# Building permits at 400 Spring St, Seattle, WA

400 Spring St, Seattle has 5 building permits on record. The most recent, issued Dec 16, 2024, is for addition or alteration: Construct alterations to existing multifamily building (Executive Hotel) at rooftop for minor telecommunications antenna facility per plan.

| Date | Type | Work | Cost | Permit |
|---|---|---|---|---|
| Dec 16, 2024 | Addition or alteration | Construct alterations to existing multifamily building (Executive Hotel) at rooftop for minor telecommunications antenna facility per plan. | $30,000 | [7040754-CN](https://nearbypermits.com/seattle/permit/7040754-CN/) |
| Jul 18, 2018 | Addition or alteration | Alterations to modify existing minor communications facility (AT&T) on rooftop of existing building per plan. | $30,000 | [6637467-CN](https://nearbypermits.com/seattle/permit/6637467-CN/) |
| Aug 8, 2016 | Addition or alteration | Construct alterations to an existing minor communications antenna facility (AT&T) per plans. | $35,000 | [6517496-CN](https://nearbypermits.com/seattle/permit/6517496-CN/) |
| Sep 9, 2011 | Addition or alteration | Alterations to add antennas and associated equipment to existing minor communications utility on rooftop of hotel building per plan | $15,000 | [6275305-CN](https://nearbypermits.com/seattle/permit/6275305-CN/) |
| Jan 30, 2006 | Addition or alteration | Modification of existing wireless facility to rooftop of Pacifi Plaza Hotel. Per plan. | $10,000 | [6074915-CN](https://nearbypermits.com/seattle/permit/6074915-CN/) |

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Source: Seattle Department of Construction and Inspections permit data (https://cos-data.seattle.gov/d/76t5-zqzr). Checked 2026-10-01 11:25 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/