Impervious Surface Meaning for Home Permits

A surface that reduces water absorption, such as roofs, patios, driveways, pools, and some decks.

What to know

• Lot coverage and stormwater limits can affect additions, patios, sheds, pools, and driveway widening
• Some projects need drainage or grading review even when the structure is simple
• Ask whether gravel, pavers, or deck surfaces count locally

Questions to ask

• Does this apply to my property or project scope?
• Which office verifies impervious surface issues?
• Should this be resolved before I submit building permit drawings?

Helpful next steps

• Check the project guide for your scope
• Search local guides for your city or county
• Verify current requirements with the authority having jurisdiction

This page is general planning guidance, not legal, engineering, architectural, or code-compliance advice.