Redline Permit AI plan check for California cities Start a pilot
AI-assisted plan check

Every correction circled on the sheet it belongs to.

Redline Permit gives building departments an AI first read of each plan set. Reviewers approve, edit or reject every comment, and applicants get a numbered list with a clip of the exact spot on their drawings.

City of Monrovia · sign inBring it to your city
Piloting in the San Gabriel ValleyTitle 24 2025 editionGoogle Drive and Dropbox submittals
Example ADU · Building plan checkCorrections · round 2A2.1
1CRC R310.2.1BuildingCritical

Bedroom 2 escape window. W3 gives about 3.5 sf clear. Provide 5.7 sf net with a sill no higher than 44 in.

2CRC R302.3Building

Dwelling unit separation. Show the 1-hour separation between the house and the attached ADU, extended to the roof sheathing.

How corrections work

Watch one sheet go from upload to resolved.

The AI marks up the set, a city reviewer decides what goes out, and on the resubmittal Redline checks each numbered comment against the new sheet. It plays on its own; tap any step to jump.

30'-0"22'-0" BEDROOM 2108 SF BATHLIVING / KITCHEN W3 4'-0" x 2'-4" W3 5'-4" x 4'-0" 1-HR WALL A2.1FLOOR PLANCYCLE 1 PDF from Drive CRC R310 egressCRC R302 sep.CEC 210.12 AFCICPC 408.3 valveMMC 17.44 ADU 1 2
STEP 1 / 6Sheet A2.1 arrives from Google Drive

Correction list · A2.1

1CRC R310.2.1AI draft

Bedroom 2 escape window. W3 gives about 3.5 sf clear; provide 5.7 sf net.

2CRC R302.3AI draft

Unit separation. Show the 1-hour wall between house and ADU.

Round 1ApplicantClock day 0
The AI drafts; a city reviewer approves every comment before it goes out.
How a plan set moves

From submittal to permit pickup, in one shared record.

The same eight stages applicants and reviewers see in the portal. Correction rounds loop back until the set is clean, and every round is counted.

SubmitApplicant
AI first readRedline
City reviewReviewer
CorrectionsApplicantRound 2
Resubmit & recheckBothLoops until clean
Plan check approvedReviewer
Other agenciesApplicant
Permit pickupCity
OwnerProperty ownerSees status and rounds
DesignerArchitect or designerGets every numbered comment
ApplicantWho submitsUploads and resubmits
ReviewerCity plan checkerApproves every comment
One portal, every department

Each application goes to the right desk, with its own reviewer.

Building & Safety · most applications start hereBuilding plan check New homes, ADUs, additions, remodels, multifamily and commercial. One short form, a PDF from Google Drive or Dropbox, and every comment comes back clipped from the sheets and numbered. AI first read in minutes, not weeks →
PlanningPlanningZoning review before plan check: larger ADUs, design review, Planning Commission.Hover: which ADU path? Which Planning path is an ADU? 800 sf or lessPlanning takes a quick look at setbacks, height and location, then it goes straight to Building plan check. Over 800 sfFull Planning review first, under the state 60-day clock. Plan check starts after Planning signs off.
Public WorksPublic WorksWork in the street or parkway, utilities, grading and drainage.
FireFireSprinklers, alarms, access and operational permits.
CityCity permitsSpecial events, filming and other city-issued permits.
Who it serves

Built for both sides of the counter.

For cities

Building departments

  • Reviewers see only their own files; an admin sees and searches everything
  • Task lists sorted by urgency, project size and days waiting
  • Standard notes checked on every sheet the moment a set arrives
  • Statutory clocks, like the 60-day ADU deadline, on every file
  • One flat fee for the whole city, not per seat
For applicants

Owners, designers and architects

  • Each application tracked on its own, with its department and reviewer
  • Numbered circles on your sheets that match the comment list
  • Owner, designer, applicant and reviewer contacts on one screen
  • See which round you're on and what's left before pickup
  • Submit straight from Google Drive or Dropbox
California first

Checked against the codes California cities enforce.

Title 24 · 2025Building, Residential, Electrical, Mechanical, Plumbing, Energy, Fire, CALGreenIn effect since January 1, 2026, plus each city's local amendments
Gov. Code 66310–66342ADU and JADU lawSetbacks, size, height and the 60-day approval clock
Gov. Code 65852.21 · 66411.7SB 9Two units and lot splits in single-family zones
Municipal codeEach city's zoning and building titlesA rule pack per city, confirmed with its staff
Security and data

The city keeps its records. The AI never approves anything.

Drawings stay where they areApplicants share only the files they pick. Redline keeps small clips, about 1–2 MB per project.
City sign-in with security keysStaff use the city's own accounts. Admins sign in with hardware keys or passkeys.
Every action loggedEach view, approval and change goes into an audit log the city can export.
Reviewers decideEvery AI comment cites a code section and waits for a reviewer. Nothing reaches the applicant unapproved.
City portals

Every city gets its own address, codes and queues.

Applicants and plan reviewers sign in at their city's page. Each portal carries that city's municipal code, standard notes and departments, and keeps its records apart from every other city.

PilotMonroviaredlinepermit.com/monroviaSign up or sign in as an applicant, plan reviewer or portal admin. Building, Planning, Public Works and Fire, with the Monrovia Municipal Code built in.Open the Monrovia portal → Your cityAdd your cityredlinepermit.com/yourcityTell us about your department below and we'll set up a city profile.
Pilots

Bring Redline Permit to your city.

Tell us a little about your department. We'll reply within one business day to set up a walkthrough with real plan sets.

  • A city page at redlinepermit.com/yourcity with your codes and departments
  • Applicants submit from Google Drive or Dropbox; PDFs stay in their accounts
  • Reviewers approve every AI comment before it goes out