Professional evidence informs review of the draft specification. This is work in development, not an adopted requirement.
An inspection or valuation produces findings that others rely on. Observations, professional judgements and limitations need to remain distinguishable when those findings are shared.
Two floor-area figures can differ because they include different spaces, even when both measurements are accurate.
At the Open Property Data Association (OPDA), our working groups need professional experience to help make these distinctions clear. Help explain how measurements and findings should carry their basis, qualifications and uncertainty beyond the original report.
Registration expresses interest, subject to OPDA review, not automatic membership or access.
Register your interest: https://opda.org.uk/join?context=surveying-and-valuation
