Total monthly cost of ownership
Cost to Own a Home in San Marcos, California
A $792,000 home here costs
$5,741per month, all in — with 20% down at today's 6.66% 30-year fixed rate.
A standard mortgage calculator would have told you $4,072. The real number is $1,669 higher every month — 41% 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.
San Marcos against San Diego County and California
| Measure | San Marcos | San Diego County |
|---|---|---|
| Median home value | $792,400 | $791,600 |
| Median property tax | $6,240 | $5,542 |
| Effective tax rate | 0.787% | 0.700% |
| Median gross rent | $2,191 | $2,154 |
| Population | 94,078 | 3,282,782 |
The weather behind that power bill
San Marcos sits in San Diego County, which averages a high of 90.8°F in its hottest month and a low of 35.6°F in its coldest, with 14.65" of precipitation a year and 62% of it in a single three-month stretch. That climate drives 957 cooling and 2,329 heating degree days, which is what sets the $299 electricity line above.
See the full climate breakdown for San Diego County — month by month temperatures, rainy season timing, snowfall and heating and cooling costs.
Other cities in San Diego County
Full San Diego County cost breakdown · Every county in California
Common questions
How much does it cost to own a home in San Marcos?
A $792,000 home in San Marcos, California costs approximately $5,741 per month with 20% down at 6.66%. That is $4,072 principal and interest, $519 property tax, $123 homeowners insurance, $367 utilities and $660 set aside for maintenance.
What is the property tax rate in San Marcos?
San Marcos has an effective property tax rate of 0.787%, based on a median home value of $792,400 and median real estate taxes of $6,240. That is higher than the San Diego County average of 0.700%.
What is the average home price in San Marcos?
The median owner-occupied home value in San Marcos, California is $792,400, against $791,600 across San Diego County.
Is it cheaper to rent or buy in San Marcos?
Median gross rent in San Marcos is $2,191 a month, against $5,741 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 San Marcos — US Census Bureau, American Community Survey ACS 2023 5-Year, place-level tables.
- Homeowners insurance — NAIC average premium for California.
- 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.