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ZIP 78745 is South Austin's most populous and actively redeveloping ZIP, stretching across the South Lamar, South Manchaca, and Meadow Creek areas between South Congress and Manchaca Road. The ZIP has a nearly even owner-renter split, a rapidly appreciating housing market driven by teardown-and-rebuild activity, and flood exposure along Onion Creek and Williamson Creek tributaries that affects a meaningful minority of properties.
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78745 is characterized by a mix of 1950s–1980s ranch-style homes, newer single-family builds, apartment complexes along major arterials, and a growing number of modern townhomes and infill projects. The South Lamar corridor has seen significant commercial development and densification. The area is bounded by the Slaughter Lane commercial strip to the south, South Congress to the east, and Manchaca Road to the west. Older housing stock dominates the eastern portions; newer construction is concentrated toward the south and west. The ZIP has a large Hispanic/Latino community — particularly in the South Manchaca sub-area — and a strong local culture centered around neighborhood parks and community events.
Onion Creek runs through the southern portion of 78745 and has the most severe flood history in the Austin metro area — including major flooding events in 2013 and historically significant events in the 1980s that led to the largest flood buyout program in Austin's history. Properties near Onion Creek should be individually verified against current FEMA maps. Williamson Creek, which runs through the central-western portion of the ZIP, has flooded in 1998, 2001, and 2013. Most of the ZIP's higher-ground, inland streets are Zone X and carry low flood risk. Property crime is near the Austin city average — the Slaughter Lane retail corridor has above-average commercial theft, while residential streets are generally safer.
The primary insurance issue in 78745 depends on location within the ZIP. For properties near Onion Creek or Williamson Creek, flood insurance is critical — some properties in this ZIP have flooded multiple times, and NFIP coverage should be evaluated regardless of lender requirements. For the majority of 78745 homeowners on higher ground, the key issue is ensuring dwelling coverage reflects current rebuild costs. The active redevelopment market means many homes have been renovated or replaced — policies written on original assessments will be significantly undervalued. Renters in the ZIP's apartment complexes should carry renters insurance given above-average property crime near commercial corridors.
78745 is one of Austin's most demographically balanced ZIP codes — the population is split roughly evenly between White (60.6%) and Hispanic/Latino (37.2%) residents, with a nearly even owner/renter split (46% owner, 54% renter). Median age aligns with the Texas statewide median. The ZIP attracts both first-time homebuyers seeking entry-level South Austin pricing and renters priced out of closer-in ZIPs. Redevelopment activity is high, with 78745 frequently cited as one of Austin's fastest-redeveloping ZIP codes.
78745 is one of Austin's most actively redeveloping ZIP codes — a description used by multiple Austin realtors as of early 2026. Teardown-and-rebuild activity is high particularly in Meadow Creek, South Manchaca, and areas between South 1st and South Congress. This means a significant share of the housing stock is newer construction with current code compliance, but also that older policies may not account for the actual rebuild value of improved properties. The City of Austin's Onion Creek flood buyout program has removed some of the most at-risk properties from the housing stock, but adjacent and nearby properties remain in moderate-to-high risk zones. Austin's Atlas 14 remapping may further expand designated flood corridors along Williamson Creek.
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