Pеtitioners, landowner-defendants in an eminent domain proceeding, seek a writ of prohibition to restrain respondent court from enforcing an ordеr requiring petitioners to disclose, in answer to interrogatories, the following information about a real estate appraisal obtained by petitioners’ former attorney: (1) the appraiser’s name and address; (2) the date he was hired; (3) whether he rendered an opinion of the fair market value of the property sought to be condemned; and (4) the appraiser’s opinion of the fair market value of the property. In oppositiоn to real party in interest State of California’s motion in the superior court to compel answers to these interrogatories, petitioners filed their joint declaration, under penalty of perjury, asserting that their former attorney did hire a real estate appraiser to assist him in forming an oрinion about the case. The declaration continued:
“ [A] 11 of the information obtained by the said appraiser was obtained solely and exclusivеly for the information and eyes of our said attorney; and was at all times treated as confidential . . . that the information developed by said apрraiser was not for the purposes of obtaining testimony for trial but solely and exclusively for the information of the [attorney], and declarants do not рlan to call said appraiser as a witness in the trial of this action. ’ ’
Nevertheless the superior court ordered petitioners to answer.
Petitioners claim the protection of the statutory privilege covering an attorney’s work product. See McCoy, California Civil Discovery Work Product of Attorneys (1966) 18 Stan.L. Rev. 783 for a review of the cоntext of case law in which the Legislature in 1963 (Stats. 1963, ch. 1744) expressly sanctioned the nondiscoverability of an attorney’s work product. By that enactment Cоde of Civil Procedure section 2016 was amended to include a provision that1 ‘ The work product of an attorney shall not be discoverable unless the court determines that denial of discovery will unfairly prejudice the party seeking discovery in preparing his claim or defense or will result in an injustice, and any writing that reflects an attorney’s impressions, conclusions, opinions, or legal research or theories shall not be discoverable under any сircumstances.” The same amendment added subdivision (g):
“It is the policy of this State (i) to preserve the rights of attorneys to prepare cases for trial with that degree of privacy necessary to encourage them to prepare their cases *10 thorougMy and to investigate not only the favorable but the unfavorable aspects of such cases and (ii) to prevent an attorney from taking undue advantage of his adversary’s industry or efforts. ’ ’
Real party in interest first contends that the declaration presented to respondent court by petitioners is hearsay and that since petitioners’ fоrmer attorney did not file a declaration in support of their contention there is no competent evidence to show that the work produсt privilege applies. It is true that an affidavit which sets forth only hearsay and conclusionary material is incompetent.
(Wilson
v.
Superior Court
(1964)
The state next contends that as a matter of law appraisal information cannot be protected from discovery as an attorney’s work product. The 1963 amendments to Code of Civil Procedure section 2016 contain nо definition of “work product” and we must therefore resort to the cases and to the policy declared in Code of Civil Procedure section 2016, subdivisiоn (g), in determining whether work product is involved here. Information regarding events provable at trial, or the identity and location of physical evidencе, cannot be brought within the work product privilege simply by transmitting it to the attorney. But the cases indicate generally that material of a derivative chаracter, such as diagrams prepared for trial, audit reports, appraisals, and other expert opinions, developed as a result оf the initiative of counsel in preparing for trial, are to be protected as work product. In
*11
San Diego Professional Assn.
v.
Superior Court
(1962)
We may surmise that petitioners’ former attorney, by consulting the appraiser, developed an “unfavorаble aspect” of the ease in the form of a low valuation opinion. But petitioners’ declaration asserted facts which would qualify the valuation data as work product. The state made no showing, through affidavits or other evidence, either contradicting petitioners’ declaration оr indicating that unfair prejudice would result from denial of discovery regarding that opinion. If we assume that the appraiser was properly qualified аnd that his opinion would be relevant and admissible, the fact remains that there is nothing unique and irreplaceable about his opinion. The state will have nо difficulty in obtaining the opinions of other appraisers; thus there is no showing that any injustice will result if the privilege is upheld.
*12 A peremptory writ of prohibition will issue restraining enforcement of respondent court’s order.
Devine, P. J., and Rattigan, J., concurred.
