Who to Hire for After-the-Fact Additions in Florida (2026)

Key Takeaways

• Start by confirming which jurisdiction (city or county building department) governs your property, since the building official makes the final call on what documentation and inspections your after-the-fact addition requires.

• Hire a permit consultant or expediter first to research permit history, check for open permits, and manage the application, rather than hiring a contractor who may not be needed at all.

• A Florida-licensed architectural drafter and, if structure or wind loads are in question, a Florida-licensed engineer must document what was built through as-built drawings and sealed engineering.

• Bring in a licensed contractor only if the review finds deficiencies, and verify any contractor's license through the Florida DBPR lookup to confirm it covers the specific work needed.

• Treat owner-builder permits as a limited exemption requiring direct onsite owner supervision, and verify eligibility with your local building department before relying on it.

• Get a written scope covering records research, drawings, engineering, filing, inspections, corrections, and permit closure, and avoid anyone who guarantees approval or suggests skipping the permit process.

So you bought a home, or maybe you've lived in one for years, and you've just discovered the sunroom, the garage conversion, or that extra bedroom was never permitted. Take a breath. You're far from the first Florida owner to land here, and it is very fixable. The real question is who should I hire for after the fact additions in Florida, because the answer is rarely just one person.

Legalizing an existing addition usually takes a small team: someone to run the paperwork, a licensed design professional to document what was built, and sometimes a licensed contractor to correct problems. The trick is knowing who does what, in what order, so you don't pay twice or hire the wrong person first.

In this guide, we'll walk through each professional, what they actually handle, how to vet them, and the red flags to avoid. Whether you're a homeowner, a general contractor, an agent with a closing on the calendar, or a designer who needs reliable backup, you'll leave with a clear plan for 2026. Let's get your addition on the right side of the paperwork.

Start With the Building Department, Not a Contractor

Before you hire anyone, find out who has jurisdiction over your property. In Florida, that is usually the city or county building department, and the answer isn't always obvious near city lines. Florida law generally requires a permit before building or altering a structure (see Florida Statutes Section 553.79), and each jurisdiction decides how an after-the-fact application is handled.

That means the building official, not your contractor or consultant, makes the final call on what documentation and inspections are required. Anyone who promises guaranteed approval before looking at your situation is guessing.

A quick first step is to use a building department lookup to confirm the right office, then check for open or expired records with an open permit search. Knowing whether a partial permit exists changes your whole strategy.

The Professionals You May Need (and What Each Does)

Think of this as casting a small production crew. Each role has a lane, and the lanes shouldn't be blurred.

A permitting consultant can coordinate everything, but technical documentation may need a Florida-licensed architect or engineer, and corrective work must be done by properly licensed contractors. Nobody replaces the building official's approval.

Permit Consultant or Expediter: Your Project Manager

If you only hire one person first, make it the permitting professional. A good one figures out the correct jurisdiction, researches the property's permit history, builds the application package, files it, and keeps it moving through review.

This matters because after-the-fact applications are rarely as simple as a standard permit. Reviewers may want to see inside walls, ask for engineering, or require corrections before they'll sign off. Someone who knows how that conversation goes can save you weeks.

Services like permit facilitation and filing and plan review coordination exist for exactly this reason. For work that sits in the expired or unpermitted category, see how after-the-fact and expired permit services are structured.

What a consultant cannot do

• Guarantee the building department will accept existing work
• Substitute for a sealed engineering document when one is required
• Bypass the permit process or suggest it can be skipped
• Waive local fees, penalties, or inspection requirements

If someone claims they can do any of the above, keep your wallet closed.

Drafting and Engineering: Documenting What Was Built

Here's where many owners get stuck. The building department wants to see what actually exists, and that usually means measured drawings of the addition, plus engineering if structure or wind resistance is in question.

An architectural drafter measures and draws the existing conditions. These as-built drawings become the backbone of your application. If the addition involves framing, roof tie-ins, or foundation questions, a Florida-licensed engineer steps in to inspect and document the work, prepare calculations, or issue an engineer letter where the jurisdiction accepts one.

Depending on the scope, you may need one or more of these:

• Structural engineering for framing, roof loads, and foundations
• MEP engineering for electrical, plumbing, and mechanical systems
• Site plans showing setbacks and lot coverage
• Residential plans for the permit set itself

If you already work with your own engineer, you can hire drafting only and keep your seal and your client relationship intact. That's a popular option for architects, designers, and trade professionals who want dependable outsourced support.

Do You Need a Contractor?

Maybe, but not always, and not first. A contractor comes into play if the review finds problems that must be corrected, such as undersized headers, missing tie-downs, or electrical that doesn't meet code.

Verify any contractor through the Florida DBPR license lookup and confirm local registration requirements. The license must cover the work being done. A general, building, or residential contractor handles applicable building work, while electrical, plumbing, and mechanical corrections call for properly licensed trade contractors.

General contractors reading this: you already know that contractor-side registration and paperwork can eat days. Tools like the contractor registration checklist and municipality registration support help you stay eligible to pull the corrective permit.

A word on the owner-builder route

Some owners wonder if they can simply pull an owner-builder permit and be done. The exemption is limited, not a general workaround. Florida Statute 489.103(7) sets conditions, including direct onsite supervision by the owner, and local agencies may require disclosures and personal application steps. Before relying on it, check eligibility with your building department, and read up on owner-builder permits.

How the Process Usually Unfolds

Every jurisdiction has its own rhythm, but most after-the-fact additions follow a similar arc. Here's the typical sequence:

1. Research the property. Confirm jurisdiction, pull permit history, and check for open permits or violations.
2. Document existing conditions. Measure the addition and prepare as-built drawings.
3. Engineer as needed. A licensed engineer inspects and seals structural or MEP documents if required.
4. File the application. Submit the package, pay applicable after-the-fact fees, and begin plan review.
5. Answer reviewer comments. Respond to corrections and resubmit; see revisions and resubmittals for how this works.
6. Complete inspections. You may need to expose concealed work, make repairs, or provide evidence of compliance.
7. Close the permit. Obtain final approval and, where applicable, a certificate of completion or occupancy.

Expect the authority to review plans and require inspections or other evidence to confirm that completed and concealed work complies with applicable code. Depending on findings, you may need to expose work, add engineering documentation, make repairs, or in rare cases remove noncompliant construction.

What It Costs and What Affects It

Nobody can quote your exact price without seeing the addition, and be wary of anyone who does. Costs vary widely by jurisdiction and scope. Local ordinances differ, too. For example, Pasco County's ordinance describes after-the-fact permit fees and states that paying the fee does not itself defend against prosecution for work begun without a required permit. That's a local example, not a statewide fee schedule.

For a deeper look, see this breakdown of after-the-fact permit costs in Florida and what it takes to legalize an addition.

How to Vet Anyone You Hire

Hiring well is half the battle. Before you sign, ask for a written scope that covers records research, measured drawings, engineering, permit application, inspection coordination, correction work, and permit closure. Then confirm who is responsible for each task.

Use this quick checklist:

• Verify licenses through Florida DBPR for contractors and engineers
• Ask for proof of insurance
• Request examples of similar after-the-fact work in your county
• Confirm they'll coordinate directly with your building department
• Ask who seals the drawings and whether that work is in house
• Get timelines and fee estimates in writing

In-house drafting and sealed engineering is a real advantage. When a reviewer flags a comment, the same team can fix it instead of waiting on an outside consultant to return a call.

Red Flags to Avoid

Most horror stories start with a promise that sounds too good. Watch for these warning signs:

• Guaranteed approval before reviewing your property
• Suggestions to skip the permit or "quietly" finish the work
• Contractors without a verifiable Florida license for the work involved
• Vague scopes with no mention of inspections or closeout
• Pressure to pay the full amount upfront
• Anyone unwilling to explain what the building department will actually require

If you've already received a notice, don't panic and don't ignore it. Learn how code compliance violations are resolved and how to respond to a Florida unpermitted work notice.

Who to Hire Based on Your Situation

The right team depends on why you're here. A few common scenarios:

You're a homeowner who just found out

Start with a permitting professional to research the property and map out the process. They'll tell you whether you need drawings, engineering, or both. See the guide for homeowners to get oriented.

You're a real estate agent or investor facing a closing

Timing is everything. A permit hold or lender requirement can stall a deal, so bring in help early. Realtor closing support and the urgent permit rescue option are built for tight deadlines.

You're a general contractor with a client's addition

You need accurate drawings, sealed engineering, and reliable tracking so you can get back to building. Outsourcing the paperwork frees your crew. See support for general contractors.

You're a designer or trade professional

If you don't keep drafting or engineering in house, outsource the technical documentation and permit administration while you stay focused on design and client relationships.

At 1 Contractor Solutions, we act as Florida's outsourced permitting department across all 67 counties, with in-house drafting and engineering and our own sealed drawings. You can see what our customers say on Google, and you can follow us on Facebook or follow us on LinkedIn for Florida permitting updates.

Rules Vary by Location: Check Locally

Florida isn't one permitting system; it's hundreds. Pinellas County, for instance, describes a six-month permit validity period absent an approved inspection or extension, and other jurisdictions set their own timelines. A statewide provision also requires local governments to exempt certain low-value work (under $7,500) on single-family dwellings, subject to the statute's terms, but an addition is rarely small enough to qualify, so confirm applicability locally.

If you're in one of our busiest areas, local guides can help: Hillsborough County, Pinellas County, Pasco County, and Miami-Dade County. For the full statewide picture, start at our Florida county directory.

Ready to Legalize Your Addition?

So, who should you hire for an after-the-fact addition in Florida? A permitting professional to run the process, a drafter and licensed engineer to document what exists, and a properly licensed contractor only if corrections are needed. Keep the building department in the driver's seat, put the scope in writing, and steer clear of anyone promising guaranteed approval.

You don't have to untangle this alone. If you'd like a clear plan, an honest read on what your jurisdiction will require, and a team that can draft, engineer, file, and carry the permit through closeout, get a free quote and let's get your addition permitted and your project moving.