How to Build Deck Stairs Around a 90 Degree Corner

Are you looking to build deck stairs around a 90 degree corner? If so, then you’ve come to the right place. Building deck stairs around a 90 degree corner can be a tricky task.

If you’re looking to create a beautiful and unique deck for your backyard, one of the best options is to build stairs around a 90 degree corner. This will help create an aesthetically pleasing and eye-catching focal point that can be used as part of your overall landscaping design or just simply as decoration. While taking on such a challenge might seem intimidating, it’s actually not too difficult when approached step-by-step.

How to Build Deck Stairs Around a 90 Degree Corner

With the right tools and preparation, you can learn how to assemble this striking deck project with confidence. Read on for tips on how to build deck stairs around a 90 degree corner!

Why is It Important to Consider Building Deck Stairs Around a 90 Degree Corner?

When you’re looking for a way to add interest and sophistication to your backyard, building deck stairs around a 90 degree corner is a great option. Not only does it look more appealing than having straight stairs, but it also creates an interesting contrast that stands out against the surrounding landscape. Additionally, when you have guests over, this type of stair design can help to create a pleasant and inviting atmosphere.

The process of building deck stairs around a 90 degree corner may seem daunting at first; however, once you get going with your project, you’ll be pleasantly surprised by how easy it really is. Most importantly, take your time and make sure that each step is done correctly and securely so that your structure will last for years to come.

What Will You Need?

Before you begin the process of how to build deck stairs around a 90 degree corner, make sure that you have all the materials and tools that you need. These are the followings:

  1. Wooden boards
  2. Tape measure
  3. Circular saw
  4. Hammer and nails
  5. Level
  6. Lumber for supports
  7. Concrete mix
  8. Angle grinder
  9. Drill and bits
  10. Safety goggles, gloves, and ear protection

Once you have all the necessary items, you’re ready to get started!

10 Easy Steps on How to Build Deck Stairs Around a 90 Degree Corner

Step 1. Measure the Height:

Before you start to build the stairs, measure how high your deck is from the ground. This will help you determine how many risers (steps) you need to build. Be careful to measure accurately so that each stair is level and even.

Measure How High Your Deck is From the Ground

Step 2. Cut the Stringers:

The stringers are the support beams that will hold up your stairs. To create a 90 degree corner, you’ll need to cut the angles of your stringers at 45 degrees. This will ensure that the stairs make a nice sharp corner. If you’re unsure how to cut these angles, be sure to check out online tutorials or ask a professional.

Step 3. Attach Stringers:

Attach the stringers to your deck using nails or screws, making sure that they are securely in place. This is an important step as it creates a sturdy foundation for the stairs. Ensure that your stringers are level so that the stairs will look even and professional.

Step 4. Cut and Attach Risers:

Once you’ve attached the stringers, it’s time to cut and attach the risers, which are the vertical pieces of wood between each stair. Make sure that their lengths match up with how many steps you decided on in Step 1 and that they are level and even. Secure them into place with nails or screws.

Step 5. Create Support:

You will need to create support beneath each step so that your stairs remain sturdy upon completion. Cut lengths of lumber that are slightly shorter than the risers, then nail them into place directly below each step.

Step 6. Prepare Concrete:

Mix the concrete according to the instructions on the package and spread it out evenly beneath your stairs. This will provide further support for your structure so that it can handle more weight over time. Additionally, it will help to prevent the wood from rotting or becoming damaged by water.

Prevent the Wood From Rotting

Step 7. Finish Risers:

Attach a piece of wood to each riser to create a finished look. Sand down any rough edges, then paints or stain as desired! Remember to wear protective goggles and gloves when working with wood.

Step 8. Cut Treads:

Once you’ve completed all the previous steps, it’s time to cut the treads, which are the horizontal pieces of wood at each step. They should be slightly shorter than the risers so that your feet don’t get stuck when walking up or down the stairs.

Step 9. Attach Treads:

Securely attach each tread to the support beams with nails or screws, ensuring that they are level and even. This is an important step as it provides stability for your structure and will prevent people from tripping on uneven steps in the future. Moreover, it will make your stairs look professional and neat.

Step 10. Enjoy:

Congratulations! You have successfully completed building deck stairs around a 90 degree corner! Now all that’s left is to admire your masterpiece and enjoy how it enhances your outdoor space. Be sure to take pictures of your finished project so you can show it off to friends and family!

Following these ten easy steps will guarantee a successful build of deck stairs around a 90 degree corner project. With the right materials, tools, and knowledge, you can easily construct a beautiful set of stairs on your deck in no time. Just remember to take safety precautions and follow the steps above for the best results!

Successfully Completed Building Deck Stairs

5 Additional Tips and Tricks

  1. When constructing the stairs, make sure the angle of each step is consistent with the angle at which it will be connected to the corner. This prevents an uneven or awkward transition.
  2. For a more seamless look, cut each tread to fit the corner precisely and then use wood glue and nails to attach it in place.
  3. If necessary, add extra support posts or brackets at the corner of your stairs to prevent sagging or instability over time.
  4. When attaching your stair railing, make sure it is firmly attached at both ends of the rail as well as wherever it meets the corner post. This will ensure stability and safety when using your stairs.
  5. Finally, be sure to seal all exposed surfaces with a weather-resistant sealant or paint to protect them from moisture damage over time. Doing this now will help you enjoy your new deck stairs for years to come.

By following these tips, you can easily and successfully build deck stairs around a 90 degree corner. With the right materials, tools, and knowledge, anyone can create a beautiful outdoor space with safe and secure stairs.

5 Things You Should Avoid

1. Making the Stairs Too Steep: When building deck stairs around a 90 degree corner, ensure your stairs are not too steep. This can be dangerous and slippery for anyone using the stairs.

2. Not Measuring Twice: Measuring twice is important when constructing any type of stairs — especially around a 90 degree corner. Check your measurements multiple times before cutting to ensure accuracy and safety.

3. Skimping on Materials: Quality materials will last longer, so don’t skimp out on quality materials when constructing your deck stairway around a 90 degree corner.

4. Ignoring Safety Regulations: Ensure you follow all safety regulations and local codes when building your deck stairway. Some localities may require inspections, so check to ensure you’re up-to-code.

5. Procrastinating: Don’t put off the construction of your deck stairs around a 90 degree corner — start immediately and make sure you follow through! The longer you wait, the more likely it is that something can go wrong or be forgotten. Get started as soon as possible.

Ultimately, building deck stairs around a 90 degree corner are not easy and should not be taken on without proper knowledge and expertise. Research how to do it properly before taking on this project, and always keep safety first!

Construction of Your Deck Stairs


Building deck stairs around a 90 degree corner is a challenging project, but with the right information and preparation, it can be done successfully. With careful planning, precision measurements, and assembly, you can create a stunning deck stairway that will make your outdoor space look amazing. 

While this kind of work isn’t for everyone, having the knowledge and skills necessary to build deck stairs around a ninety-degree corner is invaluable and gives you the power to design one of a kind creations according to your preferred taste.

All in all, by following these steps as outlined herein, you have all the tools you need to complete this task with skill and finesse from beginning to end.

Hopefully, the article on how to build deck stairs around a 90 degree corner has provided you with the help and guidance you need to embark on this project. Good luck!

You Can Check It Out to Make a Curved Deck

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Adrian Green

Adrian has been interested in woodworking since he was a child. His father had a woodworking shop, and Adrian would help him out and learn from him. He gained basic carpentry knowledge as well as an understanding of how to work hard and take care of business. He enjoys woodworking as a hobby. He loves the feeling of creating something with his own hands, and the satisfaction that comes from seeing his finished products used by others. So he started this blog to spread his passion and knowledge to those interested in DIY wood-working projects. He knows that with a little guidance and practice, anyone can create beautiful pieces of furniture or décor from scratch.

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