House Prices

Rattlesnake Island Alton Bay, NH House Prices & Home Values 2026


Average Data

average house price$1,361,304
average size per house2556 ft²
average price per ft²528 $ / ft²

07/04/2026 - The value range (VR) for house prices in Rattlesnake Island Alton Bay, NH is $501.6/ sqft to $554.4/ sqft. An average home with 2556 sqft costs approximately $1,270,551 to $1,404,293. Alton Bay, NH includes 1 ZIP codes and it is located in Belknap county. The lowest prices are found in ZIP 03810, while the highest are in ZIP 03810. The average price per sqare feet is $528. Our analysis is based on 6 property listings.

Avergage prices by ZIP codes Rattlesnake Island Alton Bay

03810550 $ / ft²




Historical development of home values in Rattlesnake Island Alton Bay

Year Estimated value (USD) Change vs. 2025
2010 $632,214 -53.6%
2011 $607,766 -55.4%
2012 $606,130 -55.5%
2013 $628,786 -53.8%
2014 $660,052 -51.5%
2015 $693,928 -49.0%
2016 $730,142 -46.4%
2017 $769,550 -43.5%
2018 $812,095 -40.3%
2019 $849,751 -37.6%
2020 $893,679 -34.4%
2021 $1,016,463 -25.3%
2022 $1,184,968 -13.0%
2023 $1,249,604 -8.2%
2024 $1,321,895 -2.9%
2025 $1,361,304 0.0%

Graph: estimated home values in Rattlesnake Island Alton Bay over time (USD)



Example: 100% financing house in Rattlesnake Island Alton Bay

Loan amount: $1,361,304

Interest rate: 5.95%

Fixed monthly payment: $8,114.50

Breakdown in the 1st month:
Interest portion: $6,745.26  –  Principal portion: $1,369.24

Yearly breakdown (100% financing)

Year Interest per year ($) Principal per year ($) Remaining balance at year-end ($)
1 $80,487.87 $16,886.18 $1,344,417.82
2 $79,456.00 $17,918.05 $1,326,499.77
3 $78,361.07 $19,012.98 $1,307,486.80
4 $77,199.24 $20,174.81 $1,287,311.99
5 $75,966.41 $21,407.64 $1,265,904.34
6 $74,658.24 $22,715.81 $1,243,188.53
7 $73,270.13 $24,103.92 $1,219,084.62
8 $71,797.20 $25,576.85 $1,193,507.77
9 $70,234.27 $27,139.78 $1,166,367.98
10 $68,575.82 $28,798.23 $1,137,569.76
11 $66,816.03 $30,558.02 $1,107,011.74
12 $64,948.71 $32,425.34 $1,074,586.40
13 $62,967.28 $34,406.77 $1,040,179.63
14 $60,864.77 $36,509.28 $1,003,670.34
15 $58,633.78 $38,740.27 $964,930.07
16 $56,266.45 $41,107.60 $923,822.47
17 $53,754.47 $43,619.58 $880,202.89
18 $51,088.99 $46,285.06 $833,917.83
19 $48,260.62 $49,113.43 $784,804.40
20 $45,259.43 $52,114.62 $732,689.78
21 $42,074.83 $55,299.22 $677,390.56
22 $38,695.63 $58,678.42 $618,712.14
23 $35,109.94 $62,264.11 $556,448.04
24 $31,305.14 $66,068.91 $490,379.13
25 $27,267.83 $70,106.22 $420,272.91
26 $22,983.82 $74,390.23 $345,882.68
27 $18,438.02 $78,936.03 $266,946.64
28 $13,614.43 $83,759.62 $183,187.03
29 $8,496.09 $88,877.96 $94,309.07
30 $3,064.98 $94,309.07 $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 Rattlesnake Island Alton Bay, NH


1500 sqft3900 sqft
Ø selling price$949,696$2,020,261
Ø fast selling$863,360$1,818,235
Ø high price sale$1,036,032$2,222,287

In 2026, houses in Rattlesnake Island Alton Bay, NH will be offered at an average price of $528 per square foot. A 1,500 sqft home priced at $949,696 is 22.79% more expensive per square foot than a 3,900 sqft home priced at $2,020,261. Home prices in Rattlesnake Island Alton Bay, NH 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 $1,398,642. Sellers who can wait longer may achieve a higher price of up to $1,709,452.

FAQ – Home Values in Rattlesnake Island Alton Bay

What is the median home value in Rattlesnake Island Alton Bay in 2026?

In 2026, the typical home value in Rattlesnake Island Alton Bay is about $1,361,304 for an average home size of 2556 square feet. This corresponds to an average price of roughly $528 per square foot.

What is the average cost per square foot in Rattlesnake Island Alton Bay?

In 2026, homes in Rattlesnake Island Alton Bay sell for an average of around $528 per square foot, with a typical range between $501.6 and $554.4 per square foot, depending on the property’s location, condition, and lot size.

What is the average home size in Rattlesnake Island?

The average home size in Rattlesnake Island Alton Bay is about 2556 square feet, with an estimated 2026 value around $1,361,304.



Neighborhoods close to Rattlesnake Island Alton Bay, NH

Atkinson Center Atkinson, NH541 $ / ft²
Bartlett Village Bartlett, NH258 $ / ft²
Center Conway Village Center Conway, NH483 $ / ft²
Alton Center Alton, NH321 $ / ft²
Downtown Portsmouth, NH267 $ / ft²
Seminary Hill West Lebanon, NH184 $ / ft²
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