Virginia
Grading and Drainage Plan
Stamped grading and drainage plan for building permits, showing finished grades, slopes, swales and where water goes.
What the work involves
A grading and drainage plan shows existing and proposed elevations, slopes away from buildings, swales, inlets, pipes and outfalls. Many jurisdictions require one for new homes, additions, pools and commercial projects, sometimes with calculations showing runoff does not increase. It is prepared by a civil engineer from a topographic survey.
Local conditions we plan for
- Coastal flooding, land subsidence and sea level rise in Hampton Roads
- Hurricanes
- Karst in the Shenandoah Valley
- Expansive marine clays in Northern Virginia
Building code: 2021 IBC/IRC adopted at the state level (ICC adoption chart, April 2026).
When you need it
- Building permit requires a grading and drainage plan
- New home, addition or pool changing site grades
- Adding driveway, patio or other impervious area
- Lot drains toward a neighbor or the house
Frequently asked questions
How much does grading and Drainage Plan cost?
Across the US, grading and Drainage Plan usually costs $800 to $5,000. Estimate for residential plans; commercial grading plans are typically part of a larger site plan fee. Survey costs are separate.
How long does grading and Drainage Plan take?
Plan on 1 to 4 weeks from signed proposal to stamped deliverables, longer if a site visit, soil testing or a permit review cycle is involved.
Do I need a licensed PE for grading and Drainage Plan?
In most US jurisdictions, yes. When the work needs a permit, the plans, calculations or report usually must be sealed by a Professional Engineer licensed in the state where the project is located. Every deliverable we issue for permit is sealed that way.
How do I verify an engineer's license in Virginia?
Engineers practicing in Virginia are licensed by the Board for Architects, Professional Engineers, Land Surveyors, Certified Interior Designers and Landscape Architects (APELSCIDLA). You can confirm a license number and its status in the board's public license search before you sign a contract.
Which building code applies in Virginia?
2021 IBC/IRC adopted at the state level (ICC adoption chart, April 2026). Cities and counties can add local amendments, which is one reason to hire an engineer who works in your area.
What site problems do engineers see most in Virginia?
Common issues include coastal flooding, land subsidence and sea level rise in Hampton Roads, hurricanes, karst in the Shenandoah Valley and expansive marine clays in Northern Virginia.