7.1 Sales Comparison Method for Land and Sites

Why Land Valuation Gets Its Own ECO Area

AQB Content Area III — Land or Site Valuation (ECO effective April 1, 2026) is a dedicated block of scored items: about 4 items (3.6%) at Certified General, and 5 items (4.5%) at Certified Residential and Licensed Residential. The ECO methodology list is explicit: sales comparison, allocation, extraction, residual, subdivision, and ground rent capitalization, plus influences on land or site value.

Even when land is a smaller dollar share of a total property value, wrong site value breaks the cost approach, distorts highest and best use as vacant, and misleads teardown or redevelopment analysis. Sales comparison of land is the market’s most direct answer when enough data exist: What are similar sites selling for?

Exam hierarchy of preference (conceptually):

1. Sales comparison of vacant/site sales when adequate comps exist (preferred).
2. Extraction or allocation from improved sales when vacant sales are thin.
3. Residual, subdivision development, or ground rent capitalization when the problem structure or property type supports those methods (income-driven land, development tracts, leased land).

This section masters method 1.

Preferred Method When Comparables Exist

The sales comparison method for land and sites estimates the value of the subject land or site by analyzing recent sales of similar parcels, expressing prices in a market unit of comparison, adjusting for differences, and reconciling an indicated value for the subject.

When it is preferred:

• Sufficient recent sales of parcels with similar highest and best use
• Sales that transfer comparable property rights (usually fee simple site, or same rights as the assignment)
• Enough data to support units of comparison and adjustments
• Subject is vacant, effectively vacant (teardown), or being valued as if vacant for cost approach / HBU

When it weakens:

• No or few vacant sales in the market area
• All “comps” have radically different zoning or utility readiness
• Sales are old and market conditions have shifted sharply without supportable time adjustments
• Subject is unique (extreme topography, contamination, rare zoning) and no peer set exists

Exam tip: Preferring sales comparison does not mean you invent vacant comps. If the stem says “no recent vacant sales,” the correct method may be extraction, allocation, residual, or another listed technique—not forced sales comparison with garbage data.

Land vs Site in the Sales Grid

Comparing a finished residential lot to unsubdivided raw acreage on price per acre without adjusting for lot yield, infrastructure, and entrepreneurial risk is a classic exam error.

Units of Comparison for Land and Sites

Markets do not always price land the same way. Choose the unit of comparison that market participants use for that property type and that produces the most consistent adjusted indications.

Worked unit conversion

Sale: 12,000 SF commercial pad sells for $480,000. Frontage is 80 feet. Zoning allows a 4,800 SF building (0.40 FAR on 12,000 SF).

If competing pads trade tightly on $/buildable SF because FAR differs across lots, that unit may reconcile better than raw site $/SF. If all lots have similar depth and the market talks in street frontage, $/FF may dominate—especially for retail.

Residential example: Three finished lots sell at $90,000, $95,000, and $88,000. Sizes are 7,500; 8,000; and 7,200 SF. Unit prices:

• $90,000 ÷ 7,500 = $12.00/SF
• $95,000 ÷ 8,000 = $11.88/SF
• $88,000 ÷ 7,200 = $12.22/SF

Tight clustering around $12/SF supports using site square footage as the unit. If sizes were nearly identical and buyers negotiate “per lot,” a per-lot unit is fine.

Elements of Comparison for Land (Adjustment Framework)

Land grids follow the same logical sequence as improved sales comparison, adapted to site attributes:

1. Transactional adjustments (usually first)

Assemblage / plottage sales may include a premium not applicable to a stand-alone subject—adjust or discard carefully.

2. Property (site) adjustments

Order discipline: Make transactional adjustments to cash-equivalent, arm’s-length, current-rights prices first; then adjust for location and physical/legal site differences. Do not adjust a non-market sale for topography until you have a reliable base price.

Raw Land vs Finished Site — Worked Comparison

Subject: Proposed single-family finished lot equivalent: 8,000 SF, level, utilities at curb, final plat approved, interior lot. HBU: one market-standard home.

Comp A — finished lot: Sold 3 months ago for $120,000; 8,200 SF; similar location and utilities; minor shape inferiority estimated at −$3,000.

Comp B — raw acreage sale: 2.0 acres sold for $160,000 one year ago. No utilities; no approved lots; buyer must rezone/subdivide. Market lot prices have risen 4% since Comp B. Engineering estimate to create four finished lots (streets, utilities, fees, entrepreneurial incentive allocated): $200,000 total for the tract, or $50,000 per potential lot. Realistic lot yield after roads: 3 net lots (not 4) because of detention and right-of-way.

Comp A indication (direct)

Adjusted price ≈ $120,000 − $3,000 shape = $117,000 for a near-equivalent finished lot.
$/SF ≈ $117,000 ÷ 8,200 ≈ $14.27/SF.
Subject 8,000 SF × $14.27 ≈ $114,000 (rounded).

Comp B indication (must convert readiness)

1. Time adjustment: $160,000 × 1.04 = $166,400 current price for the raw tract.
2. Add cost to create finished lots: $166,400 + $200,000 = $366,400 total “finished inventory” cost basis (simplified—real development analysis also discounts timing; see subdivision method later).
3. Per net lot: $366,400 ÷ 3 = $122,133 per finished lot equivalent.

Comp B, after readiness conversion, brackets Comp A. Reconcile near $115,000–$120,000 for the subject finished lot—not $160,000 ÷ 2 acres blindly applied as if raw and finished were the same product.

Exam takeaway: Unit price on raw land is not the finished site value. Either adjust for cost, time, risk, and yield, or treat raw sales as a different competitive set.

Building a Simple Land Sales Grid

Subject site: 10,000 SF rectangular commercial pad; full utilities; zoned for retail/office; 100 FF on arterial; HBU: small retail or service building.

Sale 1 adjusted: $350,000 (already similar) → $36.84/SF → subject indication 10,000 × $36.84 = $368,400.

Sale 2: $410,000 × 1.03 time = $422,300; × 0.98 size = $413,854; × 1.05 location = $434,547 → $36.21/SF site → subject $362,100.

Sale 3: $300,000 + $25,000 utility = $325,000; × 0.97 location = $315,250 → $35.82/SF → subject $358,200.

Reconciliation: Indications cluster about $36/SF → $360,000 site value (rounded). Supporting narrative: all three are full-fee arm’s-length retail-oriented pads; Sale 1 most similar; Sales 2–3 corroborate after readiness and location adjustments.

Front-Foot Emphasis (Retail / Waterfront Pattern)

When depth is adequate and value rides on exposure, markets quote $/front foot.

Sales:

• 60 FF × 150 depth, $240,000 → $4,000/FF
• 75 FF × 140 depth, $292,500 → $3,900/FF
• 50 FF × 200 depth (excess depth), $210,000 → $4,200/FF

Subject: 70 FF × 150 depth, similar utilities and zoning.
Reconcile near $4,000/FF × 70 = $280,000, then test whether excess depth on Sale 3 requires a depth adjustment before trusting its $/FF. Rule of thumb depth rules exist in some markets, but on the exam prefer market-derived depth adjustments over memorized tables unless the stem supplies a rule.

Teardown Sales as Land Comparables

Improved sales where buyers demolish the building can indicate land value:

Land indication ≈ sale price − demolition cost − any residual interim income adjustments + other recognized buyer expenditures

Example: House sells for $400,000; demo and make-ready $25,000; no other adjustments. Land indication ≈ $375,000 if the market is purely land-driven. Verify with vacant lot sales when available. Do not use teardown math when the building still contributes substantial value.

Reconciliation and Reporting Discipline

1. State HBU as vacant so the competitive set is correct.
2. State unit of comparison and why.
3. Present a grid or narrative adjustments with market support (paired data, cost to cure, broker interviews—exam level: recognize what needs support).
4. Reconcile to a single site value opinion (or range if assignment allows), weighting best comps.
5. Keep consistent use with later approaches: cost approach site value should match the land conclusion under the same HBU premise.

Common Exam Traps

• Using improved residential sales’ total prices as if they were lot prices.
• Mixing $/acre raw with $/SF finished without conversion.
• Ignoring zoning/density differences that change yield.
• Treating an assemblage premium sale as a pure market lot sale for a non-assemblage subject.
• Adjusting for building quality on a vacant land problem.
• Forgetting cash equivalency on creative land financing (common in raw land deals).

Bridge to Other Land Methods

When vacant sales are scarce, Area III expects allocation and extraction from improved sales, then residual, subdivision development analysis, and ground rent capitalization for income-oriented or development problems. Sales comparison remains the benchmark those methods try to approximate when the market is quiet. Master units, readiness, and the land grid first—most National Exam land items start there even when they end with another technique.