A single joint expert — SJE — is one independent expert instructed jointly by both sides of a dispute, instead of each party hiring its own. In property litigation the SJE is usually a chartered surveyor or valuer, and for smaller and mid-value claims the courts now treat joint instruction as the default expectation rather than the exception.
How a Single Joint Expert Works
Both parties agree the expert’s identity and share the letter of instruction; each side may put questions, and both receive the same report at the same time. The expert’s duty, as with all CPR Part 35 work, is to the court alone. Costs are normally shared equally, which — combined with avoiding a second expert entirely — makes the SJE route substantially cheaper and faster than opposing experts.
When Courts Prefer an SJE
Boundary rows, party wall damage claims, valuation differences in divorce or probate, dilapidations quantum and straightforward defect disputes are classic SJE territory. Courts reserve party-appointed experts for cases where the technical issues are genuinely contested or the sums justify duplicated cost.
Choosing the Right SJE
Because there is only one expert, credentials and neutrality matter more, not less. Look for RICS accreditation, real experience of the property type and issue in dispute, Part 35 report experience, and a clear fixed fee. Both sides should feel the expert has no history with either of them.
Our SJE Service
Manchester Surveyors accepts single joint expert instructions across boundary disputes, valuation disputes, dilapidations and party wall matters, with Part 35 compliant reports and fixed fees agreed with both parties before work begins. Read more about what an expert witness does.
Solicitor or party seeking a jointly instructed surveyor? Call 020 4579 8270 to discuss availability and fees.