From this line:
SELECT ST_AsEWKT(geom) FROM buildings LIMIT 1;
I get this result:
"SRID=4326;MULTIPOLYGON(((404269.308014269 4543087.6184561,...)))"
I'm wondering if the coordinations are actually in the right format as SRID 4326?
EDIT ---- > The table was updated using this line:
SELECT UpdateGeometrySRID('buildings','geom',4326);