The Quick Answer
Constructionline accreditation is the UK’s largest government-backed register of pre-qualified contractors and consultants, used by central government, local authorities and most tier-1 main contractors to check a supplier’s health and safety, insurance and financial standing before letting them tender or work on site. It runs across four tiers, Bronze, Silver, Gold and Platinum, priced against your annual turnover band rather than headcount, with Bronze starting from around £219 + VAT a year. Gold is the tier most main contractors now actually require, because it is the one that adds the Common Assessment Standard. HSEQ Support’s chartered consultants help businesses across Kent and the South East work out which tier they need and get through the application first time.
If a main contractor or a public sector buyer has told you that you need to be “on Constructionline” before you can tender, you are in good company. It is the largest supplier database of its kind in the UK, and it is also one of the most confusing to navigate from the outside, four tiers, fifteen turnover bands, and a Common Assessment Standard that only some of those tiers actually include.
This guide walks through what Constructionline accreditation actually is, what each tier costs and covers, how the application process works, and how long it realistically takes, so you know exactly what you are signing up for before you start.
What Is Constructionline Accreditation?
Constructionline is the UK’s largest register of pre-qualified contractors and consultants, carrying government backing that gives it particular weight with public sector and construction buyers. Rather than every buyer running its own supplier assessment from scratch, Constructionline verifies your insurance, health and safety, financial standing and (at higher tiers) wider compliance once, and then makes that verified profile searchable to its member buyers.
Central government departments, local authorities, housing associations and the large majority of tier-1 main contractors either use Constructionline directly or require suppliers to hold it before they will add them to a tender list. If you are chasing public sector building work, infrastructure contracts or work with a large main contractor, Constructionline is very often the scheme you get asked for by name, in the same way SafeContractor gets requested by retail and facilities management buyers, and CHAS by councils and housing associations.
Constructionline also sits alongside supplier assurance schemes used more in the infrastructure and utilities sectors, such as Achilles accreditation, which many businesses hold in parallel once they are tendering for larger frameworks.
Who Needs Constructionline Accreditation?
You are most likely to be asked for Constructionline if you work with, or want to work with:
- Central government departments and agencies
- Local authorities and housing associations
- Tier-1 main contractors on construction and infrastructure projects
- Housing developers and property management firms running supplier frameworks
- NHS trusts and other public bodies procuring construction or facilities work
Smaller subcontractors sometimes assume Constructionline is only for large firms. In practice, plenty of sole traders and small trades businesses hold Bronze simply because a local authority framework or a main contractor’s supply chain portal requires it before you can even submit a quote.
How Much Does Constructionline Cost?
Constructionline prices differently to SafeContractor and CHAS. Instead of pricing by employee headcount, it prices by your annual turnover band, of which there are fifteen, ranging from under £75,000 up to over £50 million, combined with your chosen tier (Bronze, Silver, Gold or Platinum).
Bronze starts from around £219 + VAT a year for the smallest turnover band. Silver, Gold and Platinum are quoted against your specific turnover band rather than published as a single headline price, so the only reliable way to get an exact figure is a quote from Constructionline itself once you know which tier you need. As a rule of thumb, each tier up adds a meaningful jump in annual cost because it adds a genuinely deeper level of assessment, not just a badge.
There is also a one-off joining fee for new members, calculated from your turnover band, which applies in your first year only. From year two onwards you pay the annual membership fee alone, with no repeat joining fee, so budget for a higher first-year cost than your ongoing renewal.
One thing that catches businesses out: SSIP recognition through Once For All Health & Safety is bundled into every paid Constructionline tier at no extra cost. If you are already paying for Constructionline, you do not need to pay separately for a standalone SSIP assessment on top.
Bronze vs Silver vs Gold vs Platinum: What’s the Difference?
| Tier | Price band | What’s included | Common Assessment Standard? | Who typically needs it |
|---|---|---|---|---|
| Bronze | From around £219 + VAT a year (lowest turnover band) | Insurance verification, Once For All Health & Safety SSIP recognition, searchable supplier profile, Marketplace access | No | Smaller subcontractors meeting a basic pre-qualification requirement |
| Silver | Quoted by turnover band | Everything in Bronze, plus Corporate and Professional Standing checks: financial standing, anti-bribery, modern slavery and environmental policy evidence | No | Businesses whose buyers want financial and governance assurance, not just health and safety |
| Gold | Quoted by turnover band | Everything in Silver, plus the Common Assessment Standard via a desktop review, and Building Safety Act assessment questions | Yes (desktop) | Most tier-1 contractors and public sector frameworks, now the tier most buyers actually specify |
| Platinum | Quoted by turnover band | Everything in Gold, plus a site-based, physically verified Common Assessment Standard audit | Yes (site-based) | Higher-risk or higher-value contracts where a client specifically requires on-site verification |
Prices scale up with your turnover band at every tier, so a business turning over £2 million will pay more at Bronze than one turning over £70,000, even though the tier and its contents are identical.
What Is the Common Assessment Standard?
The Common Assessment Standard, usually shortened to CAS, is a standardised pre-qualification questionnaire developed by Build UK and Constructionline together. Its purpose is to stop contractors filling out a slightly different, overlapping questionnaire for every single client, by giving buyers and suppliers one shared, more detailed set of pre-qualification questions.
CAS covers around ten areas of compliance, including health and safety (SSIP certification), environmental management, quality management, equal opportunities, Modern Slavery Act compliance, anti-bribery and corruption policies, and Building Safety Act requirements. It replaced the older PAS 91 questionnaire, which was withdrawn in 2023, and it goes into noticeably more depth on building safety than PAS 91 ever did.
CAS is only included at Gold and Platinum level within Constructionline. Bronze and Silver cover real ground, insurance, SSIP, financial and governance checks, but they stop short of the full CAS assessment. If a main contractor’s tender documents specifically ask for “Common Assessment Standard” evidence, Bronze or Silver will not satisfy that requirement on their own, so check the exact wording before assuming a lower tier will do.
Usefully, CAS is shared across several supplier assurance schemes, not just Constructionline. Once you have evidenced it through Constructionline Gold, that same evidence base speeds up meeting the equivalent standard through CHAS Elite or Achilles’ higher tiers, since you are not starting the underlying documentation from zero each time.
How Do I Apply for Constructionline Accreditation?
The application runs through Constructionline’s online portal and follows a broadly consistent path regardless of which tier you choose:
- Register on the Constructionline platform and select the tier that matches what your clients or target tenders actually require.
- Confirm your turnover band, since this sets your pricing and joining fee.
- Gather your evidence, including insurance certificates, health and safety policy, risk assessments, financial accounts, and, for Gold or Platinum, the wider CAS documentation covering equal opportunities, environmental management and anti-bribery policies.
- Complete the online assessment, uploading documents against each required section.
- Respond to any assessor queries. It is normal to be asked to clarify or strengthen a document before approval, particularly around risk assessments that are too generic for the actual work you do.
- Receive your accreditation and appear as a verified, searchable supplier on the Constructionline database.
- Renew annually, keeping your insurance, policies and financial information current so your profile stays valid between full reassessments.
In our experience, the single biggest reason applications stall is submitting risk assessments and method statements that read as generic templates rather than documents specific to the work the business actually carries out. Assessors notice the difference immediately, and it is the most common reason for a request to resubmit.
How Long Does Constructionline Accreditation Take?
Bronze applications, where the assessment is lighter, are typically processed within a couple of weeks once full evidence has been submitted. Gold and Platinum take longer, because the desktop or site-based Common Assessment Standard review covers considerably more ground than Bronze’s insurance and SSIP checks alone, so allow closer to four to six weeks for a Gold application, longer again if a site visit needs to be scheduled for Platinum.
The single biggest factor in how quickly you get through the process is not the tier itself, it is how ready your documentation is on day one. Businesses that arrive with an up-to-date health and safety policy, job-specific risk assessments, current insurance certificates and financial statements already prepared consistently move through faster than those trying to assemble evidence mid-application.
Constructionline, SafeContractor and CHAS: Do You Need More Than One?
Plenty of businesses hold more than one accreditation scheme, and there is nothing wrong with that if your client base genuinely spans different buyer types. A contractor doing retail fit-out work alongside public sector housing repairs might reasonably need SafeContractor and Constructionline side by side. What is worth avoiding is paying for a scheme, or a tier within a scheme, that none of your actual or prospective clients ever ask for.
Getting Constructionline Accreditation Without the Guesswork
Working out the right tier, gathering evidence that will actually pass assessment first time, and keeping your Constructionline profile current between renewals is a lot easier with someone who does this every day. HSEQ Support’s consultants are Chartered Members of IOSH (CMIOSH) and registered on the Occupational Safety and Health Consultants Register (OSHCR), and we work with businesses across Medway, Maidstone, Dartford, Tunbridge Wells, Sevenoaks and the wider South East to get them accredited without the back and forth.
If you are not sure whether Bronze, Silver, Gold or Platinum is right for your tender pipeline, our Constructionline accreditation support team can review your target contracts and tell you plainly what you actually need, then manage the application, evidence gathering and renewal process for you. Get in touch for a free, no-obligation quote.
Frequently Asked Questions
What is Constructionline accreditation?
Constructionline accreditation is verification through the UK’s largest government-backed register of pre-qualified contractors and consultants, checking your insurance, health and safety, financial standing and, at Gold and Platinum level, the Common Assessment Standard, so buyers can find and vet you without running their own separate assessment.
What is the Common Assessment Standard?
The Common Assessment Standard (CAS) is a standardised pre-qualification questionnaire developed by Build UK and Constructionline, covering around ten compliance areas including health and safety, environmental management, equal opportunities and Building Safety Act requirements. It is only included at Constructionline Gold (desktop review) and Platinum (site-based audit).
How much does Constructionline cost?
Constructionline is priced against your annual turnover band rather than headcount. Bronze starts from around £219 + VAT a year for the smallest turnover band, with Silver, Gold and Platinum quoted individually against your turnover band. A one-off joining fee applies in year one only.
Do I need Constructionline Gold or is Bronze enough?
Bronze covers insurance verification and basic SSIP recognition, which is enough for some smaller contracts and supplier lists. Gold, which adds the Common Assessment Standard, is what most tier-1 main contractors and public sector frameworks now specify, so check your target tender documents before assuming Bronze will do.
Do I need Constructionline if I already have SafeContractor or CHAS?
Not automatically. All three are recognised under the Safety Schemes in Procurement (SSIP) framework, but many buyers name a specific scheme in their procurement requirements rather than accepting an alternative. If your clients or target tenders specifically ask for Constructionline, holding SafeContractor or CHAS alone will not usually satisfy that requirement.
How long does Constructionline accreditation take?
Bronze applications are typically processed within a couple of weeks once full evidence is submitted. Gold and Platinum, which include the Common Assessment Standard review, usually take four to six weeks or longer, particularly if a site-based Platinum audit needs to be scheduled.