House Prices

Round Island Clayton, NY House Prices & Home Values 2026


Average Data

average house price$680,143
average size per house1885 ft²
average price per ft²376 $ / ft²

06/14/2026 - The value range (VR) for house prices in Round Island Clayton, NY is $357.2/ sqft to $394.8/ sqft. An average home with 1885 sqft costs approximately $700,929 to $774,711. Clayton, NY includes 1 ZIP codes and it is located in Jefferson county. The lowest prices are found in ZIP 13624, while the highest are in ZIP 13624. The average price per sqare feet is $376. Our analysis is based on 4 property listings.

Avergage prices by ZIP codes Round Island Clayton

13624172 $ / ft²




Historical development of home values in Round Island Clayton

Year Estimated value (USD) Change vs. 2025
2010 $315,871 -53.6%
2011 $303,656 -55.4%
2012 $302,838 -55.5%
2013 $314,158 -53.8%
2014 $329,779 -51.5%
2015 $346,704 -49.0%
2016 $364,798 -46.4%
2017 $384,487 -43.5%
2018 $405,744 -40.3%
2019 $424,558 -37.6%
2020 $446,505 -34.4%
2021 $507,852 -25.3%
2022 $592,041 -13.0%
2023 $624,335 -8.2%
2024 $660,453 -2.9%
2025 $680,143 0.0%

Graph: estimated home values in Round Island Clayton over time (USD)



Example: 100% financing house in Round Island Clayton

Loan amount: $680,143

Interest rate: 6.25%

Fixed monthly payment: $4,185.99

Breakdown in the 1st month:
Interest portion: $3,540.14  –  Principal portion: $645.84

Yearly breakdown (100% financing)

Year Interest per year ($) Principal per year ($) Remaining balance at year-end ($)
1 $42,255.97 $7,975.89 $672,167.11
2 $41,743.28 $8,488.57 $663,678.54
3 $41,197.64 $9,034.21 $654,644.32
4 $40,616.93 $9,614.93 $645,029.39
5 $39,998.89 $10,232.97 $634,796.42
6 $39,341.12 $10,890.74 $623,905.68
7 $38,641.07 $11,590.79 $612,314.89
8 $37,896.02 $12,335.84 $599,979.05
9 $37,103.07 $13,128.78 $586,850.26
10 $36,259.16 $13,972.70 $572,877.57
11 $35,361.01 $14,870.85 $558,006.71
12 $34,405.12 $15,826.74 $542,179.97
13 $33,387.78 $16,844.08 $525,335.89
14 $32,305.05 $17,926.81 $507,409.09
15 $31,152.73 $19,079.13 $488,329.96
16 $29,926.33 $20,305.53 $468,024.43
17 $28,621.10 $21,610.76 $446,413.67
18 $27,231.97 $22,999.88 $423,413.79
19 $25,753.55 $24,478.30 $398,935.48
20 $24,180.10 $26,051.76 $372,883.73
21 $22,505.51 $27,726.35 $345,157.38
22 $20,723.27 $29,508.58 $315,648.80
23 $18,826.48 $31,405.38 $284,243.42
24 $16,807.76 $33,424.10 $250,819.31
25 $14,659.27 $35,572.58 $215,246.73
26 $12,372.69 $37,859.17 $177,387.56
27 $9,939.12 $40,292.74 $137,094.82
28 $7,349.12 $42,882.73 $94,212.09
29 $4,592.65 $45,639.21 $48,572.88
30 $1,658.98 $48,572.88 $0.00

Note: The calculation is based on a standard annuity mortgage with a fixed monthly payment over the entire term. Extra payments, interest rate changes, and additional purchase costs (e.g. taxes, notary fees) are not included.


How to sell in Round Island Clayton, NY


1500 sqft3900 sqft
Ø selling price$710,421$1,511,258
Ø fast selling$645,837$1,360,132
Ø high price sale$775,004$1,662,383

In 2026, houses in Round Island Clayton, NY will be offered at an average price of $376 per square foot. A 1,500 sqft home priced at $710,421 is 23.94% more expensive per square foot than a 3,900 sqft home priced at $1,511,258. Home prices in Round Island Clayton, NY vary significantly depending on the property’s condition and exact location. For a quick sale, a 2,700 sqft home should be listed at around $1,046,255. Sellers who can wait longer may achieve a higher price of up to $1,278,757.


Round Island, Clayton NY: Waterfront Living in the Thousand Islands

Location and Lifestyle

Round Island in Clayton, NY sits in the heart of the Thousand Islands on the shimmering St. Lawrence River. This intimate island neighborhood offers classic waterfront cottages, private docks, and panoramic ship-watching vistas.
Residents and visitors enjoy boating, kayaking, sailing, and world-class freshwater fishing from calm channels and nearby shoals. The area is boat-access-only from downtown Clayton, encouraging a relaxed, walkable pace minutes from restaurants, galleries, and markets. Its proximity to the Antique Boat Museum and the riverfront district adds culture and convenience to laid-back island living.

History and Character

Rich in Gilded Age lore, Round Island once hosted the grand Hotel Frontenac, a celebrated resort that drew travelers to the Thousand Islands.
Today, preserved cottage architecture and leafy paths honor that heritage while practical dockage and modern comforts support easy seasonal stays. Sunset porches frame sweeping views of islands and Seaway freighters, with abundant wildlife and quiet coves for paddling.

Access and Real Estate

Real estate on Round Island, Clayton NY ranges from historic summer cottages to updated waterfront homes prized for privacy and direct river access.
With water-taxi services and private boats from Clayton?s marinas, the neighborhood delivers a rare blend of tranquility, recreation, and small-town convenience.



FAQ – Home Values in Round Island Clayton

What is the median home value in Round Island Clayton in 2026?

In 2026, the typical home value in Round Island Clayton is about $680,143 for an average home size of 1885 square feet. This corresponds to an average price of roughly $376 per square foot.

What is the average cost per square foot in Round Island Clayton?

In 2026, homes in Round Island Clayton sell for an average of around $376 per square foot, with a typical range between $357.2 and $394.8 per square foot, depending on the property’s location, condition, and lot size.

What is the average home size in Round Island?

The average home size in Round Island Clayton is about 1885 square feet, with an estimated 2026 value around $680,143.



Neighborhoods close to Round Island Clayton, NY

Colton Colton, NY177 $ / ft²
East De Kalb De Kalb Junction, NY180 $ / ft²
Ellisburg Ellisburg, NY175 $ / ft²
West Carthage Carthage, NY185 $ / ft²
Cape Vincent Cape Vincent, NY186 $ / ft²
Goose Bay Alexandria Bay, NY176 $ / ft²
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