How long does a solar installation take in Seattle?
In Seattle, the typical finished solar installation took 43 days from permit to final inspection (1,875 finished of 2,085 permits issued from September 2022 to September 2024; 10% had no final inspection on record by September 2026).
The two steps
The numbers behind the chart
| Step | Median | Middle half | Permits | Permits issued |
|---|---|---|---|---|
| Permit to final inspection | 43 days | 24 days to 76 days | 1,875 | September 2022 to September 2024 |
Solar installers with the most jobs in Seattle
| Rank | Contractor | Jobs | Contact |
|---|---|---|---|
| 1 | Puget Sound Solar Seattle | Visit website | |
| 2 | A&r Solar Corp Seattle | Call (206) 707-9937 | |
| 3 | Sunergy Systems Seattle | Call (206) 297-0086 |
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Why it takes this long
- 81% of finished jobs passed final inspection within 90 days of the permit.
- Of the 2,085 permits issued from September 2022 to September 2024, 210 (10%) had no final inspection on record by September 2026. They may still be under way, dropped or never inspected; the records do not say which. They are left out of the build time; any of them that finishes will have taken more than two years, so counting them would make the typical time longer.
- The permit wait is not shown: 64% of 1,085 permits carry no application date, so the rest would not show the typical wait.
Days are counted between the dates on each city permit: applieddate, issueddate, completeddate. Median and middle half: half of the jobs took longer than the median; the middle half runs from the 25th to the 75th percentile. A figure is shown only when it rests on 30 or more permits. Kinds of work are sorted by the same rules as our contractor lists. Source: Seattle Building, Electrical and Trade Permits (data.seattle.gov 76t5-zqzr, c4tj-daue, c87v-5hwh), read 2026-09-24. The same figures as data: solar.json.