Memberships & Certifications

View our comprehensive range of company Certifications and Memberships.

We hope to provide peace of mind in that we have the credentials to tackle the range of works we offer.

BSI Certificate of Registration:

Certification to ISO 9001:2015.

Scope of certification: ‘The provision of building, maintenance and refurbishment services.’

Certification body: BSI Management Systems.

Certification reference: FS 590906

Considerate Constructors Scheme Registration:

Company ID. 00919


Investors in People Accreditation:

10 year award certificate recognising ASW’s continued commitment to being an Investors in People company.

Investors in People Accreditation:

A new Framework A new High Standard – Investors in People

The new Standard explores practices and outcomes within an organisation under three performance headings: leading, supporting and improving.

Federation of Master Builders:


Member no. 10541

  Safe Contractor Accreditation:

  Certificate no. UG3813

Safe Contractor PAS91:

  Certificate no. UG3813


Registration no. 117628


Registration no. 35021

PAS2030 Green Deal Installer:

BBA Installer no. 8869

TRUSTMARK Registered:




BBA Installer no. 8869


Green Dragon Level 4:

Serial no. GWW 00500

Gas Safe:

Registration No:564590


Certificate No:618453000

Cyber Essentials:

Certification No: IASME-CE-047410

BM Trada:

Certification No: 864

BM Trada:

Certification No: 1539

BM Trada:

Certification No: 1539

UK modern slavery act compliance and anti-slavery statement central register



Some of Our Accreditations

See all of our accreditations »