Portland ADU Buyer Checklist
Organize property identity, zoning, permits, utilities, tenancy, inspections, financing, insurance, and deadlines before relying on a represented Portland ADU.
A Portland home advertised with an accessory dwelling unit needs an address-specific record review before a buyer relies on the space's represented use, income, condition, or financing treatment. Use this checklist to organize zoning, permit, utility, tenancy, inspection, insurance, lending, and contract questions without turning general guidance into a compliance conclusion.
Confirm the exact property and represented ADU
Record the street address, parcel identifier, legal description, represented ownership, dwelling configuration, and how the seller or listing describes the additional space. Distinguish a detached structure, attached space, converted area, or other configuration, and keep every representation separate from the records obtained for the property.
Use official Portland sources as starting points
Review Portland's accessory dwelling unit permitting information, ADU zoning information, and permit-research resources. Save the page or record consulted, date accessed, address or project reference, and responsible office. General pages identify research paths; they do not establish an unnamed property's zoning, permit, or compliance status.
Reconcile the represented use with available records
Request the available applications, permits, approved plans, corrections, inspections, completion records, zoning or land-use materials, and seller disclosures for the exact address. Compare the represented layout and use with the record set and observable conditions. A room, kitchen, entrance, or marketing label is not proof of an authorized use or completed permit process.
Build an ADU diligence record index
| Record area | What to identify | What remains property-specific |
|---|---|---|
| Property identity | Address, parcel reference, legal description, dwelling configuration | Whether every record belongs to the exact property and transaction |
| Zoning and land use | Source, map or code reference, correspondence, prior decisions | Current rules, allowed use, limitations, and interpretation |
| Permit history | Applications, permits, plans, corrections, inspections, completion records | Current status, scope, sign-off, expiration, and work remaining |
| Utilities and systems | Service information, meters, panels, plumbing, heating, access | Capacity, separation, condition, code treatment, and upgrade needs |
| Tenancy and occupancy | Leases, notices, deposits, represented occupancy, management records | Current rights, obligations, delivery, possession, and legal effect |
| Transaction file | Inspections, title questions, lender and insurer responses, contract dates | Condition, financing, coverage, acceptability, and closing consequences |
Mark each item received, requested, unavailable, not applicable, or awaiting professional review. Missing evidence should remain an open question rather than being treated as proof of compliance or unrestricted use.
Review utilities and physical systems separately
Ask qualified inspectors and relevant utility or project professionals to evaluate the available records and observable conditions for the exact configuration. Document panels, meters, plumbing, heating, ventilation, access, life-safety features, and other systems relevant to the buyer's intended use. Do not infer utility capacity, system separation, code treatment, or condition from the existence of the space.
Keep tenancy and income questions property-specific
If the space is or was occupied, request the applicable lease, amendments, notices, deposits, payment records, and other seller-provided materials. Have the buyer's qualified advisers review occupancy, possession, disclosure, and transaction questions for the exact facts. This checklist does not state a tenancy result, rental eligibility, income amount, vacancy status, or legal conclusion.
Coordinate financing, insurance, inspection, and deadlines
Provide the exact address, represented configuration, and available records to the buyer's lender, insurance professional, inspector, attorney, and other relevant advisers early enough to evaluate their requirements before applicable contract deadlines. Assign an owner to each unresolved question and request written responses tied to the property.
Compare properties using buyer-selected criteria such as price range, property form, intended use, records obtained, inspection findings, financing and insurance requirements, and transaction timing. Avoid protected-class targeting, steering, or subjective suitability claims. The HUD Fair Housing Act overview provides the federal framework.
Turn the file into a property-specific plan
Summarize the exact address, represented ADU configuration, records received, unresolved zoning and permit questions, utility and tenancy materials, professional assignments, and decision deadlines in one diligence file. Own It Northwest can help coordinate the property search and transaction workflow while each authority and qualified professional addresses matters within their scope.
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