Greenwich, CT Property Tax Rate: Exemptions, Payments, Appeals

The Greenwich CT property tax rate for fiscal year 2025–2026 is 12.041 mills, which means you pay $12.041 for every $1,000 of assessed value.¹ Connecticut law requires every town to assess property at 70% of its fair market value, so a home worth $1,000,000 carries an assessed value of $700,000 and an annual tax of roughly $8,429.² Greenwich’s rate is among the lowest in Connecticut, but the mill rate is likely to change for fiscal year 2026–2027 because a townwide revaluation of the 2025 Grand List is underway.

Calculating What You Owe

The formula is simple. Take your property’s assessed value, divide by 1,000, and multiply by the mill rate. That gives you the annual tax before any exemptions or credits.

For a home with a fair market value of $1,200,000 at the current 12.041 mill rate:

Assessed value: $1,200,000 × 70% = $840,000
Mill units: $840,000 ÷ 1,000 = 840
Annual tax: 840 × 12.041 = $10,114.44

This calculation covers real estate only. Greenwich applies the same 12.041 mill rate and 70% assessment ratio to motor vehicles and certain personal property, so your total obligation to the town may include separate vehicle bills.

How Greenwich Assesses Property Value

The Greenwich Assessor’s Office discovers, lists, and values all real estate, motor vehicles, and personal property in town.³ Every assessed value on the Grand List is 70% of what the Assessor considers the property’s present true and actual value.²

State law requires a full revaluation at least every five years so assessed values keep up with the market.⁴ The point is to redistribute the tax burden, not to raise more money overall: owners whose homes gained value pay a proportionate share, and owners whose values stagnated get relief.⁵ Greenwich last revalued for the 2021 Grand List and is now revaluing for the October 1, 2025 Grand List. When total assessed values rise, the Board of Estimate and Taxation typically lowers the mill rate to collect roughly the same revenue, so a higher assessment next year will not automatically mean a proportionally higher bill.

When Bills Are Due and How to Pay

Real estate taxes are billed in two installments, due July 1 and January 1. Motor vehicle taxes for vehicles registered as of October 1 are due in a single installment on July 1. A vehicle registered after October 1 but before August 1 of the following year generates a supplemental bill due the next January 1, prorated for the months it was registered.⁶ Bills are usually mailed in late June and list the Grand List year, bill number, and parcel or account ID you need to pay or look up the account online.⁷

You have three ways to pay:

Online through the town’s vendor, Point & Pay. Electronic fund transfers cost a flat $2.00 per transaction. Credit card, Apple Pay, and Google Pay carry a 2.50% convenience fee paid to the vendor.⁸
By mail to the Tax Collector at P.O. Box 3002, Greenwich, CT 06836-3002, with checks or money orders payable to “Town of Greenwich” and your bill number noted. The postmark date is what counts: if it falls within the payment window, the town cannot charge late interest.⁹
In person at the Tax Collector’s Office in Town Hall, 101 Field Point Road, Room 145, Monday through Friday from 8:30 AM to 3:30 PM. The office accepts checks, money orders, and cash.⁸

If your lender pays taxes from an escrow account, verify each year that the payment actually went through. Check your lender’s online portal for the disbursement and confirm your Greenwich tax account shows a zero balance after each due date. The responsibility for an unpaid bill rests with you, not the bank.

What a Late Payment Costs

Connecticut law charges 18% per year (1.5% per month) on any delinquent tax balance, running from the original due date until full payment, with a minimum of $2.00 per installment.⁹ Any fraction of a month counts as a full month, so being one day into a new month triggers the full 1.5%. Partial payments are applied to accrued interest first and principal second, so catching up slowly shrinks the balance less than you might expect.

Unpaid taxes also create an automatic lien on the property that takes priority over nearly all other claims, including mortgages. The lien attaches on October 1 of the assessment year and lasts two years initially, extendable by the tax collector for up to fifteen years. The town can ultimately foreclose to recover what is owed.

Exemptions and Credits That Lower the Bill

Greenwich offers several programs that reduce taxes for qualifying owners. Each has its own eligibility rules and filing deadlines, and missing the deadline is as disqualifying as missing the eligibility.¹⁰

Seniors

Residents age 65 or older who meet income guidelines can receive local or state tax credits. Applications are accepted between February 1 and May 15, and qualifying residents reapply every two years. You can reapply early if your income changes significantly between filings. Condominium and cooperative apartment owners qualify.¹⁰

Veterans

Veterans who served at least 90 days during a recognized wartime period, received an honorable discharge, and live in Greenwich qualify for an exemption on either real estate or a motor vehicle. File your DD-214 with the Town Clerk before October 1 to receive the benefit. Veterans with a VA disability rating of at least 10% receive an additional exemption. At the 100% disability level, the exemption is at least $10,500 if income is at or below $18,000 ($21,000 if married) and at least $5,250 above those income levels.¹⁰

Disability and Blindness

Residents receiving a Social Security disability pension can take a $1,000 reduction from their assessed value by filing a copy of the Social Security award letter with the Assessor’s Office before October 1. Individuals certified as legally blind by the Connecticut Board of Education and Services for the Blind qualify for a $3,000 assessment reduction under the same deadline.¹⁰

Active Military

Active-duty service members may have one passenger vehicle fully exempt from property tax. The exemption requires a letter from the commanding officer confirming the dates of active service, submitted annually by December 31.¹⁰

How to Appeal Your Assessment

If you believe the Assessor’s Office overvalued your property, file an appeal with Greenwich’s Board of Assessment Appeals. The deadline is February 20 at 5:00 PM for appeals from the most recent Grand List, and the appeal form must go directly to the Board rather than the Assessor’s Office.¹¹

Your written appeal must include a description of the property, your estimate of its correct value, and the reason you believe the assessment is too high.¹² The strongest appeals pair that argument with evidence: a recent independent appraisal, comparable sales from nearby properties, or documentation that the property’s condition does not match the Assessor’s records. If you cannot attend your hearing, you can send an authorized representative with a written letter of authorization.¹¹

One limit to know about: the Board may decline to hear appeals for commercial, industrial, utility, or apartment properties with an assessed value above $1,000,000. Owners of those properties can appeal directly to the Connecticut Superior Court, which involves litigation costs and legal representation.

1
Connecticut Data. Mill Rates for FY 2014-2026
2
Justia. Connecticut Code 12-62a – Uniform Fiscal Year. Uniform Assessment Date. Assessment at Seventy Per Cent
3
Greenwich, CT. Assessor
4
Justia. Connecticut Code 12-62 – Revaluation of Real Property
5
Town of Greenwich. Real Estate – Section: Revaluation
6
Greenwich, CT. Frequently Asked Questions – Supplemental Motor Vehicle Tax
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Town of Greenwich. Town of Greenwich – Tax Bills Search and Pay
8
Town of Greenwich. Tax Collector
9
Justia. Connecticut Code 12-146 – Delinquent Tax or Installment
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Greenwich, CT. Tax Credits and Benefits
11
Greenwich, CT. Board of Assessment Appeals
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Justia. Connecticut Code 12-111 – Appeals to Board of Assessment Appeals