What Are Property Taxes Like in Greenwich, CT?

If you're looking at Greenwich, CT real estate, one of the main reasons why people buy here are the low real estate taxes. Property taxes are usually the first number you want a straight answer on. Here's how it works, and how Greenwich stacks up against the towns around it.

How Is Property Tax Calculated in Greenwich?

Connecticut has no statewide property tax. Each of the state's 169 towns sets its own mill rate every year, and that rate applies to your property's assessed value, not its market price.

State law sets assessed value at 70% of a property's appraised fair market value. A home appraised at $2,000,000 carries an assessed value of $1,400,000. Multiply that by the mill rate, which is dollars owed per $1,000 of assessed value, and you have your annual tax bill.

What Is Greenwich's Current Mill Rate?

Greenwich's mill rate for fiscal year 2026-2027 was set at 10.125 for properties on septic systems and 10.484 for properties on the town sewer system, among the lowest of any large Connecticut town.

Greenwich just finished its required five-year town-wide revaluation. New assessments took effect on the July 2026 tax bill. 50% of your property taxes are paid in July and the other half in January.  The Board of Estimate and Taxation sets a new mill rate every May to reflect those updated assessments, so this year's number can differ from last year's even if your home's value hasn't changed.

How Does Greenwich Compare to Nearby Towns?

Greenwich has carried one of the lowest mill rates in Fairfield County for years. Well below the towns just to its east Stamford, Darien, New Canaan and Westport.

On a comparably priced home, that gap adds up fast. It's one reason buyers relocating from higher-tax towns, and from New York, keep landing in Greenwich.

What Tax Relief Programs Are Available for Greenwich Homeowners?

Connecticut offers a state-funded Elderly and Disabled Homeowners' Circuit Breaker credit for qualifying homeowners who meet age and income requirements. The town applies it directly. To know what this circuit breaker credit is, one would have to contact the Greenwich Town Assessor to verify if for their specific case.

If you think your new assessment doesn't reflect your home's fair market value, you can appeal. Greenwich's Board of Assessment Appeals hears appeals every spring, with applications typically due in late February.

If you're weighing what a Greenwich purchase costs to carry year over year, this is worth walking through together before you make an offer, not after your first tax bill shows up.

Russell Pruner | Senior Real Estate Specialist | CRS | GRI | SRES | Six-Time GAR-GMLS President | 40+ Years  in Greenwich | Greenwich Streets Team at Compass 

The Greenwich Streets Team has been named RealTrends Verified for 2026, placing them among the top 1.5% of real estate  professionals nationwide. 

Frequently Asked Questions

What does "mill rate" mean? 

A mill rate is the amount of tax owed per $1,000 of a property's assessed value. If a town's mill rate is 12, you'd owe $12 in tax for every $1,000 of assessed value.

Why is my assessed value lower than my home's market value? 

Connecticut law requires towns to assess property at 70% of fair market value, not 100%. This is standard across every Connecticut municipality, so it doesn't affect how towns compare to one another.

How often does Greenwich reassess property values? 

State law requires a town-wide revaluation every five years. Greenwich's most recent revaluation reflects property values as of October 1, 2025, and takes effect on the July 2026 tax bill.

Can I appeal my property tax assessment? 

Yes. Homeowners who disagree with their new assessment can apply to Greenwich's Board of Assessment Appeals. Applications and deadlines are posted by the Assessor's office each year, generally in February.

Does a higher assessment automatically mean a higher tax bill? 

Not necessarily. The town typically adjusts the mill rate downward after a revaluation to help offset higher assessments town-wide, though your individual bill still depends on how your property's value changed relative to the town average.

Last updated: September 2026