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Patio Below Existing Grade

Discussion in 'Residential Foundation Codes' started by Apt318, Mar 5, 2017.

  1. Apt318

    Apt318 Registered User

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    I'm planning a patio under a new deck. To accomplish that we would need to drop current grade another 2 ft for clearance. Can this be done or does the foundation have to be certain depth below grade?
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    #1 Apt318, Mar 5, 2017
    Last edited by a moderator: Mar 6, 2017
  2. fatboy

    fatboy Administrator

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    You need to check with the local Building Department to see what the required frost depth is in your jurisdiction. You may have to prove that the need grade elevation will not subject the existing footing depth to potential frost. A call or visit to them is in order.

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  3. cda

    cda Sawhorse

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    Welcome
     
  4. Paul Sweet

    Paul Sweet Sawhorse

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    You might have to underpin your existing footings if the patio butts up against the foundation, so the footings are the proper depth below the new lower grade.
     
    tmurray likes this.

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