Groton ― The main entry lobby at Triton Hall, a barracks building at the Naval Submarine Base, has all new floors and windows and a wall featuring new LED lighting to create a welcoming ambiance.

On a tour Thursday, the Navy showed off the newly renovated berthing units, which consist of a bedroom and a bathroom, as well as laundry facilities, a lounge area, and a courtyard undergoing construction to restore a volleyball court and add sidewalks.

The 480-bed residential building, Barracks Building 488, is for junior enlisted sailors at the Naval Submarine School.

The Nutmeg Companies Inc. of Norwich is wrapping up a $27 million renovation of the 109,442-square-foot Triton Hall, built in 1988, which entails upgrades to fire protection, electrical, heating, ventilation, and air systems, elevators, and interior finishes, according to the Navy.

Next, the Norwich company announced it plans to renovate a 78,000-square-foot building, Nautilus Hall, or Building 455, for junior enlisted sailors assigned to the base or tenant commands.

The renovations are part of the Navy’s commitment to continually improve and renovate the base’s barracks buildings “to provide the safe, quality living quarters our Sailors deserve,” said Chris Zendan, spokesperson for the base.

He said providing safe, quality housing for sailors and their families is a top priority for the Navy.

Jason L. Bugbee, vice president of The Nutmeg Companies Inc., said the approximately $36 million upgrade of Nautilus Hall will entail renovations to the rooms, bathrooms, fire protection system and plumbing, removal of the existing furniture, and the installation of new light fixtures, sprinkler system and electrical system. The project also calls for mold remediation.

The lobby, offices and other spaces will be further renovated, an elevator will be upgraded, and a new elevator will be installed.

The building, which has 188 beds, was built in 1978 and renovated in 1999, according to the Navy.

Bugbee said the building, which is located on the upper part of the base, has been used ever since it was constructed in the late 1970s so everything has become pretty tired and is in need of renovation. The building will be unoccupied during construction.

The two-year project is anticipated to begin around mid-October, Bugbee said.

After the company completes renovations of Triton Hall, residents currently living in another building, Grayling Hall will move to Triton Hall, said Zendan. Then residents of Nautilus Hall will move to Grayling Hall, right before renovations to Nautilus Hall begin.

Bugbee said The Nutmeg Companies has done renovation work for the military before, including at the Portsmouth Naval Shipyard in Kittery, Maine, Naval Station Newport and the U.S. Military Academy at West Point. Recently, the company announced it was awarded a $22.6 million contract for renovations to a facility at the Portsmouth Naval Shipyard.

The Naval Submarine Base has 3,000 housing beds for single sailors, according to Navy spokesperson Lt. Meagan Morrison.

The beds are located in eight barracks buildings on the base, said Zendan.

Morrison said in addition, that there are more than 1,800 family housing units in Groton run by Balfour Beatty Communities, which is a Navy public-private venture.

k.drelich@theday.com