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Permit guides

ADU Permits in Elk Grove: a Homeowner's Guide

Electronic submittal, published review clocks, and the details that trip up first filings — in plain language.

Last updated October 2026. Rules change; always confirm current requirements with the city before you build.

Who handles your permit

ADU permits in Elk Grove come from Development Services — Building Safety & Inspection, at 8401 Laguna Palms Way, Elk Grove, CA 95758 — (916) 478-2235, Bldonline@elkgrovecity.org. Everything is submitted electronically through the city's file drop: plans and supporting documents go in as PDFs, unprotected, with each document type (plan set, truss calculations, energy forms) uploaded as a separate file. Paper submittals aren't part of the process.

What you can build

Elk Grove follows the state baseline: no minimum lot size, one ADU plus one JADU per single-family lot, no added parking required near transit, and no replacement parking when a garage is converted.

Published review timelines

Elk Grove is unusually transparent about its clocks: a permit technician checks your submittal for completeness within 48 hours, the first plan review runs a minimum of 10 business days, each subsequent review cycle takes 5 business days, plus 24–48 hours for processing. That only works if the submittal is clean — and there's a hard edge most people miss:

What goes into the submittal

• Application for Permit form
• Site plan, floor plans, elevations, structural details
• Title 24 energy documentation
• Each document as a separate, unprotected PDF — secured or portfolio PDFs get rejected

Where applications usually get stuck

• Grading triggers Public Works. Moving 350+ cubic yards of soil, clearing an acre, or interrupting drainage pulls in a separate Public Works review — (916) 478-2256.
• File format rejections. Secured PDFs, scanned plan sets, or bundled document types bounce at intake before review even starts.
• Smoke and CO alarms. Additions and alterations over $1,000 require compliant smoke and carbon monoxide alarms — a sign-off item that's easy to overlook.
• Septic and wells. On lots without public sewer, capacity questions can add an outside agency to your timeline.