Free Tool

Home Battery Permit Cost Estimator

Get a line-by-line breakdown of expected permitting costs for your home battery project — state-specific and updated for 2025.

1. Which state is your property in?

2. What is the estimated total project cost (equipment + installation)?

3. Does your project include solar panels?

4. What is the size of your city?

💰 Your Estimated Permit Costs

How Permit Fees Are Calculated

Home battery permit fees vary by state and city. There are three main calculation methods: flat fee (a fixed dollar amount regardless of project size — common in the Midwest and South), valuation-based fee (a percentage of the project cost — common in California and the Northeast), and unit-based fee (based on number of circuits added — less common). This estimator uses the most common method for your state and city size.

The permit fee itself is only part of the total permitting cost. Inspection fees, installer permit-handling charges, and in some states utility interconnection application fees add to the total. See our complete permit cost guide for a detailed breakdown.