The speaker sets out to build a house for someone they love, and the whole poem treats that house as a way of talking about the relationship. The building materials are personal: old poems from notebooks, sketches on napkins, even the speaker's own heart, which they carve with a chisel until they are exhausted and in tears. The loved one steps in, takes the tool away, and comforts them. From there, the speaker clears space in their life, putting aside work and appointments so that time together comes first.
The mood starts out tender and a little weary, then settles into warmth. The house isn't perfect. The speaker admits that walls have fallen and the ground creaks, and the two disagree over one of the books that form the roof. But they laugh and shrug, which suggests the poem is about accepting flaws together. The ending, where the loved one calls it "a nice little house," feels modest, affectionate, and quietly happy.