Building on a Cloud
Scholars have said that seeing oneself building a house on a cloud may indicate attaining a noble and lawful worldly life accompanied by wisdom and elevation. Building a palace on a cloud, on the other hand, suggests avoiding sins through acquired wisdom and achieving benefits that the dreamer understands.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.