A site plan is a contract written in lines and numbers. Most homeowners glance at it, recognize the rectangle that's going to be their house, and trust the rest. Then six months later they find out the deck setback they didn't see on the drawing is the reason the inspector won't sign off. Reading the plan is a 20-minute skill that pays back every time.
This is what to look for before you let an excavator start on a lot in Ringgold, Hixson, or anywhere else in the region.
If any of those five are missing, the plan isn't done. Don't dig from a plan that doesn't have all five.
Contour lines are the squiggly lines with numbers. Each line represents a single elevation — every point on that line is at that height above sea level (or a local benchmark). On most residential plans, contours are drawn every 1 or 2 feet of vertical change.
Three things to notice:
Every jurisdiction has minimum distances from property lines. Front, side, and rear setbacks are usually different numbers. Look for dashed lines parallel to the property lines, often labeled with feet. The buildable area is what's left in the middle.
Easements are different. An easement is a strip across your lot where someone else has rights — utility company, neighbor, drainage flow. You can usually still landscape it, but you generally can't build over it. Watch for "10' utility easement" or "20' drainage easement" notes.
Look for:
If your plan shows utilities, that's helpful but not enough. You still need to call 811 for a fresh locate — site plans aren't always accurate, and lines move over time. We cover that in detail in why utility locates matter.
Two contour sets often overlay each other:
Where they diverge, dirt is going to move. Existing line at elevation 712 turning into a proposed line at 716 means 4 feet of fill in that spot. Existing at 720 going to proposed at 715 means 5 feet of cut. This is how you read cut and fill volume directly off the plan.
Don't skip the legend in the corner. It explains symbols you'd otherwise guess at — trees to remove, trees to save, retaining wall lines, swale arrows, silt fence routes.
Read the notes block too. It often contains the critical sentences: "Contractor to verify elevations in field," "Erosion control per local stormwater rules," "Maintain 6 inches fall in 10 feet from foundation."
When we walk a site with a homeowner or builder, the conversation goes faster if you bring:
A clear 30-minute walk catches things that would cost days to fix later. For complex builds, the same conversation belongs in your building pad and footings planning.
For a single driveway extension or a shed pad, sometimes a sketch is enough. For anything that needs a permit — house, addition, pool, large structure — a site plan is usually required.
Typically a surveyor or civil engineer. Some builders draw their own for permitting. Architects produce them for the building itself.
Small adjustments, yes — to dodge a rock shelf, save a tree, or improve drainage. Changes that move building footprint or grades should go back to the designer.
A reference elevation everyone agrees on — often a survey monument, a manhole rim, or a marked stake. All other elevations are measured relative to it.
