Walnut Hardwood Lumber

The Crown Jewel of American Hardwood. Walnut Lumber from AB Hardwoods.

There is no domestic hardwood that commands a room the way walnut does. Its deep, chocolate-brown heartwood — rich with streaks of purple, gray, and tan — carries a warmth and visual weight that stops people mid-step. It's the wood that furniture makers dream about, that designers specify for their most important projects, that woodworkers save for the piece they want to be remembered for. At AB Hardwoods, we source and supply American black walnut lumber with the same care and integrity we bring to everything we do — properly dried, honestly graded, and selected for the people who know what exceptional material looks like. Whether you're building a single heirloom piece or specifying walnut across an entire custom home, this is where you start.

Looking for rich, timeless walnut hardwood lumber? From custom furniture and cabinetry to luxury interiors, built-ins, and statement woodworking projects, our walnut lumber is a strong choice for contractors, homebuilders, woodworkers, interior designers, DIYers, and artisans of the craft.

Call or chat with American Born Hardwoods anytime at 800-874-5181 and let us help you choose the right walnut boards for your build.

Who We Serve

Contractors & Homebuilders

Walnut is the specification that sets a custom home apart. Builders who incorporate walnut — in built-ins, stair systems, feature walls, mantels, or millwork — are delivering a material that clients recognize immediately as exceptional. It photographs beautifully, it holds its value, and it tells a story about the quality of the build that no other domestic species can match. Our walnut lumber is kiln-dried and properly graded so your finish carpenters and millwork shops can work with it efficiently and confidently. When your client asks for walnut, AB Hardwoods is the call that delivers.

Woodworkers

For the woodworker, walnut is the species that rewards skill. It machines cleanly on the table saw, jointer, and planer. It routes without tearout when you're with the grain. It carves with a responsiveness that softer species can't offer and harder species won't allow. It glues reliably, holds joinery well, and finishes to a depth and luster that makes every hour of work feel justified. Whether you're building a dining table, a set of chairs, a jewelry box, or a guitar body, walnut gives you a material that's as cooperative in the shop as it is stunning in the finished piece. Our stock is selected for workability — straight grain, consistent moisture content, and honest grading that tells you what you're getting before it hits your bench.

Interior Designers

Walnut is a designer's material in the truest sense. Its color is complex — not simply brown, but a layered, living tone that shifts with the light and deepens with finish. It pairs with everything: warm metals, cool concrete, white walls, dark stone, natural linen. It works in traditional interiors as richly as it does in contemporary ones. A walnut feature wall, a walnut kitchen island, a walnut built-in bookcase — these are the moments in a project that clients photograph and share and remember. We work with designers who need species consistency across large projects and can help you source material that matches in color, grain, and character from room to room.

Do-It-Yourselfers

Working with walnut for the first time is a milestone for any DIYer who takes woodworking seriously. It's more forgiving than its reputation suggests — it machines well with standard tools, sands easily, and finishes beautifully with oil, wax, or a simple wiping varnish. If you're building your first dining table, a set of floating shelves, a cutting board, or a gift that will be used and admired for decades, walnut is the material that makes the project feel significant. AB Hardwoods gives you access to the same quality stock the professionals use, in the quantities that make sense for a single project. We're here to help you figure out what you need and how to get the most out of it.

Artisans & Makers

Luthiers, turners, carvers, knife makers, pen makers, and sculptors — the artisan community has always understood what walnut offers. Its density and stability make it ideal for instrument bodies, tool handles, and turned vessels. Its figure — crotch, curl, burl, and feather — produces some of the most visually spectacular wood available anywhere. A walnut burl bowl, a crotch-figured walnut panel, a curly walnut guitar back — these are objects that transcend craft and become art. We actively source figured walnut for the artisan market and can help you find the piece that matches your vision.

Understanding American Black Walnut

Color & Figure

American black walnut (Juglans nigra) is native to the eastern United States and is one of the most valuable timber trees in North America. Its heartwood ranges from light chocolate-brown to deep espresso, often with streaks of purple, gray, and olive that give individual boards a complexity no two pieces share. The sapwood — the lighter outer wood — is creamy white and is sometimes included intentionally for contrast in contemporary designs. Walnut's grain is typically straight, though figured pieces — curly, crotch, burl, and feather-grain — occur naturally and are prized for their dramatic visual character.

Hardness & Workability

Walnut has a Janka hardness rating of 1010 lbf — moderately hard, placing it softer than oak and maple but harder than cherry and pine. This puts it in a sweet spot for workability: hard enough to hold detail, joinery, and a fine finish, but cooperative enough to work comfortably with both hand tools and power tools. It cuts cleanly, planes smoothly, and carves with a satisfying resistance that tells you the tool is doing exactly what it should. Walnut is also notably stable once properly dried, with low shrinkage values that make it a reliable choice for furniture and millwork that needs to perform across seasonal humidity changes.

Finishing

Walnut is one of the easiest domestic hardwoods to finish. Its moderate, open grain accepts oil finishes — tung oil, danish oil, hardwax oil — with exceptional results, bringing out the depth of color and the complexity of the grain in a way that film finishes sometimes obscure. It also performs beautifully under wiping varnish, lacquer, and water-based polyurethane. One important note: walnut will lighten slightly with UV exposure over time, a process called photodegradation. Many woodworkers and designers consider this natural aging a feature — the wood mellows into a warm, golden-brown tone that is equally beautiful. A UV-inhibiting finish can slow this process if color retention is a priority.

Common Walnut Lumber Thicknesses & Sizes

Walnut lumber is sold in rough-sawn thicknesses measured in quarters of an inch, following the same conventions as all hardwood lumber. Understanding these sizes helps you order the right material and minimize waste.

• 4/4 (1" rough, ~¾" surfaced) — The standard thickness for furniture panels, cabinet doors, drawer fronts, and most general woodworking. The most widely available walnut thickness.
• 5/4 (1¼" rough, ~1" surfaced) — Ideal for tabletops, stair treads, thick panels, and applications where a little extra mass adds visual weight and structural integrity.
• 6/4 (1½" rough, ~1¼" surfaced) — Popular for heavier furniture components, thick slab glue-ups, and millwork where 4/4 isn't quite enough.
• 8/4 (2" rough, ~1¾" surfaced) — The go-to for table legs, turning blanks, tool handles, and structural elements that need real mass.
• 10/4 & 12/4 — Available for live-edge slabs, fireplace mantels, thick countertops, and specialty projects. Ask us about current availability.

Walnut is also available in wide boards — 8", 10", 12", and wider — for tabletops, panels, and live-edge applications where minimizing glue lines is a priority. Wide, clear walnut boards are among the most sought-after material in the domestic hardwood market.

The Feel of Walnut in Your Hands

Pick up a walnut board and you feel it before you see it. There's a density to it — a satisfying weight that communicates quality without a word. Run your hand across a freshly jointed face and feel the smoothness of it, the way the grain is open enough to have texture but fine enough to feel refined. Hold it up to the light and watch the color shift — the way the brown deepens in shadow and warms in direct light, the way a streak of gray or purple catches your eye and then disappears as you move. Smell the fresh-cut surface: earthy, slightly sweet, unmistakably walnut. These are the sensory qualities that make walnut the material woodworkers and designers return to again and again. It doesn't just look exceptional — it feels exceptional at every stage of the work, from the first cut to the final finish.

Why Source Your Walnut from AB Hardwoods?

• American-sourced, traceable material — Our walnut is domestic American black walnut, sourced from managed forests and selected for quality at every step.
• Kiln-dried to industry standards — Properly dried walnut is stable, ready to work, and won't move on you after it's in the project.
• Honestly graded — We grade our walnut clearly so you know what you're buying: FAS (Firsts and Seconds), Select, and #1 Common grades available depending on your application and budget.
• Figured material available — We actively source crotch, curl, burl, and feather-grain walnut for buyers who need something beyond the standard.
• Any quantity, any project — Whether you need a few boards for a weekend project or a full unit for a production run, we treat every order with the same care.

Frequently Asked Questions

What is American black walnut?

American black walnut (Juglans nigra) is a native North American hardwood prized for its rich chocolate-brown heartwood, straight grain, and exceptional workability. It is one of the most valuable domestic timber species in the United States and is widely used for fine furniture, cabinetry, flooring, millwork, gunstocks, and musical instruments. It is distinct from English walnut (Juglans regia), which is primarily a nut-producing tree with lighter-colored wood.

Is walnut a hard or soft wood?

Walnut is a hardwood with a Janka hardness rating of 1010 lbf. This places it in the moderate range among domestic hardwoods — harder than cherry (950) and pine, but softer than red oak (1290), white oak (1360), and hard maple (1450). It is hard enough for furniture, flooring, and millwork applications, while remaining cooperative and enjoyable to work with hand tools and power tools alike.

Does walnut need to be finished?

Walnut does not require a finish to be structurally sound, but finishing is strongly recommended to protect the wood from moisture, UV exposure, and surface wear. An oil finish — such as tung oil, danish oil, or hardwax oil — is the most popular choice for walnut because it penetrates the grain and enhances the natural color and depth without obscuring the wood's character. Film finishes (lacquer, varnish, polyurethane) provide more surface protection and are appropriate for high-use applications like tabletops and floors.

What is figured walnut?

Figured walnut refers to boards that display unusual and visually dramatic grain patterns beyond the standard straight grain. Common figure types include curly walnut (wavy, rippling grain), crotch walnut (feather-like figure from the junction of two branches), burl walnut (swirling, irregular grain from abnormal growth), and feather-grain walnut (a dramatic V-shaped pattern). Figured walnut is rarer and more expensive than standard stock and is prized by furniture makers, luthiers, and artisans for its exceptional visual character.

How do I prevent walnut from fading?

Walnut naturally lightens with UV exposure over time, shifting from its original deep chocolate-brown toward a warmer, golden-brown tone. To slow this process, apply a finish that contains UV inhibitors — many exterior-grade and premium interior varnishes include UV protection. Keeping finished walnut pieces out of direct sunlight and using UV-filtering window film in rooms with significant sun exposure will also help preserve the original color. Many woodworkers and designers embrace the natural aging of walnut as part of the material's character.