Generator Installation Permit Design Services — AHJ-Ready in 24–48 Hours
Permit Design prepares generator installation permit plan sets and permit drawings for residential and commercial generator installations across all 50 US states. Every plan set covers transfer switch wiring, load calculations, and NEC Article 702-compliant electrical drawings — built to your local AHJ’s requirements and delivered in 24–48 hours.
We handle standby and portable generators for homes, businesses, and critical facilities. If your AHJ requests revisions, we handle them at no extra charge.
HOW IT WORKS:
1. Submit — Send us your project details: site address, generator make and model, transfer switch type, and electrical panel information. Takes under 5 minutes.
2. Draft — Our permit design specialists prepare your complete generator permit plan set — site plan, load calculations, transfer switch wiring diagram, one-line diagram, and all NEC-required documentation.
3. Deliver — Your AHJ-ready generator permit plan set lands in your inbox within 24–48 hours, ready for submission. Revisions handled at no extra charge until approved.
What’s Included in Every Generator Permit Plan Set
Cover Sheet
Project scope, generator specifications, adopted NEC edition, and complete project data — formatted to your AHJ’s standards.
Site Plan
Site layout showing generator location, fuel source, clearance distances from structures, and utility entry points — per local zoning and fire code requirements.
Transfer Switch Wiring Diagram
Complete transfer switch wiring — manual or automatic transfer switch (ATS), interlock details, and utility disconnect documentation per NEC Article 702.
One-Line Diagram
Electrical schematic from utility service through transfer switch to generator output — NEC compliant for your jurisdiction’s adopted code edition.
Fuel System Details
Generator fuel type, tank sizing, piping layout, and clearance documentation — propane, natural gas, or diesel as applicable.
Labels & Placards
All NEC-required labels for generator circuits, transfer switch identification, and system signage per adopted code edition.
Equipment Datasheets
Manufacturer spec sheets for the generator unit, transfer switch, and all major system components.
Try Us Free — One Project, No Commitment
New to Permit Design? Send us your first residential generator installation project and we'll deliver the complete permit plan set free of charge. No contracts, no setup fees, no catch. Just see the quality for yourself — then decide.
Available for first-time clients only. One free plan set per company.
Generator Installation Types We Cover
Residential Standby Generators
Whole-home standby generator permit plan sets — automatic transfer switch wiring for natural gas and propane generators
Solar + Generator Systems
Combined solar PV and standby generator permit plan sets — transfer switch coordination between solar inverter, battery, and generator
Residential Portable Generators
Portable generator permit plan sets with manual transfer switch or interlock kit wiring for residential use
Generator + Battery Backup
Generator permit plan sets with battery storage integration — automatic switchover between grid, battery, and generator
Commercial Standby Generators
Commercial and industrial standby generator permit plan sets — automatic transfer switch, critical load panels, and utility coordination
For state-specific AHJ requirements, visit our Solar Permit Drawings page or find your state directly below.
Solar Permit Drawings →
FAQ SECTION:
How long does a generator permit plan set take?
We deliver completed generator installation permit plan sets within 24–48 hours of receiving your project details. Rush same-day delivery is available on request.
What NEC articles apply to generator permit drawings?
Generator installation permit plan sets must comply with NEC Article 702 (Optional Standby Systems) or NEC Article 701 (Legally Required Standby Systems) depending on the application. Transfer switch wiring must comply with NEC Article 230 and the specific transfer equipment listing requirements.
Do you cover both residential and commercial generator permits?
Yes. We prepare generator permit plan sets for residential standby generators, portable generator interlock installations, commercial standby systems, critical facility backup power, and combined solar-plus-generator configurations.
What transfer switch types do you cover?
We cover all transfer switch types — manual transfer switches, automatic transfer switches (ATS), generator interlock kits, and critical load subpanels. Every plan set documents the specific transfer method and NEC compliance requirements for your AHJ.
What information do you need to prepare a generator permit plan set?
We need the site address, generator make, model, and fuel type, transfer switch type, and electrical panel information. Our order form walks you through exactly what to provide.
Which states do you serve for generator permit design?
We serve electrical contractors and installers across all 50 US states — permit requirements vary significantly by state and local AHJ, and we maintain current knowledge of every jurisdiction.