Renovation guides

How to build a shed from a kit yourself: step by step

A kit shed goes together from the manual; what makes it last is the base. Check the size and setback rules before you buy, build a level gravel pad, assemble with a helper, and anchor it down.

Difficulty 3 of 5 · 2 weekends · careful

Photo of your room, the look you pick, then this guide with the materials counted for your room.

Step by step

1. Step 1 of 13

   Check the rules before you buy

   

   Ask your city what size and height of shed you can build without a permit (often 120 sq ft of floor — check with your city), how far it must sit from the property line, the fence and the house, and whether your HOA has rules. Write the numbers down and pick a kit that fits them.

2. Step 2 of 13

   Pick the spot

   

   Choose the flattest spot that drains, out of low spots where water stands, clear of overhead wires and tree limbs, with room to open the doors and walk around the shed. Call 811 before you dig the pad.

3. Step 3 of 13

   Choose the base

   

   Use what the manual allows: 4 in of compacted gravel inside a treated timber frame, or a paver pad. Make the pad a little bigger than the shed floor, as the manual says. Never set the shed on bare soil.

4. Step 4 of 13

   Mark the pad and square it

   

   Drive stakes at the corners and pull a string around the pad. Check the corners with the 3-4-5 rule and measure both diagonals — they must match.

5. Step 5 of 13

   Dig out the pad and set the frame

   

   Remove the grass and loose topsoil inside the strings. Set the treated timbers around the pad, level them with each other, and pin the corners with rebar or long spikes.

   Before you dig

   • 811 marks are in and every utility on the ticket answered
   • The shed's size and height are within what your city allows without a permit, or you have the permit
   • The pad keeps the setbacks from the property line and the house
   • The spot drains and is not in a low spot

6. Step 6 of 13

   Fill and compact the gravel

   

   Lay landscape fabric inside the frame, then fill with gravel in 2 layers of about 2 in, dampening and compacting each one until your boot leaves no print.

7. Step 7 of 13

   Check that the pad is level

   

   Lay a straight board across the pad in several directions with the 4 ft level on it. Rake gravel from the high spots into the low ones and compact again until it is level within what the manual allows.

8. Step 8 of 13

   Unbox and check the parts

   

   Lay every part out on a tarp and check it against the manual's list. Sort the screws and bolts by size. Read the manual through once before you start.

9. Step 9 of 13

   Build the floor and square it

   

   Build the floor or the floor frame on the pad as the manual shows. Measure both diagonals and adjust until they match, then fasten.

10. Step 10 of 13

    Raise the walls with a helper

    

    On a still day, stand each wall panel with a helper holding it, brace it, and fasten it as the manual says before you move to the next one.

11. Step 11 of 13

    Put on the roof

    

    Set the roof supports and panels per the manual, working from ladders with a helper. Do not stand or kneel on the roof unless the manual says it can take your weight.

12. Step 12 of 13

    Anchor the shed to the base

    

    Fasten the anchors the manual names for your base: ground anchors, screws into the timber frame, or concrete anchors into pavers or a slab. Tighten them as their label says.

    Before you load the shed

    • Every anchor the manual calls for is in and tight
    • The doors open and close without rubbing
    • The floor is level and does not rock
    • No power, lights or water are run to it without an electrician or plumber and a permit

13. Step 13 of 13

    Hang the doors and check it next season

    

    Adjust the doors and seal the seams if the manual calls for it. Store fuel and chemicals as their labels say, never next to a heat source. After the first season, check the anchors and the level of the floor.

Draft guide written from standard practice, not yet reviewed by a licensed pro. Follow product labels where they differ.

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