---
title: "Privacy Policy | DuplexCost"
description: "Examine the privacy policy and data protection practices of DuplexCost. Learn how we collect, store, and share lead data with verified builders."
source: DuplexCost
sourceUrl: https://duplexcost.com/privacy/
lastUpdated: 2026-07-01
citationUrl: https://duplexcost.com/privacy/
---

# Privacy Policy

Examine the privacy policy and data protection practices of DuplexCost. Learn how we collect, store, and share lead data with verified builders.

This Privacy Policy describes how DuplexCost ("we," "our," or "us") collects, uses, and discloses your personal information when you use our platform, interactive cost calculator, and related services.

When you interact with our Duplex Cost and Feasibility Calculator, we collect both static project parameters and personal contact details:

We collect and process your information for the following specific purposes:

We only disclose your personal contact details to third parties under the following conditions:

We utilize local storage keys (such as `dc_consent`) and secure browser cookies to persist your opt-in selections and prevent repeated popups. All database storage is encrypted inside Cloudflare D1 production databases.

## 1. Information We Collect

## 2. How We Use Your Information

## 3. How We Share Your Information

## 4. Cookies and Security

#### Guides

#### Company

## Key Points

- Zoning & Estimator Parameters: Property postcode, suburb, state, estimated land value, lot size, frontage, build configurations, and soil/slope selections.
- Personal Contact Information: Your full name, mobile phone number, and email address, captured during the "Unlock Detailed Feasibility Report" stage.
- To compute and generate your customized turnkey duplex feasibility and ROI report.
- To verify your identity and protect against malicious automated spam submissions. We use Hono-based WhatsApp OTP authentication services via `whatsapp.stayboba.com` to send a one-time passcode to your mobile.
- Explicit Consent Required: If you explicitly opt-in to "Match with Builders", we share your contact details and project specifications with a maximum of three (3) verified builder partners in our CrocLeads supply marketplace.
- Spam Prevention: Technological device markers and IP details are processed securely via Cloudflare Turnstile to validate human identity.
- Cost to Build a Duplex
- CDC Duplex Requirements
- Best Sydney Builders
- Best Melbourne Builders

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*Source: [DuplexCost](https://duplexcost.com/privacy/)*