78621 — Williamson County, Texas Market Snapshot
Housing market data for zip code 78621 in Williamson County, Texas. Updated monthly with median prices, days on market, and more.
Market Sales Data
156 sales in 2026 (year to date)
Median Sale Price
$279,982
Days to Sell
101
Homes Sold
156
Inventory
308
Sale-to-List
98.4%
New Listings
229
Price/SqFt
$161
Pending Sales
214
Conforming Loan Available
Most homebuyers in 78621 can comfortably use conventional financing. The median home price of $279,982 is well below the 2026 conforming loan limit of $832,750, meaning buyers can put as little as 3-5% down without hitting jumbo loan territory.
Market Insights
Market Temperature
With homes sitting for 101 days on average, 78621 favors buyers. There may be opportunities to negotiate below asking price or request seller concessions for closing costs or rate buydowns.
Sale-to-List Ratio
Homes are selling very close to asking price in 78621 (98.4% sale-to-list ratio), indicating accurate pricing by sellers and steady demand.
Conforming Loan Feasibility
Most homebuyers in 78621 can comfortably use conventional financing. The median home price of $279,982 is well below the 2026 conforming loan limit of $832,750, meaning buyers can put as little as 3-5% down without hitting jumbo loan territory.
Loan limits in 78621 are set at the county level.
2026 Loan Limits — Williamson County
| Property Units | Conforming Limit | FHA Limit |
|---|---|---|
| 1 Unit | $832,750 | $571,550 |
| 2 Units | $1,066,250 | $731,700 |
| 3 Units | $1,288,800 | $884,450 |
| 4 Units | $1,601,750 | $1,099,150 |
Affordability Snapshot — Zip 78621
To purchase the median home at $279,982 with 5% down at today's rate of 6.75%, the estimated monthly payment is approximately $2,295.
Monthly Payment
$2,295
Income Required
$98,363
Principal & Interest
$1,725/mo
Down Payment (5%)
$13,999
Based on 30-year fixed at 6.75%, 1.8% property tax, $1,800/yr insurance, 28% DTI guideline.
Mortgage Calculator
Estimate your monthly payment for a home in 78621.
Estimated Monthly Payment
$1,883
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