Why the standard method breaks
Conventional pricing rests on an assumption that stops holding at the top of the market: that enough similar properties have sold recently to establish a range. In suburban Roseville that assumption is safe. In Los Lagos, Sierra de Montserrat or the estate corridors of Newcastle it is not.
When a community contains sixty-odd homes, a handful change hands in a year. Stretch the search back far enough to find three and you are now comparing against a different market. Widen the geography instead and you are comparing against a different product. Neither compromise is neutral, and choosing between them quietly determines the number you arrive at.
Price per square foot fails hardest here, because it treats land as a rounding error. On acreage, land is frequently the larger share of value. Two houses of identical size can be separated by a wide margin on parcel, privacy, outlook and access — none of which appear in a per-foot figure.
