Cal. Bus. & Prof. Code § 5615
As used in this chapter:
"Landscape architect" means a person who holds a license to practice landscape architecture in this state under the authority of this chapter.
A person who practices landscape architecture within the meaning and intent of this article is a person who offers or performs professional services, for the purpose of landscape preservation, development and enhancement, such as consultation, investigation, reconnaissance, research, planning, design, preparation of drawings, construction documents and specifications, and responsible construction observation. Landscape preservation, development and enhancement is the dominant purpose of services provided by landscape architects. Implementation of that purpose includes:
Landscape architects perform professional work in planning and design of land for human use and enjoyment. Based on analyses of environmental physical and social characteristics, and economic considerations, they produce overall plans and landscape project designs for integrated land use.
The practice of a landscape architect may, for the purpose of landscape preservation, development and enhancement, include: investigation, selection, and allocation of land and water resources for appropriate uses; feasibility studies; formulation of graphic and written criteria to govern the planning and design of land construction programs; preparation review, and analysis of master plans for land use and development; production of overall site plans, landscape grading and landscape drainage plans, irrigation plans, planting plans, and construction details; specifications; cost estimates and reports for land development; collaboration in the design of roads, bridges, and structures with respect to the functional and aesthetic requirements of the areas on which they are to be placed; negotiation and arrangement for execution of land area projects; field observation and inspection of land area construction, restoration, and maintenance.
This practice shall include the location, arrangement, and design of those tangible objects and features as are incidental and necessary to the purposes outlined herein. Nothing herein shall preclude a duly licensed landscape architect from planning the development of land areas and elements used thereon or from performing any of the services described in this section in connection with the settings, approaches, or environment for buildings, structures, or facilities, in accordance with the accepted public standards of health, safety, and welfare.
This chapter shall not empower a landscape architect, licensed under this chapter, to practice, or offer to practice, architecture or engineering in any of its various recognized branches.
Ca. Bus. and Prof'l. Code § 5615