നിർമ്മാണ ആസൂത്രണം

Legal setback minimums are set by each state/city's municipal building byelaw (e.g. Tamil Nadu's TNCDBR/CMDA, Karnataka's BDA ring-zone system) and vary further by plot size, road width, building height, and zone classification. No figure is shipped here; the Construction Planning tool should present this as an explainer plus a 'check your local municipal byelaw / sanctioned building plan' call to action, not a number.

FSI/FAR (Floor Space Index / Floor Area Ratio) is entirely municipal-law-governed and varies by city, zone, plot size, and building type/height. No classical or T2 Vastu source makes any FSI/FAR-style claim -- this is a modern civic-planning concept with no Vastu analogue. No figure is shipped here.

Not a duplicate of the plot-center-avoidance notes already recorded in staircase_rules_v1.json and borewell_rules_v1.json's relative_positioning.plot_center_avoidance -- this entry is the Plot Utilization topic's cross-reference to that same doctrine, documenting why Vastu has a genuine (if non-numeric) opinion on open-vs-built space distinct from the municipal FSI/FAR question. Five independently-worded sources converge: the Brahmasthan (plot center) should be kept vacant, ideally open to sky, free of construction -- no septic tank, underground water tank, boring, pillar, ladder, beam, or balcony should sit there, and a toilet/bathroom at the Brahmasthan is called out as a significant Vastu flaw. Multiple sources connect this doctrine directly to the traditional South Indian open/semi-open courtyard-house form. If a plot cannot spare open space at the exact center, sources recommend biasing whatever open space remains toward North/East -- directly consistent with, not a duplicate of, open_space_zone_preference above.