Research by DoINeedAPermit Research Team · Updated May 2026
The Short Answer
Every new window or door opening in Clermont requires a building permit — this is a structural change, not a simple replacement. You will need header calculations, framing plans, and wind/impact glazing specifications if you are within the hurricane zone.
Clermont sits on the boundary between Florida's High-Velocity Hurricane Zones (HVHZ) and inland territory, and the City of Clermont Building Department has strict water-intrusion and wind-resistance rules that differ from neighboring counties. If your property is within the HVHZ overlay — which includes much of Clermont's downtown and waterfront areas near Lake Minneola — you are required to install impact-resistant glazing rated to the design wind speed (typically 140+ mph for this zone), not just regular tempered glass. This is a city-specific enforcement point: the Department cross-references the FEMA flood zone maps and HVHZ designation against your address before issuing permits, and omitting impact certification will trigger a plan rejection. Additionally, Clermont's sandy-loam and limestone-karst soil means that foundation loads shift under new openings; the Department requires header calculations certified by a Florida-licensed engineer or architect if the opening cuts through a load-bearing wall or if the existing framing is wood-truss (common in 1990s subdivisions). Unlike some neighboring municipalities that accept stock headers, Clermont's reviewers routinely ask for a structural letter or calculation sheet showing header size, spacing, and attachment — plan on 1–2 weeks for this review cycle alone.

What happens if you skip the permit (and you needed one)

Clermont new window or door opening permits — the key details

The foundation of any new window or door opening permit in Clermont is the structural requirement: you cannot simply cut a hole in an exterior wall without addressing what the wall is currently holding up. Per Florida Building Code (FBC) Chapter 6 (based on IRC R602), every exterior wall is assumed to be load-bearing unless proven otherwise; if your new opening removes more than 50% of the wall's height in any 4-foot vertical span, you must install a header (beam) to transfer the load to the studs on either side. Clermont's Building Department asks for one of three things: (1) a structural engineer's letter stating the header size (e.g., '2x12 rim board with (2) 2x10 LVL' or pre-fabricated header); (2) a simplified calculation from a licensed designer showing the load path; or (3) a reference to a code-approved pre-engineered header chart if the opening is small and the wall is non-load-bearing. Most residential openings are 3–4 feet wide, which typically require a 2x10 or 2x12 header depending on wall height and roof load. The Department's plan reviewers will ask for the opening dimensions (width and height), the wall type (wood stud, concrete, masonry), the roof span, and whether there is a second story above — without this, they will issue a preliminary rejection with a checklist.

Every project is different.

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City of Clermont Building Department
Contact city hall, Clermont, FL
Phone: Search 'Clermont FL building permit phone' to confirm
Typical: Mon-Fri 8 AM - 5 PM (verify locally)
Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current new window or door opening permit requirements with the City of Clermont Building Department before starting your project.