PropTech Venture Blueprint

Build the Browser Extension That Tells Buyers Is This Listing Actually Real?

A 115-page, 35-chapter blueprint for building TrueList — a browser extension and verification layer that cross-checks any real estate listing against authorized data sources in seconds and returns an honest confidence score, not a false single number. Written for a solo founder or small team, with a self-designed methodology and a legally-cautious, no-scraping data strategy.

$79 $12.99 today · 84% OFF · 7-day money-back guarantee
115 pages, PDF + DOCX 6 brand-styled charts & diagrams 12 ready-to-use templates
7.06%Zillow's own off-market Zestimate median error
2024CFPB federal AVM Quality Control Standards Rule
2025NAR's MLS Options for Sellers policy change (8.15)
0Fabricated stats — every number is cited or labeled
The Problem

Listing sites don't always agree with each other — and buyers find out the hard way

A property can show "active" after it's already sold. A price can go stale between visits. And automated valuations can miss by tens of thousands of dollars on the very homes where buyers most need an honest number — off-market properties with no recent comparable sale.

  • Zillow's own published data shows a median Zestimate error of just 1.94% for on-market homes — but 7.06% for off-market homes, where no active listing keeps the estimate anchored (Zillow, via ListWithClever, updated April 2025).
  • The CFPB's federal AVM Quality Control Standards Rule (2024, under Dodd-Frank Section 1125) now formally governs how automated valuation models must be built and audited — a signal that "just trust the algorithm" is no longer an acceptable standard.
  • NAR's 2025 policy changes (Multiple Listing Options for Sellers, Syndication Policy 8.15) are actively reshaping how listings move between MLS systems and portals — creating more, not fewer, opportunities for data to drift out of sync.
Meet TrueList

One verification layer, built on data you're actually allowed to use

The book walks you through building all of it — from property identity matching to a self-designed confidence score — sequenced so a solo founder can ship a real MVP, not a science project.

Browser Extension

Detects supported listing pages in real time and runs a status, price, and confidence check without the buyer ever leaving the page they're already on.

Confidence Engine

A self-designed, weighted scoring methodology — not a copied formula — that shows its own reasoning: which sources agreed, how recent the data is, and what it couldn't confirm.

Blended Valuation Range

A range built from multiple valuation signals instead of one falsely precise "true value" — because no automated model honestly produces a single certain number.

Licensed, Not Scraped

A real IDX/VOW/RESO-aligned data-access strategy — MLS licensing, brokerage partnerships, and public records — the legally durable way to build a real estate data business.

What's Included

Everything in the 115-page blueprint

Every chapter is TrueList-specific and practical — not generic startup advice. Every unverified number is labeled Industry Estimate, Assumption, or Founder Projection, on purpose.

35 step-by-step chaptersFrom the trust gap and MLS/IDX/VOW landscape through architecture, the confidence engine, legal strategy, pricing, unit economics, and a worked case study.
6 brand-styled charts & diagramsZestimate error comparison, valuation-gap bar chart, product workflow diagram, system architecture diagram, pricing ladder, and case-study growth chart.
A full worked case studyA clearly-labeled illustrative twelve-month subscriber-growth model with a Month-12 MRR breakdown — every number flagged as a Founder Projection.
62-prompt AI Prompt LibraryGrouped across product & engineering, data & legal research, marketing & content, sales & partnerships, and support & operations.
12 ready-to-use templatesCustomer interview script, property verification report, agent and brokerage outreach emails, investor update, weekly KPI report, launch checklist, and more.
Appendices & a 90-day execution planGlossary, tool/platform cheat sheet, FAQ, and a day-by-day Days 1-30 / 31-60 / 61-90 execution plan.
Who This Is For

Built for the founder doing this with limited capital

Before / After

What changes once you have the blueprint

Without It

  • A vague idea that "listing data is unreliable" with no structured plan to build or license a real product
  • No clear path to real estate data — real risk of building on scraped data that gets a product shut down
  • Guessing at a confidence-scoring formula instead of working from a self-designed, defensible methodology
  • No legal/compliance framework for AVM disclosures or MLS licensing terms
  • No content, launch, or brokerage outreach scripts — starting the go-to-market from a blank page

With TrueList

  • A fully scoped product: browser extension, confidence engine, blended valuation range, and a brokerage dashboard
  • A realistic, sequenced legal-first data-access strategy — IDX/VOW/RESO licensing pathways explained plainly
  • A self-designed, weighted confidence-scoring methodology you can rebuild and adapt with your own data
  • A legal, privacy & compliance chapter covering the CFPB's AVM rule and MLS licensing terms
  • A content engine, 30/60/90-day roadmap, and brokerage outreach scripts ready to adapt
Pricing

One payment. Instant access.

35-chapter step-by-step blueprint (115 pages, PDF + DOCX)$129
6 brand-styled charts, diagrams & the full case study$29
62-prompt AI Prompt Library for building & marketing TrueList$29
12 ready-to-use templates & 10 planning worksheets$39
Appendices & the 90-day execution plan$19
Total value$245
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Bonus Resources

Three bonus packs, included at no extra cost

BONUS 1

Worksheets & Checklists

10 named planning worksheets — confidence-score calibration, MVP scoping, a launch checklist, and a blank fillable KPI scorecard.

BONUS 2

Sample Communication Templates

Agent and brokerage outreach emails, a partnership pitch, a customer support response template, and an investor update — ready to adapt.

BONUS 3

Sample Verification Reports

A full worked property-verification-report example and a brokerage-dashboard feature breakdown — the reference to hand a developer on day one.

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FAQ

Questions before you get started

Do I need to know how to code to use this?

You'll get the most out of this book if you're comfortable directing engineering work, even if you're not writing every line yourself. Chapter 26's lean-vs-scalable stack section and the AI Prompt Library are built to help a solo founder move faster with AI-assisted development.

Is this legal or financial advice?

No. Chapter 25's legal and compliance framework explains the regulatory landscape TrueList would operate in — including the CFPB's AVM rule and MLS licensing terms — but it is not a substitute for your own attorney. Every figure that isn't an independently verified, cited fact is explicitly labeled Industry Estimate, Assumption, or Founder Projection.

What format do I get the book in?

You get a 115-page PDF (the primary reading format, with all 6 charts and diagrams embedded) plus a DOCX version, delivered as an instant digital download after checkout.

Can TrueList actually scrape listing sites for data?

No — and the book is explicit about this. Chapter 8 lays out the realistic, legally-cautious data-access strategy (MLS/IDX/VOW licensing, brokerage partnerships, public records) and a clear list of what a real product must never do.

What if it's not for me?

You're covered by a 7-day money-back guarantee. If the blueprint isn't a fit, request a refund within 7 days of purchase.

Does the book guarantee TrueList's confidence scores or valuations are accurate?

No — and neither should any real product. The book is explicit that TrueList's confidence engine shows confidence, not certainty, and that a blended valuation range is used deliberately instead of a single falsely precise number. Regulatory and data landscapes evolve — always verify current requirements with a qualified attorney before relying on any compliance claim in a live product.

7DAY

Try TrueList Risk-Free

If the blueprint isn't the right fit for you, request a full refund within 7 days of purchase — no complicated process, no hard feelings.

Build the Business That Answers "Is This Real?"

115 pages. 6 diagrams. 12 templates. One payment, instant access.

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