Gaithersburg, MD Swimming Pools & Spas: Pool Permits (2026)

The City of Gaithersburg takes pool permitting seriously due to the safety risks associated with residential swimming pools, and the permitting process is designed to ensure compliance with building codes, electrical safety standards, and child safety barrier requirements at every stage of construction. The building permit application is submitted to the Gaithersburg Permitting and Inspections Division at City Hall (31 South Summit Avenue) or through the city's online portal. A complete application must include a scaled site plan showing the proposed pool location with dimensions and distances to all property lines (to verify compliance with zoning setback requirements), the location and specifications of the required safety barrier or fence per Montgomery County Code Chapter 51, the location of electrical equipment (pump, filter, heater, control panel), proposed lighting, and the drainage plan showing how pool overflow and backwash water will be managed without flowing onto neighboring properties or into storm drains. A separate fence/barrier permit must be filed concurrently with the pool permit. The barrier must meet the 60-inch (5-foot) minimum height requirement for pools installed after January 1, 1990, with self-closing and self-latching gates having the latch mechanism on the pool side at a minimum height of 48 inches. The fence/barrier must be inspected and approved before the pool may be filled with water. An electrical permit is required for all pool electrical work, which must be performed by a licensed electrician holding a valid Maryland electrical license. Pool electrical requirements include a dedicated circuit for the pump and motor, GFCI protection for all pool-related outlets and equipment within a specified distance of the pool edge (per NEC Article 680), proper grounding and bonding of the pool shell, equipment, and nearby metal objects, and underwater lighting meeting UL safety standards. Plumbing permits may be required for the pool's water supply connection (typically a backflow-protected tap from the domestic water system), the drain system, and any gas connections for pool heaters. WSSC may require a separate fill permit or water meter reading before and after initial pool filling to properly account for the water use and ensure it does not trigger drought-restriction violations during restricted periods. The city conducts inspections at multiple stages of construction. For a typical in-ground gunite or concrete pool, the inspection sequence includes excavation and footings, steel reinforcement (rebar layout), plumbing rough-in (drain lines, return lines, skimmer connections), electrical rough-in (conduit, grounding, bonding), gunite or shotcrete application, coping and deck installation, barrier/fence installation, and final inspection before the pool may be used. Each inspection must pass before the next construction phase can proceed. Failed inspections require corrective work and re-inspection. The total permit processing time from complete application to initial permit issuance is typically 10 to 20 business days, though complex projects or applications requiring zoning variance may take longer.