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2013 GISCO Track, Using GIS to Help Appraisal Staff Value Property by Pete Coventry and Adam Hoppe
 

2013 GISCO Track, Using GIS to Help Appraisal Staff Value Property by Pete Coventry and Adam Hoppe

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Boulder County Assessor's Office GIS staff work hands on with appraisers to improve data/attributes for mass appraisal. You will get a brief overview of how GIS is used to facilitate fieldwork, find ...

Boulder County Assessor's Office GIS staff work hands on with appraisers to improve data/attributes for mass appraisal. You will get a brief overview of how GIS is used to facilitate fieldwork, find and fix inaccurate attributes, and speed up the review and update of property information.

Topics covered will include the mapping of features known to affect property values, as well as those not always associated with mass appraisal. Additionally, differences between data gathering for properties in the mountains vs. plains will be highlighted.

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    2013 GISCO Track, Using GIS to Help Appraisal Staff Value Property by Pete Coventry and Adam Hoppe 2013 GISCO Track, Using GIS to Help Appraisal Staff Value Property by Pete Coventry and Adam Hoppe Presentation Transcript

    • Getting it Done Using GIS to Help Appraisal Staff Rapidly Update and Improve Property Data Pete Coventry, Adam Hoppe Boulder County Assessor’s Office GIS Department Boulder, Colorado
    • Overview • Boulder County • Assessor’s Office structure Data Mining • From the Assessor’s Database • Getting it into GIS Focus on Residential Properties
    • GIS for Appraisal work • In the field • Capturing Attributes (valuation) • Analysis & Modeling
    • Where we work Geology.com
    • Where we work 720 square miles One-third plains Two-thirds mountains 125,000 real properties 98,000 residential
    • Diverse Landscape
    • Diverse Properties
    • How we work Why is property Assessed • Basis for generating tax revenues for local services Assessors Role • Identify and values property within the county in accordance with state law • Equalize property values/ taxes distributed fairly Re-valued every odd # year
    • Teams = Geographic Areas
    • Assessor’s GIS Department Led by Cindy Braddock • 3 GIS Specialists • 3.5 GIS Techs Responsible for… A LOT!
    • Data Mining Why and How • Requests for information – Public, partners, other County departments • Helps us improve quality of information • Understand what we’ve already got – Right, Wrong, Inconsistent – Know what to fix
    • 100’s of tables 1000’s of fields
    • Add tables Join on Key Field Set requirements/parameters
    • “Bubble” Maps
    • Permit Fieldwork • Status as of January 1st • Remodels, other high $ improvement adds value • Generates tax revenue for our districts • New residential construction – Vacant to residential changes assessment rate – Determined by existence of a foundation
    • Mountain Attributes Human Judgment: • View • Privacy • Access
    • Mountain Attributes GIS Terrain Analysis captured: • Topography • Aspect
    • Dick’s Views on Views
    • Field Data -> Excel Spreadsheets-> Mass Uploaded into Database
    • Examining Sales Ratios Sales Ratio = Estimated Sales Price (ESP)/Time-Adjusted Sales Price • Any ratio between 0.95 and 1.05 is ‘acceptable’ • Sales ratios << 1.00 – UNDERVALUED ESP? • Sales ratios >> 1.00 – OVERVALUED ESP? • Cause: incorrect or missing property information?
    • Planes, Trains & Automobiles…
    • Planes, Trains & Automobiles… Actually… Power Lines, Towers, and Railroads
    • Planes, Trains & Automobiles…
    • …Automobiles (Traffic, really)
    • GIS Analysis
    • The Heartbreak of…
    • http://geology.com/articles/expansive-soil.shtml
    • 2008
    • 2008 - 2009
    • 2008 - 2010
    • 2008 - 2011
    • 2008 - 2012
    • Thanks for attending! Any questions?? Adam Hoppe – ahoppe@bouldercounty.org Pete Coventry – pcoventry@bouldercounty.org Adam Hoppe & Pete Coventry Boulder County Assessor’s Office GIS Department Boulder, Colorado
    • Geographic Areas = 5 Models
    • Sales Ratio = 1.6 • • • • • Sold for $514,000 TMADJ SP = $513,000 ESP = $800,000 Overvalued ESP Time for review
    • Sales Ratio = 0.81 • • • • • Sold for $675,000 TMADJ SP = $660,000 ESP = $540,000 Underestimated ESP Appraiser will review property attributes to determine if incorrect or missing
    • Coming Soon… Bye, bye ArcReader Hello ArcGISExplorer • More bells and whistles and flexibility for the users (appraisers) • Much Faster • More customization on the front end which helps deliver more useful maps • More programming… C#