Union, SD Sees 43.3% of Home Sales Close Off-Market, Signaling Active Investor Deal Flow
With 165 recorded transactions bypassing the MLS, Union County presents unique sourcing opportunities for real estate investors.
Real estate investors and agents looking for opportunities beyond the traditional Multiple Listing Service (MLS) should take note of Union County, South Dakota. According to BatchData's On Market vs Off Market Sold Report for July 2026, a significant 43.3% of all home sales in Union County closed off-market. This means nearly half of all transactions occurred privately, without ever being listed on the open market, indicating a robust channel for non-traditional deals.
County Overview
In July 2026, Union County recorded a total of 381 home sales. A closer look at these transactions reveals a distinct split in how properties change hands. The majority, 216 sales, or 56.7%, were on-market transactions, closing through the MLS. However, a substantial 165 sales, representing 43.3% of the total, were classified as off-market. These off-market sales are identified by comparing assessor's sale records against MLS data; if a recorded sale has no matching MLS close within a specific price and date window, it is considered off-market. This channel is typically associated with active investor and wholesale deal flow, where properties are transacted privately.
The high proportion of off-market sales in Union County suggests that a considerable segment of its housing inventory is being traded outside of public listings. For real estate investing professionals, this metric is a crucial indicator of a market where opportunities might be found through direct outreach and specialized data, rather than solely relying on MLS feeds. This prevalence of private transactions can be a signal of a dynamic local market where investors are actively acquiring and divesting properties without the need for traditional brokerage services, often seeking to streamline processes or find specific types of deals.
Local Market Context
Union County's performance in off-market sales positions it notably within South Dakota. The county ranks #9 out of 58 counties in South Dakota by total sales volume, accounting for 2.9% of the state's total 13,100 sales. Despite not being the largest county by raw transaction count, its 43.3% off-market share suggests a distinctive market composition. This figure is a strong signal that private deal-making plays a disproportionately active role in Union County compared to what might be expected from its overall sales volume ranking.
This elevated off-market activity implies that while Union County contributes a smaller share to the statewide transaction total, it offers a fertile ground for alternative sourcing strategies. For investors, this translates to a market where a significant portion of potential deals may never appear on public platforms. Identifying these off-market properties requires robust data solutions like a property data API or bulk data delivery to uncover properties based on specific criteria, such as owner type, equity, or distress signals, before they hit the market.
The implications for investors sourcing deals in Union County are clear: relying solely on on-market listings will mean missing out on a substantial portion of available inventory. Tools that leverage assessor data and provide insights into property ownership and transaction history are essential for uncovering these private sales. Strategies like skip tracing become more critical in such a market to directly connect with property owners who might be open to selling without going through the MLS, allowing investors to access deals that bypass traditional competition. This distinct mix of sales channels underscores the importance of a comprehensive data strategy for identifying and capitalizing on the unique opportunities present in Union County's real estate market.