The most common mistake we see Ardmore homeowners make is buying too small. Almost everyone who ends up with a second shed wishes they had gone bigger the first time around. The mower they bought last year does not fit alongside the new ATV. The workbench they wanted has no room. The kids' bikes start living in the corner of the garage again.
Start with what you actually need, not what feels modest. A bigger shed costs a little more upfront, but a do-over costs the price of two sheds. Here is how to think about sizing for South Central Oklahoma, including a permit threshold worth knowing before you pick a footprint.
The Oklahoma Permit Line
This is the one most online guides miss. In most Oklahoma counties, sheds under 200 square feet do not require a building permit. That is a useful threshold to plan around. A 10×16 shed is 160 square feet, so it slides in under the line. A 12×20 is 240 square feet and typically does require a permit, plus a small fee and a setback check.
Neither is a big deal, but a permit adds a couple of weeks to the schedule and a little paperwork. Worth knowing before you fall in love with a size. Always confirm the exact rule with Carter County or your local municipality, since smaller cities sometimes have their own ordinances.
Size by Use Case
- Small (8×10 to 10×12 ft)
Lawn mower, garden tools, holiday bins, kids' bikes, ladders. Fits most backyards without crowding the lot. A good starting point if you have a clear and limited list of what is going in. Stays well under the 200 sq ft permit threshold.
- Medium (10×16 to 12×20 ft)
Riding mower plus a workbench, a small shop setup, a she-shed with light electrical, ATV storage, or general family use. This is the most popular size we build at Arbuckle Sheds, and for good reason. Enough room to actually work inside without bumping into your own stuff. Note that 10×16 stays under the permit threshold, while 12×20 typically requires one.
- Large (12×24 to 14×40 ft)
Full workshop, home-based business storage, two-vehicle storage, or serious woodworking. Almost always requires a permit in Oklahoma counties, but worth it for the space. If you can afford the upfront cost, very few people regret going this big.
The One Rule to Remember
Measure what you actually plan to store before you pick a size. A zero-turn mower is roughly 6 feet wide with the deck. A full-size ATV is 4 to 5 feet wide. A workbench wants at least 2 feet of depth, ideally 3. Add 3 feet of walk-around clearance on every side of anything you need to access regularly.
Sketch the floor plan on paper if you have to. People who skip this step always come back later wishing they had gone one size up. Five minutes with a tape measure saves you years of frustration and the cost of a second shed.
A Note on Lot Coverage
One more thing worth a quick check: most Oklahoma municipalities limit how much of your lot an outbuilding can cover. Roughly 30 to 40 percent of the lot is a common ceiling, and there is usually a setback rule pushing the shed at least 5 feet off the property line. Standard shed sizes almost never bump into this, but if you have a small lot and you are considering a 14×40, it is worth checking your local ordinance first.
Need a Second Opinion?
Not sure what size fits your property and your needs? We come out, walk the spot, talk through what you want to store, and give a free recommendation with no obligation to buy. We will tell you if a smaller shed is enough, or if it is worth going a size up. Either way, the conversation costs nothing.