Property Expert Witness Report: What It Covers and How Long It Takes

A property expert witness report is an independent, court-compliant opinion from a chartered surveyor on a disputed property question: what a defect is, what caused it, what it will cost to put right, or what a building or lease interest is worth. Written under CPR Part 35 and its Practice Direction, the report is addressed to the court rather than to whoever pays for it. This guide explains what a property expert witness report covers, the stages it goes through, and how long each stage realistically takes in a UK dispute.

What does a property expert witness report cover?

The scope is fixed by the letter of instruction and, where proceedings have started, by the court's order granting permission for expert evidence. In property matters the report will usually address some or all of the following:

• The condition of the building at the date of inspection, recorded in a factual, photographed schedule so the court can see exactly what the expert saw.
• The cause of the problem: whether cracking is subsidence or thermal movement, whether damp is a failed damp-proof course or condensation, whether a roof leak is workmanship or design.
• Breach of the relevant standard: whether work complied with the contract, the Building Regulations, the RICS Home Survey Standard (for negligence claims against a surveyor), or the repairing covenant in a lease.
• Remedial works and cost: a costed schedule of what needs to be done, typically priced against current published rates or contractor quotations.
• Valuation questions where the dispute turns on value, such as diminution in value after a negligent survey or the premium for a lease extension.

Whatever the subject, the document must contain the elements set out in Practice Direction 35: the expert's qualifications, the literature and documents relied on, the facts and assumptions behind each opinion, a summary of any range of opinion, the conclusions, and the statement of truth and declaration that the expert understands their overriding duty to the court.

What the report does not do

An expert witness report is not a home survey with a court heading on it. Your surveyor is not there to advise you on whether to proceed with a purchase, negotiate on your behalf, or argue your case; a report that reads as advocacy will be criticised by the judge and can be excluded altogether. Nor does the report decide legal questions such as whether a contract term was incorporated or whether a claim is out of time. Those are for the lawyers. The expert's job is to give the court an honest technical opinion, including the points that help the other side. If you want a surveyor to advise you privately before deciding whether to litigate, that is a separate expert advisor role, and a different kind of engagement.

The stages from instruction to signed report

Most property expert witness reports pass through the same sequence, and understanding it is the best way to estimate how long your own report will take.

• Conflict check and terms (1–3 working days). The surveyor confirms no prior involvement with the parties or the property, agrees the scope, and issues fee terms. Where a Single Joint Expert is being appointed, both sides must agree the instruction first, which can add a week or more.
• Document review (1–2 weeks). The expert reads the pleadings, contract, drawings, previous survey reports, correspondence and photographs. Missing documents are the most common cause of delay at this stage.
• Site inspection (half a day to two days on site). Access must be arranged with the occupier and, in a party-appointed case, often with the other side's expert present. Opening-up works, drainage surveys or level monitoring may be needed, and monitoring alone can take three to six months for suspected subsidence.
• Analysis and drafting (2–4 weeks). The expert forms opinions, prices remedial works and writes the report to the Part 35 format.
• Solicitor review and finalisation (1–2 weeks). The instructing solicitor checks the report answers the questions in the order and that the formal declarations are present. The expert's opinions are not changed by this process, only the clarity of the presentation.

How long does a property expert witness report take?

For a straightforward matter with good documents and easy access, six to eight weeks from instruction to signed report is a realistic expectation. A dispute involving several properties, structural monitoring, laboratory testing or a large remedial schedule can take three to six months. The court's directions timetable usually sets the outer limit: once permission is granted, the order will state the date by which reports must be exchanged, and the expert's programme has to work backwards from it.

Three factors do most to shorten the timescale. Instruct the expert early, ideally before proceedings are issued, so that the inspection is not being squeezed into a directions window. Supply a complete bundle at the outset rather than in instalments. And agree access dates for the inspection as soon as the instruction is confirmed. Where a report is needed urgently, for example to support an application for an injunction or to meet a pre-action protocol deadline, a shorter preliminary report can sometimes be produced in two to three weeks, with the full Part 35 report to follow.

What happens after the report is served

Serving the report is rarely the end of the expert's involvement. Under CPR 35.6 the other party may put written questions to the expert within 28 days, which must be answered and form part of the evidence. Where both sides have appointed experts, the court will normally direct a without-prejudice discussion between them and a joint statement under CPR 35.12 setting out what is agreed and what is not. This often narrows the issues dramatically and can lead to settlement. If the case goes to trial, the expert may be called to give oral evidence and be cross-examined, and the report is the document they will be held to. Fees for these later stages are usually charged separately from the report, so it is worth asking for a breakdown at the outset; the panel's guide to expert witness costs in the UK sets out typical figures.

Typical fees for a property expert witness report

Expert witness work is charged at professional rather than survey rates because of the liability, the formality and the time involved. For a straightforward property dispute, a full CPR Part 35 report from a chartered surveyor typically costs between £5,000 and £15,000. Complex multi-issue matters, or those requiring intrusive investigation and specialist testing, can run to £20,000–£50,000 or more. Hourly rates for RICS expert witnesses generally fall in the £150–£300 range, and attendance at court is usually charged at £1,000–£2,000 per day. Fees are normally payable by the instructing party in the first instance, with recovery from the losing side dealt with as part of costs at the end of the case. Where the sums in dispute are modest, it is sensible to check with your solicitor that the likely cost of expert evidence is proportionate before committing to a full report.

Arranging a property expert witness report through Survey Merchant

Survey Merchant provides RICS chartered surveyors from a national panel of more than 2,400 professionals who prepare CPR Part 35-compliant expert witness reports for property disputes across England, Wales and Scotland. The panel's experts act as party-appointed experts or Single Joint Experts in construction and building defect claims, surveyor negligence, housing disrepair, dilapidations and boundary disputes. We match the discipline to the dispute, quote fixed fees for the report stage wherever the scope allows, and can arrange inspections to fit a court timetable. Solicitors and litigants can outline the matter through the expert witness services page, contact the team or call 0204 579 8270 to discuss timescales and obtain a fee proposal.