Hangar One Restored: The Steel Frame, New Skin and Long Timeline Behind Moffett’s Landmark
By Matthew Martinez, Founder, CEO & Managing Broker, Diamond Real Estate Group. California DRE #01869679.
Hangar One’s return to an enclosed form marks the completion of a long and technically complex restoration. NASA’s March 2026 update confirms that Planetary Ventures finished the work in December 2025.
The project is especially revealing because its structural frame and outer skin were separated for years. The familiar silhouette returned through work on both visible surfaces and the systems required to support a functioning building.
The hangar was built around an unusually large enclosed volume
NASA’s restoration account dates Hangar One to 1933 and identifies its original role housing the USS Macon airship. It gives approximate dimensions of 1,133 feet long, 308 feet wide and 198 feet high.
These dimensions explain why the building reads as a landscape-scale landmark. Its enclosure was designed for an aircraft whose movement and storage required an extraordinary continuous volume.
The shape is therefore closely connected to the original program. A hangar’s span, clearance and openings are functional parts of the design, alongside its architectural appearance.
The frame and outer covering perform different jobs
NASA’s archival engineering condition assessment describes the arched steel trusses and their bracing, together with secondary members supporting the covering. It identifies riveted built-up members rather than a simple uniform shell.
The frame organizes the span and transfers loads; the siding and roof provide the enclosure. When the old exterior was removed, the structural arrangement became unusually visible.
This separation helps explain the restoration sequence. Preserving the frame and restoring the enclosure were related operations, but they were not the same construction task.
The assessment identifies fourteen principal trusses at seventy-two-foot intervals, carried by A-shaped frames over a piled foundation. Two expansion joints divide the structure into three sections. The immense outer form therefore contains a deliberate structural organization, with repeated spans and separations rather than one uninterrupted rigid frame. Exposed-frame photographs make that arrangement easier to understand than the completed exterior alone.
The opening doors are substantial moving structures
The assessment describes the enormous clamshell, or orange-peel, doors as paired steel-ribbed leaves opening outward from the center. The curved movement accommodates an opening suited to the original airship program.
At this scale, a door is part of the building’s engineering rather than a small component placed within a wall. Its geometry, support and movement influence the entire end of the hangar.
The form makes a practical requirement visible: the building needed to admit an object almost as remarkable in scale as the enclosure itself.
Remediation came before the restored appearance
NASA’s 2026 account describes the Navy’s earlier removal of contaminated exterior materials and later work by Planetary Ventures to remove remaining contamination, protect and repaint the frame, and restore siding, windows and doors.
The work proceeded in contained sections before the finished exterior could be reinstated. Structural, mechanical and other improvements accompanied the return of the building’s recognizable appearance.
The completed skin is therefore the visible result of a longer process, rather than simply a new covering applied to an untouched structure.
The lease established a framework for the work
NASA’s 2014 lease announcement identified rehabilitation of Hangar One as part of the airfield arrangement, with the federal government retaining title to the property.
The historical agreement and the later completion announcement serve different purposes. One records the obligations established for future work; the other confirms the restoration milestone that was subsequently achieved.
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Sources checked October 28, 2026. Restoration completion is attributed to NASA; it does not establish general public access or a particular present use of the interior.
