Cleaning accreditations are third-party certifications that de-risk procurement. SafeContractor, CHAS and Constructionline confirm a contractor's health-and-safety and prequalification credentials; the ISO 9001, 14001 and 45001 standards certify quality, environmental and health-and-safety management. Buyers ask for them because they satisfy tender prequalification (PQQ) requirements.
Why do cleaning buyers ask for accreditations?
Accreditations evidence that a contractor manages health and safety, quality, the environment and (for information-security standards) data securely. They de-risk procurement and satisfy the prequalification (PQQ) stage of framework and tender processes — many public bodies and large contractors will not let you tender without the relevant certification in place.
What is SSIP, and how do CHAS and SafeContractor relate to it?
SSIP (Safety Schemes in Procurement) is an umbrella that lets UK health-and-safety assessment schemes recognise each other, reducing duplication — over 89,900 suppliers are registered with an SSIP member scheme. Certification means your health-and-safety processes meet the HSE-backed SSIP Core Criteria. CHAS (a founding member of SSIP, now Veriforce CHAS) and SafeContractor (an Alcumus scheme, the largest SSIP provider to hold UKAS accreditation) are both member schemes.
The main cleaning accreditations at a glance
Different buyers ask for different badges. The table summarises what each one certifies.
What is Constructionline and its tiers?
Constructionline is a UK supplier prequalification register used by buyers to check contractors before awarding work. Its tiers rise from Associate (free) through Bronze and Silver (SSIP core criteria) to Gold — the most popular, aligned to the Common Assessment Standard and assessing environmental, quality, equal-opportunities, Modern Slavery Act and anti-bribery controls — and Platinum, which adds an on-site audit.
A note on honesty in accreditations
Accreditations should only ever be claimed once genuinely held. OptusGlean UK lists its current, verified certifications on the accreditations page, and shows applications in progress as exactly that — "registration in progress" — rather than implying a badge we do not yet hold. When you shortlist any cleaning company, ask to see the certificate, not just the logo.