Building Permit
Official government authorization required before starting most structural, electrical, plumbing, or HVAC work.
A building permit is an official approval issued by a local government (usually the building department or department of public works) that authorizes a specific construction or renovation project. Permits ensure that work is designed and executed in compliance with local building codes, zoning ordinances, and safety standards. Most structural changes, electrical panel upgrades, plumbing work, and HVAC installations require a permit.
The permit process typically involves submitting plans, paying a fee (often 0.5–1% of project value), and having a building inspector visit the site at key stages—after framing, after rough-in mechanicals, and at final completion. The inspector signs off each stage, and a certificate of occupancy or final inspection card is issued when all work passes.
Skipping permits has serious consequences: the work may need to be torn out for inspection, unpermitted work can invalidate homeowner's insurance claims, and when you sell the home a real-estate disclosure or buyer inspection may reveal the unpermitted work, killing the sale or requiring costly remediation.
Real-World Example
Before breaking ground on their 400-square-foot addition, the homeowners paid $650 in permit fees and waited three weeks for plan approval from the city building department.