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An architectural drawing or architect's drawing is a technical drawing of a building (or building project) that falls within the definition of architecture. Architectural drawings are used by architects and others for a number of purposes: to develop a design idea into a coherent proposal, to communicate ideas and concepts, to convince clients of the merits of a design, to enable a building contractor to construct it, as a record of the completed work, and to make a record of a building that already exists.

Architectural drawings are made according to a set of conventions, which include particular views (floor plan, section etc.), sheet sizes, units of measurement and scales, annotation and cross referencing. Conventionally, drawings were made in ink on paper or a similar material, and any copies required had to be laboriously made by hand. The twentieth century saw a shift to drawing on tracing paper, so that mechanical copies could be run off efficiently.

The development of the computer had a major impact on the methods used to design and create technical drawings,making manual drawing almost obsolete, and opening up new possibilities of form using organic shapes and complex geometry. Today the vast majority of drawings are created using CAD software.
The information shown on a locating drawing will be overall sizes, levels and references to assembly drawings. They are intended to show the location of the works, not detail (a common mistake). The location drawings, which can be plans, elevation or sections, are numbered consecutively with the prefix L.
Typically, location drawings will include:
Block plans.
Site plans.
Floor plans.
Foundations plans.
Roof plans.
Section through the entire building.
Elevations.British Standard Specification 1192 includes recommended or preferred scales for location drawings.
Block plans
Block plans usually show the siting of the project in relation to Ordnance Survey Maps.