DIY Modern Shed Build on a Slope

Here’s my version of the Modern Shed. It’s based on the Petaluma Studio and Modern Shed by Brock Hammill designs, except my foundation was a bit different with being on a slope. I created drawings in Sketchup which guided the dimensions based on amount of materials I had. The overall footprint is 12′ x 16′ and total cost was around $500. Sliding barn door was made with angle iron and a piece of ipe wood leftover from my neighbors house. The slider is based on an instructable and uses two skateboard wheels. Technically, it’s still open-air but I’m planning on hanging plexi for the window openings. The roof overhang makes for really dry conditions inside. My favorite part is the tree-climb roof access!

I’m offering a $3 digital download for my design files click here for Paypal link

Here’s the completed design:

Inspiration and design references:

  1. Modern Shed by Brock Hammill – this photo was always at the back of my mind during the build. Love the sliding barn door, modern roof/wall construction and rad paint colors.
  2. Petaluma Studio by Joseph Sandy – intensively studied these photographs during the design stage of my shed.
  3. David van Alphen’s Modern Shed – Great series of images and construction. My build was a bit larger than this. When something wasn’t working right with the Petaluma series, I’d reference this shed.
  4. Another modern shed build from dirt digging sisters: diy modern shed
  5. DIY Modern Shed project
  6. Avalon Restoration by Thomas Kayser
  7. Modern shed dimensions from – referenced these in the Sketchup design phase
  8. I was building on a slope so this How to Build a Post and Beam Shed Foundation on a Slope was super useful
  9. Instructable on how to build a sliding barn door with skateboard wheels

Building process:

Fun facts:

  1. I cut a telephone pole in thirds and used them for the rear post foundation. Cutting lap joints on the posts with a chainsaw was really challenging.
  2. The back wall was really heavy, we lifted it with a tractor and the whole thing nearly fell down the slope.
  3. The front roof-overhang area stays really dry, plants have a hard time growing beneath it.
  4. Rain splashes against the ground and makes the shed dirty.
  5. Still don’t have windows installed but I’m planning on clear plexi because it’s super easy to cut.

Previous shed had to go:


  1. Paint whatever you can before building.
  2. Have a plan drawn out. As with cooking, try to have everything prepped before starting.
  3. Buy an air gun nailer.
  4. Check craigslist for old decking boards or posts that people are tossing.
  5. Buy good quality paint, I used Sherwin Williams Exterior.

Sketchup Design:

I’m offering a $3 digital download for my design files click here for Paypal link


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