noun, noun or participle which takes 'suru', transitive verb
building addition; extension; annex
Refers to the act of adding a new section to an existing building, or the added part itself. Commonly used in housing and construction contexts.
家が手狭になったので、建て増しをすることにした。
The house became cramped, so we decided to build an extension.
この建物は何度も建て増しされて、複雑な構造になっている。
This building has been extended many times, resulting in a complex structure.