Is a preliminary site plan the same as a survey?

No. A survey establishes boundary or topographic evidence under the applicable professional standards; a preliminary site plan tests a concept using identified sources and assumptions.

Can I use one for a permit?

Some jurisdictions accept simple owner-prepared plot plans for limited work, while others require survey, design or engineering. Ask the reviewing agency what it requires for the specific project.

How accurate should the house footprint be?

Use the complete exterior footprint at a verified scale, including garages, porches and other projections that affect setbacks, coverage or access.

When should I create it?

Create it before committing to a lot or final house option, then update it when survey, title, zoning or design information becomes authoritative.

Preliminary Site Plans: Scope, Uses and Next Steps

Learn what a preliminary site plan should show, how builders and lot owners use it to test feasibility, and what must be verified before design and permitting.

What makes a site plan preliminary

A preliminary plan is an option-testing document, not an approval document. It can combine mapped parcel geometry, a scaled building footprint, assumed or researched setbacks, public terrain, flood context and conceptual improvements. Every input should retain its source so the reader can distinguish a measured drawing from an estimate, a user entry or a mapped approximation.

The minimum useful drawing

At minimum, show the parcel, street frontage, north, scale, required yards, the complete building footprint, garage location, driveway concept and controlling clearances. Add contours, finished-floor assumptions, grading limits, coverage, easements and utilities whenever those conditions could change the answer. A rectangle labeled with living area is not a meaningful house-fit test.

Decisions it can support

Builders use preliminary plans to screen lots against model homes, compare orientations and identify exceptional site costs. Property owners use them to decide whether a house concept deserves further diligence. Designers and engineers use them to begin with an explicit option rather than reconstructing an unscaled sketch or a verbal description.