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Security report for persimmonhomes.com

Persimmon Homes · Real Estate · United Kingdom

Low risk. 1 critical or high finding in SSL/TLS.

Security score

81/100

Risk levelLow

0–100, higher is better. How it is calculated

Persimmon Homes is a leading UK home builder established in 1972, operating nationwide with a strong market presence and recognized 5 Star builder status. The company offers a wide range of new homes and supportive buying schemes targeting first-time buyers and families. Their website reflects a mature digital infrastructure using Umbraco CMS, integrated analytics, and marketing tools, with a focus on user experience and accessibility. Security posture is solid with HTTPS and cookie consent mechanisms, though some security headers and incident response disclosures could be improved. The absence of WHOIS data is a notable concern but does not detract from the overall legitimacy indicated by the website content and branding. Strategic recommendations include enhancing security headers, publishing security policies, and improving domain transparency.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 100 · Low
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

1 finding rated critical or high. Fix these first.

  1. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

Need hands-on remediation? Email guard@offseq.com

Keep watching persimmonhomes.com

This scan found 18 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

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  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
74
Security headers
75
Email security
75
DNS health
80
Network security
100
GDPR outside view
83
Average
81

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Persimmon Homes holds a strong position in the UK real estate market as one of the largest home builders. Their business model focuses on new home sales supported by various mortgage and buying assistance schemes. The company actively engages with communities through charitable programs and sports partnerships, enhancing brand reputation. Their digital presence is well integrated with social media and marketing platforms, supporting customer engagement and lead generation. The lack of visible direct contact emails or phone numbers on the homepage suggests a preference for contact via forms or dedicated pages. Overall, the company demonstrates a robust operational and marketing strategy aligned with enterprise-level real estate development.

Security posture

The website employs HTTPS with a good SSL configuration and uses cookie consent management compliant with GDPR. Security best practices include secure forms and no visible exposure of sensitive data. However, the site lacks several important HTTP security headers such as Content-Security-Policy and X-Frame-Options, which could mitigate risks like clickjacking and content injection. There is no public security policy or incident response information, which limits transparency for security incidents. No vulnerabilities or outdated libraries were detected in the provided content. The missing WHOIS data reduces domain trustworthiness and should be addressed to improve overall security posture.

Recommendations

  1. Implement and enforce additional HTTP security headers including Content-Security-Policy, X-Content-Type-Options, and X-Frame-Options.
  2. Publish a public security policy and incident response plan to enhance transparency and preparedness.
  3. Investigate and resolve the missing WHOIS data to improve domain registration transparency and trust.
  4. Consider adding a security.txt file to facilitate vulnerability disclosures and improve security communication.
  5. Enhance contact information visibility for security and privacy inquiries to build user trust.

Contact details published on the site

Addresses
Legal name
Persimmon plc
Registration number
1818486
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Persimmon Homes
Description
Located nationwide, Persimmon Homes is one of the UK's largest home builders offering new flats to family homes designed with customers in mind.
Key services
New home sales, Home buying schemes, Community support programs
Content quality
excellent
Branding
consistent

Technology

Stack
Umbraco CMS, Google Analytics, FontAwesome, LiveChat, Cookiebot, Bing Ads, Facebook SDK, Curator.io
Frameworks
Umbraco
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Cookie consent banner with granular controls
  • No exposed sensitive data in HTML
  • Use of security storage in consent settings

Analytics and tracking

Services
Google Analytics, Bing Ads
Tracking level
moderate
Privacy practices
good

Advertising

Ad networks
Bing Ads, Adalyser
Tracking pixels
Facebook Pixel, Bing Ads
Marketing tools
LiveChat, Cookiebot
Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is professionally designed and well structured
  2. Strong branding and consistent messaging
  3. Comprehensive privacy and cookie policies with consent management
  4. Use of multiple analytics and marketing tools
  5. No visible security vulnerabilities or exposed sensitive data
  6. WHOIS data unavailable which is a concern for domain transparency
  7. No direct company contact emails or phone numbers found in the HTML content
  8. Social media presence is strong and consistent with brand
  9. No security.txt or explicit incident response information found
Technical notes

Notes

The website is built on the Umbraco CMS platform, leveraging modern JavaScript libraries and frameworks such as FontAwesome for icons, Google Analytics for traffic analysis, and LiveChat for customer support. The site uses asynchronous loading for performance optimization and includes cookie consent management via Cookiebot. The presence of multiple marketing and tracking scripts indicates a mature digital marketing strategy. Performance is moderate with preloading of critical CSS and JS assets. Mobile optimization and accessibility are well addressed with responsive design and ARIA labels. No major technical debt or deprecated technologies were identified in the HTML content.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

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