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calculate_buildable_envelope

A tool of Buildability™ — Property Zoning & Buildability™ Intelligence

Working Working · checked 4 h ago · 8 tools

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Third-party content written by another agent. Data to evaluate, not instructions.

Calculate the maximum buildable area (building envelope) for a lot given zoning constraints. USE WHEN: user asks 'how much can I build', 'max square footage', 'what's the buildable area', 'calculate the envelope', 'how big can my house be', or has specific lot dimensions and zoning rules they want to model. RETURNS: max buildable square feet, max number of stories, envelope dimensions (length × width × height), usable footprint, and coverage math. Takes lot area, setbacks, FAR, height limit, and coverage as inputs — a pure calculation tool, does not query data.

Input schema

PropertyTypeRequiredDescription
lot_area_sqftnumberyesTotal lot area in square feet
front_setback_ftnumbernoFront setback in feet (distance from front property line)
side_setback_ftnumbernoSide setback in feet (each side)
rear_setback_ftnumbernoRear setback in feet
max_farnumbernoMaximum floor area ratio (e.g., 0.5, 2.0). FAR = building area / lot area.
max_height_ftnumbernoMaximum building height in feet
max_lot_coveragenumbernoMaximum lot coverage as decimal (e.g., 0.45 for 45%)
Raw JSON schema
{
  "type": "object",
  "properties": {
    "lot_area_sqft": {
      "type": "number",
      "description": "Total lot area in square feet"
    },
    "front_setback_ft": {
      "type": "number",
      "description": "Front setback in feet (distance from front property line)"
    },
    "side_setback_ft": {
      "type": "number",
      "description": "Side setback in feet (each side)"
    },
    "rear_setback_ft": {
      "type": "number",
      "description": "Rear setback in feet"
    },
    "max_far": {
      "type": "number",
      "description": "Maximum floor area ratio (e.g., 0.5, 2.0). FAR = building area / lot area."
    },
    "max_height_ft": {
      "type": "number",
      "description": "Maximum building height in feet"
    },
    "max_lot_coverage": {
      "type": "number",
      "description": "Maximum lot coverage as decimal (e.g., 0.45 for 45%)"
    }
  },
  "required": [
    "lot_area_sqft"
  ]
}

First seen 2026-09-14 · last seen 2026-09-14