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Updated 2025 Tax Year

Northwest Hills County
Property Tax Guide

Everything you need to know about property taxes in Northwest Hills County, CT. Rates, due dates, exemptions, and how it affects your monthly payment.

10 Official Sources
8 min read
Quick Facts
Tax Rate
12.75 mills (1.275%) for 2024-25, increasing to 18.8976 mills (1.89976%) for 2026, varies by municipality
Exemptions
5+ Available
Section 1

How Property Tax Works

Northwest Hills County, Connecticut operates under the state's property tax system, which serves as the primary funding mechanism for local services including education, public safety, infrastructure maintenance, and municipal operations. Property taxes in Northwest Hills County are administered at the local level, with the county serving as part of the Northwest Hills Council of Governments region.

The effective property tax rate in Northwest Hills County varies by specific municipality and special taxing districts within the county boundaries. For the 2024-2025 fiscal year, the mill rate is 12.75 mills (1.275%), while the projected rate for 2026 increases to 18.8976 mills (1.89976%). Property owners should note that actual tax rates can vary significantly based on their specific location within the county due to different municipal services, school district funding needs, and special assessment districts for services like fire protection, lighting districts, or infrastructure improvements.

Section 2

What Makes Up Your Tax Bill

ComponentRate (Mills)Description
Base Municipal Rate12.75FY 2024-2025 general municipal services
Projected Rate 202618.90FY 2026 anticipated rate increase
School DistrictVariesIncluded in base rate, varies by district
Special DistrictsVariesFire, lighting, infrastructure districts

Fiscal Year: These rates apply to the 2024-2025 and 2026 tax levy years respectively. Mill rates are expressed as dollars per $1,000 of assessed value. Special taxing districts within Northwest Hills County may impose additional assessments that vary by location, so property owners should verify their total applicable rate with their local tax assessor's office.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Northwest Hills County, property taxes are due in two installments:

Pro tip: If you pay through mortgage escrow, your lender splits these payments across your monthly mortgage. If you pay directly, set calendar reminders to avoid late penalties.
Section 4

Supplemental Tax Bills

Supplemental taxes in Northwest Hills County are triggered by changes in property ownership, new construction, or significant improvements that alter the assessed value during the tax year. When a property changes hands or undergoes substantial improvements, the tax assessor may issue a supplemental assessment to capture the difference between the previous assessment and the current market value.

For example, if a property was assessed at $400,000 in January but sold for $500,000 in June, a supplemental tax bill would be calculated on the $100,000 difference, prorated for the remaining months of the fiscal year. The supplemental tax would be approximately $1,275 (using the 12.75 mill rate) × 6/12 months = $637.50. These supplemental bills are typically issued within 60 days of the triggering event and have separate due dates from regular property tax bills.

Example Calculation

$300,000 Property:

  • Assessed Value: $300,000
  • Applicable Credits: $0 (assuming no applications filed)
  • Net Taxable Value: $300,000
  • Tax Rate: 12.75 mills
  • Annual Tax: $3,825
  • Monthly Escrow: $319

$600,000 Property:

  • Assessed Value: $600,000
  • Applicable Credits: $0 (credits require application)
  • Net Taxable Value: $600,000
  • Tax Rate: 12.75 mills
  • Annual Tax: $7,650
  • Monthly Escrow: $638

$1,000,000 Property:

  • Assessed Value: $1,000,000
  • Applicable Credits: $0 (no automatic credits)
  • Net Taxable Value: $1,000,000
  • Tax Rate: 12.75 mills
  • Annual Tax: $12,750
  • Monthly Escrow: $1,063

Note: These calculations assume no tax credits have been applied. Most credits require annual application and approval by the assessor's office.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Northwest Hills County require property tax escrow accounts to ensure timely payment of property taxes. Your monthly mortgage payment includes principal, interest, and an escrow portion that covers property taxes and insurance premiums. Lenders typically collect 1/12th of your annual property tax bill each month, plus a cushion of up to two months' worth of taxes.

Property tax bills in Northwest Hills County are due November 15th annually, with statements mailed before October 25th. Lenders receive these bills directly and make payments on your behalf from your escrow account. If your escrow account has insufficient funds due to tax increases or assessment changes, your lender will conduct an escrow analysis and may increase your monthly payment or require a lump sum to cover the shortage. Property owners should verify that their lender has received and paid their tax bills, as ultimate responsibility remains with the property owner even when using escrow services.

How HonestCasa Helps
  • Understand whether your escrow is set correctly
  • See how rising taxes will change your monthly payment
  • Plan ahead instead of being surprised by "shortage" letters
Section 6

Frequently Asked Questions

Q: When are property taxes due in Northwest Hills County? A: Property tax payments are due November 15th for the current fiscal year. Tax bills are mailed before October 25th, and payments must be postmarked by November 15th to avoid penalties.

Q: What tax credits are available and how do I apply? A: Connecticut offers various tax credits including elderly/disabled homeowner credits, veteran exemptions, and other qualifying programs. These credits reduce your tax bill dollar-for-dollar but require annual application through your local assessor's office. Contact your municipal assessor for specific eligibility requirements and application deadlines.

Q: Is there a Homestead credit, and how does it work? A: While Connecticut doesn't have a traditional "Homestead" credit, qualifying homeowners may be eligible for assessment caps that limit year-over-year assessment increases. These programs require filing an application with your assessor's office and typically cap assessment growth rather than reducing market value.

Q: How often are properties reassessed? A: Connecticut requires municipal revaluations at least every five years, though some municipalities reassess more frequently. Contact your local assessor's office for your specific reassessment schedule.

Q: How do I appeal my property assessment? A: Assessment appeals must be filed with your local Board of Assessment Appeals during specified appeal periods, typically following revaluation notices. Deadlines are strictly enforced, and appeals require supporting documentation of property value.

Q: What are the penalties for late payment? A: Late payments incur interest charges starting the day after the due date. Interest rates and penalty structures are set by state statute and local ordinance.

Q: Can I pay my property taxes online? A: Many municipalities in Northwest Hills County offer online payment options. Check with your local tax collector's office for available electronic payment methods and any associated convenience fees.

Q: What are special district taxes? A: Special district taxes fund specific services like fire protection, lighting, or infrastructure maintenance in designated areas. These appear as separate line items on your tax bill and vary by location within Northwest Hills County.

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