# New building permit 7112143-CN at 5404 20th Ave S, Seattle

Seattle Department of Construction and Inspections permit 7112143-CN: issued Dec 8, 2025 for new building work at 5404 20th Ave S. Construct detached accessory dwelling unit (DADU) accessory to single family residence per standard plan 6794017-SP. Demolish existing detached garage.

- Permit number: 7112143-CN
- Issued: Dec 8, 2025
- Type of work: New building (city: Addition/Alteration, Single Family/Duplex)
- Status: Issued (city: Issued)
- Reported cost: $202,684
- ZIP code: 98108
- All permits at this address: https://nearbypermits.com/seattle/address/5404-20th-ave-s/

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Source: Seattle Department of Construction and Inspections permit data (https://cos-data.seattle.gov/d/76t5-zqzr), City of Seattle. Checked 2026-10-11 13:21 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 5404 20th Ave S: https://nearbypermits.com/seattle/address/5404-20th-ave-s/