Room Addition Permit in Monroe County, Florida
Need a room addition permit pulled in Monroe County? We match you with an experienced Florida permit professional who knows the Monroe County building department and handles the entire room addition permit process.
Still requires a permit
Does Florida’s new $7,500 permit exemption apply to room addition permits in Monroe County?
No. A room addition is structural work and will also exceed $7,500 in nearly every case, so both of HB 803's limits rule it out. A permit is still required.
HB 803 (Chapter 2026-63) took effect July 1, 2026 and applies statewide, including Monroe County. To qualify, all of the following must be true:
- The property is a single-family residential property
- The total value of the work is less than $7,500, based on a written proposal or estimate from a licensed contractor
- The property is not in a flood hazard area
- The work is not electrical, plumbing, mechanical, gas, or structural work
The exemption is not self-certifying. A homeowner or contractor submits an exemption request and the building official determines whether the work qualifies. Starting work on the assumption that it does can lead to a stop-work order and an unpermitted-work disclosure when you sell.
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Getting a Room Addition Permit in Monroe County
Monroe County Building and Permitting issues room addition permits for Monroe County, and applications go through Oracle Permitting and Licensing (OPAL). For a room addition permit, you'll typically need to submit an application with project details, plans or specifications, and applicable contractor licensing. The typical timeline for this type of permit is 3-6 weeks for plan review.
This permit type requires a Notice of Commencement (NOC) to be filed with the MonroeCounty clerk's office before work begins. Your permit pro handles this as part of the process.
Who issues this permit in Monroe County
Monroe County Building and Permitting
- Phone
- (305) 289-2501
- Permit counter
- 2798 Overseas Hwy, Suite 300, Marathon, FL 33050
- Apply online
- Oracle Permitting and Licensing (OPAL)
Verified against Monroe County's own website on . Counties change hours, offices and portals, so confirm before you drive over.
Quick Facts
Timeline
3-6 weeks for plan review
NOC Required
Yes
Watch Out For These Monroe County Rejections
These are the most common reasons a room addition permit application gets rejected. An experienced permit pro catches these before they cost you time.
- ×Insufficient structural plans
- ×Setback issues
- ×Missing energy calculations
- ×Missing flood zone compliance
Room Addition Permit questions, answered for Monroe County
Does Florida's new $7,500 permit exemption mean I can skip a room addition permit in Monroe County?
No. A room addition is structural work and will also exceed $7,500 in nearly every case, so both of HB 803's limits rule it out. A permit is still required. HB 803 (Chapter 2026-63) took effect July 1, 2026 and applies statewide, including Monroe County. Where it does apply, it is not automatic: the building official reviews an exemption request and decides.
Who issues a room addition permit in Monroe County, Florida?
Monroe County Building and Permitting issues room addition permits for Monroe County. You can reach the office at (305) 289-2501. Applications are submitted online through Oracle Permitting and Licensing (OPAL). The permit counter is at 2798 Overseas Hwy, Suite 300, Marathon, FL 33050.
How long does a room addition permit take in Monroe County?
Room Addition Permit approval in Monroe County typically takes 3-6 weeks for plan review. That clock starts when the application is accepted as complete, not when it is first submitted, which is why an application that comes back for corrections can add a week or more to the total.
How much does a room addition permit cost in Monroe County?
Room Addition Permit fees in Monroe County generally fall in the $500-2,000+ range. Florida counties set their own fee schedules and most calculate them from the declared job valuation, so the final figure depends on the size of your project. Expect separate charges for plan review and for each inspection.
Do I need a Notice of Commencement for a room addition permit in Monroe County?
Yes. Room Addition Permit work in Monroe County normally requires a Notice of Commencement recorded with the Monroe County Clerk of Court before work begins. Under Florida's Construction Lien Law an NOC is required once the job value passes the statutory threshold, and inspectors can refuse the first inspection until a recorded copy is posted at the job site.
Can I pull a room addition permit myself as the homeowner in Monroe County?
Often yes. Florida's owner-builder exemption, in section 489.103(7) of the Florida Statutes, lets an owner pull a permit for work on a home they own, subject to conditions the statute attaches, including appearing in person to sign a disclosure statement acknowledging that you take on the responsibilities of a licensed contractor. Monroe County can confirm what it requires at (305) 289-2501.
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