Diligence · Glossary
Percent Slope
Updated 2026-07-20
Percent slope equals rise over run × 100. A 100% slope is a 45° angle. Local codes often set cut/fill and driveway limits by percent slope.
What it means
Percent slope equals rise over run × 100. A 100% slope is a 45° angle. Local codes often set cut/fill and driveway limits by percent slope.
Why it matters for land decisions
Confirm how the concept applies to your specific parcel with the city or county planning department and the controlling agency map or ordinance.
- Treat online GIS as a first-pass screen.
- Verify before design, escrow, or lending decisions.
People also ask
What is Percent Slope?
Percent slope equals rise over run × 100. A 100% slope is a 45° angle. Local codes often set cut/fill and driveway limits by percent slope.
Is a GIS overlay enough to decide?
No. Public GIS is a screening tool. Official determinations come from the governing agency, recorded documents, and licensed professionals when required.
Official sources
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