Pool Permit Information Any pool that is designed to hold twenty-four (24) inches of water or more requires a permit. Pools may also require a Grading and Stormwater Management Permit if they are over five hundred (500) square feet. Pool_Permit_Application_- Fillable Grading-SWM_Application_- Fillable Reimbursement Agreement - Fillable W9 Form Stormwater O & M - Engineered Stormwater O & M - Simplified