Parking areas in an apartment and flat owners space out of flat area

Myself lives in a apartment having two wings, 8 flats on each side since last 12 years. Builder have done sale deed but not given property card yet. As it is at lower ground level, all flat owners park their vehicles just near my flat wall either it is toilet, bathroom or ,bedroom or living room. Infants, guests and senior citizens sometimes wake up frightening on arrival of vehicle for parking immediately. Many times we have suggested the apartment flat holders about parking allotment. Many flat holders have kept college boys on rent who park vehicles alongside flat walls. Every flat have 3 vehicles minimum. Visitors also park vehicles as it's now habituated to park immediately outside of my flat's walls. Kindly throw some light on my issue whether we may deny more than one vehicle parking from every flat so that no any rush occur and vehicles have to park immediately near my walls. May I keep some space reserved by keeping planting pots, in order to get some privacy as well as right to live in my flat purchased for recreation.