TL;DR (generated, confidence: high)
Portal listing residential permitting forms, guides, and reference documents with update dates, covering permits, septic systems, zoning, and design requirements for Portland residential development.
Key points:
Daily Pre-Issuance List for residential and sign permits (updated April 17, 2026) (Documents ↗ )
Daily Pre-Issuance List for Solar, Mechanical (stand-alone), and Residential Deferred Submittals and Revisions (updated April 17, 2026) (Documents ↗ )
FAR (Floor Area Ratio) regulations define relationship of building area to site area to determine how much building is allowed (Documents ↗ )
Septic systems required for properties without physical/legal access to public sanitary sewer; septic approval and decommissioning permits available (Documents ↗ )
Neighborhood Contact requirement (form last updated 12/03/2020) must be completed before land use review or building permit submission (Documents ↗ )
Residential deck guide provides permit-ready prescriptive plans for design, permitting, and inspection (updated February 3, 2026) (Documents ↗ )
Tree removal form required only when removing trees 36 inches or greater on private property (updated February 5, 2026) (Documents ↗ )
Field Issuance Remodel (FIR) Program maintains list of registered contractors (updated March 10, 2026) (Documents ↗ )
Entities: document: Pre-Issuance List | regulation_concept: Floor Area Ratio (FAR) | program: Field Issuance Remodel (FIR) Program | requirement: Neighborhood Contact requirement | form: Land Use Type III Decision Appeal | reference_document: Erosion and Sediment Control Manual | zoning_designation: Airport Noise Impact Overlay Zone
Residential Permits and Inspections — Intro
← Residential Permits and Inspections
ADU conversions > Prepare
Source: ADU conversions > Prepare ↗
Converting an existing part of your home to an accessory dwelling unit (ADU) increases housing and boosts your home’s value. These pages explain the permits you'll need for an ADU conversion and how you can apply for them. Use the navigation menu to learn more about each step.
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Prepare your application materials
This section covers what you need to prepare the right materials for your application. We have rules for how we can accept these materials, so be sure to read through before you submit.
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