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Topographic survey
A topographic survey is a detailed map showing elevation changes, contour lines, and natural features of the land.
Why it matters
It reveals slopes, drainage patterns, and high or low spots that determine foundation type, grading needs, and buildable area.
Where people get this wrong
A topographic survey shows elevation and terrain. A boundary survey shows property lines. You may need both before building.
Real-world example
The topographic survey shows a 6-foot elevation drop from front to back across the lot, making a walkout basement possible on the downhill side.
Where this hits your build
This matters during site work and foundation. Mistakes here get buried and are expensive to fix later. Pay attention before concrete is poured.
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