The story of this market
The typical home in Union County, South Dakota sells for about $363,886, or $206 per square foot.
Prices are up +3.54% from a year ago, so sellers still have some momentum. Homes take about 53 days to sell. Over the long run, values in this county have grown 160% since 2000. The biggest natural hazard here is winter weather, which FEMA rates very high. HUD's fair market rent for a two-bedroom is $1,194 a month.
HUD sets the fair market rent for a 2-bedroom at $1,194 a month. FEMA's National Risk Index rates overall hazard risk here as Relatively High.
Price climate
Every year of price change, 2000–2025
+6.4%
2025
Each stripe is one year's median price change across the area's census tracts (FHFA repeat-sales index). Deep blue is a strong gain year, red a falling year. Best: 2022 (+14.2%). Worst: 2011 (-1.9%). Hover to read a year.
Monthly price momentum
Home values since 2015
+4.8%
SD · past 12 months
Freddie Mac House Price Index, single-family homes, monthly through 2026-08. Each line starts at 100 in January 2015, so a reading of 180 means prices are up 80% since then.
Rent benchmark
Fair market rent by size
$1,447
3-bed / month
HUD Fair Market Rents, fiscal 2027, for this county. A typical rent for a modest unit, used to set housing-voucher payments.
Neighborhood price trend
Long-run price trend, 2000–2025
+6.4%
2025 change
FHFA repeat-sales index, median of 4 census tracts in this county (2000 = 100). Bars are each year's median change.
Natural hazard exposure
The area's risk shape
92
Relatively High
FEMA National Risk Index. Each spoke is a hazard ranked nationally, where 100 is the most exposed. Expected annual loss: $16,323,833.
Mortgage activity
Home lending in this county
83.3%
2018 approval rate
| Year | Applications | Loans made | Approval | Investor share | Median home value |
|---|---|---|---|---|---|
| 2018 | 769 | 500 | 83.3% | 12.2% | $215,000 |
CFPB Home Mortgage Disclosure Act records: every mortgage application reported by lenders for homes in this county. Approval rate is approved ÷ decided (withdrawn and incomplete files excluded). Investor share and home value are the median census tract.
Union County, South Dakota
Union County's housing market shows steady appreciation with a 3.54% year-over-year increase in median home values. The market remains supported by its proximity to the Sioux City metropolitan area and a low unemployment rate of 2%. Inventory levels remain constrained, contributing to the current price stability.
No ARED distress-ledger coverage for this county yet — the foreclosure ingest rotates the national county directory, and filings appear here once the county's posted notices are read. Key-figure check: no independent anchor retained yet — first-researched cycles establish the anchor baseline this pass.
Select a city to expand its ZIP intel reports beneath · 5 cities · 8 ZIP reports
Median prices moved up 5.2% year over year.
Homes spend a median of 83 days on market with 5.0 months of supply — a balanced-paced market.
25% of listings have cut prices · homes sell at 98.45% of asking — demand is running ahead of supply.
no recorded foreclosure-ledger notices (0.0 per 10,000 residents) · unemployment 2.0% · poverty 6.8% — a stable, low-distress profile.
Deterministic aggregate of 4 researched ZIP reports of 8 — sales_count-weighted (population fallback); per point, children lacking the value or its weight are excluded. Tax rates, sentiment and context notes are tier-native and never roll.
Union County, South Dakota — researched county-level history with a deterministic 1 / 3 / 5-year projection
Solid: researched ten-year history · dotted: 1 / 3 / 5-year projection extended from the historical 7.8%/yr trend — a deterministic estimate, not a published forecast or guarantee.
No researched properties in this county yet — the property base layer populates as property research runs, and each property feeds its ZIP's roll-up.
researched Sep 27
researched Sep 27
researched Sep 27
researched Sep 27
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researched Sep 27
| 57001 | Alcester | $229,882 | $135 | +219.3% | 43 | 98.5% | 15% | 3.2 | 12 | $839 | researched Sep 27 |
| 57004 | Beresford | $247,700 | $127 | +4.1% | 47 | 98.5% | 3.6% | 3.5 | 1,409 | $901 | researched Sep 27 |
| 57006 | Brookings | $305,000 | $134 | — | 65 | — | — | — | 61 | $887 | researched Sep 27 |
| 57025 | Elk Point | $303,000 | $171 | — | 87 | 98.5% | 28.1% | 5.2 | 875 | $1,150 | researched Sep 27 |
| 57038 | Jefferson | $245,000 | $142 | +3.2% | 68 | 97.8% | 8.5% | 4.2 | 14 | $913 | researched Sep 27 |
| 57039 | Lennox | $325,000 | $165 | +3.2% | 45 | 98.5% | 15% | 3.5 | 12 | $745 | researched Sep 27 |
| 57049 | North Sioux City | $459,863 | $168 | +6.4% | 62 | 98.2% | 12% | 3.8 | 32 | $1,147 | researched Sep 27 |
| 57068 | Valley Springs | $335,000 | $189 | +2.9% | 31 | 100% | 3.6% | 3.5 | 1,409 | $1,111 | researched Sep 27 |
Figures are each ZIP report's own latest research — the county roll-up aggregates them sales_count-weighted (population fallback); ZIPs cycle quarterly.
Union County is part of the Sioux City metropolitan area, which serves as the primary economic driver for the region.
Property taxes are assessed at the county level; specific rates are determined by local taxing districts including school, municipal, and county levies.
The economy is integrated with the Sioux City metropolitan area, with major employment sectors including agriculture, manufacturing, and regional services.
The county is served by regional highway corridors connecting to the Sioux City metropolitan area.
The county assessor manages property valuations for tax purposes in accordance with South Dakota state law.
Parcels are subject to various special districts including school districts and local municipal utility or service districts.
Data retrieved from US Census Bureau QuickFacts and Data Commons.
Property is assessed at full and true market value, then equalized to 85% of that value to determine the taxable value. The tax amount is calculated by multiplying the taxable value by the local mill levy rate, which is determined by the budgetary requirements of local government units (schools, counties, municipalities).
Governed by Title 10 of the South Dakota Codified Laws.
applies when — Applies to new structures and additions in specific subdivisions or developments where the board of county commissioners has adopted the formula.
Provides a tax break on the assessed value of new structures or additions for up to five or seven years, at the discretion of the county commissioners.
SDCL 10-6-144.
applies when — Applies to residential real property governed by a homeowners' association.
Sellers must provide the buyer with governing documents, a statement of assessments (amount, frequency, purpose), and a list of special one-time assessments from the previous three years prior to a written offer.
SDCL 43-4-44.1, effective for transfers after July 1, 2024.
Sellers of residential real property must provide a written property condition disclosure statement to potential buyers before a written offer is made, covering material facts about the property's condition.
SDCL 43-4-44.
Governance registry — every jurisdiction re-researches on a rolling 90-day cycle. Property reports compose these inherited burdens into a per-parcel ledger with conditional determinations. Informational only — not legal advice.