Pre qualification questionnaires and PAS 91
Contents |
[edit] Introduction
The term ‘standard selection questionnaire’ is rather self-explanatory - these questionnaires, therefore, are often standard sets of questions buyers pose to potential suppliers as part of the tender process.
Pre qualification questionnaires in construction are used by buyers as the first stage of selection. Typically, this is a box-ticking exercise that includes basic company information and checks statements of non-collusion.
Note that since this article was written Procurement Policy Notice (PPN) 03/24 clarified that PAS 91 is no longer actively supported (or updated) and that the Common Assessment Standard (CAS) is the preferred pre-qualification questionnaire for public projects. Version 4 of the Common Assessment Standard (CAS), was published on July 4 2024, and included a new Building Safety, ensuring it can be used to demonstrate companies have the organisational capability to fulfil their roles under the Building Safety Act.
For more information see article the common assessment standard.
[edit] The first stage of the PQQ
Pre qualification questionnaires are designed to act as the first stage of vetting to ensure that businesses:
- Are financially stable.
- Meet the buyer’s due diligence requirements.
- Possess the appropriate experience and technical capability to deliver the works.
Pre qualification questionnaires in construction can vary from buyer to buyer. They may use different names such as SQ (selection questionnaire) or SSQ (standard selection questionnaire). Pre qualification questionnaires (PQQ) are often marked using the pass/fail scoring methodology. They have clear yes/no answers or minimum scores for each section to be considered for the next stage.
Depending on whether the process follows the open or closed procedure, the PQQ and initial tender may be required to be completed at the same time. For the latter closed procedure, vendors must first pass this initial stage of vetting prior to completing the main tender exercise.
[edit] Evaluating the PQQ
This is one of the few sections on a typical PQQ where vendor responses are marked with scores, often with a minimum threshold required to pass to the next stage. The typical question, shared across lots of pre qualification questionnaires in construction is this:
"Please provide details of up to three contracts, in any combination from either the public or private sector, voluntary, charity or social enterprise (VCSE) that are relevant to this requirement. VCSEs may include samples of grant-funded work. Contracts for supplies or services should have been performed during the past three years. Works contracts may be from the past five years."
Word counts can vary from buyer to buyer - some requiring from as little as 200 words to larger, 1000+ word responses. Regardless, the case study should include key sections, detailing:
- The situation: An introduction.
- The task: The specifics of the task (for example, conducting boiler services and repairs across 1000+ plus properties).
- The actions: How was the contract delivered, including key challenges or issues.
- The results: A final summary detailing the successes of the contract.
Factual recall of events should be relevant to the scope of works for the contract and should demonstrate how this performance/experience makes the vendor a suitable provider.
[edit] The PAS 91
PAS 91s had been becoming increasingly popular in the construction industry, but is now effectively replaced by the Common Assessment Standard (CAS). This questionnaire had been developed by the British Standards Institute to save companies from filling out several different PQQ's. The main benefits of completing a PAS-91 were:
- Exemption granted from some core sections if the required accreditations are held.
- Questions for the core modules standardised, which meant companies coul develop standard responses to use every time.
Exemption from individual categories could also be granted through holding certain accreditations - such as an ISO 9001 quality management certificate for the performance management section. This is typically standard, however, there are sometimes slight variations from buyer to buyer. Those companies without accreditations have to answer questions in the optional and core modules.
[edit] Common Assessment Standard (CAS)
Version 4 of the Common Assessment Standard (CAS), was published on July 4 2024, and included a new Building Safety section, ensuring it can be used to demonstrate companies have the organisational capability to fulfil their roles under the Building Safety Act. Procurement Policy Notice (PPN) 03/24 clarified two issues, that PAS 91 is no longer actively supported (or updated) and that the Common Assessment Standard (CAS) is the preferred method for pre-qualification in public projects. For more information see article the common assessment standard.
As with PAS1 CAS also notes a number of potential exemptions, where company holds any of the following certifications:
- ISO 9001
- ISO 14001 / EMAS
- ISO 27001 / Cyber Essentials Plus
- ISO 45001 / SSIP
- BS 99001
- ISO 19650-2
[edit] Relationship with tenders
Buyers can potentially receive hundreds of tender submissions for a single contract, and as such, it’s in their interest to ensure that suppliers are both vetted and checked to ensure they both fulfil their legal obligations but also that inadequate suppliers can be excluded as early as possible, saving both time and money.
[edit] Related articles on Designing Buildings
Featured articles and news
We're expanding our collaborative mission by launching DB Intelligence, an exclusive market research advisory panel. Built environment professionals can now get paid to share their expertise on industry trends, products and services.
Panel members receive direct financial incentives for participating in research projects like short surveys, 1-2-1 interviews and focus groups. Register today to shape the future of the construction sector.
Planning condition discharge in England and Wales
A brief exoplanation from a building compliance expert, with further links.
Overheating guidance and tools for building designers
Guidance for dealing with element of building fabric control that have increasing importance.
Shading for housing, a design guide
From the Good Homes Alliance and British Blind and Shutter Association.
UK Standard Skills Classification (SSC)
A shared framework for describing skills needs.
Social media ban consultation comes to close
CIOB urges UK Government to consider social media’s role in careers guidance in ban debate.
The latest of eight Skills England apprenticeship units
The addition of battery manufacturing welcomed by ECA with a warning about the risks of fast-tracked apprenticeship units.
Building Control Independent Panel final report
A precis of a key report led by Dame Hackitt with full recommendations and link to the government response.
Building Safety recap April, 2026
A short and longer run-through of the month, with links to further information and sources.
CIAT May 2026 briefing.
From medieval scribes to modern word art.
ECA welcomes crackdown on late payment and push for clean energy, whilst CIOB seek fixed cladding removal timeframes.
Cyber Security in the Built Environment
Protecting projects, data, and digital assets: A CIOB Academy TIS.
Managing competence in the built environment
ITFG publishes new industry guide on how to meet the ICC principles.
The UK's campaign to reduce noise pollution: Mythbusting, articles and topic guides.




















