miami‐dade county › presentations_files › aag... · 2011-09-07 · with public school bus...
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Impacts of sex offender residency restrictions p yon the availability of affordable rental housing
in Miami‐Dade Countyin Miami Dade County
Paul ZandbergenDepartment of GeographyU i it f N M i
Timothy HartDepartment of Criminal JusticeU i it f N d L VUniversity of New Mexico University of Nevada, Las Vegas
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Sex Offender Residency RestrictionsSex Offender Residency Restrictions
• Limit where sex offenders can live– Schools, daycares, parks, bus stops
Distances vary from 500 to 3 000 feet– Distances vary from 500 to 3,000 feet
• Adopted by 30 States and 100s of local jurisdictions
• Benefit to reducing recidivism unproven• Negative consequences are well documented• Negative consequences are well documented
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Ordinances in FloridaOrdinances in Florida
24 Counties 142 Municipalities
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Miami’s ShantytownMiami s Shantytown
As many as 100 convicted sex offenders resided under the Julia Tuttle Causeway
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Purpose of Current StudyPurpose of Current Study
A l h i f ll id i i• Analyze the impact of all residency restrictions on the availability of affordable housing
Scenarios – state/county/local
Spatial patterns – variation by community
Note: study commissioned by the Greater Miami Chapter of the American Civil Liberties Union
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MethodologyMethodology
Restriction Zones
1. Inventory of ordinances2 Parcel level mapping of locations of interestZones 2. Parcel‐level mapping of locations of interest3. Mapping restriction zones
AffordableHousing
4. Parcel‐level housing cost‐model5. Calibrate based on actually available rentalsHousing 5. Calibrate based on actually available rentals
Combination 6. Overlay restrictions zones with housingCombination 6. Overlay restrictions zones with housing
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Inventory of OrdinancesInventory of Ordinances
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Inventory of OrdinancesInventory of Ordinances
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Locations of InterestLocations of Interest
schools daycares parks school bus stops
Parcel geocoded and validated against orthophotos
n = 1,841 ‐ 89% geocoded n = 742 ‐ 99% geocoded n = 38,882n = 1,142 ‐ 99% geocoded
Parcel geocoded and validated against orthophotos
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ScenariosScenariosWithout public school bus stops 1. State 1,000 feetWithout public school bus stops 1. State 1,000 feet
2. State 1,500 feet3. State 1,000 feet + Miami‐Dade4 State 1 000 feet + local4. State 1,000 feet + local5. State 1,000 feet + Miami‐Dade + local
With public school bus stops 6. State 1,000 feetWith public school bus stops 6. State 1,000 feet7. State 1,500 feet8. State 1,000 feet + Miami‐Dade9 State 1 000 feet + local9. State 1,000 feet + local10. State 1,000 feet + Miami‐Dade + local
Without public school bus 11. State 1,000 ft + localpstops for State + County andwith public school bus stopsfor local as applicable
,12. State 1,000 ft + Miami‐Dade + local
for local as applicable
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Restriction ZonesRestriction ZonesScenario 1 Scenario 10
State 1,000 feet, no public school bus stops
State 1,000 feet + County + local, with public school bus stops
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Individual Housing Unit ModelIndividual Housing Unit Model1,042,572 tax assessment records1,042,572 tax assessment records
All housing unitsRent vs. ownMonthly cost
11, 361 rentals in January 2009
Monthly cost
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$600,000
$500,000
$400,000
($)
$300,000
ssm
ent V
alue
$200,000Tax
Ass
e
y = 193 45x - 45411
$100,000
y 193.45x 45411R2 = 0.7832
$-$- $500 $1,000 $1,500 $2,000 $2,500
Monthly Rent ($)
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Field Validation of MLSField Validation of MLS
Multiple Listings Service does underestimate availability of low‐cost rental units, but not in low‐density suburban
and fringe areas outside of restriction zones
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Affordable Housing Units (< $1 250)Affordable Housing Units (< $1,250)
Scenario Total Rentals
No restrictions 406,504 270,874No restrictions 406,504 270,874
Count
1. State 1000 feet (no school bus stops) 73,987 44,963
3. State 1000 feet (no school bus stops) + Miami‐Dade 21,508 14,754
11. State 1000 feet (no school bus stops) + local (school bus stops) 40,762 21,542
12. State 1000 (no school bus stops) + Miami‐Dade + local (school bus stops) 11,198 6,832
Percentage (of the baseline scenario)
1. State 1000 feet 18.20 16.60
3 State 1000 feet (no school bus stops) + Miami Dade 5 29 5 453. State 1000 feet (no school bus stops) + Miami‐Dade 5.29 5.45
11. State 1000 feet (no school bus stops) + local (school bus stops) 10.03 7.95
12. State 1000 (no school bus stops) + Miami‐Dade + local (school bus stops) 2.75 2.52
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Affordable Housing Units (< $1 250)Affordable Housing Units (< $1,250)
Jurisdiction Baseline Scenario 12
Miami 65,711 0
Miami Beach 25,927 0
dHomestead 9,402 349
Unincorporated 83,402 5,445
Total 270,874 6,832
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Actually Available Rentals (July 2009)Actually Available Rentals (July 2009)
Scenario < $750 $751‐ $1,000 $1,001 ‐ $1,250 TotalNo restrictions 203 1,139 1,361 2,703Without public school bus stops1 St t 1 000 f t 23 249 317 5891. State 1,000 feet 23 249 317 5892. State 1,500 feet 7 121 117 2453. State 1,000 feet + Miami‐Dade 2 95 117 2144. State 1,000 feet + local 9 107 141 257,5. State 1,000 feet + Miami‐Dade + local 0 34 43 77With school bus stops6. State 1,000 feet 0 5 18 237 St t 1 500 f t 0 1 1 27. State 1,500 feet 0 1 1 28. State 1,000 feet + Miami‐Dade 0 2 3 59. State 1,000 feet + local 0 1 2 310. State 1,000 feet + Miami‐Dade + local 0 1 2 3,Without school bus stops for State + County and with school bus stops for local as applicable11. State 1,000 ft + local 9 88 126 22312. State 1,000 ft + Miami‐Dade + local 0 15 28 43
Results for January 2009 were very similar.
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Actually Available Rentals (July 2009)Actually Available Rentals (July 2009)
Jurisdiction Baseline Scenario 12
Miami 406 0Miami 406 0
Miami Beach 531 0
Homestead 183 9
Unincorporated 724 30
Total 2,703 43
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Summary ResultsSummary Results
• Availability of affordable rental housing units reduced to 6, 823, or 2.5% of baseline
• Number of affordable units on the market reducedNumber of affordable units on the market reduced from 2,703 to 43
• Very uneven spatial distribution, with available units in outlying areasin outlying areas
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July 2009
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August 2009
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October 2009
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February 2010
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March 2010Florida Senate Bill SB 1284 – 2010
Florida House Bill HB 119 – 2010
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Rise (and fall?) of Residency RestrictionsRise (and fall?) of Residency Restrictions
1. Rapid adoption of residency restrictions in South Florida
2. Near‐elimination of affordable housing
3. Outcome of legal challenges and new state law?
4. Current trend towards loitering ordinances
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Funding SupportFunding Support
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Questions?Questions?
www.paulzandbergen.comwww.aclufl.org/pdfs/SORRStudy.pdf
www.aclufl.org/pdfs/SORRSummaryDeclaration.pdfwww.aclufl.org/tuttle