A House - a Poem

I wrote a poem once
that got mistaken by some builders
for the blueprint of a house
and they set about constructing
this poem as a prefab
adding adjectives to the foundation
of nouns and verbs
and fitting it with commas
to see through

I happened upon them as they
lay a question mark down as
roof, slowly lowering it
from a considerable height

I wondered what they thought
they had built
and wandered off
one poem poorer