First Time Door Buyer's Guide
Commercial door sizes are one of the most important specifications on any construction project. Selecting the correct door width and height affects code compliance, accessibility, safety, occupant flow, hardware selection, and overall building performance.
Whether you are purchasing commercial metal doors, commercial wood doors, storefront doors, wind-rated doors, or metal building doors, understanding standard commercial door sizes can help prevent costly delays and installation issues.
This guide covers standard commercial door widths, average commercial door heights, common door size combinations, and the standard dimensions available across the most popular commercial door types.
What Is the Standard Commercial Door Size?
The most common standard commercial door size is 3'0" x 7'0" (36" x 84").
This commercial door width and height combination is widely used in office buildings, schools, healthcare facilities, multifamily housing, retail spaces, warehouses, and industrial buildings.
When planning a commercial door installation, many people ask: what is standard door size, and can it be used in a non-standard opening? The answer is yes, and in most cases, it’s the smarter approach. At CDF Distributors, we strongly recommend using standard size doors instead of ordering fully custom products whenever possible. With the right adjustments, standard doors can fit a wide variety of openings while delivering significant cost and scheduling benefits.
What Is a Standard Door Size?
In commercial construction, door sizes are standardized to simplify manufacturing, installation, and replacement. Both metal and wood doors typically come in a 1-3/4” thickness and are produced in a range of common dimensions.
Standard Commercial Door Width Options
- 2'0" (24")
- 2'6" (30")
- 2'8" (32")
- 3'0" (36") - the most popular standard commercial door width
- 3'4" (40")
- 3'6" (42")
- 3'8" (44")
- 4'0" (48")
Average Commercial Door Height Options
- 6'8" (80") - great for older buildings
- 7'0" (84") -
If you are buying a door for the first time, terms like door handing and door swing direction can feel confusing. These details matter more than most people expect. Choosing the wrong swing can lead to installation problems, code issues, or a door that does not function the way you need it to.
Understanding how commercial door swing works helps ensure your door opens correctly, meets building requirements, and supports safe movement through the space. This guide breaks down the basics so you can confidently choose the right direction for your door.
Door Handing vs Door Swing
Door handing and door swing direction are closely related and often used together, but they describe slightly different parts of how a door operates. Door handing refers to which side the hinges are on when you are standing on the outside of the door, while door swing describes the direction the door opens from that same position.
You may also hear terms like swing side, hinge side, or see diagrams in a commercial