Sun City retrospective appraisal work becomes more reliable when the historical competitive set is defined before the search radius expands. Eligibility rules narrow the buyer pool and distinguish Sun City from conventional neighborhoods nearby. Retrospective work is driven by the effective date, not by the date the appraiser happens to inspect the property.
A retrospective appraisal should identify what the neighborhood, competing inventory, access, and development pattern looked like on the effective date. Later growth can explain how the area changed, but it should not be used as if historical buyers already had those choices. For Sun City, the appraisal should consider aging housing stock only when it changes the subject's competitive position.
In reconstructing the prior market, eligibility rules narrow the buyer pool and distinguish Sun City from conventional neighborhoods nearby. In retrospective work, the issue has to be viewed from the earlier market rather than from today's completed setting.
Looking back to the earlier market, course location, recreation access, community obligations, and amenity structure can influence buyer choices beyond the dwelling. That can justify moving beyond the closest sale when a more distant transaction better matches the historical buyer decision.
Market movement can help explain the period, but a retrospective value should not be produced by mechanically applying a citywide appreciation rate to today's value. The subject still needs historical comparable evidence from its actual segment.
Historical market data is strongest when paired with records that show what the property and neighborhood actually looked like on the effective date. Later information can be considered as context, but it should not replace evidence from the prior market.
The final value should reflect the market participants actually faced on the earlier date. A clear reconciliation explains both the evidence that was used and the later information that was intentionally kept out.
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