monika2024 I did something similar to this.. very easy just layers of moulding:
• Cut MDF (or you can you 1x10 & 1x12 or whatever the width you'd like to use-wider on bottom
• Cut tall base moulding and attach around bottom
• cut smaller base molding (for the middle portion on the vertical column) and attach one upside-down to the wider, and one right side up to the upper portion so that the ends meet up- get chair rail moulding and attach to the two base moulding mentioned-the chair rail will cover up where the two base moulding meet
• cut small crown moulding and attach to top of column/pillar just like you would to a ceiling.
• Cut a piece of mdf/wood to cover the top of that crown moulding just attached (otherwise it'll collect dust in there)

For the header:
• Cut 1x12 for top horizontal header
• Cut and attach picture moulding to the bottom of the header
• Cut and attach large crown moulding to the top of header
• cut and attach piece of mdf/wood to cover top of large crown moulding

Go to a lumber yard or big box stores and check out the moulding to see what you like and sketch it out. Here's a pic of a close up to a similar header top :
https://lh5.googleusercontent.com/-3KZV44sd1I0/T79tJECxfCI/AAAAAAAAUxU/6jVnVF760ng/s512/DSC_0190.jpg

And here's a close up of the middle of the column that's similar:
https://lh3.googleusercontent.com/-lThNxLuMoDY/UF45wOQYiSI/AAAAAAAAVN4/VY-M0FkzJTg/s512/20120916-_DSC2469_HDR_FPT-2.jpg

Elaine Del Valle What is this staircase made of?

Elaine Del Valle whats the railing made of?

Jeff King & Company One of a kind, manufactured for this job specifically.

sara_sens Can you tell me who manufactured the railing?Thanks.

laurenahorn Still working on finding someone in rural northern ireland to at least get the look of your fabulous staircase. Have had to compromise with the addition of newel posts for strength and recreate the tuning forks in wood. Building Regulations over here don't allow a gap bigger than 100mm anywhere which is causing more issues. Was the shallow handrail a design decision?The whole staircase proportion seem just perfect to me but I keep being told a deeper handrail with a thumb groove is 'safer'.

Walk On Wood We usually clad a plywood structure with solid material mitred together, its a great look!