Three Florida specialty categories compared: screen enclosures capped at 720 square feet, irrigation without wells or pumps, and drywall without plaster or block.
Florida's specialty contractor categories are small on purpose. Each one is a short list of work the board will certify, followed by a hard stop where a different trade begins. The three covered here, screen enclosures, irrigation and gypsum drywall, show that design clearly, and each has a limit that catches companies who stretch the scope.
This guide lays the three side by side, adds the exam figures and the insurance floor, and explains the qualifying agent rule that applies when a company holds one of these credentials. For the full category list, see the Florida specialty contractor categories guide, and for the overall state picture, the Florida contractor license page.
At a glance
- All three sit in one rule. Screen enclosure is item (a), irrigation is item (q) and gypsum drywall is item (t) of rule 61G4-15.100.
- Screen enclosures stop at 720 square feet. Aluminum screened porches, pool enclosures and single story utility storage structures cannot exceed that size.
- Irrigation excludes wells and pumps. Agricultural irrigation systems are outside the rule.
- Exams differ. Screen enclosure is 50 questions over 2.5 hours. Irrigation and gypsum drywall are 80 questions over 5 hours. All need 70% (DBPR booklet, effective July 2024).
- A business needs a qualifying agent. F.S. 489.119(3)(a) requires one who is certified or registered in the category.
Structural aluminum or screen enclosure: item (a)
This category covers aluminum screened porches and enclosures, pool enclosures and single story utility storage structures. The rule caps those structures at 720 square feet. A 400 square foot lanai cage is inside the category. A 900 square foot enclosure over a large pool deck is not.
The second limit is structural. The contractor may not perform work that alters the structural integrity of the building, which the rule illustrates with roof trusses, lintels, load bearing walls and foundations. Attaching an enclosure to a house is fine. Cutting into the framing that carries the roof is not.
The rule also says work in another trade goes to a contractor licensed in that trade. If the enclosure job needs a new electrical outlet or a slab, the screen enclosure company subcontracts that part.
Irrigation: item (q)
The irrigation specialty covers installing, maintaining, repairing, altering, extending, managing, monitoring and auditing irrigation systems, plus designing them where the law does not prohibit it. Related excavation is included, so trenching for lines does not need a separate excavation credential.
Two exclusions define the edges. Agricultural irrigation systems are outside the rule. The contractor is also precluded from work on water wells or pumps, with the rule pointing to the Florida Plumbing Code and section 373.323(10) of the Florida Statutes. A company that wants to install the pump that feeds a system should plan for that work to be done by someone licensed for it.
Gypsum drywall: item (t)
The gypsum drywall specialty is limited to the work needed to erect and finish drywall. That means necessary metal accessories, including non load bearing metal studs, runners, hangers, channels and suspension accessories, and preparing surfaces and applying base and finish coats for the drywall the contractor erects.
The category states what it does not include: plastering, block, or wood partitions. A drywall company that frames a wood partition or builds block work is outside its category on that portion of the job.
Side by side
| Category | Rule item | Exam | Hard limit |
|---|---|---|---|
| Structural aluminum or screen enclosure | (a) | 50 questions, 2.5 hours | 720 square feet; no structural alterations |
| Irrigation | (q) | 80 questions, 5 hours | No wells or pumps; no agricultural systems |
| Gypsum drywall | (t) | 80 questions, 5 hours | No plastering, block or wood partitions |
Each exam needs a 70% score. The booklet lists a Business and Finance exam of 120 questions over 6.5 hours as well. The garage door installation specialty, item (k), shares the 50 question, 2.5 hour format and is covered in the window, door and glass guide.
Insurance floor
Under rule 61G4-15.003(2)(h), a specialty contractor carries $100,000 in public liability and $25,000 in property damage coverage unless the rule specifies otherwise. The rule sets higher amounts for general and building contractors, and a company that holds more than one category should read the table for each. Check contractor insurance requirements by state for how this compares with other states.
Fees are set by the board or testing vendor and can change. Verify the current amount with the provider before you pay.
The qualifying agent behind the business
A company cannot hold a Florida contracting category on its own. Under F.S. 489.119, a business organization applies for registration or certification through its qualifying agent, and the application includes an affidavit that the applicant has final approval authority over construction work and business matters, unless a financially responsible officer is approved. Section 489.119(3)(a) says a qualifying agent must be certified or registered for the business to operate in that category.
The practical risk is turnover. If the sole qualifying agent leaves, the business has 60 days to employ another and cannot contract until one is employed, unless a temporary certificate is granted. A screen enclosure or irrigation company with one licensed owner has no margin if that person leaves.
Section 489.119(6) covers a person who qualifies more than one business. Each qualifying agent pays the department a fee equal to the original registration or certification fee for each new business, shows the ability to supervise each one, and the board's approval is discretionary.
A qualifying agent qualifies the company. In the W-2 model, that is a full-time employee who holds the category and takes real responsibility for the work, not a name on a form. Read what a qualifying agent is and the Florida qualifying agent guide for how the role works, and hire a qualifying agent if your company needs one.
Three jobs, three answers
A few examples show how the limits work. These are scope illustrations, not legal advice, so confirm the specifics with the Florida Department of Business and Professional Regulation.
| Job | Inside the category? | Why |
|---|---|---|
| A 600 square foot pool cage attached to a home | Yes, screen enclosure | Under the 720 square foot cap and no structural change |
| Adding a new well pump to feed a lawn system | No | Irrigation precludes work on water wells or pumps |
| Framing a wood partition and hanging drywall on it | Drywall only | The wood partition is outside the gypsum drywall category |
The pattern is the same in each row. The credential covers a defined set of tasks, and the part of the job beyond that set goes to a contractor whose license covers it. Companies that price a whole job without separating those pieces are the ones that run into trouble on inspection or in a complaint.
How to check your scope before you bid
- Find the item letter for your work in rule 61G4-15.100.
- Write down the stated limit: square feet for screen enclosures, wells and pumps for irrigation, plaster and block for drywall.
- List every task in the job that falls outside that scope.
- Assign those tasks to a subcontractor who holds the right license.
- Confirm with the Florida Department of Business and Professional Regulation whether the job also needs a local permit or registration.
Frequently asked questions
Can a screen enclosure contractor build an enclosure larger than 720 square feet?
Not under this category. The rule limits the structures to 720 square feet. Larger structures need a contractor whose license covers that work.
Does an irrigation license let me install a well pump?
No. The rule precludes work on water wells or pumps, so that part of a job goes to someone licensed for it.
What is the cost of getting one of these credentials?
Board fees and exam fees are published by the Florida Department of Business and Professional Regulation and the testing vendor, so verify the current amounts with them. What it costs to place a qualifier depends on the category, the number of businesses and the oversight your company needs, so see consultation options.
What happens if my only qualifier leaves?
Under F.S. 489.119(3)(a), the business has 60 days to employ another qualifying agent and cannot contract until it does, unless a temporary certificate is granted.
Next steps
Compare your category with the others in the specialty categories guide, or look at neighboring trades such as Florida roofing and Florida pool contractors. For other states, see the state guides.
Sources
- Florida Administrative Code rule 61G4-15.100, Specialty Contractors, retrieved October 9, 2026
- Florida Administrative Code rule 61G4-15.003, Insurance, retrieved October 9, 2026
- DBPR Construction Industry Examination Candidate Information Booklet, effective July 2024, retrieved October 9, 2026
- Florida Statutes 489.119, retrieved October 9, 2026
Disclaimer: This article is provided for educational and informational purposes only. It does not constitute legal advice, licensing guidance, or an offer of services. Licensing requirements vary by jurisdiction. For specific compliance questions, contact The Licensing Company for a confidential consultation.