Total monthly cost of ownership
Cost to Own a Home in Sunnyvale, Texas
A $541,000 home here costs
$4,563per month, all in — with 20% down at today's 6.66% 30-year fixed rate.
A standard mortgage calculator would have told you $2,781. The real number is $1,782 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.
Sunnyvale against Dallas County and Texas
| Measure | Sunnyvale | Dallas County |
|---|---|---|
| Median home value | $540,500 | $277,900 |
| Median property tax | $9,083 | $4,668 |
| Effective tax rate | 1.680% | 1.680% |
| Median gross rent | $1,216 | $1,469 |
| Population | 8,069 | 2,603,816 |
The weather behind that power bill
Sunnyvale sits in Dallas County, which averages a high of 97.1°F in its hottest month and a low of 37.9°F in its coldest, with 38.32" of precipitation a year and 30% of it in a single three-month stretch. That climate drives 3,125 cooling and 1,992 heating degree days, which is what sets the $148 electricity line above.
See the full climate breakdown for Dallas County — month by month temperatures, rainy season timing, snowfall and heating and cooling costs.
Other cities in Dallas County
Common questions
How much does it cost to own a home in Sunnyvale?
A $541,000 home in Sunnyvale, Texas costs approximately $4,563 per month with 20% down at 6.66%. That is $2,781 principal and interest, $757 property tax, $358 homeowners insurance, $216 utilities and $451 set aside for maintenance.
What is the property tax rate in Sunnyvale?
Sunnyvale has an effective property tax rate of 1.680%, based on a median home value of $540,500 and median real estate taxes of $9,083. That is in line with the Dallas County average of 1.680%.
What is the average home price in Sunnyvale?
The median owner-occupied home value in Sunnyvale, Texas is $540,500, against $277,900 across Dallas County.
Is it cheaper to rent or buy in Sunnyvale?
Median gross rent in Sunnyvale is $1,216 a month, against $4,563 to own the median home all in. Renting costs less month to month here, though renting builds no equity.
Sources & methodology
- Median home value, real estate taxes, gross rent and population for Sunnyvale — US Census Bureau, American Community Survey ACS 2023 5-Year, place-level tables.
- Homeowners insurance — NAIC average premium for Texas.
- Electricity price — EIA Electric Power Monthly Table 5.6.A.
- Mortgage rate — Freddie Mac PMMS, refreshed weekly.
- Maintenance (1%/yr) and water and sewer ($68/mo) are national estimates. Every assumption above is editable.