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City of Phoenix official website

Grading and Drainage

The City of Phoenix requires the review of grading and drainage plans for all construction projects both residential and non-residential. Grading and drainage plans are classified as civil plans and are reviewed under the civil plan review process. Additional information is listed below.

Residential Single Family/Single Lot Only

Single lot pertains to the development of one lot within a previously approved subdivision or an infill lot.

Single lot pertains to the development of one lot within a previously approved subdivision or an infill lot. 

Commercial/Subdivision/Multifamily/Industrial

Subdivision pertains to the creation of three or more lots on more than 2 1/2 acres.

Grading and Drainage Plan Checklist

Grading and Drainage Prelog - Commercial, Multifamily and Subdivisions

Grading and Drainage Prelog - Plot Plan