TrustMark’s data-led audit and compliance service validates home improvements, promotes quality installation and provides customer protection.
What is the TrustMark verification and assurance service?
The TrustMark Verification and Assurance Service provides a structured quality assurance framework to help businesses, lenders, and local authorities ensure that home retrofit and energy efficiency measures are installed to high standards.
This service offers independent verification that installations meet industry requirements, helping organisations mitigate financial risk and maintain consumer confidence. It ensures that work is performed by competent, accredited installers and that compliance with relevant regulations (e.g. PAS 2035, MCS standards) is documented and assured.
How does the verification and assurance work?
The service operates through a tiered verification model tailored to different levels of oversight. At its core, TrustMark Assure combines a national register of competent tradespeople with a data-driven assurance process that tracks installations. Lenders and local authorities can integrate this service into their customer journey in multiple ways:
- Pre-installation checks – Validation of installer credentials and compliance with relevant certifications before work begins.
- Installation verification – Confirmation that energy efficiency measures have been installed, with supporting evidence such as invoices and photographic records.
- Quality assurance reviews – Additional assessments to verify compliance with industry standards, helping to mitigate risk and ensure compliance with ESG reporting criteria
A key tool supporting this process is the TrustMark Property Checker API. This service enables lenders and local authorities to automate verification and integrate real-time quality assurance into their customer journey. By connecting directly to the TrustMark Data Warehouse, the API allows organisations to retrieve and validate installed measures data, ensuring that upgrades meet the required standards before approving funding or regulatory compliance.
For organisations that prefer lighter touch integration, TrustMark also offers a Property Checker dashboard where non-technical users can access and visualise verification data in a user-friendly way, making it easier to track installations, assess compliance, and review supporting evidence.
By leveraging the API and dashboard, lenders can seamlessly incorporate verification into green finance decision-making, while local authorities and businesses can ensure due diligence in energy efficiency programmes, reducing administrative overhead and enhancing consumer confidence.
What are the benefits of the verification and assurance service?
By integrating the TrustMark Verification and Assurance service, supported by the Property Checker API, into your customer journey you can improve compliance, mitigate risk, and enhance customer confidence by:
- Ensuring independent validation that installations have been completed by verified and accredited tradespeople
- Reducing the administrative burden by accessing real-time verification data
- Strengthening consumer trust through transparency and accountability
- Verifying that funds have been spent on eligible energy efficiency measures
- Tracking and reporting verified installations, demonstrating measurable progress toward net zero goals and ESG targets
This can help streamline compliance, reduce operational costs, and improve customer satisfaction, while also supporting your organisation deliver trusted, high-quality energy efficiency and green finance solutions.
Learn more
Interested in learning more about how your organisation can benefit from our assurance and verification service?