An expert witness is a professional whose specialist knowledge a court, tribunal or arbitrator relies on to understand technical questions — and whose duty is owed to the court, not to the party paying them. In property disputes, that expert is usually a chartered surveyor, and the questions are practical: Was the survey competent? What caused the damage? Where does the boundary run? What was the property really worth?
What Makes an Expert Witness Different From an Advisor?
Any surveyor can give you advice. An expert witness gives the court an independent opinion, under CPR Part 35: their report must confirm they understand their duty to the court, cover the facts and reasoning transparently, and stand up to cross-examination. That independence is the point — a judge gives little weight to a hired cheerleader, and a good expert will tell you early if your case is weak, saving you far more than their fee.
When Do You Need One?
Typically when a property dispute moves beyond negotiation: professional negligence claims about a missed defect or careless valuation, boundary disputes, dilapidations claims between landlords and tenants, housing disrepair cases, construction defect claims and valuation disputes in divorce, tax or purchase contexts. Solicitors usually instruct the expert, but individuals can approach us directly for an initial view.
Party-Appointed or Single Joint Expert?
Courts increasingly favour a single joint expert instructed by both sides in lower-value disputes — faster and cheaper than duelling experts. In higher-value or more technical claims, each party may appoint its own. We accept both forms of instruction.
What It Costs
Expert witness work is quoted case by case, but fees are fixed at instruction and modest compared with the sums at stake in most property litigation. An early expert view often settles matters before proceedings begin — the cheapest outcome of all.
Need an independent expert view on a property dispute? Our RICS expert witness surveyors act nationwide. Call 020 4579 8270.