CHAS — which stands for Contractors Health and Safety Assessment Scheme — is one of the most widely requested prequalification requirements in UK construction. Whether a local authority, housing association, or principal contractor has asked you to hold it, or you are proactively building your accreditation portfolio, this guide walks you through the entire process — from understanding what CHAS actually assesses to submitting an application that passes first time.

It is widely reported in the industry that the majority of first-time CHAS applicants are referred back for additional information or corrections. The guidance below is designed to help you pass first time.

What Is CHAS?

CHAS is a health and safety assessment scheme that evaluates whether your business has adequate health and safety management arrangements in place. Originally established by a consortium of local authorities, it has grown into one of the UK's most recognised contractor assessment schemes, used across both public and private sectors.

CHAS is a member of SSIP (Safety Schemes in Procurement), which means a CHAS assessment is recognised by other SSIP member schemes through mutual recognition — reducing the need for duplicate assessments.

For a broader overview of how CHAS fits into the wider prequalification system, see our Complete Guide to Construction Supplier Prequalification in the UK.

CHAS Standard vs CHAS Premium Plus

CHAS offers two main tiers of assessment. Understanding the difference is important because it affects both cost and the scope of what you need to prepare.

CHAS Standard

The core health and safety assessment. This evaluates your health and safety policy, risk assessments, safe systems of work, training arrangements, incident reporting, and insurance. For many SME contractors, this is the starting point and satisfies the requirements of a large number of clients.

CHAS Premium Plus

An extended assessment that goes beyond health and safety to cover environmental management, quality management, financial standing, anti-bribery and corruption, modern slavery, and equal opportunities. Premium Plus is increasingly requested by larger clients and aligns more closely with what schemes like Constructionline Gold assess.

Which should you choose? If your clients only ask for CHAS, Standard is sufficient. If you are tendering for larger contracts or working with clients who have broader compliance requirements, Premium Plus provides more comprehensive coverage and may save you pursuing additional assessments separately.

Documentation You Need Before Applying

The single biggest reason applications fail is incomplete or inadequate documentation. Before you start the application, gather and review every item on this list.

1. Health and Safety Policy

Your policy must be signed by a director or owner, dated within the last 12 months, and specific to your business activities. A generic template downloaded from the internet will almost certainly be flagged. The policy should include a general statement of intent, organisation and responsibilities (named individuals), and arrangements for implementing the policy in practice.

2. Risk Assessments

Activity-specific risk assessments for the work your business carries out. These must demonstrate that you have identified the significant hazards associated with your operations and put proportionate controls in place. Assessors look for evidence that risk assessments are living documents — reviewed regularly and updated when circumstances change.

3. Method Statements and RAMS

Risk Assessment Method Statements (RAMS) for high-risk activities. These should show a clear, step-by-step approach to carrying out work safely, referencing the relevant risk assessments, required PPE, competence requirements, and emergency procedures.

4. Insurance Certificates

Current certificates for:

Employers' liability insurance — minimum £5 million (many principal contractors require £10 million)
Public liability insurance — typically £5 million minimum, though requirements vary by client
Professional indemnity insurance — if you provide design or consultancy services

Certificates must be current and cover the period of assessment. Expired certificates are one of the most common and most avoidable reasons for referral.

5. Training Records

Evidence that your workforce holds appropriate competence qualifications:

CSCS cards for operatives
SMSTS (Site Management Safety Training Scheme) for site managers
SSSTS (Site Supervisors Safety Training Scheme) for supervisors
Trade-specific qualifications (e.g., IPAF, PASMA, asbestos awareness)
First aid at work certificates
Evidence of ongoing training and toolbox talks

6. Evidence of Competent Health and Safety Advice

Under the Management of Health and Safety at Work Regulations 1999, you must have access to competent health and safety advice. This could be an in-house competent person (with appropriate qualifications such as NEBOSH) or a retained external health and safety consultant. You will need to provide evidence of this arrangement.

7. Environmental Policy (Premium Plus)

A written environmental policy covering waste management, pollution prevention, energy use, and environmental awareness training. For SMEs, this does not need to be ISO 14001 certified, but it must demonstrate genuine engagement with environmental responsibilities relevant to your operations.

8. Additional Policies (Premium Plus)

For Premium Plus, you will also need: equal opportunities policy, modern slavery statement, anti-bribery and corruption policy, and quality management procedures.

Use our Health & Safety Documentation Checklist to systematically check every requirement before you start the application.

Step-by-Step Application Process

Step 1: Audit Your Current Documentation

Before you spend anything on application fees, conduct an honest internal audit. Review each document against the requirements listed above. Check dates, signatures, specificity, and completeness. This is where most of the real work happens — the application itself is simple once your documentation is sound.

Step 2: Fill the Gaps

Address every issue identified in your audit. Rewrite generic policies to reflect your actual operations. Update risk assessments. Renew expired insurance. Ensure training records are complete and current. If you do not have access to competent health and safety advice, arrange this before applying.

Step 3: Choose Your Tier

Decide whether CHAS Standard or Premium Plus is appropriate for your business needs and client requirements. If in doubt, start with Standard — you can upgrade later.

Step 4: Register and Create Your Account

Visit the CHAS website and create an account. You will need to provide basic company information including registered company name, company number, business activities (using SIC codes and work category descriptions), number of employees, and contact details for the person managing the application.

Step 5: Complete the Online Application

The application is completed through the CHAS online portal. You will answer a series of questions about your health and safety management arrangements and upload supporting documentation. Answer honestly and specifically — vague or generic responses are a common trigger for referral.

Step 6: Upload Supporting Documents

Upload all the documentation outlined above. Ensure files are clearly named (e.g., "HS_Policy_2026_Signed.pdf" rather than "Document1.pdf"), legible, and complete. Missing pages or illegible scans cause delays.

Step 7: Pay the Application Fee

Fees vary by company size and tier. Check the current fee schedule on the CHAS website before applying — fees are reviewed regularly and are subject to change.

Step 8: Assessment Review

A CHAS assessor will review your application and documentation. This typically takes between one and four weeks, depending on the volume of applications and the completeness of your submission.

Step 9: Respond to Any Queries

If the assessor needs additional information or clarification, you will receive a notification through the portal. Respond promptly and thoroughly — incomplete responses to queries lead to further rounds of referral and delay.

Step 10: Receive Your Certificate

Once the assessor is satisfied that your arrangements meet the required standard, you will receive your CHAS certificate, valid for 12 months. You will be listed on the CHAS database, visible to buyers searching for prequalified contractors.

Common Reasons Applications Fail

Understanding why applications fail helps you avoid the same pitfalls. The most frequently reported issues include:

Generic or Template Policies

Assessors can spot a downloaded template immediately. Your health and safety policy must reflect your business — the specific activities you carry out, the hazards your workforce encounters, and the control measures you actually implement. A bricklaying contractor's policy should read very differently from an electrical contractor's.

Outdated Documentation

Policies not reviewed within 12 months, expired insurance certificates, lapsed training qualifications. If a document has a date on it, the assessor will check it. Build a rolling review schedule so nothing expires unnoticed.

Incomplete Risk Assessments

Risk assessments that do not cover your core activities, or that identify hazards without specifying adequate control measures. Assessors are looking for evidence that you genuinely engage with the risk assessment process, not that you have ticked a box.

No Evidence of Competent Advice

Failing to demonstrate access to competent health and safety assistance is a fundamental compliance gap. This is a legal requirement, and assessors will look for evidence of either an in-house competent person or a retained external adviser.

Poor Presentation and Organisation

Illegible documents, unclear file names, missing pages, and disorganised submissions all slow the process and increase the likelihood of referral. Treat the application as you would a tender submission — clear, professional, and complete.

Mismatched Information

Inconsistencies between your application answers and your uploaded documents. If your policy says you employ 30 people but your application says 15, the assessor will query it. Ensure everything aligns.

How Long Does CHAS Last?

CHAS accreditation is valid for 12 months from the date of issue. You will need to renew annually, which involves a reassessment of your documentation and management arrangements. Many contractors find the renewal process smoother than the initial application — provided they maintain their systems throughout the year rather than scrambling to update everything at renewal time.

Preparing for Success

The contractors who pass first time share common traits: they prepare thoroughly before applying, they treat their health and safety management systems as operational tools rather than paperwork exercises, and they present their documentation clearly and professionally.

If you are unsure whether your business is ready to apply, start with our Construction Accreditation Readiness Scorer for a quick assessment, then use the Health & Safety Documentation Checklist to identify specific gaps. Work through each area systematically, and only submit your application once you are confident that every requirement is covered.

The investment of time upfront pays for itself — not just in avoiding failed applications and wasted fees, but in building health and safety systems that genuinely protect your workforce and your business.

Sources and References

Health and Safety at Work etc. Act 1974 — legislation.gov.uk
Management of Health and Safety at Work Regulations 1999, Regulation 7 (Competent Assistance) — legislation.gov.uk
Employers' Liability (Compulsory Insurance) Act 1969 — legislation.gov.uk
SSIP (Safety Schemes in Procurement) — ssip.org.uk

Disclaimer: This guide is based on publicly available information and common industry practice. TenderReady is not affiliated with, endorsed by, or acting on behalf of CHAS or any other named accreditation body. Application processes, fees, and assessment criteria are subject to change — always verify current details with CHAS directly.