List of most expensive buildings
In the following, a building is defined as a structure with a roof and walls that stands permanently in one place. Airports are excluded as their construction cost includes runways and systems; however, terminal buildings are included in the list.
| Building | City | Country | Architect/designer | Current owner | Completed/ will complete | Nominal cost | Inflation-adjusted cost, 2021 |
| The Great Mosque of Mecca or Masjid al-Haram | Mecca |  Saudi Arabia |