Short answer: A story is typically 10 to 15 feet tall. In most residential buildings, one story is often around 10 feet. In commercial buildings, a story is usually closer to 12 to 15 feet.
A story, also spelled storey in British English, is the height of one level of a building. Knowing how many feet are in a story helps estimate the total height of homes, office buildings, and skyscrapers. It also helps put the scale of iconic buildings like Willis Tower into perspective, especially when you experience that height in person at Skydeck Chicago.
How Many Feet Is One Story?
- Residential buildings: usually about 8 to 10 feet per story
- Commercial buildings: usually about 12 to 15 feet per story
- Overall average: often estimated at about 14 feet per story
While these are common ranges, actual story height can vary quite a bit. Older homes may be closer to 8 or 9 feet per story, while newer office buildings, hotels, and luxury developments may exceed 15 feet on some levels because of taller ceilings, larger lobby spaces, or added mechanical systems.
How Tall Is a Building Story?
Story height depends on more than just the visible ceiling. In most buildings, the total height of a story includes the floor-to-floor measurement, not just the interior space you can stand in. That means the structure between floors also matters.
Several factors affect story height, including ceiling height, floor thickness, insulation, structural material, and building use. Stories within the same building are not always the same height either. For example, a lobby is often taller than the upper floors above it.
This is especially relevant in skyscrapers. Willis Tower is a strong example of how building design affects story height and overall scale. Its bundled-tube structure allows for large, open interior floor plates without center columns, which helps create the spacious experience seen in the observation deck and family-friendly exhibits near the top of the tower, where visitors can see how big Chicago really is.
What Affects Story Height?
Story height is typically measured as floor-to-floor height, not just ceiling height. That means one story includes the usable interior space plus the structural and mechanical space between levels.
- Ceiling height: The clear interior height people see and use
- Floor thickness: Structural support between one level and the next
- Mechanical systems: HVAC, electrical, plumbing, sprinklers, and cabling
- Building material: Steel, concrete, masonry, and wood all influence design limits
- Building purpose: Homes, offices, hotels, and skyscrapers often use different floor-to-floor standards
Building material can also affect maximum wall and story height. For example:
- Wood wall framing – Max story height of 11 feet, 7 inches
- Cold-formed steel wall framing – Max story height of 11 feet, 7 inches
- Masonry walls – Max story height of 13 feet, 7 inches
- Insulated concrete form walls – Max story height of 11 feet, 7 inches, with max unsupported wall height per story of 10 feet
- Structural insulated panel walls – Max story height of 11 feet, 7 inches, with bearing wall height per story of 10 feet
Story vs. Floor: Is There a Difference?
In the United States, story and floor are often used interchangeably. Both usually refer to one level of a building.
That said, there is a subtle difference in some contexts. A story refers to the level itself in the vertical structure of a building, while a floor can also refer to the physical surface you walk on.
Terminology also changes by region. In much of Europe, the “first floor” is the level above the ground floor. In the United States, that same level would usually be called the second floor.
How to Calculate Building Height From Stories
You can estimate total building height with a simple formula:
Total building height = number of stories × average height per story
- 10-story residential building: about 100 feet
- 20-story commercial building: about 240 to 300 feet
- 50-story skyscraper: about 600 to 750 feet
For a real-world example, Willis Tower rises 110 stories and reaches 1,450 feet. That helps show how story height can vary within a supertall building while still producing a clear average range overall. Visitors at The Ledge on the 103rd floor can experience what this height really feels like rather than just reading the number on a screen.
Story Height Calculator
Use this calculator to estimate building height based on the number of stories and building type.
How Tall Are Buildings by Number of Stories?
These estimates are based on common residential and commercial building standards. Actual building heights can vary, especially in towers where lobbies, observation floors, and mechanical levels are taller than standard upper floors.
For comparison, a typical 100-story building often falls between 1,200 and 1,500 feet tall. Willis Tower sits in that range at 1,450 feet, which makes Skydeck Chicago a useful real-world example of what extreme story count looks like at full scale.
Story Height by Building Level
Although there are general averages, story height can vary within the same building depending on function and location.
- Top story / attic – At least 50% of the usable area must have ceilings of at least 7 feet
- Mezzanine – A partial floor typically located between the ground floor and second floor
- Main floor / lobby – Usually taller than upper floors and often designed as a major entrance space
- Upper ground – A main entrance floor set slightly above ground level
- Garden level – A story situated between a basement and first floor
- Lower ground – A story below upper ground level
- Basement – A level that is partly underground but still qualifies as a story under certain conditions
- Crawl space – A small space at or below grade, typically 3.9 feet high or less
- Cellar – A storage level beneath lower ground level
How Tall is 110 Stories? Find Out With Skydeck
Now that you know story height can vary, it becomes easier to understand just how impressive a 110-story building really is.
Willis Tower reaches 110 floors and a staggering 1,450 feet. It is one thing to read that number. It is another thing entirely to stand high above Chicago and experience it for yourself at Skydeck Chicago.
For groups, families, and special events, that height becomes part of the experience. Contact Skydeck Chicago to plan your group visit or a memorable event up on the 103rd floor.
Frequently Asked Questions
How many feet is one story in a building?
On average, one story in a residential building is about 10 feet tall, while a story in a commercial building usually ranges from 12 to 15 feet depending on design and ceiling height.
What is the difference in story height between residential and commercial buildings?
Residential stories are usually shorter and designed for living spaces, while commercial stories are often taller to allow for larger ceilings, HVAC systems, and open layouts.
How do you calculate the total height of a building in feet from the number of stories?
Multiply the number of stories by the average height per story. For example, a 20-story residential building is usually around 200 feet tall, while a 20-story commercial building may be much taller.
How tall is a 20-story building?
A 20-story building is typically between 200 and 300 feet tall, depending on whether it is residential, commercial, or mixed use.
What is the average height of a story in a skyscraper?
In skyscrapers, a story is usually between 12 and 15 feet tall, although some levels may be taller to accommodate observation decks, lobbies, or mechanical systems.
How many stories is Willis Tower and where is Skydeck located?
Willis Tower is 110 stories tall. Skydeck Chicago is located on the 103rd floor, offering panoramic views of the city from 1,353 feet above ground. Visitors can step out onto The Ledge, a glass balcony that extends from the building for a unique view straight down.