Postal Specialties

Postal Boxes

New England's Leader in Postal Specialties

Supplying and installing postal specialties like 4C mailboxes, rear loading mailboxes, mail drop boxes, collection boxes, and more.

Sales and Installations

Granite State Specialties (GSS) supplies and installs a range of postal specialties throughout New Hampshire, Boston and beyond. Safety is always a priority of ours during our installations, which is why our installers have a minimum of 30 hours of OSHA training to ensure your next project is done safely, and in a timely manner. Reach out and talk to a specialist and get a quote for your next job.

Headquartered in New England, Servicing Nationwide.

Our Process


Our team of experienced estimators is focused on offering the most accurate and high quality estimating service available. GSS performs all takeoffs in house and works with all top vendors to provide quick and competitive pricing.

Green Right Arrow

Project Management

Leave the hassle of project management to the experts at GSS. Our knowledgeable project managers have years of experience in the industry and will manage the project from site readiness through installation.

Green Right Arrow


Our OSHA trained installers have decades of experience installing Construction Specialties, ranging from toilet partitions on wall street in New York City to the window shades at the Federal Reserve in Boston, Massachusetts.

Fully Insured + OSHA Trained Installers

Smart Lockers by Luxer One

In a global marketplace where convenience is critical, time is money, and e-commerce is king, shipping and logistical struggles have never been more prevalent. Enter, parcel lockers. We're proud to be an authorized reseller of Luxer One package lockers.


We supply and install everything from standard to cutting edge postal boxes and anything in between. Below is a list of some postal specialties we offer and have experience installing.

  • 4C Mailboxes
  • Rear loading mailboxes
  • Front-loading mailboxes
  • Maildrop boxes
  • Collection boxes
  • Book drops
  • Mail directories


Our relationships with top manufacturers are why we are able to stand out from our competitors and offer quality products at competitive prices. We supply and install some of the industries premier brands such as the following:

  • Auth Florence Mailboxes
  • Salsbury Industries
  • Bommer

Why GSS?

Hiring contractors without experience in the construction specialty industry to handle products such as postal specialties can end up being a nightmare in the long run. Granite State Specialties not only has experience installing numerous makes, models, and brands of postal boxes but has been supplying and installing them for over 30 years. All of our installers are OSHA trained for a minimum of 30 hours to ensure the safety of your project and the workers involved.