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A light overview of utilizing GIS to research and analyze trends in comparison neighborhoods to improve the accuracy of property assessment/valuation for local governments.
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Improving Property
Valuation Through
Geospatial Analysis
Of
Comparison
Neighborhoods
What are we going to talk about?
o About Jefferson County PVA and Our GISo What is a Comparison Neighborhood?o Neighborhood Researcho Future Research Ideas
Where?Louisville/Jefferson County, Kentucky
Office of the Jefferson CountyProperty Valuation Administrator
o Appraise ≈286,800 properties at fair market value for taxation purposes.
o Over 300 Square Mileso Total Value: $51,950,394,385
LOJIC and GIS
o Louisville-Jefferson County Information Consortium Members:oMetropolitan Sewer Districto Louisville Metro Governmento Louisville Water Companyo Jefferson County PVA
GIS/CAMA Integration
o Change Spatial Attributes in Map Environmento Review Updated Datao Send Spatial Changes to CAMA through APIo Valuation CAMA Data Updated by Staffo Valuation CAMA Data Sent to LOJIC
Internal Benefits
o Visualize Tabular Data with Spatial Contexto View Spatial Trends in Valueo Identify Spatial Outlierso Fewer Dataset to Maintaino Increased Knowledge = Increased Productivity
External Benefits
o Informative Websiteo Revenue for Officeo Transparency
PVA Comparison Neighborhood
o Homogenous Groups of Real Propertyo Common Land Useo Similar Building Type and Ageo Analogous Access and Locationo Comparable Socioeconomic and Governmental
Characteristics
Utilization of PVA Neighborhoods
o CAMA Reporto Neighborhood Mapso Trends in:
o Saleso Valueso Foreclosures
CAMA Neighborhood Report
Neighborhood Maps
Visualization of Assessments and Sales
Focusing Valuation Efforts
o Low Sales Ratioso Highly Dispersed Sales Ratios W/I Neigh’so Conference Parcelso Rate of Sales W/I Neigh’s
Appealed Parcels
Map of Sales
Rate of Sales
Standard Deviationof Sales Ratio
o Clusters/Densityo Investor Ownedo Impact on Sales
Foreclosure Research
Predicting Land Values
ArcGIS Server
Summary/Review Presentation
o PVA Comparison Neighborhoodo Importance of Neighborhoodso Integration Leads to Improvemento Future Research
Questions?
Contact or Visit Us!
o Jefferson County PVAo Benjamin Hughes – bhughes@pvalouky.neto Jay Mickle (Dir. GIS) – jmickle@pvalouky.net
o www.pvalouky.neto 502.574.6380
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