As-Built Plans vs. New Design Plans: Which Fits ATF Florida?

Key Takeaways

• After-the-fact permits in Florida typically require either as-built drawings documenting existing conditions or new design plans showing code corrections, and knowing which path applies can save weeks and significant money.

• Approval of unpermitted work is not guaranteed—it must still satisfy the Florida Building Code, zoning rules, and local requirements, with no single statewide process since each of Florida's 67 counties and municipalities sets its own checklist and fees.

• Structural work, roof framing, foundations, and fire-rated assemblies almost always require a Florida-licensed engineer's or architect's sealed plans, while simple non-structural cosmetic work may be accepted with drafted plans alone.

• Inspectors may require exploratory openings to verify concealed framing and wiring, but good as-built documentation with clear construction photos, product labels, and professional field verification can significantly reduce the need for wall demolition.

• The step-by-step process involves identifying your permitting authority, checking permit history, documenting existing conditions with measurements and photos, preparing required plans, submitting applications with fees, and completing inspections before final approval.

• Common costly mistakes include drawing what was intended rather than what exists, skipping permit history checks, assuming one county's rules apply elsewhere, and waiting until a stop-work order or closing deadline to begin the process.

Picture this: you bought a lovely Florida home, and during the inspection someone mentions the screened lanai, the garage conversion, or the back-bedroom addition was never permitted. Your stomach drops. Take a breath, because this is far more common than you might think, and it is almost always fixable. The first big question is usually about paperwork: what kind of design plans for after the fact Florida permits do you actually need?

Here is the short version. Most after-the-fact (ATF) applications call for as-built drawings that document what already exists. In a few situations, though, the building department wants new design plans that show corrections or upgrades to bring the work up to code. Knowing which path you are on can save you weeks of back-and-forth and a surprising amount of money.

Whether you are a homeowner, a general contractor, a solar installer, or a real estate pro closing a deal, this guide compares the two approaches side by side, walks through the process step by step, and helps you choose with confidence.

What Does 'After the Fact' Actually Mean in Florida?

An after-the-fact permit is an application for approval of construction, alteration, or repair that was completed without the permit it should have had. Florida Statutes §553.79 generally requires a permit before covered work begins. Local departments may call the fix an after-the-fact, retroactive, or corrective permit, but the idea is the same: you are asking the jurisdiction to review and approve work that is already built.

Two important truths belong up front:

• Approval is not guaranteed. The work still has to satisfy the Florida Building Code, zoning rules, and any other local requirements.
• There is no single statewide process. Each city or county sets its own checklist, fees, review steps, and inspections.

That second point matters a lot. Florida has 67 counties, but permitting authority is often municipal, so the very first job is figuring out who actually controls your property. Our building department lookup tool is a handy place to start. For a broader look at the legal landscape, see our guide on whether the Florida Building Code allows after-the-fact permits.

The Two Types of Plans: A Quick Comparison

When people search for design plans for after the fact Florida, they are usually looking for one of two very different documents. Here is how they stack up.

In real life, many ATF projects blend both. You document what exists, then add corrective details only where the review shows a problem. Think of as-builts as the foundation and new design plans as the repair kit.

As-Built Plans: Documenting What Is Already There

As-built plans are the workhorse of ATF permitting. The golden rule is simple: they must accurately show what exists, not what was intended or what you wish had been built. Reviewers and inspectors compare the drawings to reality, so a rosy picture backfires fast.

What Usually Goes Into an As-Built Package

Exact requirements vary by jurisdiction, but a typical set may include:

• A site plan or survey showing setbacks, lot coverage, and the location of the work
• Floor plans with dimensions, room labels, and openings
• Elevations showing heights, rooflines, windows, and doors
• Construction details such as framing, connections, and foundations
• Structural, electrical, plumbing, or mechanical information, depending on scope
• Photographs of the work and product documentation for items like windows or roofing

If you want the full picture of how these drawings work, our as-built drawings service page breaks it down, and our guide to getting as-built drawings for Florida permits walks through the steps.

When As-Builts Are the Right Choice

• The work was built carefully and likely meets code, it just never got a permit
• The reviewer mainly needs a record of existing conditions
• Concealed work can be verified through inspection, photos, or limited exploratory openings
• The structure is simple, like a small shed, fence, or non-structural remodel

New Design Plans: When Documenting Is Not Enough

Sometimes the honest answer is that what was built will not pass as-is. Maybe the framing is undersized, the tie-downs are missing, or a wall is not properly supported. In that case, the building department will want new design plans showing how the work will be corrected.

This is where a Florida-licensed engineer or architect really earns their keep. They evaluate the existing construction, calculate whether it works, and prepare sealed details for any fixes. Our structural engineering and MEP engineering teams handle exactly this kind of work, with in-house sealed drawings so you are not waiting on an outside consultant to call someone back.

Signs You Probably Need New Design Plans

1. The inspector or plan reviewer flags structural deficiencies
2. Wind-load, tie-down, or foundation requirements are not met
3. Electrical or plumbing work needs to be redone or reconfigured
4. The work violates setbacks or zoning and requires a redesign or variance
5. Fire-rated assemblies or egress requirements were skipped

For wall, roof, or truss concerns, an engineer letter can sometimes verify existing construction without a full redesign, which can be a nice middle ground.

Do ATF Plans Need an Engineer's or Architect's Seal?

Often, yes, but it depends on the project and the jurisdiction. For example, Seminole County notes that plans may need the seal of a Florida-licensed architect or engineer when structural work or fire-rated assemblies are involved. Simple, non-structural work may be accepted with drafted plans alone.

As a general rule of thumb:

• Non-structural cosmetic work: drafted plans are often enough
• Additions, enclosures, and structural changes: expect sealed plans
• Anything involving roof framing, trusses, or foundations: expect an engineer's involvement

The safest move is to confirm the local checklist before you pay for drawings. For deeper reading, take a look at whether a sealed drawing is required for after-the-fact permits.

The Step-by-Step ATF Process

While every jurisdiction has its own flavor, a typical resolution follows a familiar rhythm.

1. Identify the permitting authority. Confirm whether your property falls under a city or county, since the boundary is not always obvious.
2. Check permit and violation history. Our open permit search tool can help you see what is already on record.
3. Document existing conditions. Measure, photograph, and gather product information.
4. Prepare the required plans. Create as-builts, new design plans, or a combination, following the jurisdiction's checklist.
5. Submit the application and fees. Fees and timelines vary, so ask the building department for current figures.
6. Complete plan review and inspections. Respond to comments promptly and accurately.
7. Correct deficiencies. Fix whatever the reviewer or inspector flags.
8. Obtain final approval or permit closure. This is the finish line you have been working toward.

If you would like a more detailed roadmap, our guide to getting an after-the-fact permit in Florida covers the process in depth.

Will Inspectors Make You Open Up Walls?

This is the question that keeps homeowners up at night. The honest answer: possibly. Inspectors need to verify concealed framing, wiring, plumbing, and other work. If it cannot be inspected as-is, the department may require exploratory openings, additional documentation, or a professional evaluation.

Good as-built documentation can reduce the need for demolition. Clear photos taken during construction, product labels, and an engineer's field verification often satisfy reviewers without tearing into finished surfaces. Our article on what happens during a Florida ATF site inspection sets expectations nicely.

Cost and Timeline: What to Expect

Here is where we have to be straightforward. There is no reliable statewide average for ATF costs or processing times, because fees, penalties, and review schedules differ by jurisdiction and project. Some departments charge penalty or double fees, others charge standard fees plus administrative costs, and some add code enforcement charges if a violation is open.

For a closer look at the money side, see our breakdown of after-the-fact permit costs in Florida.

Which Path Is Right for You?

Let's make this practical with a few common scenarios and who they tend to affect.

Homeowners and Residential Property Owners

If you inherited an unpermitted patio enclosure or a previous owner finished the garage, start with an honest evaluation. Often a well-documented set of as-builts plus a short engineer letter does the trick. Our homeowner resources can point you in the right direction.

General Contractors and Design Trade Professionals

If a client's earlier work needs legalizing, accurate documentation protects your reputation. Many architects, designers, and trades outsource this part. If you already have your own engineer, our drafting-only service produces the permit set and stops there, so it is your seal and your client. Explore our general contractor support for more.

Solar Companies

Rooftop systems installed without permits, or with expired ones, need as-built electrical and structural documentation. Reviewers will look closely at roof framing and attachment. Learn more on our solar contractor page.

Realtors, Investors, and Buyers

When unpermitted work surfaces at closing, speed matters. Early research, clear plans, and a realistic plan of attack keep deals alive. See our realtor closing support and this article on whether a home sale can close with unpermitted work in Florida.

Common Mistakes That Slow Everything Down

• Drawing what was intended instead of what actually exists
• Skipping the permit history check and missing an open or expired permit
• Assuming one county's rules apply in the next county over
• Waiting until a stop-work order or closing deadline to start
• Hiring drafters who do not coordinate with an engineer when structural issues appear

If a notice has already arrived, our page on code compliance violations explains how to respond, and our urgent permit rescue service helps when time is tight.

How 1 Contractor Solutions Can Help

At 1 Contractor Solutions, we act as Florida's outsourced permitting department. We prepare or review the plans, file the application, track it, work every reviewer comment, handle revisions, and carry the project through approval and closeout. Because our drafting and engineering are in house and our own engineer signs and seals the work, corrections do not stall waiting on an outside consultant. We work across all 67 Florida counties, respond within 30 minutes, and offer after-the-fact and expired permit services for the files others decline. Curious how we do? Read what customers say on Google: Visit us on Google — 1 Contractor Solutions. You can also follow us on LinkedIn or follow us on Facebook for permitting tips.

The Bottom Line

So, as-built plans or new design plans? If your work was built well and simply needs a record, as-builts are usually your best bet. If the review reveals code problems, expect new design plans for the corrections, often with an engineer's seal. Most real-world projects blend the two, and starting with an honest evaluation keeps surprises small.

The best next step is to find your permitting authority, check your permit history, and talk to someone who handles these files every day. When you are ready, get a free quote and let us help you turn that unpermitted worry into a closed permit.