Grading Plan
A drawing showing how the site's ground surface will be reshaped.
Quick Answer
A grading plan is a civil drawing that shows existing and proposed ground elevations for a site, using contour lines and spot elevations. It defines where earth is cut or filled, how water drains away from buildings, and the finished slopes of pavement and walkways, and it is the basis for earthwork quantities.
The Full Picture
A grading plan translates the engineer's intent for the ground surface into measurable information. Existing contours, typically shown as dashed lines, are drawn next to proposed contours, typically shown as solid lines, so a reader can see where the ground will rise or fall. Spot elevations, finished floor elevations, slopes, and drainage flow arrows give precise targets at key points.
Drainage is a main driver. Surfaces must slope so water moves away from buildings toward swales, inlets, and the stormwater system. Accessibility adds limits: under the 2010 ADA Standards for Accessible Design, accessible walking surfaces generally have a running slope no steeper than 1:20 (5 percent) and a cross slope no steeper than 1:48 (about 2 percent), unless they are designed as ramps. Pavement, parking areas, and building entrances all have to fit those slope rules.
Designers often try to balance cut and fill on a site, since hauling soil off or importing it is expensive. The grading plan, along with the geotechnical report, shows how much soil must move, what must be compacted, and where unsuitable soils must be removed. It also coordinates with the utility plan so pipes have adequate cover and slope.
Contractors use the grading plan to price and build the earthwork, set grade stakes, and verify finished surfaces. Precon teams compare existing and proposed surfaces to estimate cut and fill volumes, and check that proposed elevations match building floor elevations, entrances, and adjacent sites. Mismatches between civil, architectural, and landscape drawings are a common source of RFIs.
Real Examples
Common Misconceptions
People assume: A grading plan is only about moving dirt.
Actually: It also governs drainage, accessibility, building floor elevations, and tie-ins with neighboring properties and utilities.
People assume: Contour lines show the same thing as spot elevations.
Actually: Contours show the overall shape of the surface. Spot elevations give exact heights at specific points, such as curb corners or building entries, and the two work together.
Does MeltPlan Solve This?
Partially — adjacentMeltPlan's takeoff service works from plans, and earthwork quantity calculation is part of the quantity work it supports, with US-based estimators reviewing the output. It does not create grading plans or engineer drainage, which remain civil engineering tasks.
Get earthwork quantities from your plans →Frequently Asked Questions
What does a grading plan show?
Existing and proposed contours, spot elevations, slopes, drainage directions, finished floor elevations, and often swales, inlets, and retaining walls.
What is cut and fill?
Cut is soil removed to lower the ground, and fill is soil added to raise it. The difference between them determines whether soil must be hauled off or imported.
Who prepares the grading plan?
A licensed civil engineer, usually working from a topographic survey and the geotechnical report.
How do estimators use a grading plan?
They compare existing and proposed surfaces to estimate earthwork volumes, and they use the plan to price drainage, paving, and subgrade preparation.