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Seattle · permit 7136334-RR

1501 4TH AVE

This project will replace failed waterproofing at an existing 4th floor roof area. The existing low-slope roof assembly is split-slab construction consisting of a structural concrete substrate a waterproofing membrane applied directly to the structural slab approximately 2" of rigid insulation above the waterproofing membrane and a 2" concrete topping slab that serves as the finished roof surface. The existing waterproofing system is original to the building and is experiencing failures th

Permit type
Roof
Class
Non-Residential
Status
Issued
Issued
2026-04-01
Declared value
Subscribers only

Data as of 2026-09-06. View the city's record