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New Castle, the only town in NH composed entirely of islands, covers approximately 500 acres (.8 square miles) and serves as a scenic residential and recreational community.  New Castle was founded in 1623, chartered in 1679, and incorporated in 1693 during the reign of William and Mary.  Today, in addition to a residential population of slightly more than 1,000, it is home to the Great Island Common recreational park, Wentworth-by-the-Sea Hotel and Spa, a UNH marine research laboratory, a Coast Guard station, and Fort Constitution and Fort Stark state parks.

Photos courtesy of Jim Cerny.

Below you will find two links. These links are related to the 90% Documents for the Water Transmission Main Improvements Project.

Please note that these files are large and could take several minutes to view/load.


                                        Great Island Common - PARK MANAGER

The Town of New Castle is seeking a Park Manager for the Great Island Common. Seasonal position (32 hours per week, late May - mid September). Flexible hours* at beginning and end
of season. Availability on weekends and holidays required.

Duties include:
Supervision of 6-8 summer staff, oversight of revenue collection, scheduling, parking enforcement, grounds maintenance, bathroom cleaning, trash pick up, exterior painting, field patron questions/issues, enforce park policies and regulations, additional responsibilities as required.

Financial and computer literacy, willingness to train staff of all ages/experience levels, previous management experience desirable, landscaping/grounds maintenance experience desirable, must be able to stand/walk for extended periods of time in hot weather, ability to carry 30lbs, strong communication skills.

Starting pay:
$15-$17/hr, salary dependent upon experience

The ideal candidate will be looking for multi-year summer employment.

* Flexible hours can be adjusted to accommodate a traditional academic schedule. Potential summer opportunity for a teacher with weekend availability in May, June, and September.

To Apply:
Send cover letter, resume, and contact information for three references to:

Town of New Castle
Attn: Ben Jankowski
P.O Box 367, 49 Main St.
New Castle, NH 03854

Position open until filled.



May 1, 2019 - Non Resident Passes go on sale at Town Hall. Cost per pass is $100.00. Seniors is $40.00

May 2, 2019 - Ruck March - 12 miles. Starts at 10:30am at the Navy Ship Yard and ends in New Castle at Fort Constitution. Sponsored by the Army National Guard.

REMINDER - All dogs must be leashed while in the Common or on the beach.  

THE TOWN IS NOT accepting any pavilion reservations for the 2019 season until May 1,2019. Wedding reservations only will be accepted on January 1st.  School reservatins are accepted all year.  

GREEN WASTE DATES:  May 11, Jun 8, Jul 13, Aug 17, Sept 14, Oct 12, Nov 23


        WATER SYSTEM NAME                       NEW CASTLE WATER WORKS
        ADDRESS                                 PO BOX 367, 49 MAIN STREET
                                                        NEW CASTLE, NH 03854
                                                        (PART A)        
        WATER SYSTEM PWS#                       1661010

The Town of New Castle has applied for funds through the State of New Hampshire Department of Environmental Services Drinking Water State Revolving Loan Fund (DWSRF), in accordance with Chapter Env_Dw 1100. This document addresses the requirements of Env_Dw 1107; the Environmental Review.


The proposed project includes replacement of approximately 8,000 LF of water main on route 1B (Portsmouth Ave and Main Street) between Shapleigh Island and the intersection of Main Street and Wentworth Rd. in New Castle. Existing 8” water mains will be replaced with new 12” water mains. Hydrants and isolation valves will be replaced along the main. This portion of the project (Part A) is planned for 2019. A second phase of the project (Part B) is planned for 2020, pending permits and approvals.

The Select Board voted to authorize funding in the amount of $5,500,000.00 for this project on June 18, 2018. The Legislative body (Town Meeting) authorized the loan on May 8, 2018.  A public notice will be published by the Town of New Castle and a 30-day comment period will be held in accordance with the DWSRF rules.

The full document is available at, and comments may be addressed to the following locations:  
Bill Stewart, Town of New Castle, PO Box 367, Newcastle NH 03854 and NHDES Attn:  Allyson Gourley, Environmental Review Coordinator, PO Box 95, 29 Hazen Dr., Concord NH 03302-0095.

Need to contact the town office?
  • Phone 603-431-6710
  • Fax 603-433-6198
  • Great Island Common 603-436-1992 (Seasonal phone from mid May to mid September)
  • Email Us

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