Bellevue ADU Construction Inspections + CO
Inspections is the on-site construction phase. Bellevue inspectors check the work at defined milestones (foundation, framing, mechanical/electrical/plumbing, insulation, final) before the next phase can be covered up. The Certificate of Occupancy (or equivalent final approval) closes out the permit.
Last verified 2026-05-15
| Typical timeline | 18–30 weeks |
|---|---|
| Direct city fees | $1,200–$3,500 |
| Reviewing department | Bellevue Development Services |
| Submittal portal | Verify with city |
Timeline and fee ranges are project-level averages aggregated from public data and Golden State ADU project history. Authoritative current numbers live in the Bellevue published fee schedule and the city's permit portal — verify before budgeting.
What construction inspections + co actually means in Bellevue
Inspections run on the city's schedule, not the contractor's. Most ADU projects need foundation, under-slab plumbing, framing, sheathing/shear, rough mechanical/electrical/plumbing, insulation, drywall, and final inspections — plus separate inspections from the local water/sewer utility for side sewer and water service.
Each milestone is a hard gate. If framing does not pass, drywall cannot go up. Some cities also require special inspections (geotech, structural, fire-rated assemblies) performed by a third party at the owner's cost.
When all inspections pass, the city issues a final / Certificate of Occupancy. The ADU is not legal to rent or occupy until that document is in hand.
BELLEVUE NOTE
Bellevue inspections are requested, viewed, and cancelled through the MyBuildingPermit inspection portal at inspection.mybuildingpermit.com.
Why Bellevue construction inspections + co hits the high end
- 01Construction speed and weather (concrete, framing, exterior trades)
- 02Inspector availability — most cities require 24 hours notice via the inspection portal
- 03Number of re-inspections triggered by failed inspections
- 04Coordination with separate utility inspections (side sewer, water service)
- 05Owner-driven scope changes mid-construction (each one typically needs a revision permit)
Where the dollars actually come from
- 01Most inspection fees are collected at issuance
- 02Re-inspection fees apply when an inspection fails or the contractor cancels too late — see the city's fee schedule
- 03Third-party special-inspection fees (geotech, structural, fire-rated) are paid directly to the consultant
Exact dollar amounts vary by project. Use the Bellevue fee schedule linked below for the current numbers.
Common homeowner mistakes
Calling a framing inspection before sheathing nail patterns are visible (or after insulation is in) almost always fails.
Separate utility inspections live outside the building permit portal and are easy to forget until they block a milestone.
Renting an ADU before final / CO is a legal and insurance liability and will surface at sale or refinance.
Construction Inspections + CO checklist
These are typical artifacts for an ADU project at this phase in Washington cities. Exact requirements depend on the project and the current Bellevue submittal checklist — verify with the city before submitting.
- Approved plans on site, marked-up with field changes
- Inspection card posted, signed off as inspections pass
- Special-inspection reports filed before the related inspection is called
- Side-sewer and water-service inspections coordinated with the utility
- Address number visible from the street before final
- Certificate of Occupancy / final approval in writing before move-in or rental
When to call a pro
Use a contractor who already understands the Bellevue inspection sequence — most failed inspections trace back to scheduling order, not to bad construction.
Bellevue Construction Inspections + CO questions
How long does Bellevue ADU construction inspections + co take?
For an ADU project in Bellevue, WA this phase typically runs 18–30 weeks. Complex sites, missing reports, first-time submittals, or busy permit seasons trend toward the upper end. Resubmittals reset the clock for that round. These ranges are project-level averages — verify the current published timeline with Bellevue for your specific project.
What does construction inspections + co cost in Bellevue?
Direct Bellevue fees for this phase typically run $1,200–$3,500. That excludes designer/consultant time, impact fees, side-sewer / utility connection charges, and inspection fees that may apply separately. The authoritative current numbers live in the Bellevue published fee schedule.
Which Bellevue department handles construction inspections + co?
Bellevue Development Services handles this phase; submittals and status live in https://mybuildingpermit.com/. See City of Bellevue — Development Services: https://bellevuewa.gov/miscellaneous-land-use-permits.
What's the most common reason construction inspections + co stalls in Bellevue?
Out-of-sequence inspection calls and missing third-party special-inspection reports are the usual stall causes in Bellevue. We pre-screen every submittal against the current Bellevue checklist before it goes to the city.
Do I need a contractor or designer for Bellevue construction inspections + co?
Not legally required for owner-applicants, but in Bellevue every ADU permit eventually touches building, land use, fire, and public works review tracks. Contractor coordination is what keeps the schedule honest once the permit is in motion.
How do I check Bellevue permit status during construction inspections + co?
Bellevue publishes live status inside https://mybuildingpermit.com/. The same record carries application data, review comments, fee balances, and (after issuance) inspection results.
Bellevue permit sources we used
Every claim on this page about Bellevue permits, fees, portals, or departments traces to an official city or zoning-code source. Numbers in the at-a-glance table come from our project history and public data; verify current values with the city before budgeting.
- City of Bellevue — Development Services · city pageMiscellaneous Land Use Permits (ADU)
Bellevue ADUs are reviewed and approved by the land use division as a miscellaneous land use permit.
Accessed 2026-06-03
- City of Bellevue · city pageAccessory Dwelling Unit (ADU) Reform LUCA
Bellevue's 2022+ ADU reform agenda — what changed for attached ADUs and separate ownership.
Accessed 2026-06-03
- City of Bellevue · city pageOnline Permitting Services
Bellevue is 100% paperless — all permit applications must be submitted online via MyBuildingPermit.com.
Accessed 2026-06-03
- MyBuildingPermit (E-PermitHub) · portalMyBuildingPermit — Bellevue jurisdiction
Shared E-PermitHub portal used by Bellevue for application, status, and inspection scheduling.
Accessed 2026-06-03
- MyBuildingPermit (E-PermitHub) · portalInspection Scheduling (MyBuildingPermit)
Bellevue inspections are scheduled, viewed, and cancelled through the MyBuildingPermit inspection portal.
Accessed 2026-06-03