build onto

verb

built onto; building onto; builds onto

: to add (a new room) to a structure that already exists

They built a new garage onto their house.

They built onto their house.

Examples of build onto in a Sentence

Recent Examples on the Web

This medieval village was built onto a cliff overlooking the sea, where you can get lost in the narrow lanes among crumbling buildings with laundry dangling on clotheslines. — Laura Itzkowitz, Travel + Leisure, 27 June 2026

After Willa’s bedroom was built onto the small house, the cottage was dressed to show the accumulation of the years the father and daughter had lived there. — Pat Saperstein, Variety, 27 Sep. 2025