PLUMB BOB IS A CHAT — YOU TYPE OR TALK, IT FILLS THE REPORT.

Inspection notes→compliant XML, in 30–45 minutes.

Plumb Bob is a conversational co-pilot for residential appraisers preparing for the November 2, 2026 UAD 3.6 mandate. Inspection notes to compliant XML, without the form-filling — plus a compliance check that flags what would bounce, before you submit. Keep the forms software you already use — Plumb rides along.

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plumbvaluation.com INVITE BETA PRIVATE TO YOUR ACCOUNT · NOT A GSE-VERIFIED DELIVERY PLATFORM — RIDES ALONGSIDE THE VERIFIED SOFTWARE YOU ALREADY USE

PLUMB BOB · BETASEP 2026

Mandate: UAD 3.6 / URAR · Nov 2026FEDERAL
Report cycle: 30–45 minPER REPORT
Validation: MISMO 3.6LOCAL
Output: XML + PDFURAR
VALUE AGREEMENT · GSE SAMPLES: 86–96%BENCHMARK

Inspect Type Photograph Click Narrate Tab Deliver.

§ 00WATCH · SIX-MINUTE DEMO

A full appraisal, start to file.

Fictional Miami SFR, uncut —
notes in, XML + PDF + compliance check out.

§ 01HOW IT WORKS · THREE STEPS

Describe the property. Confirm each section. Get the file.

NO NEW SOFTWARE TO LEARN
IT'S A CONVERSATION

01 · TALK OR TYPE

Describe the property the way you'd tell a colleague — or dictate it, or upload your field notes as a PDF. No fields to find.

02 · REVIEW, DON'T RETYPE

Plumb Bob drafts each section; you confirm or correct it. It refuses to finish a report that contradicts itself.

03 · GET THE FILE

Compliant UAD 3.6 XML, a URAR PDF, and a submission ZIP — you still deliver through your own forms software.

PLUMB BOB · LIVE SESSIONUAD 3.6

You: Two-story brick colonial, built '92, four beds, two and a half baths, 2,640 above grade. Partially finished basement.

Plumb Bob: Got it — year built 1992, 4 bed / 2.5 bath, 2,640 sqft GLA. Basement noted; I'll ask for the below-grade split before we finish.

You: Architectural shingle roof, replaced after hail — maybe six years ago.

Plumb Bob: Roof: architectural shingle, ~6 yrs. Ready for photos when you are — or type "skip".

§ 02CAPABILITIES · 6 OF 6 SHIPPING

Everything the report asks for. Captured in conversation.

FORM COVERED
UAD 3.6 URAR · single-family
OUTPUT XML 3.6 · PDF · ZIP

CAP · 01

Conversational property data capture.

Describe the subject in plain language. No tabs, no forms, no field-by-field navigation.

CHAT · VOICE · STRUCTURED

CAP · 02

Photo classification & condition scoring.

Drop in field photos. Plumb Bob identifies rooms, fixtures, and surfaces — and flags condition evidence for your rating. It never assigns a C1–C6 you didn't state.

VISION · CONDITION EVIDENCE · YOUR RATING

CAP · 03

Automated, traceable comparable adjustments.

Every line traceable back to the documented market rule it came from. Defensible by design.

RULE-BASED · SOURCE TRACE

CAP · 04

UAD 3.6 schema-compliant XML output.

Generated against the published UAD 3.6 schema and checked against the Appendix H-1 rules before you submit through your own verified software.

XML · XSD · PRE-SUBMISSION CHECK

CAP · 05

Draft URAR PDF, generated in the same pass.

Reviewable draft in the standard URAR layout. XML and PDF stay in lockstep.

URAR · SINGLE-FAMILY · DRAFT WATERMARK

CAP · 06

Local MISMO 3.6 compliance validation.

Validated before delivery — full XSD plus all 628 Appendix H-1 rules that apply to a single-family report (508 Fatal, 120 Warning), each one proven to fire, with the exact count printed on every report. Errors surfaced in plain English, not stack traces.

XSD · APPENDIX H-1 · EXACT COUNTS

§ 03MEASURED AGAINST THE GSEs' OWN SAMPLES

We publish our score. Nobody else does.

BENCHMARK
APPENDIX D-1 · SF1–SF5
RE-SCORED ON EVERY CHANGE

You don't have to take our word for it.

Fannie Mae and Freddie Mac publish five complete sample scenarios with the official UAD 3.6 file each should produce. We run every scenario's narrative through Plumb Bob and compare our output to theirs, field by field — ground truth by construction.

86–96%value agreement with the official file on captured fields, across all five scenarios — today Plumb captures roughly half the official file's fields, and that number is published too

628/728Appendix H-1 rules evaluated deterministically and proven by a mutation test each — the 100 not evaluated are report types Plumb does not build yet; rule-by-rule table

0false positives tolerated: any check that flags the GSEs' own passing samples is removed

What Plumb captures, it gets right — and what it doesn't check, it says plainly. A PASS here never claims more than it measured. That's the whole product.

§ 04STATUS · PRIVATE TESTING

Production timed to the November 2026 mandate.

NEXT WINDOW
SEP–OCT 2026 · PILOT
RESPONSE ≤ 2 BUSINESS DAYS

● Invite beta

We're onboarding our first beta appraisers now.

Have an invite code? Sign up directly. Otherwise write to hello@plumbvaluation.com with your license state and typical report volume.

One person builds and runs Plumb — your reply comes from the builder, usually within a day.

Roadmap · v1.0 timing

H1 · 2026: Built and benchmarkedScored against the GSEs' own sample appraisals
Q3 · 2026 · NOW: First beta appraisersInvite codes · you'd be among the first
Sept–Oct · 2026: Hardening on live reportsAll 628 rules that apply to a single-family report evaluated and proven — see the coverage table
Nov · 2026: v1.0 — production releaseAligned with the federal mandate