CrossBeam Pre-Check

Cities, Counties & Builders

Every sheet. Every code.
Cited.

One AI plan-review engine with two faces. Builders run it before they submit. Cities and counties run it after. Same reading, same code, same findings — a different letter at the end.

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Architectural miniature of a small home on a parcel — the kind of plan set Pre-Check reviews

Fails and flags.

Findings come in two kinds. Fails go into the corrections letter — they’re violations with citations. Flags don’t — they’re judgment calls, held out for staff, who can promote a flag into the letter or demote a fail out of it. Every finding carries its citation — grounded in California state code and your local code, read across the full plan set.

AI drafts. Humans decide. Nothing goes out without staff sign-off.

Failgoes in the letter

Smoke alarms not shown in bedrooms — CRC R314.3

Flagheld out for staff

Water heater strapping detail unclear on sheet P-2

Staff can promote a flag into the letter — or demote a fail out of it.

How It Works

Four steps. A human always reviews before anything goes out.

  1. 1

    Upload Plans

    Drag and drop construction plans or a corrections letter. PDF, JPG, PNG, HEIC or TIFF files, any size.

  2. 2

    AI Reviews

    CrossBeam reads every page and cross-references California law + your local code.

  3. 3

    Draft Generated

    A corrections letter — or a builder’s pre-check report before submittal — drafted with code citations and sheet references.

  4. 4

    Human Reviews

    Your staff reviews, edits, and approves. Nothing goes out without a human sign-off.

Watch It Handle a Real Letter

Full corrections analysis on a real Placentia ADU permit — 14 items parsed, verified, and responded to.

Builder

Before you submit.

Upload your plan set. Pre-Check returns four things.

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  • Findings

    Every issue in the plan set, cited to code.

  • Action Items

    Plain language, written to hand straight to your architect or engineer.

  • Questions

    The open items your plans don’t answer.

  • Corrections Preview

    The letter CrossBeam thinks the city will send you — so you can make it never exist.

City & County

After submittal.

The same engine drafts your corrections letter — item by item, code-cited, exported under your letterhead in your own writing style.

  • Draft corrections letter

    Item by item, every finding with its code citation.

  • The voice of your department

    A final pass restyles the export to match how your department writes — not the voice of a robot.

  • Staff stays in charge

    Your staff promotes, demotes, edits, and signs. Nothing goes out without them.

Two Departments That Read Plans

Community development has two desks that review plans. Pre-Check works both — because they read differently.

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Building: it’s math.

Ministerial review is “by right” — objective. The plan either complies or it doesn’t: setbacks, spans, fire ratings, stamps. It’s the most compute-intensive review in the building, and the most automatable.

This is spell check for building code — it catches the missing stamps, absent citations, and overlooked code sections, so reviewers spend their time on the judgment that actually requires their expertise.

Planning: it’s judgment.

Discretionary review is judgment. For cities and counties, Pre-Check runs a fast, checklist-style planning screen so routine items are settled before the judgment starts. For builders, it trends toward advocacy — density bonus law, waivers, builder’s remedy, with the record to back the ask.

Around the engine.

Screener gates what reaches the engine. Scout scopes the project before plans exist. Corrections Analysis handles the letter you already got. Corrections Response closes the loop at resubmittal. And the Permit Assistant answers the questions in between.

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14 items, ~15 minutes

A real Placentia corrections letter handled end to end.

549 jurisdictions with local rules

Plus 16,000+ pages of state code and local rules.

Permits with a plan set

Homes, ADUs, additions, multi-unit, and commercial tenant improvements, plus reroofs, pools, solar, and more.

1st Place

Anthropic’s Claude Code Hackathon 2026 · 13,000 applicants.