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Aipedia: Quantity surveyors
Quantity surveyors can use AI for estimating, valuations, final accounts and claims, but RICS members and regulated firms must follow the mandatory RICS AI standard from 9 March 2026. Cost advice drives funding, payment and dispute decisions, so an AI error can quickly become a costly PI claim.
Part of: AI in quantity surveying
In short
AI is reaching quantity surveying through estimating platforms, automated take-off, valuation tools and generative AI used to draft claims and reports. For RICS members and RICS-regulated firms, the RICS standard on responsible use of AI has been mandatory since 9 March 2026. It requires written records where AI has a material impact, supplier due diligence, a named surveyor's reliability decision on outputs and advance written notice to clients. RICS-regulated firms must also hold PI at turnover-based minimums on the Approved Minimum Wording, which does not mention AI. Most AI cost errors are likely to be treated as ordinary negligence claims, subject to the policy terms.
Quantity surveyors and cost consultants are using AI at almost every stage of a project. Early on, tools generate order-of-cost estimates and benchmarks from historic cost data, and automated take-off measures quantities from drawings and models. During construction, AI helps prepare interim valuations, sort variation and compensation event records and draft payment correspondence. At the end, it can match measured work, variations and daywork to help agree final accounts. In disputes, generative AI chatbots are being used to assemble loss and expense claims, draft adjudication submissions and analyse records for quantum experts. Specialist work such as reinstatement cost assessments, capital allowances analysis, lender monitoring and whole-life costing is also being automated.
Adoption is still uneven. The RICS AI in Construction 2025 report, based on more than 2,200 professionals responding to the RICS Global Construction Monitor, found that 45% of organisations reported no AI use and only 1% had scaled AI across projects. The main barriers were a lack of skilled personnel (46%), system integration (37%) and poor data quality (30%). Even so, nearly 70% of project managers and quantity surveyors believe AI will help them deliver greater value, and 25% plan to increase AI spending in the next 12 months.
There is no statutory regulator of quantity surveying. Chartered quantity surveyors and RICS-regulated firms are regulated by RICS, and their core duties sit in the RICS Rules of Conduct (effective 2 February 2022): Rule 1 honesty and integrity, Rule 2 competence, Rule 3 good-quality, diligent service, Rule 4 respect and Rule 5 responsibility and the public interest.
The RICS professional standard on responsible use of AI in surveying practice was published in September 2025 and has been mandatory since 9 March 2026 for all RICS members and regulated firms worldwide, including quantity surveyors. It turns the Rules of Conduct into specific AI duties:
| Section | What it requires | QS example |
|---|---|---|
| 1.2 | Written record of any material-impact determination, with reasons | An estimating or valuation tool feeding advice a client relies on |
| 3.1 | No upload of private and confidential data without express prior written consent; annual training | Tender returns, client budgets, contractor rates |
| 3.2 and 3.3 | AI register, policies, and a risk register reviewed at least quarterly | Logging each cost, take-off and drafting tool |
| 4.1 | Written due diligence questions to AI suppliers, answers recorded | Cost-data and estimating platform vendors |
| 4.2 | Named, appropriately qualified surveyor decides on reliability in writing; dip sampling | Sign-off of automated rates and quantities |
| 4.3 and 4.4 | Tell clients in writing in advance; explain the system on request | Appointment terms and fee proposals |
Quantity surveyors who are not RICS members or in RICS-regulated firms are not bound by the standard and have no compulsory PI, although appointments usually set PI requirements. Data protection law still applies to everyone. Our guide to the standard in QS work goes through each duty.
The risks follow the money. An order-of-cost estimate that is too low can lead a client to buy land or agree funding it cannot sustain. A wrong date or sum in a payment or pay less notice can hand the other side an easy adjudication win. Duplicated items in a final account can cause overpayment the employer cannot recover. A reinstatement cost assessment that is too low can leave a building owner underinsured. In claims and expert work, AI can produce fictitious authorities or misread contract clauses, which damages credibility in front of an adjudicator or judge.
Two themes run through all of these. The first is false precision: an automated output looks more certain than the underlying data supports. The second is reliance: clients, funders and building owners act on QS figures, so the loss from an error is often large and foreseeable. Our existing guide to QS cost overrun disputes shows how these claims usually develop.
RICS-regulated firms must hold PI under the RICS PII Requirements, Version 11, effective 1 July 2025. The minimum limit depends on prior-year turnover: £250,000 for turnover up to £100,000, £500,000 for £100,001 to £200,000, and £1,000,000 above £200,000, on an each-and-every-claim basis with defence costs in addition. Policies must follow the RICS Approved Minimum Wording, which gives full civil liability cover and includes the IUA 04-017 cyber and data endorsement. The wording does not mention AI.
In practice, a negligent cost figure produced with AI is likely to be treated like any other negligence claim, subject to the policy terms. Software outages and data breaches are a different matter, because clauses 3 and 5 of the endorsement exclude them. CMS has said the AI standard is likely to inform how negligence claims are judged. See the RICS minimum wording explained, our analysis of the standard and PI and the wider quantity surveyors PI guide. Apex arranges PI for quantity surveyors and can review how your policy treats AI-assisted cost work.
Each guide below covers one task or issue in more depth:
For AI across the wider surveying profession, including valuation and building surveying, see AI in surveying and valuation.
Yes, for RICS members and RICS-regulated firms. The standard on responsible use of AI in surveying practice became mandatory on 9 March 2026 and applies worldwide, including to quantity surveyors and cost consultants. Quantity surveyors outside RICS are not bound by it, but it may still be cited as evidence of good practice.
No RICS disciplinary decision or UK court judgment about a quantity surveyor's use of AI had been published as at October 2026. The courts have, however, warned about fictitious AI-generated citations in Ayinde [2025] EWHC 1383 (Admin), which RICS has highlighted to expert witnesses.
The RICS Approved Minimum Wording does not mention AI. It gives full civil liability cover and says cover is not restricted solely because a computer system was used, but it excludes cyber acts, system failure and the insured's data protection breaches. How a particular AI claim is treated depends on the facts and the wording.
Start with an AI register listing every tool, its purpose, first use and next review date, then record which tools have a material impact on client advice. Send written due diligence questions to cost-data and estimating vendors, name the surveyors who sign off outputs, and update appointment terms to tell clients about AI use.
Tell us about your firm and the work you do. A broker will review how your current PI treats AI-assisted work, or arrange new cover. No fee for a quote. Or call 0117 325 0027.
Start a PI quote Request a callbackApex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority. Registered in England and Wales, company number 07014570. This page is general information about how AI is used in the profession and how insurance may respond. It is not legal, regulatory or insurance advice on your circumstances, and it does not guarantee that cover will be available or on what terms.
