Total monthly cost of ownership
Cost to Own a Home in Ko Olina, Hawaii
A $886,000 home here costs
$6,133per month, all in — with 20% down at today's 6.66% 30-year fixed rate.
A standard mortgage calculator would have told you $4,555. The real number is $1,578 higher every month — 35% 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.
Ko Olina against Honolulu County and Hawaii
| Measure | Ko Olina | Honolulu County |
|---|---|---|
| Median home value | $885,500 | $873,000 |
| Median property tax | $2,234 | $2,482 |
| Effective tax rate | 0.252% | 0.284% |
| Median gross rent | $3,501 | $2,054 |
| Population | 1,677 | 1,003,666 |
The weather behind that power bill
Ko Olina sits in Honolulu County, which averages a high of 85.6°F in its hottest month and a low of 64.4°F in its coldest, with 21.78" of precipitation a year and 41% of it in a single three-month stretch. That climate drives 3,609 cooling and 0 heating degree days, which is what sets the $467 electricity line above.
See the full climate breakdown for Honolulu County — month by month temperatures, rainy season timing, snowfall and heating and cooling costs.
Other cities in Honolulu County
Full Honolulu County cost breakdown · Every county in Hawaii
Common questions
How much does it cost to own a home in Ko Olina?
A $886,000 home in Ko Olina, Hawaii costs approximately $6,133 per month with 20% down at 6.66%. That is $4,555 principal and interest, $186 property tax, $118 homeowners insurance, $535 utilities and $738 set aside for maintenance.
What is the property tax rate in Ko Olina?
Ko Olina has an effective property tax rate of 0.252%, based on a median home value of $885,500 and median real estate taxes of $2,234. That is lower than the Honolulu County average of 0.284%.
What is the average home price in Ko Olina?
The median owner-occupied home value in Ko Olina, Hawaii is $885,500, against $873,000 across Honolulu County.
Is it cheaper to rent or buy in Ko Olina?
Median gross rent in Ko Olina is $3,501 a month, against $6,133 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 Ko Olina — US Census Bureau, American Community Survey ACS 2023 5-Year, place-level tables.
- Homeowners insurance — NAIC average premium for Hawaii.
- 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.