The Difference Between Plan, Section and Elevation

What plan, section and elevation drawings each reveal and how to read an architectural set with confidence.

The Difference Between Plan, Section and Elevation

Architectural drawings describe a three-dimensional building through a set of two-dimensional views. Three of these views form the backbone of every project: the plan, the section and the elevation. Each cuts or looks at the building from a different direction, and together they let anyone reconstruct the design in their mind. Understanding the difference is the first step to reading any drawing set.

The Plan: Looking Down

A plan is a horizontal cut through the building, viewed from above. Imagine slicing the building with a flat plane about a meter above the floor and removing the top half; what you see looking straight down is the plan. It shows the arrangement of rooms, walls, doors, windows, furniture and circulation. A floor plan answers the question of how space is organized: where you walk, how rooms connect, how big each area is.

Plans are the most intuitive drawing because they map onto how we move through a space. Each level of a building has its own plan.

The Section: Cutting Through

A section is a vertical cut through the building, viewed from the side. Imagine slicing the building top to bottom with a vertical plane and looking at the exposed face. A section reveals what a plan cannot: ceiling heights, floor-to-floor dimensions, stairs, the relationship between levels, and how the structure stacks. It is where the vertical experience of a space becomes visible.

Sections are essential for understanding volume and for coordinating structure, so the line of cut is always marked on the plan to show exactly where the slice was taken.

The Elevation: Looking Straight On

An elevation is a view of the building from the outside, looking directly at one face, with no cut at all. Unlike a section, nothing is sliced; you simply see the facade flat-on, as if standing far enough away that perspective disappears. Elevations show the exterior composition: window placement, materials, proportions, the rhythm of the facade. A project has an elevation for each side, often labeled by orientation such as north or south.

How the Three Work Together

No single view describes a building. The plan organizes space horizontally, the section explains it vertically, and the elevation presents its outward face. A designer moves between all three constantly, because a decision in plan, such as enlarging a window, immediately changes the section and the elevation. Studios such as MÉTODO Arquitectos develop these views in parallel so the building reads as one coherent idea from every direction, not three disconnected drawings.

Reading a Set With Confidence

When you open a drawing set, orient yourself first: find the plan to understand layout, then the section to grasp heights and structure, then the elevations to see the finished face. Look for the section cut lines on the plan to connect the two. Once you can move fluidly among plan, section and elevation, an architectural set stops being abstract and becomes a clear description of a real, buildable space.