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Development Services

From Concept to Construction

Phone: 503-823-7300

TTY : 503-823-6868

1900 SW 4th Ave, Portland, OR 97201

Sanitation Permits

Sanitation permits are issued for work related to environmental soils & sanitation control such as cesspools, septic tanks and other sewage disposal systems.


New Construction Permit

A residential/commercial new construction permit is required for all new single family construction and new commercial/multi-family construction.

Repair Permit

A residential/commercial repair permit is required to repair an on-site sewage disposal system.

Alteration Permit

A residential/commercial alteration permit is required to replace or increase the size of an on-site sewage disposal system.

Decommission Permit

A residential/commercial decommission permit is needed when the tank, cesspool or seepage pit needs to be pumped to remove all sewage and filled with sand, ¾” minus gravel, or the container needs to be removed and properly disposed of.

Land Use/On-Site Sewage Disposal System Certification

A commercial/residential on-site sewage disposal system certification is a program of Multnomah County managed by the Bureau of Development Services.

Land Feasibility Study

A Land Feasibility Study is conducted to evaluate and determine the suitability of the soils relative to a parcel of land where an on-site sewage system would be used.