Kolmikerroksisen

Kolmikerroksisen is Finnish, an inflected form of the adjective kolmikerroksinen, meaning “three-storey” or “three-floor.” The base form kolmikerroksinen describes something that has three floors, typically a building or part of a building. The word is a compound built from kerros (storey, floor) with the numeral element kolmi- or kolm- integrated to indicate three floors.

In use, kolmikerroksinen describes a noun in nominative singular as kolmikerroksinen talo (a three-storey house). When the noun is in genitive singular, the adjective takes the form kolmikerroksisen, as in kolmikerroksisen talon (of the three-storey house). In partitive singular it becomes kolmikerroksista taloa (a three-storey building as a part of something). In plural, you would typically say kolmikerroksiset talot (three-storey houses).

The term is common in architectural descriptions, real estate, and design journalism, where precise floor counts matter for layout, appearance, and zoning. It is one of several standard Finnish height classifications for buildings, alongside yksikerroksinen (one-storey) and kaksikerroksinen (two-storey), among others.

Etymology traces to kerros (storey) with the числительный element kolm- (three) forming the adjective that can describe the number of floors in a noun phrase. The form kolmikerroksisen is routinely required by Finnish grammar to align with the noun’s case, number, and definiteness.