A plot plan — also called a site plan, house location plan, or lot grading plan depending on the jurisdiction — is a technical drawing showing the position of a home on a specific lot. It shows the building footprint placed within the lot boundaries, with all required setbacks dimensioned from property lines, the driveway location, easements, and any grading or drainage information required by the local building department.

For production builders, a plot plan is required for every permit submission and must be produced individually for every lot, accurately reflecting the specific house type, elevation, garage orientation, and options being built on that plot.

What a plot plan shows

A production builder plot plan typically includes the lot boundaries and dimensions taken from the subdivision plat, the building footprint positioned on the lot with setbacks dimensioned from all applicable property lines, the garage location and driveway approach, any easements, drainage swales, or utility corridors shown on the plat, the finished floor elevation if required, a legal description of the lot including subdivision name and lot and block numbers, the site address, a north arrow, a scale, and any jurisdiction-specific notation required by the local building department.

When plot plans need to be updated

A plot plan must be produced for every new lot permit submission. It must be updated whenever the building footprint changes — due to a structural option that extends the home, a garage hand change that moves the driveway, an elevation change that adds a porch, or any other modification that affects the position or outline of the home on the lot.

In production housing, where buyers frequently select options that modify the footprint, plot plan production and modification is a high-volume, recurring task.

Plot plans vs surveys

A plot plan is a construction document prepared by the builder showing the proposed position of the home on the lot. A survey is a measured record of the lot boundaries and existing conditions prepared by a licensed surveyor. For most residential permit submissions, a plot plan prepared from the recorded plat is sufficient. Some jurisdictions require a licensed surveyor's stamp on the plot plan or a separate setback survey at foundation stage.

Outsourcing plot plan drafting

For production builders processing dozens or hundreds of lots per month, plot plan drafting is one of the highest-volume drawing tasks in the programme. Outsourcing plot plan production to a specialist CAD company provides consistent quality, fast turnaround, and the capacity to handle peak workloads without maintaining a large in-house drafting team.