Description
Subtract frontSetback and rearSetback from parcelDepth for buildableDepth.
Urban-design quantities depend on the measured boundary and denominator. Building height, parcel area, street width, and setbacks describe different geometric constraints and should use a common length or area basis.
Subtract frontSetback and rearSetback from parcelDepth for buildableDepth.
When to use this tool
Use Parcel Frontage Setback Depth when you need one planning geometry component from supplied dimensions before a wider design review.
How to use the tool and how it works
- Enter parcelDepth, frontSetback, rearSetback. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read buildableDepth, fits. Inspect fits before interpreting the associated values.
Subtract frontSetback and rearSetback from parcelDepth for buildableDepth. Set fits when their sum does not exceed parcelDepth.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| parcelDepth | Parcel Depth | Required. Finite number; minimum 0. |
| frontSetback | Front Setback | Required. Finite number; minimum 0. |
| rearSetback | Rear Setback | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| buildableDepth | Buildable Depth | Required. Finite number. |
| fits | Whether this specific supplied size comparison passes. | Required. Boolean. |
{
"input": {
"parcelDepth": 40,
"frontSetback": 6,
"rearSetback": 4
},
"output": {
"buildableDepth": 30,
"fits": true
}
}Limitations and assumptions
- Negative buildable depth is diagnostic; lateral limits, easements, topography, and legally required setbacks are not determined.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Check the applicable survey, planning rules, and professional design assessment before using the result in a project.
References
Similar or alternative tools
- Parcel Streetwall Stepback Offset
Subtract lowerFacadeOffset from upperFacadeOffset for stepback.
- Street Section Space Remainder
Subtract carriagewayWidth and sidewalkTotalWidth from rightOfWayWidth for remainingWidth.