# Income Approach Expert

> Overview: Income Approach to Land Valuation

- Skill: `reggiechan74/income-approach-expert` (Agent Skill, multi-file: 28 files)
- Install (CLI): `npx skillmds@latest add reggiechan74/income-approach-expert`
- Raw SKILL.md: https://api.skillmd.com/api/skills/reggiechan74/income-approach-expert/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: reggiechan74 (https://skillmd.com/u/reggiechan74)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/reggiechan74/income-approach-expert

---


## 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
1. Identify 3-5 comparable rents in the same market and use class.
2. Adjust for material differences (term, escalation, renewal, maintenance responsibility).
3. Reconcile to a single market rent conclusion.
4. 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](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

1. **Extraction**: Show extraction calculation for each of 3+ comps; reconcile to single rate.
2. **Band of investment**: Document LTV / debt yield / equity yield sources; show weighted calculation.
3. **Build-up**: Justify each premium with market evidence; compare result to extracted rates if available.
4. **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](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](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](cap-rate-tables.md). For full per-use valuation walkthroughs, see [worked-examples.md](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):

```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**:

```bash
/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**:

1. **Validate Input**: Validates JSON against `land_rental_input_schema.json`
2. **Analyze Market Rent**: Reconciles comparable rents to market rent conclusion
3. **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
4. **Calculate NOI**: Market Rent − Operating Expenses
5. **Calculate Land Value**: NOI ÷ Cap Rate
6. **Reconcile with Sales**: Compare with sales comparison approach (if available)
7. **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**:
```bash
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:

1. **Market rent conclusion**: 3+ comparable rents, adjustments shown, sources and timing.
2. **Operating expenses**: Category breakdown, methodology (% GRI, per-unit, market survey), landlord-vs-tenant responsibility.
3. **Capitalization rate**: Primary method, supporting data, ±0.5% sensitivity, comparison to published surveys when available.
4. **Highest and best use**: Why income approach is most appropriate; why other approaches are insufficient.
5. **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-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](comparable-rent-catalog.md) — Telecom and agricultural rent comparable catalogs, full adjustment methodology, evidence sources by use type.
- [worked-examples.md](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.