Total monthly cost of ownership
Cost to Own a Home in Williamson County, Texas
A $415,000 home here costs
$3,493per month, all in — with 20% down at today's 6.66% 30-year fixed rate.
A standard mortgage calculator would have told you $2,134. The real number is $1,359 higher every month — 64% more than the payment most buyers budget for.
Where every dollar goes
Only the first line is a mortgage payment. Change any assumption above and every figure below recalculates.
How Williamson County compares
Williamson County ranks 218th of 3,133 US counties by effective property tax rate, meaning property taxes here are lower than in 2,915 counties and higher than in 217. Within Texas it ranks 22nd of 250.
The numbers behind this page
| Measure | Williamson County | Source |
|---|---|---|
| Median home value | $414,600 | ACS B25077 |
| Median real estate taxes paid | $7,079 | ACS B25103 |
| Effective property tax rate | 1.707% | Derived |
| Median gross rent | $1,720 | ACS B25064 |
| Occupied housing units | 241,754 | ACS B25003 |
| Population | 643,889 | ACS B01003 |
| Residential electricity price | 16.44¢/kWh | EIA 5.6.A |
| 30-year fixed mortgage rate | 6.66% | Freddie Mac PMMS |
Other counties in Texas
Compare the cost of the same home elsewhere in the state.
Questions about owning here
What is the property tax rate in Williamson County?
The effective property tax rate in Williamson County, Texas is 1.707% of home value per year. On the county's median home value of $414,600, that works out to about $7,079 annually, or $590 per month.
How much does it cost to own a home in Williamson County?
A $415,000 home in Williamson County, Texas costs approximately $3,493 per month with 20% down at 6.66%. That breaks down as $2,134 principal and interest, $590 property tax, $208 insurance, $216 utilities and $346 set aside for maintenance.
Why is this higher than the payment my lender quoted?
Lender quotes usually show principal and interest only, and sometimes property tax and insurance. They almost never include electricity, water or a maintenance reserve. Here those add about $562 a month, which is why the real cost is 64% above the mortgage payment alone.
Is it cheaper to rent in Williamson County?
Median gross rent in Williamson County, Texas is $1,720 per month, compared with $3,493 to own the median home outright. Renting is cheaper month to month, though rent does not build equity and is not fixed for 30 years.
How much is the electric bill in Williamson County?
Texas residential electricity averages 16.44¢ per kWh. At the US average household usage of 899 kWh per month, that is about $148. Actual bills vary considerably with house size, insulation and climate.
Sources & methodology
- Median home value, real estate taxes paid, gross rent, occupied units and population — US Census Bureau, American Community Survey ACS 2023 5-Year, tables B25077, B25103, B25064, B25003, B01003.
- Effective property tax rate — median real estate taxes paid divided by median home value.
- Mortgage rate — Freddie Mac PMMS, updated weekly.
- Residential electricity price — US Energy Information Administration, Electric Power Monthly, Table 5.6.A.
- Homeowners insurance (0.60%/yr), maintenance (1%/yr) and water and sewer ($68/mo) are modelled national estimates, not quoted figures. Every one is editable above.