Commercial plan sets, drawn to clear plan check
Rooftop, carport and ground-mount systems on three-phase services. Single-lines, fault current, voltage drop, fire pathways and structural details in one permit set, with electrical and structural PE stamps when the job needs them.
What changes once a system passes 50 kW
A commercial set isn't a bigger residential set. The service, the interconnection, the fire rules and the structure all change, and plan checkers review it against different code sections.
| Item | Typical home | Commercial, 50–500 kW |
|---|---|---|
| Service | 120/240 V single-phase, 200 A panel | 208Y/120 V or 480Y/277 V three-phase, switchboards, often a transformer between inverters and service |
| Interconnection | Backfed breaker and the 120% busbar check | Supply-side taps, switchgear and service upgrades, sized and shown on the single-line |
| Fire access | 36-inch pathways and ridge setbacks | 4 ft perimeter pathway (6 ft on buildings over 250 ft), arrays split into sections no larger than 150 × 150 ft |
| Structure | Rafters, lag spacing, a 4 psf check | Membrane roofs, ballast layouts, steel joists, carport and ground-mount foundations |
| Calculations | Wire size and voltage drop | Plus fault current, arc-flash labeling, transformer and conductor schedules |
| Stamps | Often not required | Electrical and structural PE stamps on most jobs |
What's in a commercial plan set
Every set follows the same sheet order, so plan checkers and your crew find things where they expect them. Sheets are added for carports, ground mounts and batteries.
- T1.0Cover & project dataCodes, design wind speed and exposure, occupancy, scope of work, equipment counts
- T1.1General & construction notesListing, grounding, rapid shutdown and installation notes
- A1.0Site planProperty lines, building, equipment pad, conduit and trench routing, utility meter
- A1.1Roof planArray sections, fire pathways with dimensions, roof access points, rooftop units kept clear
- S1.0Structural & rackingAttachment or ballast layout, racking details, carport or ground-mount foundations
- E1.0Electrical layout & stringingInverter and combiner locations, string map, conduit runs
- E1.1Equipment elevationsWall or pad elevation with clearances and working space
- E2.0Single-line diagramThree-phase single-line, transformer, switchgear, point of interconnection
- E2.1Wire, conduit & calculationsConductor and conduit schedule, voltage drop, fault current
- E2.2Placards & labelsDirectory placard, rapid shutdown and arc-flash labels with locations
- D1.0Data sheetsCurrent module, inverter, racking, battery and switchgear sheets showing listings
Rooftop
Ballasted or attached racking on membrane, metal and built-up roofs, laid out around rooftop units, hatches and drains.
Carport
Canopy layouts over parking, column grid, clearances and foundation details for the structural engineer.
Ground mount
Array rows, trenching, equipment pads and transformer details, with conductor runs sized for voltage drop.
Battery storage
Commercial battery cabinets and enclosures on the single-line and site plan, quoted per project.
Commercial plan sets, priced by system size
Each price is for a complete permit set with one round of plan-check revisions. Send the job details and we confirm a fixed quote before any work starts.
Small rooftop and carport jobs, usually one or two inverters on a 208 V or 480 V service.
Multiple array sections, AC combiners, and often a transformer or service upgrade.
Large rooftops, carport fields and ground mounts with switchgear and trenching.
50% deposit to start, balance on delivery of the permit set. Stamp prices depend on the state, the roof and the mounting type.
From site data to an approved permit
You send what you have from the site. We draw the set, coordinate the stamps and answer the plan checker until the permit is issued.
- Send the jobUtility bill, service size and voltage, roof or mounting type, photos and any existing drawings.
- Fixed quoteWe confirm the scope, the sheets and whether stamps are required, then send one price.
- DraftingThe full set is drawn after the deposit, with the layout reviewed with you before the electrical sheets.
- PE stampsElectrical and structural engineers review and stamp the set where the jurisdiction requires it.
- Plan checkYou submit; we answer the reviewer's comments and revise the set.
Residential plan sets for installers
The same work we've done since 2014 for solar contractors: complete residential permit sets with PE stamps, delivered in 24 hours, with plan-check comments answered.
What they say
Thank you for your fast service especially with designs and permitting. Makes it a lot easier for me to work with someone who knows what they're doing.
Douglas Gilbert, Project Manager
I like the fact you answer my calls at any time even after hours and be able to work out the last details of a project etc. This means alot to me.
Chris Chavez, SDG Solar
Request a quote
Send what you have. Missing details are fine; we'll ask for them in the quote.
323.682.2282
plans@solarsurveypro.com