How to Say "official building" in Spanish
The Spanish word for “official building” is “palacio” — A1 level. This is a very common word in everyday Spanish.

Examples
El presidente trabaja en el palacio de gobierno.
The president works in the government palace (or building).
El Palacio Real de Madrid es una atracción turística popular.
The Royal Palace of Madrid is a popular tourist attraction.
Dicen que la familia construyó un palacio con todo su dinero.
They say the family built a mansion with all their money.
Gender Rule
Remember that 'palacio' is always masculine, so you must use 'el' or 'un' before it: 'el palacio'.
Confusing Gender
Mistake: “La palacio.”
Correction: El palacio. Although many words ending in '-o' are masculine, it's always good to confirm, but this one follows the standard pattern.
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