South Plainfield Borough property taxes
Middlesex County, New Jersey · population 24,338
Typical home tax bill
- 20
- 21
- 22
- 23
- 24
- 25
Median of 6,807 homes (residential lots) in the state's assessment records. The tax rate is up 15.3% since 2020.
Assessments
The town's average assessment ratio for 2026.
An assessment from 22.59% to 30.57% of a home's value is inside the state's allowed range. Above that, an appeal can bring it down.
Is your assessment too high?
New Jersey checks your assessment against the town's average ratio (26.58% for 2026). If your assessment is more than 30.57% of your home's value, you may have an appeal case.
Appeal deadline
April 1, 2027 (May 1, 2027 if South Plainfield Borough does a town-wide revaluation for 2027), or 45 days after assessment notices are mailed if that's later.
File with the Middlesex County Board of Taxation. The petition has to arrive by the deadline; a postmark isn't enough. Homes assessed over $1 million can go straight to the Tax Court.
Questions
What is the average property tax bill in South Plainfield Borough?
The typical (median) South Plainfield Borough home paid $8,190 in property taxes in 2024, based on 6,807 homes in New Jersey's assessment records. Half of homes paid more and half paid less.
What is the property tax rate in South Plainfield Borough?
The 2025 general tax rate is 7.316 per $100 of assessed value, up 4.8% from 2024. Your bill is your assessment divided by 100, times the rate. Compare towns by bills, not rates, because towns assess at different levels.
Is South Plainfield Borough assessed at full market value?
No. For 2026 the state puts South Plainfield Borough's average assessment at 26.58% of market value. Divide your assessment by 0.2658 to see the market value the town is assuming for your home.
When is the property tax appeal deadline in South Plainfield Borough?
The next deadline is April 1, 2027, or 45 days after assessment notices are mailed if that is later. If South Plainfield Borough does a town-wide revaluation for 2027, it moves to May 1, 2027. The petition has to be received by the Middlesex County Board of Taxation, not just postmarked.
How can South Plainfield Borough homeowners lower their property taxes?
Check that your assessment isn't too high (the checker on this page does the math), and apply for New Jersey's relief programs: ANCHOR for homeowners and renters, Stay NJ for seniors 65 and older, and the Senior Freeze. Watchdog's free benefit estimator shows which ones fit.
Property tax relief
- ANCHORA yearly benefit for New Jersey homeowners and renters under the income limits.
- Stay NJHomeowners 65 and older can get up to half of the bill back, up to a cap.
- Senior FreezePays back increases for eligible seniors and people with disabilities.
- Stack themSee how the programs work together for one household.
Buying or selling in South Plainfield Borough?
- True cost of a homeThe monthly cost of any address, with its real tax bill.
- South Plainfield Borough CO requirementsResale Certificate of Occupancy and smoke/CO alarm rules, fees and timing.
- Appeal savings estimatorWhat a lower assessment would save each year.
Real estate agent? Copy this page's link for buyers and sellers in South Plainfield Borough.
Nearby towns
- Plainfield City$9,186 typical bill
- Dunellen Borough$10,850 typical bill
- Piscataway Township$8,136 typical bill
- North Plainfield Borough$10,235 typical bill
- Metuchen Borough$12,453 typical bill
- Green Brook Township$12,454 typical bill
- Scotch Plains Township$13,074 typical bill
- Middlesex Borough$9,667 typical bill
Sources: typical bills and assessments are medians of residential lots in New Jersey's MOD-IV assessment records (2024 bills). Tax rates: NJ Division of Taxation, General Tax Rates by County and Municipality. Assessment ratios: NJ Division of Taxation, 2026 Chapter 123 ratios. Revaluations: 2026 approved revaluations and reassessments. This page is general information, not legal or tax advice.