Permits are the part of the post frame building process that nobody wants to deal with — and the part that causes the most preventable delays and headaches. Most buyers assume the permit process is simple, straightforward, or something they can figure out after they’ve already ordered their kit. That assumption leads to real problems.

This post covers what you actually need to know about post frame building permits: what’s typically required, what varies by location, and how to prepare so the permitting process doesn’t slow you down or cost you money.

Why Permits Matter

Before getting into the specifics, it’s worth understanding why permits exist and why they matter for your project specifically.

Building permits exist to ensure that structures are safe — built to a standard that protects people, property, and neighboring landowners. For post frame buildings specifically, permits verify that the structural design accounts for your region’s wind load, snow load, and soil conditions.

Beyond safety, unpermitted buildings can create serious problems:

Difficulty selling the property. Unpermitted structures often need to be disclosed in real estate transactions and can complicate or kill a sale.
Insurance complications. Some insurers will not cover damage to unpermitted structures, or will pay out at a reduced rate.
Forced removal or modification. In the worst cases, local building authorities can require you to tear down or substantially modify an unpermitted structure.

The permit process is worth the time and cost.

What Triggers a Permit Requirement

Almost every jurisdiction requires a building permit for a permanent structure of meaningful size. While rules vary, you should assume a permit is required if your building:

Is larger than roughly 200 square feet (the threshold varies — some counties set it at 120 sq ft, some at 400)
Is intended to house people, animals, or equipment regularly
Is attached to an existing permitted structure
Has electrical, plumbing, or mechanical systems

If you’re in a rural area with minimal zoning, requirements may be more relaxed — but verify this directly with your county rather than assuming.

What You’ll Typically Need to Submit

A standard post frame building permit application usually requires:

1. A site plan.
A drawing showing your property lines, the location of the proposed building on the lot, setback distances from property lines, roads, and other structures, and any existing buildings on the property.

2. Engineered building plans.
This is where your kit supplier becomes critical. A quality post frame kit includes engineer-stamped drawings that show the structural design of the building — post sizes, truss design, connection details, and load calculations. Many county building departments require that these plans be stamped by a licensed engineer registered in your state.

3. Foundation plan.
Documentation of how the posts will be set — direct burial depth, concrete collar details, or pier specifications.

4. Completed permit application.
Your county’s building department will have its own application form. Some counties now offer online submission; others require in-person filing.

5. Application fee.
Permit fees vary widely by jurisdiction and building size. Plan for $300–$2,500 depending on your county.

What Varies by Location

Permit requirements for post frame buildings vary more by location than almost any other aspect of the project. Key variables include:

Zoning classification. Agricultural zones often have more permissive building rules than residential or commercial zones. A building that requires minimal permitting on an agricultural parcel may face much stricter requirements on a residentially zoned lot.

Snow and wind load requirements. Your building plans must account for the structural loads specific to your region. A building designed for central Ohio snow loads may not meet the requirements in a high-elevation or high-wind zone.

State engineer registration. Some states require that any building permit submission include plans stamped by an engineer licensed in that specific state — not just any licensed engineer.

Homeowner exemptions. A small number of states allow homeowners to build certain structures on their own property without a permit or with a simplified permit process. These exemptions are narrowing, however — check with your county.

How to Prepare for the Permit Process

The best approach is to contact your local building department before you order your kit. Ask these specific questions:

What is the minimum size that requires a permit?
Are engineer-stamped plans required, and must the engineer be licensed in this state?
What are the required setbacks from property lines, roads, and existing structures?
Are there any zoning restrictions on my parcel that affect building type or use?
What is the current processing timeline for permit approval?

Processing times vary from a few days to several months depending on your county. In some rural areas, permit approval is fast and straightforward. In others, the review queue is long and submission errors create significant delays. Starting this process early — before your kit is ordered — protects your timeline.

How Your Kit Supplier Helps

A quality post frame kit supplier should provide engineer-stamped plans as part of the kit package. They should also be able to tell you what load specifications the building is designed to (wind speed, ground snow load, exposure category) so you can confirm those match your local requirements.

At Country Building Co, our kits come with full engineered plan sets designed to meet the permitting requirements in your region. We’ll help you understand what’s in the plans and what your local building department will expect to see. You shouldn’t have to figure this out alone.