rent increase (blended rate)
- Landlord invested $37.5K TI for expansion
- Tenant remains through 2032 (positive)
Assessment: Favorable expansion - retains tenant, adds revenue, modest TI investment
Workflow: Precedent Comparison
Invocation: Ask in natural language, e.g. "Compare this draft lease against our standard precedent form."
Input Handling
- First argument: current draft lease being negotiated
- Second argument: your organization's standard form/precedent lease
- Determine perspective (Landlord or Tenant) and whose form the precedent is
Change Classification
For each section:
- Identical ✓ — Matches precedent exactly
- Modified ⚠️ — Language changed
- Deleted ❌ — Section removed entirely
- Added ⊕ — New section not in precedent
- Moved ↔️ — Section relocated
- Weakened ⬇️ — Protective language diluted
- Strengthened ⬆️ — Language made more favorable to you
Protective Provisions Status Table
If Landlord Form:
| Protection | Status | Issue | Recommendation |
|---|
| Subordination Rights | ✓/⚠️/✗ | | |
| Broad Default Definition | ✓/⚠️/✗ | | |
| Holdover Penalty (150-200%) | ✓/⚠️/✗ | | |
| Tenant Indemnification | ✓/⚠️/✗ | | |
| Landlord Exculpation | ✓/⚠️/✗ | | |
| No Rental Abatement Except as Expressed | ✓/⚠️/✗ | | |
| Personal Guaranty Requirements | ✓/⚠️/✗ | | |
If Tenant Form:
| Protection | Status | Issue | Recommendation |
|---|
| Quiet Enjoyment | ✓/⚠️/✗ | | |
| Non-Disturbance from Lender | ✓/⚠️/✗ | | |
| Rent Abatement Rights | ✓/⚠️/✗ | | |
| Op Cost Audit Rights | ✓/⚠️/✗ | | |
| Assignment for Affiliates (no consent) | ✓/⚠️/✗ | | |
| Cap on Operating Cost Increases | ✓/⚠️/✗ | | |
| Reasonable Consent Standards | ✓/⚠️/✗ | | |
Deviation Tiering
Tier 1 — Must Fix (Deal-Breakers) 🔴
- Fundamental changes eliminating key protections
- Material shifts in risk allocation
- Missing critical provisions
Tier 2 — Should Fix (Strong Push) 🟡
- Important protections weakened but not eliminated
- Missing desirable provisions
- Ambiguous language replacing clear terms
Tier 3 — Can Accept 🟢
- Reasonable deal-specific changes
- Market-standard deviations
- Stylistic preferences
Tiered Negotiation Strategy
- Opening: Lead with Tier 1 items, frame as non-negotiable corrections to standard protections
- Follow-up: Address Tier 2, prioritize by deal specifics, be prepared to trade
- Final: Concede Tier 3 if needed as goodwill
- Package deals: "We'll accept [their Tier 2 change] if you restore [our Tier 2 provision]"
Precedent Evolution Recommendations
After completing review, flag if any of the draft's changes represent market evolution worth adopting into your standard form. Distinguish:
- Reasonable market evolution — Worth updating precedent
- One-party advocacy — Reject and maintain current form
Common Sources of Deviation
- Other Party's Form — Consider requesting they start over with your form
- Prior Deal Markup — Identify deal-specific vs. form provisions that carried over
- Intentional Negotiation — Expected; focus on restoring critical protections
- Drafting Errors — Point out politely as corrections
Red Flags
- Wholesale changes to Remedies section (weakening enforcement rights)
- Subtle definition changes (can alter entire deal economics)
- Missing entire protective sections (likely intentional)
- New vague terms ("reasonable", "material", "substantial") without definition
- Changed cross-references (may break logical connections)
Output Naming
Save report to Reports/YYYY-MM-DD_HHMMSS_precedent_comparison_[property].md
Workflow: Offer Comparison
Invocation: Ask in natural language, e.g. "Compare the inbound offer to our outbound offer."
Input Handling
- First argument: path to the inbound offer (received from the other party)
- Second argument: path to your outbound offer (what you sent)
- Determine perspective (Landlord or Tenant) from file names, headers, or document content
Movement Classification
For each term, classify movement:
- Accepted ✓ — Their offer matches your position
- Rejected ✗ — Explicitly rejected or ignored
- Countered ⟷ — Different value/approach proposed
- Partially Accepted ◐ — Moved toward you but not all the way
- New Issue ⊕ — Raised something not in your outbound offer
- Withdrawn ⊖ — Something in your outbound not in their inbound
Scorecard Table
| Category | Terms Changed | You Won | They Won | Compromised | New Issues | Still Open |
|---|
| Financial | | | | | | |
| Term & Renewal | | | | | | |
| Flexibility | | | | | | |
| Risk Allocation | | | | | | |
| TOTALS | | | | | | |
Deal-Breakers vs. Trading Chips
Classify each open issue:
- Deal-Breakers 🔴 — Both parties far apart, fundamental economics
- Trading Chips 🔄 — Stated positions but flexible; tradeable for bigger wins
- Quick Wins ✓ — Positions very close; capture to build momentum
Negotiation Tactics to Watch For
- Salami Tactics — Tiny concessions on many fronts to appear reasonable
- Counter: Focus on key issues, don't get distracted by minor movement
- Anchoring — Extreme opening to make real target seem reasonable
- Counter: Re-anchor with market standards and comparables
- Good Cop/Bad Cop — Different team members take conflicting positions
- Counter: Stay focused on offer terms, not personalities
- Deadline Pressure — Artificial deadlines forcing concessions
- Counter: Set timeline based on real constraints
- Nibbling — After major issues resolved, asking for "one more small thing"
- Counter: Be clear about what's final, resist reopening settled issues
Reading Between the Lines
- Quick turnaround = High interest or pressure on them
- Slow turnaround = Less interest, shopping other deals, or internal approval issues
- Accepting most financial terms = They need the space, financial terms less critical
- Fighting flexibility clauses = They want a locked-in tenant/landlord
- Adding complexity = They want negotiation leverage
Pre-Counteroffer Checklist
Content Verification:
Strategic Verification:
Output Naming
Save report to Reports/YYYY-MM-DD_HHMMSS_offer_comparison_[property]_round[N].md
Workflow: Amendment Comparison
Invocation: Ask in natural language, e.g. "Compare this new amendment against the lease history folder."
Input Handling
- First argument: path to the new amendment file
- Second argument: path to folder containing original lease + previous amendments
- If only one argument provided, prompt user for missing path
Step 1: Load Lease History
- Original lease: look for
lease.pdf, lease.docx, original_lease.*
- Previous amendments:
amendment*.pdf, amending*.pdf, *amendment*.md — sort chronologically
- Convert to markdown via
markitdown if needed
Step 2: Recitals Verification (CRITICAL)
Before substantive analysis, verify recitals in the new amendment:
| Recital Element | Stated in Amendment | Actual (from History) | Match? | Issue |
|---|
| Original Lease Date | [Date from recitals] | [Date from file] | ✓/✗ | |
| Landlord Name | [Name from recitals] | [Name from original] | ✓/✗ | |
| Tenant Name | [Name from recitals] | [Name from original] | ✓/✗ | |
| Property Address | [Address from recitals] | [Address from original] | ✓/✗ | |
| Amendment 1 Date | [Date from recitals] | [Date from file] | ✓/✗ | |
| Amendment Number | [Number from recitals] | [Actual sequence] | ✓/✗ | |
| Stated Purpose | [What recitals say] | [What amendment does] | ✓/✗ | |
Flag all discrepancies prominently. Common recital errors:
- Missing Amendments — Amendment 3 recites 1 and 2 but a 2A exists
- Wrong Dates — Recitals state June 15, 2018 but actual amendment is 2017
- Wrong Party Names — "ABC Corp." in lease vs. "ABC Corporation" in recitals
- Outdated Party Names — Tenant was assigned but recitals still name original tenant
- Wrong Amendment Numbers — Calls it "Third Amendment" but it's actually the fourth
- Purpose Mismatch — Recitals say "to extend the term" but amendment also changes rent
- Copy/Paste Errors — Recitals reference a completely different property from a template
Step 3: Build Current Lease State
Apply each previous amendment in chronological order to establish the state before the new amendment. Track sections amended multiple times.
Step 4: Section-by-Section Analysis
For each modified section, capture:
- Current text (before amendment)
- New text (after amendment)
- Amendment history for sections changed multiple times
- Impact: Financial / Term / Rights / Obligations / Use / Critical Dates
Step 5: Report Structure
# LEASE AMENDMENT COMPARISON REPORT
## [Property Address]
## Executive Summary
## Amendment Information (number, dates, parties, previous amendments)
## Recitals Verification [table above]
## ⚠️ Recital Issues Identified
## Lease History Timeline [table]
## Summary of Changes (What's Changed / Added / Deleted)
## Detailed Change Analysis [per-section: current → new → impact]
## Critical Changes Summary (🔴 High / 🟡 Medium / 🟢 Low)
## Issues and Concerns (conflicts, ambiguities, missing elements)
## Financial Impact Summary [table]
## Updated Critical Dates
## Recommendations (For Landlord / For Tenant / For Both)
## Checklist Before Execution
Pre-Execution Checklist
Recitals:
Substantive Provisions:
Output Naming
Save report to Reports/YYYY-MM-DD_HHMMSS_amendment_comparison_[property].md
Skill Version: 1.0
Last Updated: November 13, 2025
Related Skills: commercial-lease-expert, effective-rent-analyzer, negotiation-expert, offer-to-lease-expert
Related Commands: none — amendment, offer, precedent, lease-vs-lease, and market-comparison workflows are all handled by this skill directly
