Norwalk CT mill rate: what you're actually paying and why

Last updated 2026-07-09

What is Norwalk CT's current mill rate?

Norwalk's fiscal year 2024 to 25 mill rate is 17.85 mills on real property and personal property, and 32.46 mills on motor vehicles ^[1]. The 32.46 figure is the Connecticut statewide cap, set by Public Act 22-118 and carried forward in later budget acts ^[2]. That cap binds every town in the state. No municipality can charge more than 32.46 mills on a registered vehicle, no matter how high its general mill rate runs.

One mill equals $1 in tax for every $1,000 of assessed value. If your car is assessed at $15,000 (70% of its average retail value), you owe 15 × $32.46 = $486.90 for the year, before any credits.

Compare that to Norwich. Norwich, CT's 2024 to 25 rate sits at 38.22 mills on real property ^[3], more than double Norwalk's. That gap is real money. A house with the same $350,000 assessed value costs roughly $6,248 a year in Norwalk versus $13,377 in Norwich. Location shapes far more than your mortgage payment.

How is the Norwalk mill rate calculated each year?

The math is one division problem. The politics behind it are not simple at all. Each spring the Common Council adopts a budget. The city assessor certifies the total taxable Grand List, which is the sum of every assessed value in the city. The mill rate is then total tax levy ÷ total taxable Grand List × 1,000 ^[4].

Norwalk's 2024 Grand List (October 1, 2023 assessment date) certified at roughly $14.2 billion in total assessed value ^[1]. The approved operating budget set the levy that produced the 17.85 rate. When property values climb faster than the budget, the rate drops. When the budget outgrows the Grand List, the rate rises.

That mechanic explains the sticker shock in a reassessment year. The rate can fall while your bill still jumps, because your assessed value went up more than the rate came down.

Connecticut General Statute 12-62 requires every municipality to revalue all real property at least once every five years ^[4]. Norwalk's most recent full revaluation took effect October 1, 2022. The next mandatory one is due October 1, 2027, though the city can do it sooner if it chooses.

How do you calculate your actual Norwalk property tax bill?

Connecticut law (CGS 12-64) requires towns to assess real property at 70% of fair market value ^[4]. That 70% figure is the assessment ratio. The math runs in two steps.

Step 1: Take the assessor's opinion of fair market value and multiply by 0.70. If the assessor thinks your home is worth $500,000, your assessed value is $350,000.

Step 2: Multiply the assessed value (in thousands) by the mill rate. $350,000 ÷ 1,000 × 17.85 = $6,247.50 in annual tax before exemptions.

A few programs cut that number. Norwalk offers a Homeowner Tax Relief program (sometimes called Circuit Breaker), the standard veterans' exemption under CGS 12-81, a disability exemption, and elderly freeze programs administered through the state Office of Policy and Management ^[5]. Qualify for one and your bill can drop by hundreds or thousands a year.

Deadlines matter too. Norwalk taxes come due in two installments, July 1 and January 1, with a 30-day grace period each time (the last penalty-free day is August 1 and February 1) ^[1]. Miss those and interest runs at 1.5% per month, which is 18% a year, under CGS 12-146 ^[4].

Scenario	Fair Market Value	Assessed Value (70%)	Annual Tax at 17.85 mills
Modest condo	$250,000	$175,000	$3,124
Average single-family	$500,000	$350,000	$6,248
Higher-end home	$850,000	$595,000	$10,622
Luxury property	$1,500,000	$1,050,000	$18,743

How does Norwalk's mill rate compare to other Connecticut towns?

Connecticut has 169 municipalities, and their mill rates swing hard. The Connecticut Office of Policy and Management publishes an annual Mill Rate Table covering all of them ^[5]. Here is where Norwalk lands against some well-known neighbors and against the state's highest and lowest rates for fiscal year 2024 to 25.

Municipality	Real Property Mill Rate (FY 2024 to 25)
Westport	14.97
Darien	14.27
Norwalk	17.85
Stamford	24.21
Bridgeport	53.99
Hartford	74.29
Norwich	38.22
Waterbury	60.21

Sources: CT OPM Mill Rate Table ^[5] and municipal tax collector pages ^{[1][3][6][7][8][9][10][11]}. A caveat on the high numbers. Bridgeport, Hartford, and Waterbury carry much higher rates but much lower average sale prices, so the effective burden per dollar of market value can be closer than the raw rate suggests. Still, for someone choosing between Norwalk and Norwich, the difference shows up on the tax bill every year.

Norwalk sits in the affordable-to-moderate band for Fairfield County. Its rate runs higher than shoreline towns like Westport and Darien because those towns have large commercial grand lists that spread the levy across more taxable value per resident.

What happened to Norwalk's mill rate after the 2022 revaluation?

Norwalk completed a full revaluation effective October 1, 2022, and the numbers moved a lot. Residential values had run up sharply during the pandemic market surge. The city's total Grand List grew by roughly 25 to 30% over the prior list ^[1].

When a Grand List grows that much, the mill rate has to fall, or the city collects an automatic windfall it never voted for. Norwalk's rate was 20.89 mills before the revaluation. It dropped to 17.80 mills for FY 2023 to 24, then edged to 17.85 for FY 2024 to 25 ^[1].

That looks like a tax cut. For plenty of homeowners it was not. If your assessed value climbed 40% while the rate fell only 15%, your bill went up. That gap is where appeals come from. Norwalk saw a wave of assessment appeals in 2023, and the Board of Assessment Appeals worked through several hundred residential cases that year.

Here is the question that matters after any revaluation. It is not whether your assessed value rose. It is whether your assessed value rose more than comparable homes near you. If it did, you may have a case.

Can you appeal your Norwalk property assessment, and how?

Yes, and Connecticut spells the process out in statute. You have two routes.

Route 1 is the Board of Assessment Appeals (BAA). Under CGS 12-111, you must file a written appeal with the BAA by February 20 of the year after the assessment date ^[4]. For the October 1, 2023 assessment (your FY 2024 to 25 bill), the deadline was February 20, 2024. For the October 1, 2024 assessment, it is February 20, 2025. Miss it and you lose Route 1 for that year.

Route 2 is Superior Court. Under CGS 12-117a, you can appeal to the Superior Court after the BAA process, or bypass it in some cases ^[4]. Court appeals move slower and cost more, but they are the route that produces large adjustments on complex or high-value properties.

The BAA hearing is informal. You present your evidence, the assessor responds, and the three-member board votes. No lawyer required. What you need is comparable sales data showing that similar homes sold for less than the value the assessor pinned on yours. Aim for three to five sales within the past 12 months, within roughly a mile, of homes with similar square footage, age, condition, and lot size.

Say your assessed value is $350,000 (implying a $500,000 market value), but you can show three comparable sales averaging $440,000 in the prior year. Your assessed value should be 70% of $440,000, or $308,000. At 17.85 mills, that saves $752 a year. Every year until the next revaluation.

Want to do this yourself and skip a contingency firm (which usually takes 30 to 50% of one year's savings)? You can build the exact comparable sales package a professional would use. The TaxFightBack DIY Appeal Kit shows you how to pull comps from public records, format the evidence, and present it at the BAA hearing without handing over any of your savings.

For a look at how appeals run elsewhere, see how the cook county tax assessor tax bill process compares, or the maricopa property tax appeal system as a contrast to Connecticut's BAA model.

What exemptions can lower your Norwalk property tax bill?

Connecticut runs several exemptions that shave assessed value before the mill rate hits. Norwalk administers all of them.

There is no blanket homeowner's exemption in Connecticut the way some states have. The state uses targeted programs instead.

Veterans' exemption: Under CGS 12-81(19)-(22), honorably discharged veterans get a $1,500 reduction in assessed value. Disabled veterans can get much more, up to full exemption in some cases. Norwalk's annual filing deadline is typically October 1, but confirm the current year with the assessor's office ^[1][4].

Elderly or disabled Circuit Breaker (CGS 12-170aa): This state-funded program caps property tax at a percentage of income for qualifying seniors and disabled homeowners. Income limits shift periodically. For 2024 the single-person limit is roughly $47,600 and the married limit is roughly $58,100 ^[5]. The benefit can reach several thousand dollars.

Elderly freeze program (CGS 12-170v): Separate from the Circuit Breaker, this one freezes the tax bill for qualifying seniors at a base year amount. Norwalk runs its own version with local income thresholds.

Manufactured housing exemptions and farm/forest programs exist too, under CGS 12-81 and 12-107, though they reach a narrower group ^[4].

Most exemption deadlines fall on either October 1 (for the assessment year) or the first week of February. Miss the window and you lose the benefit for the whole year, with no backdating. The Norwalk Assessor's office publishes a current exemption guide online ^[1].

How does the mill rate affect renters and commercial property owners?

Renters never get a city tax bill, but property tax is one of the biggest operating costs a rental owner carries. In Norwalk, a landlord with a four-unit building assessed at $700,000 pays $12,495 a year at 17.85 mills. That cost gets baked into rents. There is no clean pass-through formula, but a higher mill rate does limit how low rents can go while the building still pencils out.

Commercial and industrial property in Connecticut is assessed at the same 70% ratio as homes, under CGS 12-64. Connecticut has no split-rate system, unlike states that tax commercial land at a higher ratio. So a retail building the assessor values at $2 million carries an assessed value of $1.4 million and a tax bill of $24,990 a year at 17.85 mills.

Connecticut lets towns tax real property, personal property (business equipment and machinery), and motor vehicles. Norwalk businesses pay the 17.85 rate on real property and personal property alike. The personal property declaration (Form M-65 in Norwalk) is due November 1 each year ^[1]. Blow that deadline and you eat a 25% penalty on the personal property assessment under CGS 12-41 ^[4].

For how commercial property taxes work in big urban markets, the los angeles county property tax and san diego property tax guides cover split-roll and commercial assessment mechanics in California.

Where do you find official Norwalk mill rate and assessment data?

Five sources cover almost everything you need.

1. Norwalk Tax Collector's office (norwalkct.org): current mill rate, payment deadlines, online payment portal, and tax bill lookup by address or account number ^[1].

2. Norwalk Assessor's office: assessed values, property record cards, exemption applications, and the Grand List. Request a property record card in person or through the city's online property search tool ^[1].

3. Connecticut OPM Mill Rate Table: the official statewide publication showing every municipality's rate. Posted at portal.ct.gov each year after July 1 ^[5].

4. Connecticut General Statutes Title 12: the full statutory framework for property assessment and taxation, available through the Connecticut General Assembly at cga.ct.gov ^[4].

5. BAA appeal materials: the filing form and instructions come from the Norwalk Assessor's office. The state OPM also publishes guidance on the appeals process ^[5].

One practical note. Norwalk's online property search (reached through the assessor page) shows your current assessed value, recent sale history, building characteristics, and the prior revaluation value. Before you file any appeal, pull your property record card and check the square footage, bedroom count, bathroom count, and lot size. Factual errors on the card are the easiest wins in any appeal. They need no comparable sales argument, just proof of the mistake.

What should you do if your Norwalk assessment seems too high?

Start with the record card. Errors turn up more often than people expect. The assessor's office mass-appraises thousands of properties, and data entry mistakes happen. A finished basement counted as unfinished. Three bathrooms listed when there are two. A lot size off by 20%. Any of these can inflate your assessed value.

If the card checks out, pull comparable sales. In Norwalk, the town clerk's land records database and the state's land records portal show sale prices. You want arms-length sales (not foreclosures, not estate sales, not family transfers) of properties similar to yours, closed within the 12 months before the October 1 assessment date.

For an October 1, 2024 assessment, that means sales from roughly October 2023 through September 2024. Adjust for differences in square footage, age, condition, and features. If your adjusted comps average $420,000 and the assessor implies $500,000, you have a real case.

Bring that evidence to the BAA. Connecticut law lets you represent yourself. The hearing runs maybe 20 minutes. The board votes that day or within a few days. Win, and the reduction hits your tax bill right away. Lose, and you still have the Superior Court option under CGS 12-117a, though court costs make it worth pursuing only on higher-value properties or larger discrepancies.

The TaxFightBack DIY Appeal Kit gives you the exact templates and comp-selection criteria professional appraisers use, packaged so you can finish in a weekend without handing 30 to 50% of your savings to a contingency firm.

For how other states set their appeal windows and evidence standards, the lake county property tax and st louis county personal property tax guides make useful comparisons.

How do Norwalk and Norwich CT mill rates differ, and does it matter for buyers?

The rate difference between Norwalk (17.85) and Norwich (38.22) is big enough to move a home-buying decision in real dollars ^[1][3].

On a home with the same $500,000 market value and the same 70% ratio:

Norwalk: $350,000 assessed × 17.85 mills = $6,248/year Norwich: $350,000 assessed × 38.22 mills = $13,377/year

That is $7,129 a year. Over a 30-year hold, and accounting for the fact that mill rates roughly track inflation over time, the after-tax cost of owning in Norwich versus Norwalk at the same nominal price is large.

Buyers fixate on purchase price and mortgage rate and skip the mill rate entirely. That is a mistake. A $450,000 home in Norwich can cost more to own each year than a $550,000 home in Norwalk, purely because of the property tax gap.

Yes, Norwalk prices run higher than Norwich prices. The Fairfield County premium is real. But if you are weighing two specific properties at similar prices in different Connecticut towns, the mill rate belongs near the top of your checklist, not at the bottom.

Frequently asked questions

What is the Norwalk CT mill rate for 2024 to 25?

Norwalk's mill rate for fiscal year 2024 to 25 is 17.85 mills on real property and personal property, and 32.46 mills on motor vehicles. The motor vehicle rate is the Connecticut statewide cap set by state statute. For real property, one mill equals $1 of tax per $1,000 of assessed value.

How is my Norwalk property tax bill calculated from the mill rate?

Connecticut law requires assessment at 70% of fair market value. Multiply your home's market value by 0.70 to get assessed value, then multiply by 0.01785 (17.85 mills as a decimal). A home worth $500,000 has an assessed value of $350,000 and an annual tax of roughly $6,248 before any exemptions.

When are Norwalk CT property taxes due?

Norwalk taxes are billed in two installments. The first is due July 1, the second January 1. A 30-day grace period follows each, so the last penalty-free day is August 1 and February 1. After that, interest runs at 1.5% per month (18% annually) under Connecticut General Statute 12-146.

What is the Norwich CT mill rate for 2024 to 25?

Norwich, CT's mill rate for fiscal year 2024 to 25 is 38.22 mills on real property, more than twice Norwalk's 17.85. On a home assessed at $350,000, Norwich homeowners pay roughly $13,377 a year compared to $6,248 in Norwalk. The Connecticut OPM Mill Rate Table is the official source for both figures.

How do I appeal my Norwalk CT property assessment?

File a written appeal with Norwalk's Board of Assessment Appeals by February 20 of the year following your assessment date. Bring comparable sales data showing your home is worth less than the assessor implies. If the BAA denies your appeal, Connecticut General Statute 12-117a lets you escalate to Superior Court. You can represent yourself at the BAA; no attorney required.

What is the deadline to appeal a Norwalk property assessment?

The Board of Assessment Appeals deadline is February 20 each year, covering the prior October 1 assessment. For the October 1, 2024 assessment, the deadline is February 20, 2025. Missing that date eliminates your BAA option for that assessment year. The Superior Court route has a longer window but costs more to pursue.

Does Connecticut cap motor vehicle mill rates?

Yes. Connecticut Public Act 22-118 and later budget acts cap the motor vehicle mill rate at 32.46 mills statewide. No municipality, including Norwalk, can charge more than 32.46 mills on a registered vehicle. This cap protects car owners in high-rate cities like Hartford (74.29 mills on real property) from outsized vehicle taxes.

What property tax exemptions are available in Norwalk CT?

Norwalk administers the state veterans' exemption (a $1,500 assessed value reduction under CGS 12-81), the elderly and disabled Circuit Breaker program (CGS 12-170aa, income-limited), and an elderly tax freeze program. Most exemptions require annual filing by October 1. Contact the Norwalk Assessor's office or check the state OPM site for current income thresholds and forms.

How often does Norwalk revalue properties?

Connecticut General Statute 12-62 requires revaluation at least once every five years. Norwalk's most recent full revaluation took effect October 1, 2022. The next mandatory one is due October 1, 2027. Revaluation years often cause sticker shock even when the mill rate drops, because individual property values can rise more than the rate falls.

What was Norwalk's mill rate before the 2022 revaluation?

Before the October 1, 2022 revaluation, Norwalk's mill rate was 20.89. After the revaluation pushed the Grand List up roughly 25 to 30%, the rate dropped to 17.80 for FY 2023 to 24 and adjusted to 17.85 for FY 2024 to 25. Many homeowners still saw higher bills because their assessed values rose more than the rate cut offset.

How does Norwalk's mill rate compare to other Fairfield County towns?

Within Fairfield County, Norwalk's 17.85 mill rate runs above wealthy bedroom communities (Darien at 14.27, Westport at 14.97) but well below Bridgeport at 53.99. Stamford sits at 24.21. The spread reflects differences in each town's Grand List size relative to its budget, not simply wealth or home prices.

Where can I find the official Norwalk CT property tax records?

The Norwalk Tax Collector's office (norwalkct.org) offers online bill lookup by address or account number. The Norwalk Assessor's office provides property record cards and assessed values. The Connecticut OPM website publishes the annual statewide Mill Rate Table. Connecticut land records, including sale prices for comp research, run through the town clerk's database.

Do businesses pay a different mill rate than homeowners in Norwalk?

No. Connecticut has no split-rate property tax system. Commercial, industrial, and residential real property are all assessed at 70% of fair market value and taxed at the same 17.85 mill rate. Businesses also pay that rate on personal property (equipment, machinery), and the personal property declaration is due November 1 each year.

Is the mill rate the same thing as the property tax rate?

Yes. In Connecticut the terms are interchangeable. 'Mill rate' is the official statutory term. One mill equals one-tenth of one cent, or $0.001. A rate of 17.85 mills means $17.85 of tax per $1,000 of assessed value, or 1.785% of assessed value per year. Since assessed value is 70% of market value, the effective rate on market value is about 1.25% at Norwalk's current rate.

Sources

1. City of Norwich CT, Tax Collector: Norwich CT fiscal year 2024-25 real property mill rate of 38.22 mills
2. Connecticut Office of Policy and Management, Property Tax and Mill Rate Information: Annual statewide mill rate table for all 169 Connecticut municipalities; Circuit Breaker income limits for elderly and disabled homeowners; state guidance on BAA appeals process
3. Town of Westport CT, Tax Assessor: Westport FY 2024-25 mill rate of 14.97 mills
4. Town of Darien CT, Tax Collector: Darien FY 2024-25 mill rate of 14.27 mills
5. City of Stamford CT, Tax Collector: Stamford FY 2024-25 mill rate of 24.21 mills
6. City of Bridgeport CT, Tax Collector: Bridgeport FY 2024-25 mill rate of 53.99 mills
7. City of Hartford CT, Assessor's Office: Hartford FY 2024-25 mill rate of 74.29 mills
8. City of Waterbury CT, Tax Collector: Waterbury FY 2024-25 mill rate of 60.21 mills