Standards & compliance
Our accreditations demonstrate H.W. Wilson’s commitment to quality management, environmental responsibility, health and safety, technical competence and responsible construction.
Certificates and supporting documents can be viewed or downloaded below. We regularly review and renew our memberships to ensure that our systems continue to meet recognised industry standards.
ISO 9001
Quality Management
ISO 14001
Environmental Management
CHAS Standard
Health & Safety Compliance
Constructionline
Verified Supplier
Gas Safe
Registered Business
APHC
Plumbing & Heating
Professional memberships
Our specialist memberships support the technical standards, responsible practices and independently assessed systems applied throughout our work.
National Federation of Builders
Industry Membership
SafeContractor
Health & Safety Assessment
SSIP Acclaim
Safety Schemes in Procurement
BM TRADA
Fire Door Installation
BWF
Fire Door Alliance
Considerate Constructors
Responsible Construction
Document library
View our current company certificates, registrations and membership documents.
Documents open in a new browser tab. Expiry dates shown are based on the current certificates supplied to the website.
ISO 9001 CertificateQuality Management System
Expires 21 February 2029 ↓
ISO 14001 CertificateEnvironmental Management System
Expires 21 February 2029 ↓
CHAS Standard CertificateHealth and Safety Compliance
Expires 20 December 2026 ↓
Constructionline CertificateSupplier Registration
Expires 13 June 2026 ↓
Gas Safe RegistrationRegistered Gas Business
Expires 31 March 2027 ↓
APHC Water Regulations CertificatePlumbing and Heating Compliance
Expires 31 January 2027 ↓
BM TRADA RegistrationThird-Party Certification
Expires 8 January 2029 ↓
BM TRADA Fire Door InstallationCertified Installation Scheme
Expires 27 November 2028 ↓
BWF CertificateFire Door Alliance Membership
Expires 31 December 2026 ↓
National Federation of BuildersMembership Certificate
Expires 31 December 2026 ↓
SafeContractor CertificateContractor Accreditation
Expires 13 June 2026 ↓
SSIP Acclaim CertificateSafety Schemes in Procurement
Expires 23 June 2026 ↓
Considerate Constructors CertificateCertificate of Performance
Expires 22 October 2026 ↓
Waste Carrier LicenceEnvironment Agency Registration
Expires 30 March 2028 ↓
Need something else?
Contact us if you require a current policy, insurance document, tender submission certificate or additional compliance information.
Request a document