California Code, Government Code - GOV § 27371

The fee for recording each map or plat where it is copied in a book of record is ten cents ($0.10) for each course, plus ten cents ($0.10) a folio for letters and figures on the map or plat.

When recording is by a photographic method the fee for recording each map or plat shall be the same as provided for under Sections 27361 and 27361.5 of this code.