Foundation or retaining-wall permit valuation formula
$15per square foot of wall face / official permit valuation formula when an applicant value appears understated or inaccurate
Portland city benchmark / General contractor context / Foundations and retaining walls
Portland uses this amount to establish fair-market construction value for permit-fee purposes. It is not a contractor bid, invoice, permit fee, or prediction of total project cost. Engineering, excavation, drainage, demolition, access, materials, finish work, and other scope can materially change actual cost. Contractor mailing city does not establish service area.
Portland Permitting & Development valuation methods source