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