Boathouse 7, initially built as a mast house, later served as a centre for the construction, repair, and storage of small boats. Alongside Boathouse 5, it stands as a prime example of the timber-framed buildings once prevalent in Naval dockyards. Both structures are partially constructed over the Mast Pond, atop cast iron supports.

The Trust’s restoration and conversion efforts for Boathouse 7 were recognized with two awards: the Portsmouth Society’s Best Restoration 1995 and Portsmouth City Council Planning Committee’s Good Planning & Conservation Award 1995.

Today, the building boasts the largest Historic Dockyard restaurant and events space, providing a versatile venue for various occasions. Additionally, it hosts the Dockyard Apprentice Exhibition, offering insights into civilian dockyard history, and Nauticalia, a maritime-themed gift shop.