Chapter 13
Zoning and buildable area
Setbacks, lot coverage, floor area ratio and density
An explorable chapter on zoning math for the real estate exam: the buildable area inside the setbacks, lot coverage limits, floor area ratio and dwelling units per acre, worked on one lot.
- 13.1SetbacksThe lot, less a strip along each line
- 13.2Lot coverageA cap on the footprint
- 13.3Floor area ratioTotal floor area, as a multiple of the lot
- 13.4DensityUnits per acre, rounded down
- 13.5When the rules do not fitGrandfathered, permitted, excused, or changed
- 13.6Plan the lotEvery limit at once
- 13.7One lot, rule by ruleThe same four limits, worked on a new lot

