They are not overlapping, but they are messy for lightmaps. You’ll need to get the edges parallel to the grid so that you dont get such jagged shadow bleeding on the edges. And you should use your modeling software instead of the editor’s UV generator.
Also, i noticed that you imported the whole flat of an apartment as a single mesh? If so i suggest splitting it into 2-3 pieces and then UV map again for better lightmap resolution.