HOMEBUILDERS › PERMITTING & AHJ COORDINATION
Solar Permitting and AHJ Coordination for Builders
Every jurisdiction in Puget Sound reviews solar permits a little differently. We track each AHJ’s requirements, submit the paperwork, and schedule inspections so permitting never becomes the reason your framing crew is standing around.
PHASE 1
What Determines Your AHJ
Your Authority Having Jurisdiction, the local government body that reviews and approves your solar permit, depends on where the lot sits. In many parts of Washington, electrical permits and inspections run through the state Department of Labor and Industries (L&I). Seattle, Tacoma, Bellevue, and Spokane run their own electrical departments, so a permit filed the way L&I expects will bounce if it lands on a city desk with different intake rules.
A building permit covers the physical racking and roof attachment, handled by the local city or county planning department, separate from the electrical permit that covers the PV system itself. On a production schedule with lots spread across two or three jurisdictions, that means tracking two permit types per site, each with its own portal, fee schedule, and reviewer.
- Electrical permit: L&I or the city’s own electrical department
- Building permit: local city or county planning department, covers racking and roof attachment
- Design compliance: WSEC Appendix RB solar-ready provisions if the home qualifies
PHASE 2
How We Coordinate Permitting on Your Schedule
We prepare the single-line diagram every AHJ expects: PV array configuration, string sizing, inverter type and rating, overcurrent protection, disconnect locations, conductor sizing, and grounding, all built to NEC Article 690. Small systems under 7.7 kW in Seattle can go in online without plan review for same-day issuance. Systems at 12 kW or above need a full plan review submission, so we size the paperwork to the system, not the other way around.
In Seattle, SDCI and Seattle City Light coordinate their reviews. Submitting both applications at the same time instead of one after the other can save weeks off the schedule, and we default to that parallel submission whenever the jurisdiction supports it. We track each AHJ’s current backlog, too: Seattle’s review times have run longer than normal following the November 2024 code update, and we build that lag into the framing calendar instead of finding out about it mid-build.
What Each Permit Covers
Electrical Permit
Covers the PV system itself, filed through L&I or the city’s electrical department depending on jurisdiction.
Building Permit
Covers roof-mounted racking and structural attachment, filed through the local planning department.
Plan Review Threshold
Systems at 12 kW or larger require a full one-line drawing and manufacturer spec submission in most AHJs.
Final Inspection
Closes out the electrical permit and, once passed, clears the way for utility interconnection sign-off.
Permitting Questions Builders Ask
Which permits does a builder need to pull versus which ones Solphos handles?
Solphos prepares and files the electrical permit and coordinates the building permit paperwork for the racking. The builder’s general permit set (framing, mechanical, and so on) stays with your permit team. We slot our submission into your existing timeline rather than asking you to change your process.
How long should we budget for permit review?
Two to eight weeks depending on the AHJ and whether the system triggers plan review. We submit as early as the schedule allows and flag any jurisdiction running a longer backlog so it does not surprise your closing date.
What if our development spans more than one jurisdiction?
We track each AHJ’s forms, fees, and review timelines separately and submit accordingly. A ten-lot development split between Seattle and unincorporated King County means two distinct permit processes, both handled from one point of contact on our side.
Does the permit process change for a WSEC solar-ready home versus a full install?
A solar-ready rough-in without panels still needs the conduit sleeve and reserved panel space inspected against WSEC Appendix RB, but it does not trigger the full PV electrical permit until panels go on. We handle both paths and keep the paperwork aligned to whichever one your program uses.
Let Us Handle the AHJ Coordination
Tell us where your lots are and we will map the permit path for each one before your framing crew shows up.
