Total monthly cost of ownership
Cost to Own a Home in St. George Island, Florida
A $629,000 home here costs
$4,693per month, all in — with 20% down at today's 6.66% 30-year fixed rate.
A standard mortgage calculator would have told you $3,234. The real number is $1,460 higher every month — 45% 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.
St. George Island against Franklin County and Florida
| Measure | St. George Island | Franklin County |
|---|---|---|
| Median home value | $628,500 | $254,300 |
| Median property tax | $4,208 | $1,572 |
| Effective tax rate | 0.670% | 0.618% |
| Median gross rent | — | $1,044 |
| Population | 1,218 | 12,418 |
The weather behind that power bill
St. George Island sits in Franklin County, which averages a high of 89.7°F in its hottest month and a low of 44.4°F in its coldest, with 53.08" of precipitation a year and 37% of it in a single three-month stretch. That climate drives 2,738 cooling and 1,224 heating degree days, which is what sets the $136 electricity line above.
See the full climate breakdown for Franklin County — month by month temperatures, rainy season timing, snowfall and heating and cooling costs.
Other cities in Franklin County
Full Franklin County cost breakdown · Every county in Florida
Common questions
How much does it cost to own a home in St. George Island?
A $629,000 home in St. George Island, Florida costs approximately $4,693 per month with 20% down at 6.66%. That is $3,234 principal and interest, $351 property tax, $380 homeowners insurance, $204 utilities and $524 set aside for maintenance.
What is the property tax rate in St. George Island?
St. George Island has an effective property tax rate of 0.670%, based on a median home value of $628,500 and median real estate taxes of $4,208. That is higher than the Franklin County average of 0.618%.
What is the average home price in St. George Island?
The median owner-occupied home value in St. George Island, Florida is $628,500, against $254,300 across Franklin County.
Is it cheaper to rent or buy in St. George Island?
Rent data is not published for St. George Island at this level of detail.
Sources & methodology
- Median home value, real estate taxes, gross rent and population for St. George Island — US Census Bureau, American Community Survey ACS 2023 5-Year, place-level tables.
- Homeowners insurance — NAIC average premium for Florida.
- 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.