Estimating Land Values (Gwartney)

Summary

"Estimating Land Values" (~1999, hosted at henrygeorge.org, also mirrored at cooperative-individualism.org) is the movement's canonical practitioner's essay on how site value is actually assessed. Its authority is biographical: Ted Gwartney spent a career as a working assessor — including with British Columbia's province-wide assessment authority, which values on the order of a million-plus parcels annually, and as assessor in Greenwich, Connecticut — and served as president of the Council of Georgist Organizations.[1] When Lars Doucet wrote the assessment installment of his ACX series, Gwartney was the expert he consulted; this page carries the primary so the wiki cites the assessor, not the synthesis.[2]

The essay walks through the standard toolkit: the three classical approaches (sales comparison, cost, income), how land value is separated from improvement value in practice, and why regular revaluation at market standards is administratively routine rather than exotic — the practitioner's answer to the assessment objection.

Why It Carries Weight — and Its Limits

• It is testimony from practice, not advocacy theory: the procedures described are the ones operating assessment authorities use (mass-appraisal methods covers the modern statistical toolkit — CAMA, regression methods — that industrializes them).
• Its limits are the position's limits: a practitioner essay is level-3/6 evidence depending on the claim — authoritative on how assessment is done, advocate-aligned on how well it suffices for full rent capture, where the search-theoretic critique and Bentick–Mills assessment-basis issues live.
• Verification note (resolved on direct read). The full essay was read directly at henrygeorge.org. Its byline is "Ted Gwartney, MAI, Assessor, Greenwich, Connecticut," and the text states "For 12 years, the author was the Assessment Commissioner for the Province of British Columbia, Canada" — confirming the practitioner biography. The procedural claims are confirmed verbatim: an eight-step assessment procedure (defining the assignment, determining/collecting/verifying/analyzing data, estimating market values, public examination, and periodic — annual — updating of assessments); the three classical approaches (sales comparison, cost, income); and specific land-valuation methods (per-lot, per-square-foot, per-acre and per-front-foot sales comparison, proportional relationship, developmental analysis, allocation, extraction, ground-rent capitalization, subdivision development, land-value maps, and computer-estimated values). The essay carries no explicit publication date on the page, so the ~1999 dating remains approximate.

Bears On

• Objection: Land cannot be assessed — the practitioner backbone of the response
• Concept: Mass-Appraisal Methods
• Research: Doucet, Does Georgism Work? — the synthesis this page de-references

See Also

• Dye & England, Assessing the Theory and Practice of LVT
• FHFA land-price methodology — the modern statistical counterpart
• IAAO Standards: Ratio Studies & Property Tax Policy — the professional-standard formalization of the eight-step assessment procedure Gwartney describes

Sources

1. Ted Gwartney, "Estimating Land Values," c. 1999. henrygeorge.org — full text read directly in this pass; used for the essay's content, the eight-step assessment procedure, the three approaches and specific land-valuation methods, and the practitioner-biography claims (byline "Assessor, Greenwich, Connecticut"; "12 years… Assessment Commissioner for the Province of British Columbia").
2. Lars Doucet, "Does Georgism Work? Part 3," Astral Codex Ten, December 2021. Article — used for the consultation attribution (A-claim; snippet-corroborated).