One of the first questions we hear from customers is: "Do I need to pour a concrete pad before you deliver my shed?" The short answer is no -but understanding your foundation options will help you make the right choice for your property and budget.
This article covers the main foundation methods, what works best for portable storage buildings, and how Banner Buildings approaches site preparation.
You Do Not Need a Concrete Slab for a Portable Shed
If you are buying a portable storage building from Banner Buildings, you do not need to pour a concrete slab first. That is a common misconception that stops people from buying sooner than they should. Many homeowners assume a concrete foundation is required and delay their purchase to save up for the slab. In reality, there is a better, faster, and cheaper way.
Concrete slabs are excellent for permanent structures -garages, workshops, or buildings that will never move. But for portable sheds that might be relocated later, a concrete slab is overkill and actually limits your options. Here is why.
Concrete Blocks: The Industry Standard for Portable Buildings
Banner Buildings delivers and installs every shed on engineered concrete blocks. This is the standard method used across the portable building industry because it works. Our delivery crew brings the blocks with them, assesses your site, and places the building on blocks that are adjusted for proper leveling. You do not need to do anything in advance except clear the area and make sure it is reasonably level.
Concrete blocks provide all the benefits you need from a foundation. They properly support the building's weight, distribute the load evenly, and keep the floor structure elevated off direct soil contact. This elevation is critical: it allows air to flow underneath the shed, which reduces moisture accumulation, prevents rot in wood components, and extends the life of the building dramatically.
Blocks also make the building easy to level. If your property has slight slope or slight settling over time, our crew can adjust the blocks during installation or later. This flexibility is one of the biggest advantages of block foundations over poured concrete.
And if you ever decide to move the shed to a different spot on your property -maybe you want it in a sunnier location, or your landscape changes -a building on blocks can be relocated. A building on a concrete slab is essentially permanent.
A Gravel Pad Makes Blocks Even Better
For best results, prepare a compacted gravel pad where the shed will sit. A four-to-six-inch layer of crushed stone (not pea gravel) compacted and leveled provides an ideal base for the concrete blocks. The gravel drains water away, remains stable, and is far cheaper than a concrete slab.
A local landscape or gravel supply company can deliver material and tell you how many tons you need for your square footage. The cost is usually $150-$400 depending on your area and pad size. It is money well spent.
Without a gravel pad, concrete blocks can still be used on firm, level ground -but a pad provides extra stability and better drainage.
Existing Asphalt or Concrete Works Fine
If your shed will sit on an existing driveway, parking area, or other asphalt or concrete surface, that works perfectly. You do not need to remove it. We place the shed on the existing surface with concrete blocks for leveling. The asphalt or concrete provides a stable, level base that drains reasonably well.
When a Concrete Slab Actually Makes Sense
A concrete slab is worth the investment only for specific uses. If you are building a permanent workshop where you will be standing and working for long hours, concrete is more comfortable than a wood subfloor on blocks. If you are parking a vehicle inside the shed, concrete handles vehicle weight and oil spills better. If you are building a structure intended to stay in one spot permanently and never relocate, a slab is appropriate.
But for a typical storage shed? No. A slab costs $2,000-$5,000+, requires lead time for forming and curing, and locks the shed in place permanently. Concrete blocks cost a few hundred dollars and provide all the benefits of proper support, good drainage, and future flexibility.
How to Prepare Your Site for Banner Buildings Delivery
Here is what you actually need to do before your shed arrives:
Clear the area. Remove brush, rocks, debris, and anything that would prevent the shed from sitting level.
Make sure the ground is reasonably level. Your property does not need to be perfectly flat, but significant slope (more than 6-8 inches across the shed's footprint) may require additional grading.
Optional: Prepare a gravel pad. If you want extra stability and drainage, a compacted four-to-six-inch gravel pad is ideal. Not required, but recommended.
That is it. Our crew handles the rest -they bring the blocks, assess the final site condition, and level the building during delivery.
If You Are Unsure About Your Site
Call us at 706-568-0500 or email a photo or description of where you plan to put the shed. We can tell you whether your site needs any preparation before delivery. If you are in the Columbus, GA area, we can also visit your property to assess it directly.
The goal is simple: get your building installed correctly the first time so it lasts for decades without issues. That does not require a concrete slab. It requires a level site, good drainage, and proper block installation -all things we handle as part of the delivery process.