Welcome to Stair Parts Unlimited

We would like to welcome you to our site, please feel free to browse with comfort. We are your one stop shop for all your stair needs. We have other products and services that may not appear on site yet so don't hesitate to give us a call with any of your questions.


Custom work for the Customer
Custom railings are "our specialty!"

Mark D. Bilger knows what it takes to satisfy customers. His custom work has made a lasting impression for over 25 years in many homes in the Lehigh Valley area. Mark specializes in curved stairs, wood and metal balusters and fine custom woodworking.

Custom built stairway with wrought iron balusters.

We retail stair parts, railings, stairs, columns and trim. We make & install stair tread replacement covers, cabinets & make custom cabinetry, raised panels for offices or dining rooms.  Our inventory
is available to builders, subcontractors and homeowners who like to do their own projects.

The product list contains some of the colors & items  available. We purchase from many suppliers so we can get almost any item available. Call to visit our showroom, or get more information.

Looking to replace those carpet stairs with wood?We can do that with our tread covers!!

What is a wood tread cover?

These are desinged to turn your carpet stairs into beautiful hardwood looking stairs without replacing the whole staircase.

These are made of solid 1/2" thick wood, no veneer or plywood, which is the same thickness of your carpet so nothing will change in height of the tread.  As to many others that are 3/4" to 1 inch thick which may change code laws - these are all custom made to fit your stairs in multiple wood species and come unfinishe or pre-finished.

Risers are made from 5/16" thick solid wood, no veneer or plywood, to help keep stair tread and riser the same as the carpet thickness and come unfinished or pre-finished.

Designed for a DIY self project or contractor.

Call for more details or fill out a quote.