Total monthly cost of ownership
Cost to Own a Home in Williamstown, New Jersey
A $255,000 home here costs
$2,447per month, all in — with 20% down at today's 6.66% 30-year fixed rate.
A standard mortgage calculator would have told you $1,311. The real number is $1,136 higher every month — 87% 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.
Williamstown against Gloucester County and New Jersey
| Measure | Williamstown | Gloucester County |
|---|---|---|
| Median home value | $255,000 | $283,500 |
| Median property tax | $7,011 | $7,964 |
| Effective tax rate | 2.749% | 2.809% |
| Median gross rent | $1,262 | $1,480 |
| Population | 14,855 | 304,504 |
The weather behind that power bill
Williamstown sits in Gloucester County, which averages a high of 87.8°F in its hottest month and a low of 26.0°F in its coldest, with 44.11" of precipitation a year and 30% of it in a single three-month stretch. That climate drives 1,358 cooling and 4,510 heating degree days, which is what sets the $209 electricity line above.
See the full climate breakdown for Gloucester County — month by month temperatures, rainy season timing, snowfall and heating and cooling costs.
Other cities in Gloucester County
Full Gloucester County cost breakdown · Every county in New Jersey
Common questions
How much does it cost to own a home in Williamstown?
A $255,000 home in Williamstown, New Jersey costs approximately $2,447 per month with 20% down at 6.66%. That is $1,311 principal and interest, $584 property tax, $62 homeowners insurance, $277 utilities and $213 set aside for maintenance.
What is the property tax rate in Williamstown?
Williamstown has an effective property tax rate of 2.749%, based on a median home value of $255,000 and median real estate taxes of $7,011. That is lower than the Gloucester County average of 2.809%.
What is the average home price in Williamstown?
The median owner-occupied home value in Williamstown, New Jersey is $255,000, against $283,500 across Gloucester County.
Is it cheaper to rent or buy in Williamstown?
Median gross rent in Williamstown is $1,262 a month, against $2,447 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 Williamstown — US Census Bureau, American Community Survey ACS 2023 5-Year, place-level tables.
- Homeowners insurance — NAIC average premium for New Jersey.
- 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.