The entrance to the building is said to date back to the Portuguese era.1 It was the French Legation between 1820 and 1860, and subsequently as the headquarters of the Naib, or Sultan's delegate during the international period. It reverted to municipal offices after independence. In recent decades the building decayed substantially, and preservation is now a concern.2
Roca Juan Ramón, Tangier and Its Surroundings, Assilah and Chefchaouen an Illustrated Guide (Alicante (C/ San Carlos, 93, 03013 Alicante): J.R. Roca, 2011). p.45
التحرير هيئة. “Dar Niaba, Monument Historique De Très Grande Importance, Tombe En Ruine,” December 10, 2019. https://ladepeche24.com/francais/tourisme/dar-niaba-monument-historique-de-tres-grande-importance-tombe-en-ruine/. Archived at https://perma.cc/XNR3-GJPK.