Mainmast Circle

New Castle | New Hampshire

Where Towers

Touch Tomorrow

View Photos Watch Film 360° VTour Open House

Susan Spaulding

Presented At

$2,400,000

Bedrooms

Bathrooms

Living

3,730

SQFT

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Mainmast Circle

New Castle | New Hampshire

18 Mainmast Circle, New Castle, NH, 03854, USA, New Castle, New Hampshire, United States. , New Castle , New Hampshire

Expansive Coastal Retreat Offering Space, Privacy, and Elegance

Experience exceptional living in this rare 6-bedroom, 4-bath home set on a beautifully wooded and private lot in desirable New Castle, NH. Designed for both everyday comfort and impressive entertaining. This home features an open-concept kitchen and living area with soaring cathedral ceilings that create a sense of light and spaciousness. The chef’s kitchen is equipped with top-of-the-line appliances and an spacial flow into the main living space. A stunning stone fireplace anchors the room, offering warmth and architectural impact. With its unusually generous square footage for New Castle, this home provides remarkable flexibility—ideal for living, hosting guests, and dedicated work and creative spaces. Enjoy peaceful, wooded surroundings just moments from the coast. Combining space, privacy, and New Castle’s coveted low tax rate, this property offers an outstanding opportunity in one of New Hampshire’s most sought-after communities.

Property

3D Street View Tour

Property Location

18 Mainmast Circle, New Castle, NH, 03854, USA, New Castle, New Hampshire, United States., New Castle New Hampshire

Local Weather & Climate

New Castle, New Hampshire

Current Conditions Updated recently

30 °F

Broken clouds

Feels Like 25°F

Humidity 91%

Wind 5 mph

Visibility 6.2 mi

Sunrise 11:24 AM

Sunset 10:27 PM

5-Day Forecast

Thu 26 Feb

Clouds

High 33°

Low 29°

Fri 27 Feb

Clouds

High 35°

Low 17°

Sat 28 Feb

Clouds

High 42°

Low 29°

Sun 1 Mar

Snow

High 38°

Low 29°

Mon 2 Mar

Clouds

High 21°

Low 13°

Data from OpenWeatherMap

Walkability & Transit Scores

How easy is it to get around New Castle?

Walkability and transit scores for this address come from the EPA National Walkability Index.

Mortgage Calculator

Estimate your monthly payments for this property

Home Price

Down Payment

$100,000

Interest Rate

Loan Term

Estimated Monthly Payment $3,160

Monthly Payment Breakdown

Principal & Interest $2,528

Loan Amount $400,000

Total Interest $337,621

Total Cost $737,621

Potential Tax Benefits (United States)

$0 Est. First Year Interest Deduction

$0 Est. Annual Tax Savings

*Based on post-2017 tax law. Actual deductions depend on filing status, itemization, and current tax laws.

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Important Information

This calculator is for illustrative purposes only and does not constitute a loan offer, pre-approval, or commitment to lend.
Monthly payment estimates do not include property taxes, homeowner's insurance, HOA fees, or other applicable costs which may significantly increase your actual payment.
Interest rates shown are for demonstration only. Actual rates depend on your credit score, down payment, loan type, property location, and current market conditions.
This tool provides estimates only. Consult with a licensed mortgage professional for accurate quotes and personalized advice.
Tax benefit calculations are simplified estimates based on general assumptions for United States. Actual deductions depend on your specific tax situation, filing status, and current tax laws.
Tax Year Information: Tax data shown is based on United States tax year 2025 (fiscal year: January-December), rules effective from 2018 through 2025. Tax laws change frequently and may have been amended since this data was compiled.

Tax Information Disclaimer

The tax benefit information displayed on this page is provided for general informational and educational purposes only. This information:

Does not constitute tax advice and should not be relied upon as such. Tax laws are complex and vary by jurisdiction, individual circumstances, and are subject to change without notice.
May not be current or accurate for your specific situation. Tax rules are updated frequently by governments, and the information shown may not reflect the most recent changes.
Uses simplified assumptions that may not apply to your circumstances, including filing status, total income, other deductions, alternative minimum tax considerations, and local tax variations.
Should not be used as the basis for any tax planning decisions or financial strategies without consulting a qualified tax professional licensed in your jurisdiction.

Before making any decisions based on potential tax benefits, you should consult with a qualified tax advisor, certified public accountant (CPA), or licensed tax professional who can evaluate your specific circumstances and provide advice tailored to your situation.

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Frequently Asked Questions

Common questions about this property

How many bedrooms and bathrooms does 18 Mainmast Circle, New Castle, NH, 03854, USA, New Castle, New Hampshire, United States have?

This house at 18 Mainmast Circle, New Castle, NH, 03854, USA, New Castle, New Hampshire, United States features 6 bedrooms with 3,730 square feet of living space.

What is the size of 18 Mainmast Circle, New Castle, NH, 03854, USA, New Castle, New Hampshire, United States?

This property offers 3,730 square feet of living space.

What is the listing price for 18 Mainmast Circle, New Castle, NH, 03854, USA, New Castle, New Hampshire, United States?

This property is listed at $240,000,000, which equals $64343 per square foot.

What type of property is 18 Mainmast Circle, New Castle, NH, 03854, USA, New Castle, New Hampshire, United States?

This is a house located in New Castle, New Hampshire. The property is situated in an established neighborhood with convenient access to local amenities and services.

Brokerage: