Know Your Building Line The building line is the invisible boundary that decides where your walls may stand. BuildingLine explains setbacks, property lines, and zoning limits in plain language before you pour a footing.

A boundary, usually set by zoning or a plat, beyond which a building may not extend toward the street or lot lines — also called a setback line.

Check your plat map, property survey, or local zoning office. Rules differ by municipality and even by street.

No — everything here is educational, not professional advice. For a real project, consult your local zoning authority, a surveyor, or a land-use attorney.