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Standard Interior Door Sizes in Canada (2026 Guide): Dimensions, Rough Openings & Buying Tips
What Is the Standard Interior Door Size in Canada? (2026 Complete Guide)
When planning a home renovation or replacing old doors, one of the first questions homeowners ask is:
What is the standard interior door size in Canada?
Whether you're renovating a home in Toronto, Richmond Hill, Vaughan, Markham, Mississauga, Brampton, Aurora, Newmarket, or anywhere in the GTA, choosing the correct interior door size is essential for a smooth installation. Understanding standard door dimensions can save you time, reduce installation costs, and help you order the perfect pre-hung or slab door.
At RenoProCo, we supply high-quality interior doors across the Greater Toronto Area with fast turnaround times and competitive pricing.
What Is the Standard Interior Door Size in Canada?
The standard interior door height in Canada is:
- 80 inches (6'8")
The standard interior door widths include:
- 18 inches
- 20 inches
- 24 inches
- 26 inches
- 28 inches
- 30 inches
- 32 inches
- 34 inches
- 36 inches
The most commonly installed interior doors in modern Canadian homes are 30", 32", and 36" wide.
Most interior doors are also available in two thicknesses:
- 1-3/8 inch (standard residential)
- 1-3/4 inch (solid core, premium, or taller doors)
Standard Interior Door Size Chart
| Door Width | Typical Use |
|---|---|
| 18" | Small closets |
| 20" | Linen closets |
| 24" | Bathrooms, closets |
| 26" | Small bedrooms |
| 28" | Bedrooms |
| 30" | Standard bedroom |
| 32" | Larger bedrooms |
| 34" | Accessibility upgrades |
| 36" | Master bedrooms, offices, accessibility |
The majority of homes throughout Toronto, Richmond Hill, Vaughan, Markham, Mississauga, Brampton, Newmarket, Aurora, and the GTA use 30", 32", or 36" interior doors.
Standard Interior Door Heights
Most Canadian homes use:
- 80" (6'8")
Newer custom homes often feature:
- 84"
- 90"
- 96"
Taller doors create a more luxurious appearance and have become increasingly popular in modern homes throughout Southern Ontario.
Standard Interior Door Thickness
Canadian interior doors generally come in two thicknesses.
1-3/8" Thick
- Bedrooms
- Bathrooms
- Closets
- Laundry rooms
1-3/4" Thick
- Solid core doors
- Luxury homes
- Improved sound insulation
- High-end renovations
- Doors taller than 80"
Standard Rough Opening Sizes
When installing a pre-hung door, you'll need the correct rough opening.
| Door Size | Recommended Rough Opening |
|---|---|
| 18" × 80" | 20" × 82½" |
| 20" × 80" | 22" × 82½" |
| 24" × 80" | 26" × 82½" |
| 26" × 80" | 28" × 82½" |
| 28" × 80" | 30" × 82½" |
| 30" × 80" | 32" × 82½" |
| 32" × 80" | 34" × 82½" |
| 34" × 80" | 36" × 82½" |
| 36" × 80" | 38" × 82½" |
Always measure your rough opening before ordering a pre-hung door.
Standard Bedroom Door Size
Most bedrooms in Canada use:
- 30"
- 32"
Master bedrooms often use:
- 32"
- 36"
These sizes provide comfortable access while maintaining a balanced appearance.
Standard Bathroom Door Size
Bathroom doors are commonly:
- 24"
- 26"
- 28"
- 30"
Smaller bathrooms may use 24" or 26" doors, while newer homes typically install 28" or 30" doors for improved accessibility.
Standard Closet Door Sizes
Closets often use smaller doors, including:
- 18"
- 20"
- 24"
- Bi-fold doors
- Sliding closet doors
The best option depends on the available wall space and the type of closet.
Pre-Hung vs. Slab Doors
If you're replacing an existing door, you'll need to decide between a slab door and a pre-hung door.
A pre-hung door comes already installed in its frame, making installation easier and ensuring proper alignment.
A slab door includes only the door panel and is best suited for replacing a damaged door while keeping the existing frame.
Learn more in our guide: Pre-Hung vs. Slab Doors: Which One Should You Choose?
How to Measure an Interior Door
- Measure the width.
- Measure the height.
- Measure the thickness.
- Measure the rough opening if replacing the entire frame.
- Check the door swing direction.
Accurate measurements help prevent delays and additional installation costs.
Where to Buy Interior Doors in Toronto & the GTA
If you're looking for premium interior doors in Toronto, Richmond Hill, Vaughan, Markham, Mississauga, Brampton, Aurora, Newmarket, or anywhere in the GTA, RenoProCo offers:
- Solid core doors
- Hollow core doors
- Pre-hung interior doors
- Modern shaker doors
- Fire-rated doors
- Custom door sizes
- Fast local delivery
Browse our collection here:
Frequently Asked Questions
What is the most common interior door size in Canada?
The most common size is 30" × 80", although 32" and 36" doors are also widely used.
What is the standard interior door height?
The standard height is 80 inches (6 feet 8 inches).
What is the standard interior door thickness?
Most residential interior doors are 1-3/8" thick, while premium solid core doors are often 1-3/4" thick.
What rough opening do I need for a 30-inch door?
A standard 30" × 80" pre-hung door typically requires a rough opening of approximately 32" × 82½".
Final Thoughts
Understanding standard interior door sizes makes it much easier to plan your renovation, order the correct products, and ensure a professional installation.
Whether you're replacing one bedroom door or renovating an entire home in Toronto, Richmond Hill, Vaughan, Markham, Mississauga, Brampton, Aurora, Newmarket, or anywhere in the GTA, RenoProCo offers a wide selection of quality interior doors to suit every style and budget.
For more information about Canadian building requirements for residential construction, visit the National Research Council Canada's Codes Canada.
