Which Construction Accreditation Do You Actually Need?

You have been told you need accreditation. Maybe a principal contractor flagged it during supply chain onboarding. Maybe you failed a PQQ because you did not hold the right certificate. Either way, you are now looking at CHAS, Constructionline, SafeContractor, SMAS, Acclaim, and half a dozen others — and wondering which ones to spend money on.

This guide gives you a decision framework. Not a sales pitch for any particular scheme, but a structured way to work out which accreditations your business actually needs based on who you work for, what sector you operate in, and where you want to be in two to three years.

Step 1: Start With Your Clients

Forget the scheme websites for a moment. Open your tender documents.

The single most reliable way to choose your first accreditation is to check what your current and target clients explicitly require. Pull out the last five prequalification questionnaires you completed (or failed to complete). Look at the supply chain requirements on the portals of contractors you want to work with.

What you are looking for:

Named scheme requirements. If a PQQ says "Constructionline Gold required," that is your answer. No amount of SSIP mutual recognition will put you on the Constructionline register — you need Constructionline specifically. See our Constructionline Gold guide for what is involved.
SSIP-level requirements. If the document says "current SSIP assessment" or "health and safety accreditation from a recognised SSIP member scheme," you have more flexibility. Any SSIP member scheme will satisfy this requirement. See our SSIP overview for the full list of member schemes.
Extended compliance requirements. Some PQQs ask for evidence of environmental management, quality management, financial standing, and equality policies alongside health and safety. If so, you need a scheme tier that covers those areas — such as CHAS Premium Plus or Constructionline Gold — or separate evidence for each.

If you do not have recent tender documents to hand, contact your main clients' procurement teams and ask directly. A five-minute phone call can save months of chasing the wrong certificate.

For a broader overview of how prequalification works across UK construction, see our Complete Guide to Construction Supplier Prequalification.

Step 2: Match Your Sector

Different parts of the construction industry lean towards different schemes. These are not hard rules — there is significant overlap — but the patterns are consistent enough to guide your decision.

Local Authority and Public Sector Work

CHAS has the deepest roots here. It was founded in 1997 by a consortium of local authorities specifically to standardise health and safety vetting of contractors. If you work for councils, housing associations, NHS trusts, or schools, CHAS is very likely to appear in your PQQs. Our guide to getting CHAS accreditation covers the application process from start to finish.

Constructionline is also strong in public-sector procurement, particularly for larger frameworks and central government work. Public-sector buyers use Constructionline as a searchable register of prequalified suppliers.

Tier 1 Contractor Supply Chains

If you are working (or want to work) as a subcontractor to Balfour Beatty, Kier, Morgan Sindall, Willmott Dixon, or similar principal contractors, Constructionline Gold is the most commonly required accreditation. Many Tier 1 contractors use Constructionline as their primary supply chain management platform and will not consider suppliers who are not registered at Gold level.

Facilities Management and Maintenance

SafeContractor has the strongest recognition in FM, commercial maintenance, retail fit-out, and corporate services. If your clients are property managers, building owners, or retail chains, this is likely the scheme they specify.

Scotland

SMAS (Safety Management Advisory Services) has particularly strong recognition in Scotland and parts of northern England. If a significant portion of your work is north of the border, SMAS Worksafe is worth considering either as a primary or supplementary accreditation. See our guide to SMAS, Acclaim, and other SSIP schemes for more detail.

Mixed or Cross-Sector

If your work spans multiple sectors, prioritise based on volume. Where does the majority of your revenue come from? Start there.

Step 3: Consider Your Budget

Accreditation is an annual cost. Fees vary by scheme, tier, and company size — and they add up if you hold multiple schemes.

Cheapest entry point: PQS (Pre-Qualification Safety) starts at around £99+VAT for sole traders and micro businesses, though it is less widely recognised than the major schemes. Among the mainstream options, CHAS Standard and SafeContractor Standard represent the most accessible starting points for SMEs.

Most commonly requested: CHAS Standard remains the single most frequently named scheme in UK construction tender documents, particularly at the smaller end of the supply chain.

SSIP mutual recognition gives you some coverage across other SSIP member schemes without paying for each one separately — but it has limitations (covered in our SSIP overview). It covers the core health and safety assessment only, not extended modules, and does not add you to another scheme's database.

For a full breakdown of what each scheme costs at each tier, see our Construction Accreditation Costs guide.

Practical budgeting rule: Only pay for schemes that directly open up work. If you cannot point to a specific client or tender that requires a particular accreditation, do not buy it.

Step 4: Think About Growth

Where do you want your business in two to three years? Your accreditation strategy should align with your business development plan, not just your current client list.

If you are targeting Tier 1 supply chains, invest in Constructionline Gold now, even if your current work does not require it. The onboarding process takes time, and being on the register means buyers can find you when opportunities arise.

If you are building a track record, CHAS Standard is the most accessible starting point. It is widely recognised, relatively quick to achieve, and through SSIP mutual recognition provides a baseline of visibility across the scheme network.

If you are scaling into larger public-sector frameworks, you will increasingly encounter requirements aligned to the Common Assessment Standard (CAS). CHAS Premium Plus and Constructionline Gold both assess against CAS criteria. Getting ahead of this now avoids a scramble when a framework opportunity appears.

If you are diversifying into FM or maintenance, add SafeContractor to your portfolio when those clients start appearing in your pipeline.

Step 5: How Many Do You Need?

Most established construction SMEs hold two or three accreditations. But "most" does not mean "you should."

The right number is driven by a simple test: does each scheme you hold open up enough work to justify the annual fee and administrative effort of maintaining it?

The Case for Multiple Schemes

Different clients require different schemes. If you work across local authority, Tier 1, and FM sectors, you may genuinely need CHAS, Constructionline, and SafeContractor.
Some schemes serve as registers (Constructionline), not just assessments. Being on the register has value beyond the assessment itself — buyers can find and shortlist you.
Extended tiers (Premium Plus, Gold) cover environmental, quality, and financial compliance in a single assessment, which can reduce the total cost of demonstrating compliance across multiple areas.

The Case Against Collecting Certificates

Annual fees for three schemes at higher tiers can easily exceed £2,000–£3,000 per year for a small business.
Each scheme requires annual renewal, documentation review, and administrative time. That is time not spent on site or winning work.
SSIP mutual recognition means holding one scheme gives you partial coverage across others. If a client says "SSIP accreditation required" rather than naming a specific scheme, one is enough.

Do not collect certificates for the sake of it. Every pound spent on accreditation fees should be traceable to a commercial opportunity.

Decision Summary Table

Your situation	Recommended starting point	Consider adding
Local authority / housing association work	CHAS Standard	Constructionline Silver if targeting larger frameworks
Tier 1 contractor supply chain	Constructionline Gold	CHAS Standard for broader public-sector coverage
FM / maintenance / commercial fit-out	SafeContractor	CHAS Standard for construction-specific clients
Scotland / northern England	SMAS Worksafe	CHAS or Constructionline for UK-wide coverage
Mixed sectors	Whichever scheme your largest client requires	Second scheme based on growth pipeline
Just starting out, limited budget	CHAS Standard	Upgrade to Premium Plus or add a second scheme as revenue grows
Public sector frameworks (CAS-level)	CHAS Premium Plus or Constructionline Gold	Both, if framework requirements specify both

For a detailed comparison of CHAS, Constructionline, and SafeContractor, including assessment scope, pricing, and sector strength, see our head-to-head comparison guide.

Your Action Plan

This week: Pull out your last five PQQs and tender documents. List every accreditation explicitly named or referenced. Tally which schemes appear most often.
Next week: Check two or three target clients' supply chain portals. What do they require for approved supplier status? Add these to your list.
Decide: Based on frequency, pick your first (or next) scheme. Use the table above to guide your choice.
Assess your readiness: Before spending anything on application fees, run through our Construction Accreditation Readiness Scorer to identify documentation gaps. The most common reason for failed applications is incomplete or generic documentation — fixing that before you apply saves time and money.
Apply: Once your documentation is sound, apply for your chosen scheme. Budget four to six weeks for the full process from application to certificate.
Review annually: At each renewal, reassess whether each scheme you hold is still commercially justified. Drop any that are not opening up work. Add new ones if your client base has shifted.

The goal is not to hold every accreditation available. The goal is to hold the right ones — the ones that get you through the door for the work you want to win.

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, Constructionline, SafeContractor, SMAS, SSIP, or any other named accreditation body or scheme. Assessment criteria, pricing, and processes are subject to change — always verify current details with the relevant scheme directly.