Interior Doors & Trim

Find the perfect door for any room in your home at Northern Building Supply. We have hundreds of high quality options in the latest styles to enhance the aesthetic appeal of any space. Our inventory has something for everyone, from additional sound insulation options to space-saving, trendy barn doors. Looking for bright and bold, or black? We got it. How about the latest in natural wood finishes? We have that too!

Check out all the style options below. Have questions? Give us a call or stop in!

Featured Brand

Interior Doors by

Masonite Interior Doors

Get started choosing your interior doors! Masonite doors are crafted from the highest quality materials and
offer a wide selection of materials, styles, and hardware to perfectly match your style.


Below are a few of the interior door brands that we offer at Northern Building Supply.
Don’t see what you’re looking for? Contact the location nearest you.

Popular Interior Door Styles

Different interior doors have different properties in regards to customization, noise control, and durability with daily use. We carry the popular styles that many
homeowners, remodelers, and builders look for, including solid core, molded hollow core, and stile and rail doors. 


Generally solid wood interior doors are six panel pine, but interior wood doors can be constructed from softwoods and/or hardwoods, such as mahogany, cherry, alder, maple, oak and pine.


Composite wood doors are virtually identical to real wood doors, but are far stronger and more durable. One great advantage is affordability, as composite doors cost less than their solid wood counterparts.


Often the most affordable choice is a hardboard interior door. The hardboard is a fairly soft material, but is usually covered with a hard-baked paint. Hardboard doors can be molded with the look of natural wood grain.


Medium density fiberboard (MDF) is an engineered wood product made from recycled wood fiber and resin. MDF doors come in a variety of styles and are easier to paint than wood doors due to its smooth surface.

Ready to start your project?

Visit one of our showrooms or speak with a designer for a free consultation.