
When building or renovating a home, doors are a key feature that shapes the look, feel, and functionality of a room. While often overlooked, selecting the appropriate door dimensions ensures smooth operation, adequate space, and a balanced aesthetic. Standard door sizes in Australia typically include widths of 620mm, 720mm, 820mm, and 920mm, with a standard height of 2040mm. However, newer homes with higher ceilings are increasingly adopting 2340mm as the standard height for doorways. External doors are generally thicker than internal doors, with a standard thickness of 40mm, while internal doors are typically 35mm thick.
| Characteristics | Values |
|---|---|
| Standard door height | 2040mm or 2340mm for newer homes |
| Standard door width | 620mm, 720mm, 770mm, 820mm (most common), 870mm, 920mm |
| Minimum door height | 2040mm as per Building Codes of Australia (BCA) |
| Standard door thickness | 35mm-40mm for internal doors, 40mm or more for external doors |
| External door height | 2040mm or 2340mm |
| External door width | 820mm, 920mm, 1020mm, 1200mm |
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What You'll Learn

Standard internal door sizes
The standard internal door size in Australia typically has a width of 820 mm, although widths of 620 mm, 720 mm, 770 mm, 870 mm, and 920 mm are also common. The standard height is 2040 mm, but taller doorways of 2340 mm are becoming more common in newer properties with higher ceilings. The Building Codes of Australia (BCA) sets a minimum door height of 2040 mm to ensure accessibility and functionality.
The thickness of internal doors is typically around 35 mm to 40 mm. However, the thickness may vary depending on the material and style of the door. For example, sliding doors and bi-fold doors often have narrower widths to fit smaller spaces, while custom doors can be made to accommodate specific architectural or design needs.
When choosing a door size, it is important to consider the location and function of the door. For instance, a narrow pocket door may be suitable for a small bathroom, while compact bi-folds could be ideal for a laundry room. Additionally, there may be specific building codes or regulations in your area that dictate minimum door sizes for safety and accessibility compliance, especially in public buildings or areas with accessibility requirements.
It is always recommended to accurately measure your doorway before selecting a door to ensure proper clearance and smooth operation. A small gap of around 2-5 mm around the perimeter of the door is generally recommended to prevent rubbing.
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Standard external door sizes
When building or renovating a home, choosing the right door size is crucial for functionality and aesthetics. Standard door sizes in Australia vary depending on the type of door, location, and purpose. Here is a detailed guide specifically focused on standard external door sizes for Australian homes.
Standard External Door Heights
The most common height for external doors in Australian homes is 2040mm. This standard height ensures compliance with accessibility and functionality requirements. However, some homeowners opt for taller doors, ranging from 2340mm to 2400mm, to create a more grand and majestic entrance. These taller doors are particularly common in newer homes with higher ceilings.
Standard External Door Widths
The standard external door widths in Australia include 820mm, 870mm, 920mm, and 1020mm. The most common width is 820mm, which strikes a balance between providing ample access and maintaining a cohesive look. Some door styles offer an extra-wide option of 1200mm for a statement entrance and improved furniture maneuverability.
Standard External Door Thickness
External doors in Australia are generally thicker than internal doors to enhance security and insulation. The standard thickness for external doors is typically 40mm, although some older homes may have doors with a thickness of 35mm. This added thickness contributes to better insulation and security, making the doors more resilient against extreme weather conditions and unauthorized breaches.
Factors to Consider
When selecting an external door, it is essential to consider specific building codes and regulations and design needs. For areas with accessibility requirements, such as wheelchair access, wider doorways and doors may be necessary. Additionally, the function of the door and the expected traffic flow should be taken into account. High-traffic areas may require wider doors to accommodate the passage of people or large items.
Customization Options
While standard door sizes offer cost-effectiveness and convenience, customization options are also available. Custom doors can be tailored to specific architectural needs or personal design preferences. However, they tend to be more expensive, and the dimensions may need to comply with minimum door size requirements for safety and accessibility.
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Door thickness
The standard door thickness in Australia is 35mm for internal doors and 40mm for entry doors. However, custom doors can be thicker or thinner depending on the specific requirements and design of the property.
Internal doors with a thickness of 35mm are the most common in Australian homes. This thickness is standard across various door types, including
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Custom doors
While standard door sizes in Australia are typically 2040mm in height and 820mm in width, custom doors can be made in a wide range of sizes. If your door openings are a non-standard size, you may need to opt for custom-made doors.
Additionally, some companies allow you to trim down their standard doors to fit your custom needs. Doors Plus, for example, offers doors that can be trimmed down slightly on each edge for a flush fit.
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Door height and width
The standard door height in Australia is 2040mm, but newer homes are increasingly adopting 2340mm as the standard for taller doorways. These dimensions ensure functionality while accommodating evolving architectural trends. The Building Codes of Australia (BCA) sets the minimum door height at 2040mm, ensuring doors are accessible and functional for a broad range of uses.
The standard width of internal doors in Australia typically ranges from 520mm to 920mm, with common widths including 620mm, 720mm, 770mm, 820mm (the most common), 870mm, and 920mm. The width of internal doors can be as narrow as 420mm for smaller spaces. The standard width of external doors in Australia often falls between 820mm and 920mm, with some extending up to 1200mm for grand entrances. The most common external door width is 820mm, but standard widths also include 870mm, 920mm, and 1020mm.
The standard thickness of internal doors in Australia is typically around 35mm to 40mm, while exterior doors might be slightly thicker, ranging from 35mm to 45mm to enhance security and insulation. The standard size for double doors usually ranges between 1200mm and 1600mm in width, with individual door panels measuring from 600mm to 800mm wide, maintaining a standard height of 2040mm.
It is important to note that door sizes may vary depending on their location and purpose. For example, a narrow pocket door may be needed for a small bathroom, or compact bi-folds for a laundry room. Additionally, homes with unique architectural designs may require non-standard door dimensions for specific rooms or hallways.
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Frequently asked questions
The standard door size in Australia is typically 2040mm in height and 820mm in width, with other common widths including 720mm, 770mm, and 870mm.
The typical standard door thickness in Australia is about 35mm to 40mm for interior doors, while exterior doors are generally thicker, ranging from 35mm to 45mm.
The standard external door size in Australia is 2040mm in height and 820mm in width, with other common widths being 920mm and 1020mm.
The Building Codes of Australia (BCA) sets the minimum door height at 2040mm, ensuring doors are accessible and functional.
The standard door size for wheelchair access in Australia is 2040mm in height, 870mm in width, and 35mm in thickness for wide entryways.











































