Buyers in Westport tend to focus on the price, the rate and the down payment. The recurring costs deserve the same attention, because several of them work in ways that surprise newcomers. This guide goes through them in the order they will show up.
Property tax
Connecticut taxes real estate on its assessment, which is 70 percent of the fair market value the town assigned at its last revaluation. Westport’s most recent revaluation took effect on Oct. 1, 2025. For fiscal 2026-27 the mill rate is 13.2, meaning $13.20 of tax for every $1,000 of assessment.
The formula is simple. Multiply the assessment by 13.2 and divide by 1,000.
The point many buyers miss is that the assessment comes from the town’s October 2025 valuation, not from what you pay. Look up the current assessment on the town’s property records before you bid, and do the arithmetic yourself. For context, the average residential bill this year is $20,562 on an average assessment of $1,557,757, according to figures presented to the Board of Finance. Our revaluation story explains why the typical bill rose even as the rate fell.
Westport bills once a year and collects in four installments, due July 1, Oct. 1, Jan. 1 and April 1. Each can be paid without penalty for a month. After that, interest runs at 1.5 percent a month, or 18 percent a year, from the original due date.
Owners 65 and older and owners who are totally disabled may qualify for the town’s tax relief program if they meet income limits and have owned and lived in the house for a year. Applications run from Feb. 1 to May 15. The state’s Circuit Breaker program offers credits of up to $1,250 for married couples and $1,000 for single filers in the same window.
Sewer or septic
Sewer service is generally available south of the Merritt Parkway, according to the town’s Engineering Department. North of the Merritt, as a rule, it is not, and houses rely on septic systems. If the house is on sewer, the town bills a sewer use charge based on water consumption from November through March, multiplied by 2.4, on the same quarterly schedule as property taxes. The town’s Geographic Information System has a layer showing which properties are on sewer.
Sewer extensions happen only by petition of a majority of the owners along the route. The cost can be significant. A 2023 extension proposal for Whitney Street, Roseville Road and Ledgemoor Lane projected about $50,856 a home.
Homeowners insurance
Homeowners insurance has grown more expensive nationally. Federal Insurance Office data cited by 06880 found that homeowners premiums rose 8.7 percent faster than inflation from 2018 to 2022, and that ZIP codes in the highest-risk fifth for climate exposure paid 82 percent more. Professionals quoted in that piece said underwriters look closely at roof age, past water damage and buried oil tanks. Ask the seller for a CLUE report, the industry’s claims history for the property, before you finalize your offer.
Flood insurance
A standard homeowners policy does not cover flood. Since July 1, 2026, Connecticut requires homeowners, renters and condominium policies to say so in plain language. If the house is in a FEMA special flood hazard area and you borrow from a federally regulated or insured lender, flood insurance will be required.
Westport participates in FEMA’s Community Rating System at Class 8, which gives a 10 percent discount on National Flood Insurance Program premiums. Under FEMA’s current pricing method, Risk Rating 2.0, most annual premium increases are capped at 18 percent. Our flood zone field guide explains how to check a specific address.
The train
An annual railroad parking permit costs $400 plus tax, or $425.40, for one car, and $531.75 for a two-car shared permit. The town’s railroad parking FAQ has described the waiting list as just under two years, so apply as soon as you close. The Metro-North monthly ticket from Westport and Green’s Farms costs $440.50 under the MTA’s current fare table. Our commuting guide has the details.
The beach
A beach emblem is required from May 1 to Sept. 30 at Compo Beach and Old Mill, and Old Mill is reserved for residents. Resident emblems have historically been inexpensive. In 2023 the resident fee was $60, and $30 for seniors 62 and older. Confirm the current price with Parks and Recreation when emblem sales open in March.
What is not on the list
Conveyance tax is paid by the seller in Connecticut, not the buyer. Buyers do pay their own attorney, title insurance and lender costs, which our closing guide covers.
Sources
- Town of Westport, Assessor’s Office, frequently asked questions, accessed Oct. 2026
- Town of Westport, Tax Collector, yearly tax calendar, accessed Oct. 2026
- Westport Journal, The path from Westport’s 2027 budget to your quarterly real estate tax payment, May 26, 2026
- Town of Westport, Property tax relief, accessed Oct. 2026
- Connecticut Office of Policy and Management, Homeowners elderly and disabled Circuit Breaker tax relief program, accessed Oct. 2026
- Town of Westport, Engineering Department, accessed Oct. 2026
- Town of Westport, Water Pollution Control Facility, accessed Oct. 2026
- Westport Journal, Largest fees in pipeline for Whitney, Roseville, Ledgemoor sewers, Feb. 10, 2023
- 06880, Ensure that your home is well insured, March 16, 2025
- Connecticut Insurance Department, Bulletin PC-93-25, July 8, 2025
- FEMA, Understanding Risk Rating 2.0, July 2025
- Town of Westport, Railroad permit parking, accessed Oct. 2026
- MTA, Metro-North fare table, 2026
- Westport Journal, Resident vs. out-of-towner, at what cost a day at the beach, Feb. 16, 2023
- Connecticut Office of Legislative Research, Real estate conveyance tax, July 9, 2020
