STR Cost Segregation in Seattle, WA

Seattle STR cost segregation: keep the operator license separate from the building’s asset records. Review local resources, study records, and a property-specific planning example.

Stratum Cost Segregation · Updated September 27, 2026

Keep the operator license separate from the building’s asset records

Seattle distinguishes the STR operator license from the business license tax certificate. Keep both applicable records linked to the correct property and unit rather than treating one account as an asset register. Seattle short-term rental regulations.

Define the property study

For a backyard cottage or attached apartment, document its ownership and construction independently from the main dwelling. Identify common access, utility connections, and equipment serving both. If the unit was previously leased long term, provide its existing depreciation history before adding new furnishings.

Records that resolve the main questions

A scoping example

A detached cottage already used as a rental is furnished for shorter stays. The owner buys beds and kitchenware but makes no new building acquisition. Distinguish those additions from the existing structure so the provider can coordinate with the prior schedule.

Illustrative documentation scenario; not a completed client study or a savings estimate.

Does obtaining a new operator license restart the property’s basis?

No automatic reset follows. Give the preparer the acquisition, construction, and prior-use history, then have the study’s scope reconciled to those records.

Prepare for a Stratum study

Stratum provides nationwide property-study services, with discovery calls through AE Tax Advisors. Confirm the engagement scope, fee, evidence requirements, and CPA handoff. A service-area page does not represent a local office. Local operating approval and federal depreciation are separate questions.

Related service areas

Local source checked September 27, 2026. Confirm current address-specific requirements with the relevant authority. This page provides planning information, not a determination of rental eligibility or tax treatment.

Discuss your property with AE Tax Advisors

Bring your acquisition records, rental-use history, and current depreciation schedule to discuss whether a Stratum study fits.

Book a Cost Seg Discovery Call

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$1 per square foot · $2,000 minimum per property.

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