second pic here

Here is a link that might be useful:

About 8-10,000

Boy, 8K-10K seems high to me, although I realize the new material you want is very ornate. A lot of it depends on whether you are having things custom made or buying off the shelf and how involved it is to install. I could get a few estimates from good carpenters who have done this before. Not sure if you're concerned about resale, but this is something that won't pay for itself, so anything you put in is for your own wow factor.

Thanks very much for the replies. 8-10k does sound higher than I originally expected though I don't have much of an idea.
One thing is that I don't have to have solid wood treads as shown in the second pic. I can leave the steps with carpets and replace the white trims (as circled in the first pic) with new ones so that they fit the new iron rails.
BTW, I'm not a handy person at all. So I'd prefer to have the job done completely by professionals.
Thanks again.

To give you an idea, I had a similar thing done last April (new wood rail and iron balusters), but my staircase is shorter than yours. It all depends on how ornate the balusters you select are and the finish you choose. I went with a simple design in a standard black finish (two simple straight balusters followed by a more ornate one; I didn't want it to be too busy; as it was mentioned earlier, I was afraid that "too busy" would get old after a while and that it would get rapidly out of style). My balusters were however more expensive because they are in a textured finish, instead of a plain finish. The whole job cost 1200$ in material (42 balusters and solid maple hand rail) and 300$ to have them install (but not including varnish; I did this myself). Don't forget that you could keep the same handrail and change only the balusters; this is what they have in the target picture: a wood-iron combo. This is also what I did.

Hope this helps.

Thanks for sharing your experience. It's very helpful and encouraging! I'm curious that in your case, did you also get the new stair brackets (that the bottom part of the baluster is put into)? If not, how did your balusters fit into the holes of the original brackets?

Thanks all for the responses.
I have contacted a stair contractor about replacing the rails only. Got a quote which seems acceptable to me. It's about $20 per rail including both labor and materials. Will keep you updated once I have it done (probably in February).

we are doing several renos and this was one of them the designer sent ppl over they removed handrails sanded those and restained the handrails and the large posts then installed the iron pickets one curvy followed by another curvey with round ball, i have several staircases the cost was 4,800

Ready for a update!