Miniature architectural plan sheet with red correction marks under a magnifying glass — the corrections letter being decoded against the plans.
For Builders
CrossBeam Corrections Analysis

The corrections letter, decoded.

Upload the city's letter and your plan set. Get your plans annotated page by page against every numbered item — and a professional response letter drafted, ready to send back.

Live now for California builders.

Annotated plan setResponse letterVerified code research
1st Place — Anthropic's Claude Code Hackathon 2026 · 13,000 applicantsBuilt on 480+ California city codes and 16,000+ pages of state code and local rules.

Who It's For

GCs & homeowners

Staring at a dense PDF that landed months after submittal.

Architects & engineers

You'd rather review a drafted response than write one from zero.

Expediters

Running twenty of these at once.

The manual version.

Without it: your engineer spends days parsing each item, pulling each code section, cross-referencing the plans, and writing a response the city will take seriously — at engineer rates, while the resubmittal clock runs. CrossBeam did the Placentia letter in 15 minutes.

What You Get

Annotated Plan Set

Every numbered item mapped to the exact sheet it lives on. Not "see structural notes" — this sheet, this detail, this fix, because item 12 says so — with the code section pulled and explained.

Response Letter

Professional tone. Item-by-item responses with sheet references and code citations. Technical justifications where they're needed — sewer capacity, wind loads, drainage slopes. Ready for resubmittal after your review.

Verified Code Research

Every cited section pulled and cross-referenced — CRC, CPC, CBC, Title 24, your city's municipal code — all in one place instead of scattered across six websites.

How It Works

  1. 1

    Upload the letter and the plans

    Give CrossBeam the city's corrections letter and the plan set it marked up.

  2. 2

    Every item lands on its sheet

    Each numbered item is mapped to the exact sheet and detail it lives on, with the cited code section pulled and explained.

  3. 3

    Review the drafted response

    A professional, item-by-item response letter — sheet references, code citations, technical justifications — ready to send back once you sign off.

Fourteen Items. Fifteen Minutes.

A real 14-item corrections letter from Placentia, analyzed end to end.

How It Fits — The CrossBeam System

Corrections Analysis is for the letter you already got. Pre-Check is for the one you never get — run it before you submit next time, and see the corrections letter as a preview instead of a certified envelope. And when a question comes up mid-fix, the Permit Assistant answers it with citations.

AI Drafts, Humans Decide

CrossBeam drafts; you decide. The annotated plan set and the response letter arrive ready for your review — nothing goes back to the city until you've signed off.

Honest Scope

Corrections Analysis reads across 480+ California city codes and 16,000+ pages of state code and local rules to map the city's letter onto your plans and draft the response. It's a draft for your review — not a stamped engineering revision. Where an item calls for redesign, your design professional still makes the call.

15 min

full letter analyzed

16,000+

pages of code behind every review

480+

California cities' codes researched

The Letter Is Homework. Hand It In.