Lot Yield Calculator

Calculate the number of buildable lots from raw acreage after deducting roads, open space, and unusable land.

Inputs

Total Acreage

acres

Unusable Land

Roads & Infrastructure

Required Open Space

Average Lot Size

Tab to move between fields

Results

Net Buildable Lots

Density (Lots/Acre)

3.25

Gross Lots (No Deductions)108

Lots Lost to Deductions43

Net Buildable Acres12

Net Buildable Area522,720 SF

Land Efficiency60%

How to Use This Calculator

Enter Total Acreage of the raw parcel.
Set Unusable Land % (wetlands, steep slopes, easements) to reduce gross area.
Enter Roads & Infrastructure % and Required Open Space % from zoning requirements.
Set Average Lot Size in square feet — larger lots yield fewer units but may command higher prices.
Review Net Buildable Lots and Density per Acre.
Use Net Lots in your pro forma revenue model and compare against zoning density limits.

How the result changes with Total Acreage

Total Acreage	Net Buildable Lots	Density (Lots/Acre)
1,000	3,267	3.27
3,500	11,434	3.27
6,500	21,235	3.27
9,000	29,403	3.27

What each input means

Total Acreage: Total raw acreage of the parcel.
Unusable Land: Percentage of land unusable (wetlands, slopes, easements).
Roads & Infrastructure: Percentage dedicated to roads, sidewalks, and utilities.
Required Open Space: Percentage required for parks, trails, and open space.
Average Lot Size: Target average lot size in square feet.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Total Acreage = 20, Unusable Land = 10, Roads & Infrastructure = 20, Required Open Space = 10 = 5 input(s) provided
Calculate Net Buildable Lots
Net Buildable Lots
65 = 65
Calculate Density
Density
3.25 = 3.25
Calculate Gross Lots
Gross Lots
108 = 108
Calculate Lots Lost to Deductions
Lots Lost to Deductions
43 = 43

Engine last updated August 5, 2026. Checked against 1 independently-derived test — how we verify calculators.

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