In New Hampshire, MacArthur has been active at the Pease International Industrial Park in Portsmouth, New Hampshire. To encourage local employment, Pease formerly a U.S. Air Force base, has been converted to an office and manufacturing park. Qualified developers lease land or buildings in the park. MacArthur has acquired several of these properties, such as the former school on the base and redeveloped them for office and light manufacturing use.

1. Pease International Tradeport, Portsmouth, New Hampshire:
   29 New Hampshire Avenue - Renovation and modernization of 12,000 sq. ft. building, currently fully leased. Developed in 1996/97.
   
   
2. 125 Aviation Avenue - 65,000 sq. ft. new Office/Light Industrial Building constructed in 1998/99 and fully leased in 1999.
   
   
3. Corporate Drive - a 55,000 sq. ft. school, gut renovated and converted to office space. Fully leased in 1999.
   
   

Nearby in Rochester, New Hampshire, MacArthur has developed the Granite State Business Park. This was raw land acquired by MacArthur in 1989, subdivided, and parcels have been sold, leased and developed for various manufacturing companies. The original acquisition was 250 acres and MacArthur still owns approximately 94 acres.

At 55 High Street, Hampton, New Hampshire, MacArthur built a 24,000 sq. ft. office and medical facility. Built and leased in 1998/99.