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London's trusted window installation service — call us for a free site survey.

Legal

Privacy Policy

How Golden Ratio Joinery Ltd collects, uses, and protects your personal data in accordance with UK GDPR.

Privacy Policy

This policy explains what personal data we collect, why we collect it, and your rights under UK GDPR.

Last updated: 17 June 2026

1. Who We Are

Golden Ratio Joinery Ltd (“we”, “us”, “our”) is a specialist joinery and sash window company trading as Golden Ratio Sash Windows & Doors, serving customers across London and the surrounding area.

2. What Information We Collect

When you interact with us — through our website, phone, or email — we may collect:

  • Contact details: name, email address, phone number, and property address (for quoting purposes)
  • Enquiry details: the nature of your window or door project, property type, and any photos you share with us
  • Website usage data: pages visited, time on site, and device type (collected anonymously via analytics)
  • Communication records: emails, messages, and call notes between you and our team

3. How We Use Your Information

We use your information to:

  • Respond to your enquiry and provide a quote
  • Arrange and carry out survey visits and installation work
  • Send you updates about your project
  • Improve our website and services
  • Comply with our legal and accounting obligations

We do not use your data for unsolicited marketing without your explicit consent.

4. Legal Basis for Processing

Under UK GDPR, we process your data on the following grounds:

  • Contract: to fulfil a quote request or carry out work you’ve commissioned
  • Legitimate interests: to manage our business operations and respond to enquiries
  • Legal obligation: to meet HMRC and other statutory requirements
  • Consent: where you have opted in to receive marketing communications

5. How We Share Your Information

We do not sell your personal data. We may share it only with:

  • Trusted subcontractors who assist with project delivery, bound by confidentiality agreements
  • Professional advisors (e.g. accountants or solicitors) where required
  • Google Ads and Analytics for advertising and website performance (see Section 7)
  • Regulatory bodies if required by law

6. How Long We Keep Your Data

Data type Retention period
Enquiries that did not proceed 12 months
Customer project records 7 years (legal/tax requirement)
Website analytics 26 months (Google default)
Marketing consent records Until you withdraw consent

7. Cookies & Third-Party Services

Our website uses cookies to help us understand how visitors use the site. This includes:

  • Google Analytics — anonymous traffic data (pages, sessions, device type)
  • Google Ads — to measure the performance of our advertising campaigns

You can control cookie preferences via your browser settings. By continuing to use our site, you consent to non-essential cookies unless you opt out.

8. Your Rights

Under UK GDPR, you have the right to:

  • Access the personal data we hold about you
  • Correct inaccurate or incomplete data
  • Delete your data (the “right to be forgotten”), where applicable
  • Restrict or object to how we process your data
  • Data portability — receive your data in a machine-readable format
  • Withdraw consent at any time, where consent is the basis for processing

To exercise any of these rights, contact us at info@goldenratiowindows.co.uk. We will respond within 30 days.

9. Data Security

We take reasonable technical and organisational measures to protect your data, including secure email, limited staff access, and encrypted cloud storage. No method of transmission over the internet is 100% secure, but we take the protection of your information seriously.

10. Contact & Complaints

If you have any questions about this policy or how we handle your data, please contact:

If you are unhappy with how we’ve handled your data, you have the right to lodge a complaint with the Information Commissioner’s Office (ICO):

11. Changes to This Policy

We may update this policy from time to time. The “last updated” date at the top of this page will always reflect the most recent version.

Have a question about your data?

Get in touch and we’ll be happy to help.

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