Adjust zoning rules — height limit, FAR, setbacks. The envelope redraws as a 3D containing cell. The building (orange) fills whatever volume the envelope allows. Cells inside cells.
Site section · Envelope vs Building—
Zoning rulepack
Height limit
Max building height65′
Max FAR
Floor area ratio3.0
Front setback
Distance from ROW15′
Side setback
Distance from property line10′
Coverage limit
Max lot coverage80%
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Envelope → Building impact
Envelope vol
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Building vol
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Max floors
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Max units
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The envelope is a cell. The building is the occupant. Change the rules, the envelope updates. Change the envelope, the buildable area updates. Cells inside cells — same logic at every scale.