In Poland, the time needed to build a house depends on the design, technology, availability of crews and the sequence of deliveries, so there is no single timescale for every home. Before comparing schedules, establish what completion means: shell without roof, weathertight shell and a house ready for use are different scopes. Check whether the stated time includes formalities, utility connections, earthworks and finishing. Rather than generic declarations, ask about specific starting conditions and confirmed material delivery dates.