Custom Consent Management Plugin

Built a customizable, legally compliant consent management system with cross-domain support, replacing a paid vendor solution and implementing Google consent mode v2.

  • Role: Frontend | WordPress Developer | Digital Analyst
  • Type: Compliance | Tracking Infrastructure
  • Impact: ~$8K/year saved | Compliance risk removed | Unified GTM consent
sec Consent Management Plugin Custom, legally compliant architecture ENGINEERING & INTEGRATION GTM Consent Cross-Domain Customizable BUSINESS IMPACT & RISK ~$8k/Yr Saved Legally Compliant Tracking Flex Mitigated Legal Risk ยท Eliminated Vendor Dependencies PRIVACY & COMPLIANCE ARCHITECTURE
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The Context

Marketing sites lacked a compliant consent management solution, exposing the company to legal consent risks. The available vendor alternative cost approximately $8K/year and limited customization, analytics flexibility, and cookie control.

The alternative vendor also blocked Google Tag Manager on page load instead of setting it necessary. This prevented any tracking scripts from running and allowing Google Tag Manager to filter tags based off consent.

Blocking these tags on page load significantly impacted tracking and analytics for all campaign data.

The Challenge

The existing setup created several constraints:

  • No consistent consent handling across marketing properties
  • Legal/compliance exposure due to inconsistent tracking behavior
  • Vendor solution lacked customization and GTM integration flexibility
  • No cross-domain persistence of consent state

The Approach

Consent System Architecture

Extended Silktide’s consent script into a reusable WordPress plugin, enabling a maintainable implementation across multiple marketing sites. It also was easy to configure in Google Tag Manager for use within landing pages outside of WordPress.

First-Party Consent Storage

Refactored consent logic to store user preferences in first-party cookies, ensuring persistence and compatibility with analytics and tracking systems. Storing first party vs third party also made the consent plugin work better with data privacy laws.

GTM Consent Mode Integration

Integrated consent state with Google Consent Mode V2 inside GTM, enabling consent-aware tracking behavior across marketing tags.

Cross-Domain Consent Support

Implemented cross-domain cookie handling to ensure consistent consent behavior across landing pages and related marketing domains.

Administrative Configuration System

Built admin-level controls for banner styling, language configuration, and placement customization, enabling non-technical teams to manage consent UI behavior.

Future-Ready Tracking Architecture

Structured the system to support future server-side tracking initiatives, ensuring long-term scalability beyond client-side consent management.

The Outcomes

Eliminated compliance risk across marketing properties
Saved ~$8,000 annually in vendor costs
Enabled Google Tag Manager Consent Mode V2 integration
Standardized consent implementation across all domains

The Reflection

This project reinforced the importance of treating consent systems as infrastructure rather than UI components, particularly when they directly impact analytics accuracy, compliance posture, and cross-domain tracking consistency.
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