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.



Step 1: Look beyond the windows Sometimes it is easier to simply take a step back. Ask yourself what you really want to do with your home — not just with your windows, but with your home. What experiences do you want to create? For example: Do you want to let in more...
Kitchen with windows as backsplash

Windows as Backsplashes

Trends in backsplash designs tend to come and go. The always popular subway tile is frequently reintroduced in different colors and sizes, and in different patterns with varying shades of grout. But what if the whole idea of a backsplash was completely reimagined? And...
Carpenter building wooden deck

Why Building a New Deck in the Fall is the Best Time of Year

It’s time to say goodbye to summer, but did you know that fall is the best time of year to build a new deck? We compiled a list of three reasons why you should consider building a deck this season. Availability It’s “off-season” for many builders so you can beat the...

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