The buyer’s question. A residential valuer uses CoStar AI or a lender’s in-house AVM to produce a comparable-sales valuation. The output materially shapes the surveyor’s figure. What does RICS require the firm to do, and what does the surveyor sign?
RICS PS Sep 2025 reference. § 4.1 on automated valuation models classifies AVM output as an aid to chartered judgement, not a substitute for it. The chartered surveyor remains personally responsible for the figure that goes into the report; the AVM run, its inputs, its comparable-evidence set and its result must be retained as part of the instruction file.
What counts as compliant. Disclose AVM use in the report. Document the comparable-evidence set the model used (not just the headline figure). Sign-off by an MRICS surveyor. Retain inputs and outputs alongside the instruction file for the standard six-year retention window. An AVM whose output is signed without a comparables record fails the standard regardless of accuracy.
What Secruna ships for AVMs. Auto-detection of CoStar AI, Reapit valuation modules, Yardi-Voyager valuation extensions, and the open-market AVM APIs your team integrates with. A pre-filled AVM disclosure block in the AI Use Disclosure Statement. A retention rule tied to the instruction so the comparables snapshot does not age out before the six-year window closes.
See this in your dashboard at: /rics/tools?category=requires_supervision filtered to AVM tools, with the disclosure-statement preview on each card.