Asked on Jun 19, 2019

How do I build a deck on a slope yard?

Laura CooperKmdreamerK. Rupp


I have a large area of grass on a slope in the backyard that I would like to utilize

4 answers
  • K. Rupp
    on Jun 19, 2019

    We were thinking about doing this exact thing with a deck on a hill but we had contractors that talked us into putting a concrete pad on the hill instead of a deck. The reasons they changed our minds was that concrete would be cheaper than decking. I know...I was surprised too. However, one of the considerations is that with concrete you will need to build a retaining wall. much cheaper it is may be a wash when there is retaining wall in the mix. I don't think with a deck you need the retaining wall depending on the support system on the slope. It may be something to think about because concrete does not need the upkeep that decking does. Contractors built our super large patio but when we needed to put a smaller concrete pad in on a slope we did it ourselves.

    We DIY'd the whole thing. Check out my posts: and It might seem complicated but in the post I:

    -laid out how to plan and diagram the concrete pad on the slope

    -diagrams of building a retaining wall and how far we dug down and the cross section of what is going on under the ground

    -math calculations to figure out how much stone and block to order

    -What we did to build the retaining wall.

    -what materials were needed.

    -how we ordered concrete and the math to figure out how much concrete to order

    -the actual building pictures

    If you want to see the final concrete pad that was built in the end....that post is: It was a huge project but we we are so pleased with how it came out. Good luck!

  • Kmdreamer
    on Jun 20, 2019

    The deck would have to be leveled by the legs being shorter by you and longer as the yard slopes so the deck evens out

  • Laura Cooper
    on Jun 26, 2019

    This is no different than a house built on a hill. Your footers are placed at the corners (and additional ones depending on the span), the support posts are placed in the footers and are the height needed for your deck so that there are shorter posts uphill and longer posts down hill. The beams span between the posts and provide a level framework for the deck

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