Ready to Make Your New Jersey Construction Project a Reality?

New Jersey’s premier building supplies, lumberyard, and kitchen and bath company is here to provide your home with the ultimate upgrade.

Excelsior & Kaslander Lumber Company

The first choice for all your home improvement projects.

What We Offer


Decking & Railing

Add value to your property with a stunning deck and outdoor living space. From Trex and Fiberon to Wolf Decking and Railing Systems and more, we carry an extensive selection of quality products for all your decking and railing system needs.


Lumber & Lumberyards

Choose from our impressive selection of natural and engineered lumber for all your home constructions projects. We offer nothing but the best quality lumber from Boise Cascade and Eastern Engineered Wood Products.


Kitchen & Bath

Upgrade your home to reflect your unique style with our full-service kitchen and bath design solutions. Visit our Butler showroom and get inspired by our high-quality cabinetry and custom-designed L-shaped kitchen islands.


Building Materials

Visit our fully-stocked lumberyard at Butler or Newark, New Jersey, and find all the building materials you need to get the job done. You can also contact us for custom orders!


Tools & Equipment

We have all the tools and equipment you need to finish your DIY home improvement projects. Our Butler and Newark stores are well-stocked with quality products from trusted partners.

Young woman surfing laptop in kitchen

Doors, Windows & Skylights

We stock many popular product lines and do countless custom orders to meet all your project needs. Excelsior Lumber is also a proud Andersen® Excellence Dealer and one of the area’s only Andersen dealers with two Andersen service technicians.

Over 60 Years of Superior Service, Quality, and Professionalism

For over 60 years, Excelsior Lumber Company has aided property owners across New Jersey with all their construction needs. Steeped in the history of New Jersey and well-renowned for our impeccable service, quality products, and knowledgeable staff, Excelsior and Kaslander Lumber Company is the home improvement and construction partner you need to make your vision a reality. We are now conveniently open at two primary locations: Excelsior Lumber Company and Excelsior Kitchen and Bath showroom in Butler and Kaslander Lumber Company conveniently in Newark, NJ. Visit our showrooms today!


“Big box store run around, incompetent help, and unrealistic delivery times—not here! I've been working with Excelsior Lumber long before the impersonal big box stores ever showed up in the area. Excelsior's knowledgeable staff, exceptional personalized service, on-time deliveries, and competitive pricing have kept me coming back, and will keep me coming back for years to come.”

– Andy Esselman of Wayne, NJ.

“I’ve been going to Kaslander Lumber for 33 years. Bob was the first one to take a chance on me and give me credit at 19 years old. When times got tough, they stood by me, and I never forgot that. Sometimes they’re a little more expensive, but the service I get when I walk in there is second to none. Customer service is huge for me. When I walk in there, I feel like I’m part owner. Now I’m at the point where I’m in the top 25 deck installers for Fiberon Decking in the US!”

– Carmine Capriglione of Morris County / Roxbury, NJ.

“I’ve been working with Excelsior for 15 years. The service here is great. All of the sales reps and employees are very personable, and they really know how to take care of their customers.”

– Jason Famularo of Kinnelon, NJ

Latest Blogs

Discover the latest trends in the world of home improvement and renovations.

Trex Announces Outdoor Living Trends For 2022

“While much of what a post-pandemic world will look like long-term remains to be seen, one thing is clear – outdoor living space is more essential than ever,” says Leslie Adkins, vice president of marketing for Trex Company, the world’s largest manufacturer of...

What are the best doors to have installed this winter?

Fiberglass insulated doors, solid wood and metal insulated doors are best for keeping the cold out of your home. Fortunately, Excelsior & Kaslander Lumber Company carries all three despite any shortages the industry is experiencing.  Therma-Tru  Let’s begin with...

Can your home handle the first winter storm?

It’s too early to tell if we will have a white Christmas, but one thing’s for sure: Winter is coming! Do you know if your windows will be able to handle the season’s first storm? Check for leaks  It’s best to check your windows for leaks before the winter starts. If...

Sign Up for Updates

Be the first to learn about the latest tools and products you need to succeed in your next home improvement project!

Join Our Network

Popular Brands

Skip to content