Building Permit Guide for Seminole County, Florida (2026)

Seminole County is one of Central Florida's most established and desirable places to live, stretching from the shores of Lake Monroe in Sanford south through the communities of Oviedo, Winter Springs, Casselberry, and Altamonte Springs. If you own a home or are planning a construction or renovation project anywhere in Seminole County, understanding the local building permit process before work begins is essential. This guide covers everything homeowners and contractors need to know about Seminole County building permits in 2026, including how the new Florida HB 803 exemptions apply locally.

Who Issues Building Permits in Seminole County?

Seminole County's Development Services Building Division issues building permits for the unincorporated areas of the county — land that falls outside the boundaries of any incorporated city or town. However, Seminole County contains seven incorporated municipalities, each operating its own independent building department:

• City of Altamonte Springs
• City of Casselberry
• City of Lake Mary
• City of Longwood
• City of Oviedo
• City of Sanford
• City of Winter Springs

If your property address falls within one of these cities, you must apply for your building permit through that city's building department — not through the county. Before submitting any application, verify your property's jurisdictional status using the Seminole County Property Appraiser's website (scpafl.org), which allows address lookups that show whether you're in unincorporated county territory or within an incorporated city. Submitting to the wrong jurisdiction is one of the most common delays homeowners encounter.

What Projects Require a Building Permit in Seminole County?

Unincorporated Seminole County follows the Florida Building Code, which means permits are required for the vast majority of construction, renovation, and installation work. Projects that consistently require a permit include:

• Roof replacements: All re-roofing projects — full tear-offs and overlays — require a permit and a series of inspections in Seminole County
• Swimming pools and spas: Both in-ground and above-ground pool installations require a building permit, plus compliance with Florida pool barrier requirements
• Electrical work: Panel upgrades, new circuits, EV charger installations, and standby generator hookups all require an electrical permit
• Plumbing: Water heater replacements, new fixture additions, and drain line repairs require a plumbing permit
• HVAC systems: New system installations and equipment replacements require a mechanical permit
• Fences: Most fences require a permit in unincorporated Seminole County, with setback and height requirements that vary by zoning district
• Room additions and structural modifications: Any expansion of your home's footprint or changes to load-bearing structures require a building permit with full plan review
• Screen enclosures and lanais: Patio and pool enclosures require a permit and must meet Florida's wind-load design requirements with engineer-stamped drawings
• Sheds and accessory structures: Sheds 100 square feet or larger generally require a permit in Seminole County
• Solar panel systems: Rooftop and ground-mounted solar installations require both a building permit and an electrical permit

Minor cosmetic work — interior painting, standard flooring replacement, and cabinet work not involving plumbing or electrical — typically does not require a permit. The scope of no-permit work was expanded in 2026 under Florida HB 803 for qualifying projects valued under $7,500, as described below.

How Does the Florida HB 803 Exemption Apply in Seminole County?

Florida House Bill 803, signed by Governor DeSantis in May 2026 and effective July 1, 2026, created a new permit exemption for certain residential projects valued under $7,500 on single-family homes. Seminole County is required to honor this exemption under state law, but the exemption is narrower than many homeowners expect. It does not apply to:

• Electrical, plumbing, mechanical, structural, or gas work — at any project cost
• Properties located in a FEMA-designated Special Flood Hazard Area
• Projects that are intentionally divided to stay under the $7,500 threshold
• Work inside a homeowners association that prohibits such work without a permit (HOAs retain separate authority over architectural standards)

To use the exemption in Seminole County, you must submit a written exemption request to the Building Division before starting work. The exemption removes the permit paperwork but does not remove the obligation to build to code. For a complete breakdown of how this law works statewide, read our guide to Florida's $7,500 permit exemption under HB 803.

Seminole County also benefits from HB 803's new 5-business-day mandatory review timeframe for permit applications covering work valued under $15,000 on existing single-family residences — a change designed to speed up approvals for smaller residential projects.

How Do You Apply for a Building Permit in Seminole County?

As of December 2025, Seminole County transitioned to mandatory electronic plan review through its ePlan platform. All building permits for unincorporated Seminole County must now be submitted electronically — in-person paper submissions for new permit applications are no longer accepted. The ePlan system allows licensed contractors to submit applications, upload construction plans, pay fees, track review status, and schedule inspections online, 24 hours a day, seven days a week.

The basic permit application process in Seminole County:

1. Confirm jurisdiction: Verify through scpafl.org that your property is in unincorporated Seminole County and not within an incorporated city limit.
2. Prepare your application package: This typically includes the completed permit application, a site plan showing the property's boundaries and setbacks, construction drawings (engineer-stamped for structural work), contractor license and insurance documentation, and product approval numbers for any specified materials.
3. Submit through ePlan: Create or log in to your ePlan account at Seminole County's Development Services portal and upload all required documents.
4. Pay fees: Permit and plan review fees are collected at the time of application through the online portal.
5. Plan review: County staff reviews your plans for compliance with the Florida Building Code and local zoning requirements. Reviewers may issue comment letters requesting corrections or additional information.
6. Permit issuance: Once approved, download your permit from ePlan. Post the permit card at the job site in a visible location before construction begins.
7. Schedule inspections: Request inspections at required milestones through the online portal or by calling the Building Division at (407) 665-7050. All inspections must pass before the permit can be finaled and closed.

For most projects, Seminole County also requires a Notice of Commencement (NOC) recorded with the Seminole County Clerk of Courts before construction begins. The NOC protects you as the property owner from mechanic's liens filed by unpaid subcontractors or suppliers. Your contractor typically handles this, but confirming it is on file before work starts is your responsibility as the owner.

How Long Does a Building Permit Take in Seminole County?

Processing times depend on the complexity of your project and whether your initial application is complete:

• Simple residential permits (water heater, straightforward re-roof, like-for-like HVAC replacement): typically 5 to 10 business days
• Projects valued under $15,000 on existing single-family homes: subject to a mandatory 5-business-day initial review response under Florida HB 803 (effective July 1, 2026)
• Full plan review projects (room additions, new pools, screen enclosures, structural modifications): typically 3 to 6 weeks, depending on application completeness and current workload
• New residential construction: 4 to 8 weeks or more for initial review, with multiple comment-and-resubmit rounds possible before final approval

Submitting a complete, accurate application on the first try is the most effective way to avoid delays. The most common reasons for rejection or comment letters include missing engineer-stamped structural drawings, incomplete product approval documentation, and site plans that don't clearly show setback dimensions. For context on how Seminole County's timelines compare to other Florida counties, see our Central Florida permit timeline guide.

How Much Does a Building Permit Cost in Seminole County?

Seminole County's building permit fees are governed by an adopted fee schedule that is being updated in 2026 and 2027 to comply with HB 803's requirement that fees reflect the actual cost of reviewing and processing applications rather than project valuation. Until the new fee schedule takes effect January 1, 2027, the county's current valuation-based fee structure applies.

General cost ranges for common residential permits in unincorporated Seminole County:

• Water heater replacement: $75–$150 (plumbing permit)
• Roof replacement: $175–$400
• HVAC system replacement: $100–$250
• Electrical panel upgrade: $150–$350
• Pool installation: $800–$1,500
• Room addition: $800–$2,500+, depending on square footage and sub-permits

Sub-permits for electrical, plumbing, and mechanical work are each separate fees added on top of the base building permit fee. For a statewide comparison of permit costs, see our complete Florida building permit cost breakdown. For a current fee estimate specific to your project, contact the Seminole County Building Division at (407) 665-7050 before submitting.

Can a Homeowner Pull Their Own Permit in Seminole County?

Florida law allows homeowners to act as their own general contractor — known as an owner-builder permit — for construction on their primary residence. Seminole County enforces the same owner-builder rules required by Florida Statute 489.103. To qualify, you must own and occupy the property as your primary residence and sign a disclosure affidavit at the time of application acknowledging responsibility for code compliance, inspections, and worker's compensation obligations.

Even with an owner-builder permit, all licensed trade work — electrical, plumbing, HVAC, and gas — must be performed by Florida-licensed contractors. You'll also need licensed engineers to provide any required stamped structural drawings. For most projects larger than a simple repair, the liability and complexity of acting as your own general contractor outweighs the potential savings. Read our complete Florida owner-builder permit guide for a full explanation of the rules and responsibilities before deciding.

What Happens If You Build Without a Permit in Seminole County?

Unpermitted construction in Seminole County carries the same serious risks as anywhere in Florida. Consequences can include:

• Stop-work orders: All work halted immediately until a permit is obtained
• Daily fines: Ongoing code enforcement fines that accumulate until the violation is resolved
• Invasive retroactive inspections: Requiring removal of drywall, roofing, or other finished surfaces so inspectors can verify concealed work — often more costly than permitting the job correctly at the start
• Mandatory demolition: In cases where unpermitted work cannot be brought into code compliance, counties can require complete removal of the structure or improvement

Seminole County maintains searchable permit records through its online portal, and real estate professionals, lenders, title companies, insurance adjusters, and appraisers routinely check permit history when evaluating properties. Unpermitted work that surfaces during a sale can delay or kill a transaction. Florida law requires sellers to disclose known permit issues, and buyers' lenders — especially for FHA and VA loans — often will not close until open or unpermitted work is resolved. Read our guides on open permits and your Florida home sale and what happens if you build without a permit in Florida for a full breakdown of the risks and your retroactive permitting options.

Ready to move forward with your Seminole County project? Tell us about your project and we'll connect you with a licensed permit professional who knows Seminole County's process.