Correcting HAZUS General Building Stock Structural Replacement Cost Data for Single-Family Residences

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Abstract

Alternative approaches are taken to correct HAZUS General Building Stock (HGBS) replacement cost data for single-family residences in Sarpy County, Nebraska, which are 92% higher than tax assessor estimates of depreciated structural replacement values (DSRVs). First, HGBS costs were reduced by 92% across all census blocks, resulting in mean block-level HGBS-assessor differences of -31% with a standard deviation of 144%. Second, DSRVs were regressed against non-cost-related HGBS data at the block level via six alternative model specifications, resulting in R2 values of 0.59-0.68. The preferred model based on HGBS square footage and other census-based data resulted in predicted HGBS replacement costs on average being 29% higher than DSRVs, although the standard deviation of the differences was 380%. Finally, regressing DSRVs against tax assessor building square footage data resulted in a R2 value of 0.96 and an underprediction of actual DSRVs across blocks by only 12%, with a correspondingly low standard deviation of 48%.

Original languageEnglish (US)
Article number04017015
JournalNatural Hazards Review
Volume18
Issue number4
DOIs
Publication statusPublished - Nov 1 2017

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Keywords

  • Disaster mitigation
  • General building stock
  • HAZUS
  • Social sciences

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Environmental Science(all)
  • Social Sciences(all)

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