Airship hangars: the biggest buildings in aviation and their second life as real estate

Every airship needs a home. An envelope sixty or two hundred metres long cannot be parked in the open for long: wind, snow and sunlight shorten its life. That is why lighter-than-air aviation has produced some of the largest single-span buildings on Earth — hangars so big that they have their own microclimate. Today these halls are also an unusual segment of commercial real estate: they are built, financed, leased and sometimes converted into something entirely different.

From a property point of view, a hangar is a large industrial building on a land plot that must be zoned for aviation or industrial use. A developer needs a title to the land, a building permit and, for leasing, a long-term lease agreement registered in the land registry. A clear-span hall of around 50,000 square metres can cost from 50 to 150 million dollars to build, so owners often use project finance or a commercial mortgage secured by the building itself. Appraisers value such assets not by price per square metre of floor space alone but by height, crane capacity and access to runways or open land.

How a hangar is designed

The key requirement is a huge internal volume without columns. Designers use steel or glued-laminated timber arches, sometimes trusses spanning over 200 metres. Doors are a separate engineering challenge: they must open the full width of the hall and withstand wind loads when closed. Many historic hangars used enormous sliding or rotating doors weighing hundreds of tonnes.

Inside, the floor must carry mooring equipment and cranes, while the roof needs anchor points for lifting the envelope during maintenance. Ventilation and fire safety rules are strict because of the large volumes of gas and fabric.

Smaller docks and mooring masts

Not every airship needs a giant hall. Small blimps can use inflatable or fabric hangars, which are cheaper and can be moved. Mooring masts — tall towers to which an airship attaches by its nose — allow it to weather-vane freely in the wind. For remote operations, a mast and a modest maintenance shed are often enough.

A second life for giant halls

• Logistics. Clear-span halls are ideal for storage of oversized goods.
• Film studios and event venues. Space for sets that would not fit anywhere else.
• Leisure. One former airship hangar in Germany was converted into an indoor tropical resort with beaches, pools and a rainforest.
• Manufacturing. Assembly of wind turbine blades, ships or aircraft parts.

Such conversions show how specialised real estate can find new tenants when the original use disappears — provided the zoning, the structure and the location allow it.

What it means for the industry

For any new airship programme, the hangar is often one of the first and most expensive investments, sometimes comparable to the cost of the first craft. Reusing existing large buildings, or designing hangars that can later be converted, lowers the risk for investors and makes the whole project easier to finance.