When buying the lumber, you should select the planks with great care, making sure they are straight and without any visible flaws (cracks, knots, twists, decay). Investing in cedar or other weather resistant lumber is a good idea, as it will pay off on the long run. Use a spirit level to plumb and align the components, before inserting the galvanized screws, otherwise the project won’t have a symmetrical look. If you have all the materials and tools required for the project, you could get the job done in about a day.
Would we do it again? I won’t sugar coat it, this is real life so probably not. Some things aren’t worth the aggravation or the stress. In the end, we didn’t save that much money by building the shed ourselves. I think the total cost was around $1200. But I can tell you one thing, if we are ever attacked by zombies or if there is an Armageddon I am hiding in the shed because the big bad wolf can huff and puff and nothing is taking this structure down. 

A thing you might want to check is if regulations require a minimum setback from the property line. This is often overlooked and come back to bite you. A silly thing I found out when I built my shed, my jurisdiction in California treats buildings differently depending on what they are called on the permit. I called my shed a barn because I built a gambrel roof and it looked like a barn. My surprise....A barn must be 50 feet away from any structures occupied by humans. A shed can be almost against the house.....same size, same shape,,,just different names.
The best spot for a shed is level, well-drained ground close to where you work in your garden or yard. The location doesn’t need to be perfectly flat; the foundation design shown in the plans allows for adjustments to make the floor level. Small sheds require only a top-of-soil foundation, even in locations with freezing winter temperatures. Precast concrete deck blocks work perfectly for this.
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