Building Permits Explained: What You Need, How Long They Take, What They Cost

Building permits are governmental authorizations to construct, alter, or demolish a structure. They exist to ensure construction meets minimum health and safety standards — structural integrity, fire separation, electrical safety, plumbing codes — that protect both the occupants and future buyers.

Skipping permits is not a viable strategy for new construction. Unpermitted work is discovered when you sell — title companies and buyers' attorneys routinely flag gaps in permit history. Lenders will not finance homes with known unpermitted construction. In some jurisdictions, unpermitted structures must be demolished or have all work exposed for inspection at the owner's expense. The short-term savings from skipping a permit are almost always outweighed by long-term consequences.

A new home typically requires a building permit (the master permit covering structural work), a plumbing permit, a mechanical permit (HVAC), an electrical permit, and in many jurisdictions, a separate grading or site work permit. Some counties also require a septic permit if you are not connecting to municipal sewer.

Each permit triggers a set of inspections at specific construction milestones. Foundation inspections happen before concrete is poured. Framing inspections happen before insulation goes in. Rough mechanical inspections (plumbing, HVAC, electrical) happen before drywall closes the walls. A final inspection happens after all work is complete and must pass before a Certificate of Occupancy is issued.

Missing an inspection — say, closing drywall before the rough electrical inspection — typically requires opening the wall for the inspector. This is expensive and entirely preventable with a good inspection schedule.

Permit fees are calculated as a percentage of construction value in most jurisdictions, typically 0.5–2% of the permitted value. On a $400,000 home, that is $2,000–$8,000 just for the base permit fee. But that is rarely the full cost.

Impact fees are charged by many municipalities to offset the infrastructure costs new residents create — roads, schools, water, sewer capacity. In fast-growing Sun Belt cities, these can be substantial: $10,000–$25,000 in parts of Florida, Texas, and Georgia. Some California jurisdictions charge $40,000–$75,000 in combined fees before you pour a single yard of concrete.

Utility connection fees — hooking into municipal water, sewer, electric, and gas — add another $3,000–$15,000 in most markets. Rural lots connecting via long runs add more. Budget 2–5% of total project cost for all permits and fees combined.

Submit complete, accurate construction documents the first time. The single biggest cause of permit delays is missing or insufficient information on the application. Work with your architect to ensure every jurisdiction-required document is included — site plan, floor plans, elevations, energy compliance calculations, structural calculations — before submission.

Hire an expediter for complex projects in slow jurisdictions. In markets like Los Angeles, San Francisco, and New York City, permit expediters — professionals who specialize in navigating local building departments — can compress timelines from 6+ months to 3–4 months. Their fee ($3,000–$8,000) typically pays for itself many times over in reduced carrying costs.

Pre-application meetings are available in many jurisdictions and are almost always worth taking. A one-hour meeting with a plan checker before submission can identify issues that would otherwise cost you weeks of revision cycles.