Penetration Testing for UK Property and Proptech
CREST-accredited penetration testing for UK estate and letting agents, proptech platforms, property management software and conveyancing technology providers. We test tenant portals, landlord portals, property listing and applicant-record systems, and mortgage application journeys, with UK GDPR Article 32 evidence and PCI DSS coverage for rent, deposit and fee payments. Tenant, landlord and applicant boundaries checked throughout.
- Unlimited retesting
- Unlimited pre-retesting
- No hidden fees
“I would highly recommend EJN Labs to any organisation seeking reliable, detailed, and well-managed penetration testing services, particularly for government or enterprise-level projects.”
“There wasn’t another company we could find that could deliver what we needed in the timeframe we needed. The client loved it, and we got instant ROI from the engagement.”
months is the maximum gap PCI DSS 4.0.1 allows between penetration tests once your platform takes card payments for rent, deposits or fees (Requirement 11.4.2 / 11.4.3).
What Property Buyers, PCI DSS & UK GDPR Expect
UK GDPR. Tenant and landlord portals, referencing checks, right-to-rent documents and mortgage-journey paperwork carry identity documents, income data and payment details. Article 32(1)(d) requires a process for regularly testing, assessing and evaluating the effectiveness of your security measures. It does not name penetration testing as the method, but a test is the most direct evidence that your controls work. UK GDPR Article 32.
PCI DSS. Platforms that take card payments for rent, deposits, holding fees or maintenance charges sit inside PCI DSS 4.0.1. Requirement 11.4.2 and 11.4.3 call for internal and external penetration testing at least once every 12 months and after significant change, and 11.4.1 expects a documented testing methodology. PCI Security Standards Council.
Payment-instruction fraud. Conveyancing completions and rent runs move money between solicitors, agents, landlords and tenants, and a changed bank-details message close to a payment date is a widely reported route into what Action Fraud classes as mandate fraud, also called payment diversion fraud. We test the controls around a changed payee: email and messaging-account compromise, spoofing, and whether your platform verifies a change before funds move. Action Fraud: A-Z of fraud.
Who we test for. Estate and letting agents, proptech platforms, property management software vendors, conveyancing technology providers, mortgage and broker platforms, and housing associations. For solicitor and conveyancing-firm client portals themselves, see our law firm penetration testing page.
SCOPE
What We Test for UK Property & Proptech
Tenant & Landlord Portals
Tenant, landlord and letting-agent logins on one platform. Tenant-to-tenant and landlord-to-landlord data leakage, maintenance and repair requests, and exposure of tenancy agreements, identity documents and EPCs through shared document stores.
Property Listing & Marketplace Platforms
Rental marketplaces and estate agency portals. Listing integrity, agent-versus-owner authority to edit or remove a listing, and applicant-record access across enquiries, viewings and offers.
Mortgage Application Portals
Broker and borrower access on mortgage journeys and adviser platforms. Document integrity for payslips, bank statements and ID, and who can change a selected product or rate mid-application.
Property Management Software
Multi-branch and multi-landlord property management systems. Segregation between agency branches, landlord-visible reporting, contractor and maintenance workflows, and network boundaries across office sites.
Rent, Deposit & Fee Payments
Online rent collection, deposit and holding-fee payment flows, and the APIs behind them. Payment-instruction and bank-detail change controls, and whether a changed payee is flagged before funds move.
Agent & Tenant Mobile Apps
Viewing-booking, digital-key and tenant communication apps. OWASP Mobile Top 10, device storage of identity documents and referencing data, and deep-link handling between the app and web portal.
Phishing & Payment-Fraud Defence
Targeted phishing simulation against conveyancers, agents and finance staff, based on the changed bank-detail lures behind payment diversion fraud at completion and on rent day.
Cloud & Data Hosting
AWS, Azure and GCP configuration for tenancy, referencing and payment data. Encryption at rest, IAM scoping, audit logging and data segregation between agency branches or managed portfolios.
OUR PROCESS
From Scope to Attestation in 4-6 Weeks
Scoping Call
30-minute technical scoping call. Define tenant, landlord and applicant boundaries, payment flows in scope, and rules of engagement. Fixed-price quote within 24 hours.
Active Testing
3-15 days of hands-on testing by CREST-certified pen testers, against staging where possible and with synthetic tenant, landlord and payment data. Daily status updates.
Reporting
Executive summary plus full technical report with CVSS scores, reproduction steps, screenshots, and specific remediation. 60-minute walkthrough call.
Free Retest
After remediation, we retest at no extra charge. Letter of attestation provided for buyer due diligence, PCI DSS evidence or audit.
CREDENTIALS
Verified Accreditations Auditors Accept
Every credential below is independently verifiable. UK procurement teams, FCA supervisors, ISO 27001 / SOC 2 auditors, and cyber insurance underwriters all recognise these standards.
GET YOUR QUOTE
Get a CREST property pen test quote in 24 hours
A fixed-price quote back in one business day, from a named CREST assessor. No sales pipeline, no chasing.
- CREST and IASME accredited. Testing your auditors and clients already recognise.
- Fast-track testing within 24 hours where required. Free retest of every fix included.
- Live findings via your client portal, not a four-week PDF.
- Fixed price from £3,500 for a single-role, single-app scope, agreed up front. Most engagements run £5,000 and up. No day-rate surprises.
Dan WilcocksonFounder, CelloriUnder NDA Further named references available on a scoping call.
- We reply within one business day with a fixed-price quote from a named CREST assessor.
- You approve the scope and we book a start date, usually within 24 hours.
- Live findings land in your client portal as we test, with a free retest of every fix.
Get your fixed pen test quote in 24 hours
Quote request received
We will reply within one business day with your fixed-price quote from a named CREST assessor.
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or book a 20-min scoping call first
We reply within one business day. Your data stays with us. No newsletter signup.
COMPLIANCE READY
Reports Aligned to Every Framework
Findings map to specific control references in each framework, so your audit team submits the report directly without translation work.
UK GDPR
Article 32(1)(d) evidence that you regularly test the effectiveness of your security measures for tenant, landlord and applicant data.
ISO 27001
Annex A 8.8 technical vulnerability management, once you declare that control applicable.
PCI DSS 4.0.1
Requirement 11.4.1-11.4.3 internal and external testing for rent, deposit and fee card-payment environments.
Cyber Essentials Plus
Certified directly by us as an IASME certification body, alongside your test.
NCSC Cloud Security
Buyers assessing a cloud-hosted platform are guided to look for externally audited evidence of regular penetration tests.
Landlord & Investor Due Diligence
An independent report you can attach to landlord, institutional investor and lender security questionnaires.
PRICING
Indicative Engagement Pricing
Fixed-price quotes confirmed during scoping. Free retest, executive summary, walkthrough call, and letter of attestation included.
Depends on service + scope
External / web / API / mobile single-target engagement. CREST-certified delivery. Around 3 to 5 working days from kickoff to report.
Get a fixed quoteDepends on service + scope
Multi-target combined engagement (web + API + external + AD), or single complex target. Typically 7-10 days.
Get a fixed quoteDepends on service + scope
Full-stack engagement (multiple cloud accounts, hybrid AD, complex web + API + mobile). Typically 12-15+ days.
Get a fixed quoteWHY EJN LABS
What You Get From Property & Proptech Penetration Testing
Six concrete differentiators competitors don’t all match.
CREST-Certified Testers, Verifiable
Every test by a CREST-certified pen tester (CRT, CCT APP, CCT INF where applicable). Verify our company status at crest-approved.org.
24-Hour Startup, Where Required
From signed scope to active testing in a single business day for incident response, audit deadlines, or regulator-driven timelines.
Live Findings, Not 4-Week PDFs
Critical issues reported during testing through your client portal. Your team remediates while testing continues.
Audit-Ready Reports
Executive summary plus full technical report with CVSS scores and explicit framework mappings (ISO 27001, SOC 2, PCI DSS, FCA SYSC).
Free Retests, Standard
Verify remediation of every finding before close-out. Letter of attestation for audit submission included. Most competitors charge £1,500-£3,000 per retest.
UK-Based CREST Testers
Every engagement performed by vetted, UK-based CREST-certified testers, matched to your needs, security clearance, and compliance scope.
FAQ
Frequently Asked
What does a property or proptech penetration test actually check?
Whether one tenant, landlord or applicant can see or change another’s data on your platform, whether a listing can be edited by someone without authority over it, and whether a payment instruction can be changed by someone impersonating a party to the transaction. We test through the website, the app, the API and every admin or agent screen, not just the parts a normal user sees.
Do you test tenant and landlord portals separately from the public-facing website?
Yes. Public listing pages, the tenant portal, the landlord portal and any agent or branch-admin console are scoped and tested as separate roles, so we can check what each role can see or do to another tenant’s or landlord’s records.
Can you test our Open Banking or card-payment integration for rent and deposit collection?
Yes. We test the payment integration itself and the payment-instruction change controls around it: who can change the bank account or payee a rent run pays out to, and whether that change is verified before funds move. Where card payments are involved this sits inside PCI DSS scope.
Can you test our lettings platform’s payment integration before we onboard a housing association client?
Yes. Housing association buyers commonly run their own supplier due diligence, and we scope testing to answer the specific questions that come up: resident data segregation, payment-flow integrity and evidence that you test regularly under UK GDPR Article 32.
Do you test housing association and social housing platforms?
Yes. Resident portals, repair-booking systems and contractor apps used by housing associations and registered providers. We test resident privacy and household-record separation, what a contractor account can see beyond its assigned job, and controls around payment and bank-detail changes.
Do you test for conveyancing payment-instruction fraud?
Yes. Changed bank-details fraud close to completion, sometimes called mandate fraud or payment diversion fraud, is a widely reported risk in property transactions. We test email and messaging-account compromise, spoofing, and whether your platform verifies a changed payee before releasing funds. This page covers property and proptech platforms; for solicitor and conveyancing-firm client portals see our law firm penetration testing page.
Which property and proptech organisations do you test for?
Estate and letting agents, proptech platforms, property management software vendors, conveyancing technology providers, mortgage and broker platforms, and housing associations.
What’s in the report?
Executive summary (board-ready), technical report with CVSS 3.1 scores, reproduction steps, screenshots, specific remediation guidance, and a 60-minute walkthrough call. Letter of attestation issued after free retest.
Do you sign NDAs?
Yes. We sign client-supplied NDAs as standard. Engagement data is protected under our ISO 27001 (BSI-audited) information security management system.
How quickly can you start?
From signed scope to active testing in 24 hours where required. Standard pipeline is 3-5 business days from initial scoping call to test start.
Are your testers UK-based and what certifications do they hold?
Every engagement is performed by vetted UK-based CREST-certified testers matched to your engagement based on security clearance, compliance scope, and sector specialism. Testers hold CREST certifications relevant to their discipline (CRT, CCT APP, CCT INF, CCSAM).
20+ CREST-accredited testing services in one place
Web, mobile, API, cloud, AI, infrastructure, red team. Pick the test that fits your environment.
Get my Property pen test scope
A CREST-certified pen tester will contact you within one business day with a fixed price aligned to your tenant, landlord and payment-security needs.
