According to Vastu Shastra the main entrance and internal parts of flat/house should be proper place. If these are at proper place than it's give us good results. The main entrance and the rooms suitable place ( direction ) given below :
Main entrance/room and etc ----- Direction / place
1. Main entrance ----- North North West, East North East and West South West.
2. Pooja Room ----- North East.
3. Kitchen Room ----- South East.
4. Bed Room ----- North North West, South, North North East.
5. Toilet/ bathroom ----- South South West and East South East.
6 Store Room ----- North West.
7. Drawing Room ----- West .
8 Study Room ----- South West.
9. Balcony ----- North and East.
If your flat's direction is at proper place then it is good. If it is not then you have sent a map of flat for best suggestion.