Middlesex Property Tax: Rates, Deadlines & Appeal (2026)

For most Middlesex County homeowners, the 2026 regular assessment appeal deadline was April 1, 2026; if your municipality implemented a municipal-wide revaluation or reassessment, the deadline was May 1, 2026. Those 2026 dates have passed, so the next regular homeowner appeal deadline is expected to be April 1, 2027, unless your assessment notice gives you a later 45-day window.

File with the Middlesex County Board of Taxation, County Administration Building, 4th Floor, 75 Bayard Street, New Brunswick, NJ 08901. Middlesex does not participate in the state’s current NJ Appeal Online portal, and the county’s appeal page says there are no virtual tax appeal hearings. (nj.gov)

How assessments work in Middlesex County

Middlesex County property taxes are local: your municipal assessor sets the assessed value, your municipality collects the bill, and the money funds municipal, county and school budgets. The county tax board certifies assessments, equalizes values among the 25 municipalities, certifies tax rates, supervises municipal assessors, and hears assessment appeals. (middlesexcountynj.gov)

For a 2026 assessment, the key valuation date is October 1, 2025. New Jersey’s appeal guide says an assessment appeal is about the property’s true market value as of the October 1 pre-tax date—not about whether your tax bill feels high. If a town has just completed a revaluation, assessments should be at 100% of true market value; otherwise, the appeal system uses the town’s Chapter 123 “average ratio” and 15% common-level range. (nj.gov)

Middlesex’s own 2026 Chapter 123 worksheet tells homeowners to use comparable sales from 10/1/2024 through 9/30/2025 and to file only if comparable sales show the home is over-assessed. It also warned that 2026 ratios for Carteret, Dunellen, Highland Park, Middlesex Borough, Piscataway, and Plainsboro were subject to change. (middlesexcountynj.gov)

The 2026 Chapter 123 table shows very different ratios by town: for example, Edison is 29.69% with a lower limit of 25.24% and upper limit of 34.14%, while Woodbridge is 17.28% with a 14.69%–19.87% range. This is why Middlesex homeowners should not compare assessed values across towns. (nj.gov)

Whether you should appeal

Appeal if you can prove either: (1) the property record is wrong in a way that affects value, or (2) the assessment is too high compared with market sales. For single-family homes, the best evidence is usually 3 to 5 comparable sales of similar homes in the same municipality, closed before the October 1, 2025 valuation date. Comparable assessments are not acceptable evidence. (nj.gov)

Use the Chapter 123 math before filing. Example: an Edison home assessed at $200,000 has an implied 2026 market value of about $673,624 at Edison’s 29.69% ratio. But the appeal question is whether the assessment-to-market ratio exceeds Edison’s 34.14% upper limit. If three good Edison sales show the house was worth only $550,000 on October 1, 2025, the ratio is $200,000 ÷ $550,000 = 36.36%, which is above the range. A winning result would likely set the taxable assessment near $550,000 × 29.69% = $163,295, a reduction of $36,705. Using Edison’s latest official general tax rate table rate of 5.725 per $100 of assessed value—the state’s 2025 table; DCA’s 2026 property-tax table row was not yet populated in the page reviewed—the annual savings would be about $2,102 before any escrow adjustment. (nj.gov)

Do not assume the odds are either terrible or guaranteed. The latest state appeal statistics show 630 Middlesex County appeals in 2025: 86 assessments revised, 233 stipulated, 53 affirmed, 126 dismissed without prejudice, and 110 withdrawn. The state report does not publish a homeowner-only success rate or median reduction for Middlesex, so treat those as disposition counts, not a promise. (nj.gov)

Step-by-step how to file

1. Confirm the deadline. The regular rule is April 1, or 45 days after the bulk mailing of assessment notices, whichever is later. In a municipal-wide revaluation or reassessment year, the deadline is May 1. If the last day falls on a weekend or legal holiday, it moves to the next business day. For 2026, April 1 and May 1 both fell on weekdays. (nj.gov)

2. Download the official forms. Use Form A-1, Petition of Appeal for a regular assessment appeal. Use A-1 Comp. Sale, Comparable Sales Analysis Form to organize comparable sales. Use Form AA-1 only for an added/omitted assessment, such as new construction or an assessment that was left off and later billed. (nj.gov)

3. Prepare the copies. The A-1 instructions require the original petition to be filed with the county tax board, a copy served on the municipal assessor, a copy served on the municipal clerk, and a copy kept by you. Attach the same supporting documents to the county, assessor and clerk copies. (nj.gov)

4. File physically with Middlesex County. Official sources do not list email filing for Middlesex regular appeals, and Middlesex is not a member county in NJ Appeal Online. File by mail, courier, or in person so the original is received—not merely postmarked—by the deadline at: Middlesex County Board of Taxation, County Administration Building, 4th Floor, 75 Bayard Street, New Brunswick, NJ 08901. Office hours are Monday–Friday, 8:30 a.m.–4:15 p.m. (nj.gov)

5. Include the filing fee. The fee is based on assessed value: $5 if under $150,000; $25 if $150,000 to under $500,000; $100 if $500,000 to under $1,000,000; $150 if $1,000,000 or more. Classification-only appeals are $25; checks are payable to County Tax Administrator and are non-refundable. No fee is required to appeal denial of senior/disabled or veteran deductions listed in the form instructions. (nj.gov)

6. Stay current on taxes. You generally must have paid all taxes and municipal charges due through the first quarter of the current year, unless the board relaxes that requirement. (nj.gov)

What happens after

Middlesex scheduled 2026 regular appeal hearings at Middlesex College – Crabiel Hall, with hearing dates by municipality on May 7, May 14, June 5, and June 11, 2026. The county’s 2026 schedule lists which towns were assigned to each date. (middlesexcountynj.gov)

At the hearing, the board decides value from the evidence. You or your New Jersey attorney must appear unless you chose the summary hearing option on Form A-1, which asks the board to decide from the submitted papers only. If you submit an appraisal, the appraiser must appear to testify. Evidence not attached to the petition—comparable sales, appraisal reports, photos or other proof—must reach the board and the opposing party at least 7 calendar days before the hearing. (nj.gov)

By law, the tax board must hear and determine appeals within 3 months of the last filing day. If you disagree with the judgment, you have 45 days from the judgment mailing date to file a Tax Court complaint. If your assessment is over $1,000,000, you may file directly in Tax Court instead of the county board. (nj.gov)

Local tips

First, look up your property record and sales through the Middlesex County property assessment/sales search linked from the county tax appeal page. Compare your home with nearby sales in your municipality, not with homes in another Middlesex town. (middlesexcountynj.gov)

Second, check relief programs even if an appeal is not worth it. New Jersey now combines Senior Freeze, ANCHOR and Stay NJ information through the state property-tax relief application process, with the 2025 application deadline listed as November 2, 2026. Also ask your municipal assessor or collector about the $250 senior/disabled deduction, the $250 veteran deduction, and the 100% disabled veteran exemption where applicable. These are not substitutes for an assessment appeal, but they may reduce the bill or provide a rebate. (nj.gov)

Finally, remember the practical risk: a municipality may cross-appeal your assessment. File when your evidence is strong enough that, if the assessor challenges your number, you can defend it with real market data—not just a lower estimate from an online home-value site. (nj.gov)

Middlesex County Property Tax Rate

No single countywide homeowner property-tax rate is stated for Middlesex County. New Jersey’s official 2025 General Tax Rates table lists rates by Middlesex County municipality; general tax rates range from 1.568 to 12.177 per $100 of assessed value, and effective tax rates range from 1.454% to 2.802%, depending on the municipality.

Source: https://nj.gov/treasury/taxation/pdf/lpt/gtr/2025taxrates.pdf

When Are Property Taxes Due in Middlesex County?

Statutory New Jersey property-tax installments are due quarterly: February 1, May 1, August 1, and November 1. Four installments: first due February 1, second due May 1, third due August 1, fourth due November 1; Middlesex County states property-tax payments are collected at the municipal level, so homeowners should confirm any local grace period or bill-specific payment date with the municipal tax collector.

This is not the same as the assessment appeal deadline above. The appeal deadline is your window to contest your assessed value; the payment due date is when the resulting tax bill must be paid. Missing one does not affect the other, but missing either has real consequences — one forfeits your right to appeal for the year, the other can trigger penalties and interest.

Source: https://www.nj.gov/dca/dlgs/programs/tax_collector_docs/guidetocalcesttaxes.pdf

Property Tax Exemptions in Middlesex County

• $250 Property Tax Deduction for Senior Citizens and Disabled Persons — Homeowners age 65 or older, or disabled homeowners, who meet the applicable New Jersey income and residency requirements; administered by the local municipality.. Annual deduction of up to $250 from property taxes. Yes; file the claim with the municipal assessor/collector, with post-tax-year income confirmation as applicable. Apply by December 31 for the current tax year; applications for the following tax year may be filed with the assessor during the pretax year.. (Source: https://www.nj.gov/treasury/taxation/otherptr.shtml)
• $250 Veteran Property Tax Deduction — Qualified war veterans or veterans who served in peacekeeping missions and operations; also available to an un-remarried surviving spouse/civil union/domestic partner where eligible; administered by the local municipality.. Annual deduction of up to $250 from property taxes due. Yes; file the veterans deduction claim with the municipal assessor/collector. Apply by December 31 for the current tax year; applications for the following tax year may be filed with the assessor during the pretax year.. (Source: https://www.nj.gov/treasury/taxation/otherptr.shtml)
• 100% Disabled Veteran Property Tax Exemption — Certain totally and permanently disabled war veterans and veterans who served in peacekeeping missions and operations for their principal residence; also available to an un-remarried surviving spouse/civil union/domestic partner where eligible; administered by the local municipality.. Full exemption from property taxes on the principal residence. Yes; file the disabled veteran dwelling exemption claim with the municipal assessor/collector. (Source: https://www.nj.gov/treasury/taxation/otherptr.shtml)
• Senior Freeze / Property Tax Reimbursement — For the 2025 application, homeowners who were 65 or older by December 31, 2025, or actually receiving federal Social Security/Railroad Retirement disability benefits by that date; owned and lived in the home since December 31, 2022 or earlier; met the 2024 and 2025 income limits; and met the other program rules.. Reimburses the increase between current-year property taxes billed and the taxpayer’s base-year property taxes billed, if current-year taxes are higher; total property-tax relief cannot exceed property taxes paid for the same year. Yes; file the combined Property Tax Relief application, Form PAS-1. Apply by 2026-11-02. (Source: https://www.nj.gov/treasury/taxation/ptr/eligibility.shtml)
• ANCHOR Program — For the 2025 benefit year, New Jersey homeowners who owned and occupied a main home and had New Jersey gross income of $250,000 or less; renters may qualify under separate rules, but this guide is focused on homeowners.. Homeowner benefit is $1,500 for 2025 NJ gross income of $150,000 or less, or $1,000 for income of $150,001–$250,000; benefit is subject to overall property-tax-relief caps. Yes for seniors and Social Security/Railroad Retirement disability recipients via Form PAS-1; many under-65 filers may be auto-filed but may need to file if not auto-filed. Apply by 2026-11-02. (Source: https://www.nj.gov/treasury/taxation/anchor/calculated.shtml)
• Stay NJ Property Tax Credit Program — For the 2025 tax-year application, New Jersey homeowners age 65 or older who owned and lived in the home for all 12 months of 2025, resided in a home subject to property taxes or PILOT, and had income not exceeding $200,000; renters and mobile home owners are not eligible.. For 2027 payments based on the 2025 tax-year application, the maximum annualized benefit is $6,500 for income of $0–$100,000, $5,000 for $100,000.01–$150,000, $4,000 for $150,000.01–$200,000, and $0 over $200,000. Yes; file Form PAS-1 to claim Senior Freeze, ANCHOR, and Stay NJ benefits as applicable. Apply by 2026-11-02. (Source: https://www.nj.gov/treasury/taxation/staynj/index.shtml)

How to Look Up Your Property Record in Middlesex County

You can look up your property's official record at https://www.middlesexcountynj.gov/government/departments/department-of-finance/board-of-taxation. The Middlesex County Office of Tax Board page provides the county’s official access point to property records formerly available through NJACTB and to county property assessment and sales search resources.