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Site Plan vs Floor Plan: What Contractors Need to Know

Site plans and floor plans answer different questions. Here's what each shows, when a job needs which, and how to draw both without CAD software.

June 13, 20266 min read

Two drawings, two questions

A site plan answers 'where on the property?' It's a top-down view of the whole lot: boundary, structures, driveway, and the distances between them. A floor plan answers 'how is the space arranged?' It's a top-down view inside a structure: walls, rooms, openings, and their dimensions.

Contractors mix the names up constantly, and permitting offices don't — asking for the wrong drawing type is one of the most common reasons small permit applications bounce.

What a site plan shows

The property boundary with lot dimensions, existing structures at their footprints, setback distances from structures to property lines, driveways and hard surfaces, and the proposed work located precisely on the lot. Fences, decks, additions, pads, pools, and detached structures are all site plan territory.

Rule of thumb: if the work changes what sits on the land or where, the drawing is a site plan.

  • Property lines and lot dimensions
  • Existing structures and their setbacks
  • Proposed structures or work areas
  • Driveways, walkways, and hard surfaces
  • Relevant easements or right-of-way notes

What a floor plan shows

Exterior walls at the building's footprint, interior walls dividing the rooms, door and window openings, room names, and dimensions on the walls that matter. Kitchen remodels, basement developments, room additions (interior portion), and layout changes are floor plan territory.

Rule of thumb: if the work changes how space inside a structure is arranged, the drawing is a floor plan.

Many jobs need both

An addition is the classic example: the site plan shows where the addition sits on the lot and its setbacks; the floor plan shows the new interior layout. Decks often want both too — a site plan for the permit, a construction-oriented layout for the build.

In SiteBuildHub Draft the two are just different templates on the same tools. Draw the site plan from the residential site plan template and the floor plan from the floor plan template, save both in the project, and export both PDFs into the same quote.

Ready to draw your next job?

SiteBuildHub Draft lets you create site plans, floor plans, deck and fence layouts, and takeoff sketches in your browser — no CAD software required.

SiteBuildHub provides planning tools and general information, not professional advice. Drawings may require review by licensed professionals depending on local rules — check building codes and permit requirements, and contact your local utility locate service before any excavation.

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