income-approach-expert Skill

Overview: Income Approach to Land Valuation

The income approach estimates land value by capitalizing the net operating income (NOI) that the land generates as a rental-producing asset. It is particularly applicable to:

Telecom sites (tower ground leases, carrier rental income)
Agricultural land (pasture / row crop rental income)
Ground leases (fee simple land under long-term commercial lease)
Easement lands (perpetual income from utility transmission rights)
Parking lots (surface parking income)
Land lease communities (mobile home parks, RV parks)

Fundamental formula:

Land Value = Net Operating Income ÷ Capitalization Rate

When to use direct capitalization vs. DCF

Direct cap (NOI ÷ Cap Rate): Stabilized, near-perpetual income (telecom, agricultural, parking). Default for this skill.
DCF: When the income stream is non-stabilized, term-limited, or has a material reversion (e.g., 25-year ground lease where fee holder regains possession). See the shopping-center walkthrough in worked-examples.md.
Sales comparison: Use as a reconciliation check when 3+ comparable income-producing sales exist.

Market Rent Analysis

The foundation of income approach valuation is determining defensible market rent for the land use.

Workflow

Identify 3-5 comparable rents in the same market and use class.
Adjust for material differences (term, escalation, renewal, maintenance responsibility).
Reconcile to a single market rent conclusion.
Document reasoning and supporting evidence.

Ideal comparable criteria: same use, same market (5-15 km), same lease type, within 12-18 months of valuation date, arm's length.

Common adjustment directions:

Shorter terms → higher rent (non-renewal risk)
Fixed escalations (2-3%) → 2-5% premium vs. flat
Commodity / CPI indexation → reduce base rate 5-10% (tenant absorbs less risk)
Favorable renewals → 3-7% lower base; uncertain renewals → 5-10% higher
Landlord-maintained → higher rent (landlord bears cost risk)

For detailed evidence sources, full comparable catalogs (telecom, agricultural), and worked adjustment examples, see comparable-rent-catalog.md.

Capitalization Rate Selection

The cap rate converts annual NOI to present value. Selection is the highest-leverage assumption in the analysis: a ±0.5% change typically moves value ±8-10%.

Three derivation methods

Method 1 — Market extraction (preferred when data exists)

Cap Rate = NOI ÷ Sale Price

Extract from 3+ recent arm's-length sales of comparable income-producing land. Reconcile to a single rate or tight range.

Method 2 — Band of investment (weighted cost of capital)

Cap Rate = (LTV% × Debt Yield) + (Equity% × Equity Yield)

Typical inputs: LTV 50-75%, debt yield 4-6%, equity yield 8-12%.

Method 3 — Build-up (risk-free rate plus premiums)

Cap Rate = Risk-Free Rate + Liquidity Premium + Inflation Premium + Business Risk

Each component must be justified by market evidence.

Documentation requirements

Extraction: Show extraction calculation for each of 3+ comps; reconcile to single rate.
Band of investment: Document LTV / debt yield / equity yield sources; show weighted calculation.
Build-up: Justify each premium with market evidence; compare result to extracted rates if available.
Sensitivity: Always show how ±0.5% cap rate variation affects value.

For comprehensive cap rate ranges by property type, agricultural rent levels by soil class, full band-of-investment and build-up worked components, see cap-rate-tables.md.

NOI Determination

Gross Rental Income     = Market rent × applicable unit
Less:  Vacancy / collection loss
Plus:  Other income (parking, utilities, equipment)
= Effective Gross Income
Less:  Operating expenses
        - Property taxes
        - Insurance
        - Maintenance and repairs
        - Management fees (typically 3-5% of GRI)
        - Utilities (if landlord-paid)
= Net Operating Income

Canonical Example: Telecom Ground Lease (Short Form)

Subject: Cellular tower ground lease, urban-fringe site, stabilized national-carrier tenant.

| Item | Value | |------|-------| | Market rent | $32,000/year | | Vacancy | 0% | | Property tax | $2,000 | | Insurance | $800 | | Maintenance | $1,200 | | Management fee (5% × $32,000) | $1,600 | | Total OpEx | $5,600 | | NOI | $26,400 | | Cap rate (extracted, 3 comps) | 6.0% | | Land value = $26,400 ÷ 0.060 | $440,000 |

Sensitivity at ±0.5% cap rate: $480,000 (5.5%) to $406,154 (6.5%). Conclude $440,000 with range $406K-$480K.

For full walkthroughs (telecom $35K-rent build, 80-acre Class 2 agricultural with sales reconciliation, 25-year shopping-center ground lease with reversion, perpetual easement, multi-variable scenarios), see worked-examples.md.

Application by Land Use Type

Telecom sites

Multi-decade leases with creditworthy carriers; stable income, limited tenant pool, carrier-built improvements, location specificity. Typical cap rates 5.5-7.0% (ground), 6.0-7.5% (rooftop), 7.0-8.5% (co-location).

Agricultural land

Commodity-exposed rent; annual / short-term leases; deep buyer pool; capital appreciation typically priced in (sales extraction yields 2-4% cap rates that under-state NOI yield). Use 4.0-6.0% cap rate for income approach on partially indexed rent; reconcile against sales.

Ground leases (fee under long-term lease)

Value the fee in two layers:

Fee Value = (Interim Rent ÷ Cap Rate) + (Reversion Value ÷ (1 + Cap Rate)^n)

Use a lower cap rate for the contractual interim stream and a higher discount rate for the long-dated reversion.

Easement lands

Capitalize the income-loss equivalent (or direct easement payment) at a low cap rate (4-5%) given perpetual nature and low risk.

For per-use cap rate ranges and rent benchmarks, see cap-rate-tables.md. For full per-use valuation walkthroughs, see worked-examples.md.

Reconciliation with Sales Comparison

Always cross-check the income approach against sales comparison when 3+ comps exist.

Income < Sales: Buyers expect capital appreciation beyond NOI (common for agricultural land); favor sales if well-supported.
Income > Sales: Market may under-price income potential, or sales reflect distressed / non-income attributes; investigate before concluding.

A blended conclusion (e.g., weighted average) is appropriate when both approaches yield credible but divergent results. See the agricultural reconciliation example in worked-examples.md.

Integration with Related Appraisal Skills

Easement valuation methods: Income approach is the primary method for valuing perpetual easement income (telecom carrier payments, capitalized agricultural rent loss in transmission corridors).
Comparable sales adjustment methodology: Provides the extraction data set used in cap rate Method 1, and the reconciliation check at the end of the workflow.

Land Capitalization Calculator

Tool: land_capitalization_calculator.py (located in same folder as this SKILL.md)

Capabilities:

Market rent analysis and reconciliation
Multiple cap rate derivation methods (extraction, band of investment, build-up)
NOI calculation with customizable operating expenses
Land value calculation with sensitivity analysis
Comparison to comparable sales approach
PDF report generation

Input format (JSON):

{
  "subject_property": {
    "property_type": "telecom_ground_lease",
    "location": "Chicago, IL",
    "size_acres": 0.5,
    "valuation_date": "2024-11-17"
  },
  "market_rent_analysis": {
    "comparable_rents": [
      {
        "rent_annual": 32000,
        "adjustments": {"term_adjustment": 0},
        "source": "Similar tower site, same carrier"
      }
    ],
    "concluded_market_rent": 32000
  },
  "operating_expenses": {
    "property_tax": 2000,
    "insurance": 800,
    "maintenance": 1200,
    "management_fee_percent": 5
  },
  "cap_rate_analysis": {
    "method": "market_extraction",
    "cap_rate_range": {"low": 0.06, "high": 0.09},
    "concluded_cap_rate": 0.060
  }
}

Usage:

/income-approach-land path/to/rental_data.json

/income-approach-land path/to/rental_data.json --output $CLAUDE_PROJECT_DIR/Reports/2025-11-17_land_valuation.md

Input Schema: land_rental_input_schema.json

7-Step Workflow:

Validate Input: Validates JSON against land_rental_input_schema.json
Analyze Market Rent: Reconciles comparable rents to market rent conclusion
Select Capitalization Rate via:
- Market extraction: Cap Rate = NOI ÷ Sale Price
- Band of investment: (LTV% × Debt Yield) + (Equity% × Equity Yield)
- Buildup method: Risk-free + Liquidity + Inflation + Business Risk
Calculate NOI: Market Rent − Operating Expenses
Calculate Land Value: NOI ÷ Cap Rate
Reconcile with Sales: Compare with sales comparison approach (if available)
Sensitivity Analysis: Test ±0.5% cap rate impact on value; generate timestamped markdown report

Report Naming: $CLAUDE_PROJECT_DIR/Reports/YYYY-MM-DD_HHMMSS_income_approach_{site_type}.md

Direct calculator invocation:

cd ${CLAUDE_PLUGIN_ROOT}/skills/income-approach-expert/
python land_capitalization_calculator.py input.json --output results.json --verbose

Output: NOI breakdown, cap rate justification, land value conclusion, sensitivity tables (±0.5% cap rate, ±5% rent), reconciliation with sales (if provided), PDF appraisal-grade report.

Key Assumptions and Documentation

For defensible appraisal work, document:

Market rent conclusion: 3+ comparable rents, adjustments shown, sources and timing.
Operating expenses: Category breakdown, methodology (% GRI, per-unit, market survey), landlord-vs-tenant responsibility.
Capitalization rate: Primary method, supporting data, ±0.5% sensitivity, comparison to published surveys when available.
Highest and best use: Why income approach is most appropriate; why other approaches are insufficient.
Limitations: Lease renewal uncertainty, commodity / weather risk (agricultural), operator credit risk (telecom), thin comparable transaction data.

Key Terms

NOI (Net Operating Income): Effective gross income less operating expenses.
Cap Rate: NOI ÷ Sale Price (extraction view); the all-in yield that capitalizes stabilized NOI to value.
Market Rent: The rent a property would command in an arm's-length transaction, supported by comparable evidence.
Ground Lease: A long-term lease of land where the tenant typically owns improvements during the lease term; reversion of improvements at lease end depends on the lease.
Reversion Value: The estimated value of the property at the end of the lease term, discounted back to present value.
Sensitivity Analysis: Test of how value changes when key assumptions (cap rate, rent, OpEx) vary by defined increments.
Band of Investment: Cap rate derivation that blends debt and equity yields weighted by capital structure.
Build-Up Method: Cap rate derivation from risk-free rate plus liquidity, inflation, and business risk premiums.

Reference Files

cap-rate-tables.md — Cap rate ranges by property type, agricultural rent benchmarks, band-of-investment and build-up component tables, extraction reference set.
comparable-rent-catalog.md — Telecom and agricultural rent comparable catalogs, full adjustment methodology, evidence sources by use type.
worked-examples.md — Full walkthroughs: telecom cellular tower, 80-acre Class 2 agricultural with sales reconciliation, 25-year shopping-center ground lease with reversion, perpetual easement, single- and multi-variable sensitivity scenarios.

Agent Skills: income-approach-expert

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