Permitting
How long does solar permitting take, start to PTO?
Short answer
For a straightforward residential job, the drawings take a day, plan review commonly runs one to four weeks depending on the jurisdiction, installation is a day or two, inspection is scheduled days to weeks out, and utility permission to operate is usually the longest and least controllable step. The design is almost never the bottleneck — queues are.
The steps, and who controls each one
| Step | Typical | Who controls it |
|---|---|---|
| Plan set drawn | 1 day | Your designer |
| Plan review | 1–4 weeks | The jurisdiction |
| Corrections, if any | Adds a full review cycle | Shared |
| Installation | 1–2 days | You |
| Inspection | Days to weeks | The jurisdiction |
| Permission to operate | Weeks to months | The utility |
Only two rows on that list are yours. That is the whole story of solar permitting timelines.
Why corrections cost so much more than they look like they should
A correction is rarely a day of redrawing. It is a resubmittal that goes to the back of the review queue. In a jurisdiction running a three-week review, one avoidable correction can cost six weeks of calendar — and the crew you scheduled against the original date has to go somewhere else.
This is why getting the set right the first time is worth more than getting it fast. See why solar permits get rejected.
What actually compresses the timeline
- Submit complete. Missing cut sheets and undimensioned pathways are the cheapest delays to avoid.
- Design to the adopted code edition. Not the newest published one.
- Start the interconnection application early. It runs in parallel with plan review in most territories, and it is usually the long pole.
- Know the jurisdiction's quirks before you draw. Local amendments are not in any code book.
- Book inspection as soon as the permit issues. The slot, not the work, is the constraint.
What to tell the homeowner
Give a range with the controllable and uncontrollable parts separated, and name the utility step as the one nobody can promise. A customer who was told plan review is three weeks and PTO is open-ended does not call you angry in week five.