Complete Guide for General Contractors: Everything You Need to Know About Commercial Door Sizes

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. While 36" x 84" is considered the industry standard commercial door size, commercial doors are available in a wide range of widths and heights depending on the application.

Other common commercial door sizes include:

• 3'0" x 6'8" (36" x 80")

• 3'0" x 7'0" (36" x 84")

• 3'0" x 8'0" (36" x 96")

• 4'0" x 7'0" (48" x 84")

• 6'0" x 7'0" (72" x 84") double doors

For most commercial projects, the standard commercial door width is 36 inches, while the average commercial door height is either 80 inches, 84 inches, or 96 inches.

Important: Nominal Door Sizes vs. Actual Door Sizes

When discussing standard commercial door sizes, the dimensions listed throughout this guide refer to nominal door sizes, which are the industry-standard sizes used for specifying and ordering doors.

The actual manufactured size of a commercial door is slightly smaller than its nominal size to allow for proper clearances within the frame and ensure smooth operation.

For example:

• A nominal 36" x 84" (3070) door is manufactured slightly smaller than 36" wide and 84" high.

• Actual door width is typically 1/4" less than the nominal width, providing approximately 1/8" clearance on both the hinge and strike sides.

• Actual door height is typically 7/8" less than the nominal height to accommodate standard clearances at the top of the opening and the door undercut.

• Standard commercial doors are 1-3/4" thick.

Because clearances vary by frame type, hardware, threshold requirements, and project conditions, contractors should always verify door, frame, and opening dimensions before ordering.

The dimensions referenced throughout this article are nominal door sizes, not actual manufactured door dimensions.

Standard Commercial Door Widths

Commercial door widths vary based on occupancy type, accessibility requirements, traffic flow, and building use. The most common commercial door width is 36 inches (3'0"), but standard commercial door widths generally range from 24 inches to 48 inches.

Common commercial door width options include:

When contractors ask, "What is the standard commercial door width?" the answer is typically 36 inches.

Average Commercial Door Height

The average commercial door height depends on the building type and architectural requirements.

The most common standard door height options include:

For modern commercial construction, 84-inch doors are among the most frequently specified heights because they provide additional clearance while maintaining a professional appearance.

If you're wondering what the standard door height is for commercial buildings, the answer is typically 80", 84", or 96", with 84" being one of the most common specifications.

Standard Commercial Metal Door Sizes

Commercial metal doors are the most commonly specified door type in schools, hospitals, warehouses, office buildings, government facilities, and industrial properties. Their durability, security, and fire-rating capabilities make them the preferred choice for many commercial applications.

All standard commercial metal doors are manufactured at a thickness of 1-3/4".

The most popular commercial metal door sizes include:

• 3068 (36" x 80")

• 3070 (36" x 84")

• 3080 (36" x 96")

These three sizes represent some of the most commonly purchased commercial metal doors in the industry.

6'8" Commercial Metal Door Sizes

Available widths:

24", 28", 30", 32", 36", 40", 42", and 48"

7'0" Commercial Metal Door Sizes

Available widths:

24", 28", 30", 32", 36", 42", and 48"

8'0" Commercial Metal Door Sizes

Available widths:

24", 28", 30", 32", 36", 42", and 48"

Commercial Wood Door Sizes

Commercial wood doors offer the architectural appearance of real wood while maintaining the durability required for commercial construction. They are commonly installed in office buildings, schools, hospitality projects, multifamily developments, healthcare facilities, and institutional buildings.

Like hollow metal doors, commercial wood doors are manufactured at a standard thickness of 1-3/4".

The most popular commercial wood door sizes are:

• 3068 (36" x 80")

• 3070 (36" x 84")

• 3080 (36" x 96")

Commercial wood doors are available in widths ranging from 24" to 48" and heights of 80", 84", and 96" to accommodate a variety of commercial openings.

Wind Rated Door Sizes

Wind-rated doors are engineered to withstand high wind pressures and severe weather conditions. They are commonly installed in coastal regions, hurricane-prone areas, educational facilities, government buildings, and critical infrastructure projects.

Most wind-rated doors follow standard commercial metal door sizing conventions and are available in many of the same dimensions.

Common wind-rated door sizes include:

• 36" x 80"

• 36" x 84"

• 36" x 96"

Storefront Door Sizes

Commercial storefront doors are designed for entrances that require visibility, natural light, and a modern appearance. Storefront systems are commonly used in retail centers, restaurants, office buildings, healthcare facilities, schools, and mixed-use developments.

Unlike standard hollow metal doors, storefront door systems offer greater flexibility in sizing.

Common storefront door widths include:

• 24"

• 28"

• 30"

• 32"

• 34"

• 36"

• 42"

• 48"

Storefront doors are frequently configured as single-door entrances, double-door entrances, and entry systems with sidelites and transoms to accommodate larger openings.

Metal Building Door Sizes

Metal building doors are commonly used in warehouses, manufacturing facilities, distribution centers, agricultural buildings, and industrial structures.

The most common metal building door sizes include:

Single Metal Building Doors

• 36" x 84" (3070)

Double Metal Building Doors

• 72" x 84" (6070)

These dimensions are designed to fit standard pre-engineered metal building openings while simplifying installation and reducing field modifications.

How to Measure a Commercial Door

Before ordering a replacement commercial door or specifying a new opening, contractors should verify all dimensions carefully.

When measuring a commercial door, record:

1. Door width

2. Door height

3. Door thickness

4. Frame opening size

5. Rough opening dimensions

6. Door handing and swing direction

Accurate measurements help ensure the selected commercial door size matches the opening and prevents costly delays during installation.