An elevation plan is an architectural drawing that shows what a building looks like from the outside, straight on, as if you were standing in front of it. While a floor plan shows a building from above (the layout of rooms and hallways), an elevation plan shows the vertical face of a structure: its height, the placement of windows and doors, rooflines, exterior materials, and overall proportions. Most building projects include at least four elevation drawings, one for each side of the building.
What an Elevation Plan Shows
Think of an elevation plan as a portrait of your building’s face. It captures everything visible on one exterior wall, drawn to scale and flattened into two dimensions. You’ll see the height of the roof ridge, the size and position of every window and door, the slope of the roof, and where different cladding materials start and stop. Architects use annotations and small symbols to call out specific materials (brick, siding, stone) and to mark precise heights above a reference point, usually the finished ground level or the main floor.
Elevation plans also communicate proportions that a floor plan simply cannot. You can see whether a second-story window lines up with the one below it, how tall a porch column is relative to the front door, or whether a chimney looks balanced against the roofline. These are design decisions that only become visible when you look at the building from the side rather than from above.
Exterior vs. Interior Elevations
When most people say “elevation plan,” they mean an exterior elevation, the view of the building’s outside walls. But architects and interior designers also produce interior elevations. These show individual walls inside a room, drawn as if you were standing across the room looking straight at that wall. Interior elevations are especially useful for kitchens, bathrooms, and built-in cabinetry because they reveal ceiling heights, countertop heights, the placement of outlets, and how upper and lower cabinets relate to each other.
A related but distinct drawing is a building section. While an elevation shows the surface of a wall, a section slices through the entire structure to reveal what’s inside: wall thickness, insulation layers, ceiling construction, and how different floors stack on top of each other. Sections show what the building is made of; elevations show what it looks like.
Why Elevation Plans Matter for Permits
Local building departments almost always require elevation drawings as part of a permit application. Zoning codes set limits on building height, and an elevation plan is the document that proves your design stays within those limits. Many neighborhoods also have design guidelines governing roof pitch, façade materials, or how much of the front wall can be garage door. Reviewers compare your elevation drawings against these rules before approving construction.
In flood-prone areas, elevation planning takes on extra importance. Federal standards require buildings to sit above the base flood elevation (the water level expected during a major flood). Essential facilities like hospitals and emergency shelters must be built at least two feet above that baseline, or above the 500-year flood level, whichever is higher. Even standard residential buildings in high-hazard coastal zones may need their lowest structural members raised one to two feet above the flood baseline, depending on how the structure is classified. Getting this wrong can mean a denied permit, higher insurance premiums, or real damage in a storm.
How Elevation Plans Are Created Today
Traditionally, architects drew elevations by hand, projecting heights and widths from floor plans using drafting tools. That process still works, but most professionals now use Building Information Modeling (BIM) software. In a BIM workflow, the architect builds a single three-dimensional digital model of the entire structure. The software then generates elevation views automatically from that model, pulling accurate dimensions, material labels, and height references directly from the 3D data. If the architect changes a window size in the model, every affected elevation updates instantly.
This is a meaningful upgrade over older computer-aided drafting (CAD), where each drawing was essentially independent. With BIM, the floor plan, the elevations, the sections, and even material schedules all stay connected because they’re different views of the same model. For homeowners reviewing plans, this means fewer errors and a more accurate picture of the finished building.
Elevation Planning for Flood Protection
One of the most practical uses of the term “elevation plan” comes up in flood mitigation: physically raising an existing house above expected flood levels. If your home sits in a flood zone, an elevation plan in this context refers to the engineered strategy for lifting the structure onto new piers, posts, or pilings so floodwaters pass underneath rather than through your living space.
The costs vary significantly by home size. Raising a 1,000-square-foot house typically runs $10,000 to $30,000, while a 2,500-square-foot home can cost $25,000 to $60,000. If the project specifically involves flood zone compliance, with engineered pilings, extensive permitting, and structural reinforcement, the price range climbs to roughly $20,000 to $80,000. These projects require structural engineers, specialized contractors, and coordination with local floodplain managers.
The health payoff of proper elevation is substantial. When floodwaters sit inside a building for days or weeks, they create near-ideal conditions for mold growth. The CDC has documented that post-flood mold contamination is one of the most persistent health hazards following hurricanes and major floods. Floodwater also carries sewage, chemical contaminants, and supports infestations of rodents, cockroaches, and mosquitoes. Elevating a structure above flood levels eliminates most of these risks before they start.
Elevation and Accessibility
Elevation planning also intersects with accessibility design. Whenever a building entrance sits above grade, ADA standards require a ramp with a maximum slope of 1:12, meaning one inch of rise for every 12 inches of horizontal length. Each continuous ramp run can climb no more than 30 inches before a flat landing is required. There’s no limit on how many runs you can connect, so even a significant elevation change can be made accessible, but it takes space. Architects factor these requirements into elevation plans early in the design process because a ramp that meets code for a three-foot height change needs at least 36 feet of horizontal run, plus landings.
How to Read an Elevation Plan
If you’re looking at elevation drawings for the first time, start with orientation. Each drawing is labeled by the direction it faces (north elevation, south elevation) or by its relationship to the street (front elevation, rear elevation). Heights are marked relative to a fixed reference point, often labeled “0′-0″” at the main floor level. Numbers above that line tell you how high elements sit; numbers below it indicate foundations or basement depth.
Material patterns are shown with standardized hatching. Diagonal lines in one direction typically represent brick, small dots suggest concrete, and horizontal lines often indicate wood siding, though a legend on the drawing confirms what each pattern means. Windows and doors appear as simplified outlines, sometimes with notes indicating whether they open, slide, or are fixed glass.
Look for dimension strings running along the edges of the drawing. Vertical dimensions tell you floor-to-floor heights, window header heights, and roof peak measurements. If something looks off to you proportionally, check these numbers. A window that appears small in a scaled drawing might actually be five feet tall, and the dimensions are there to confirm it.