Expert Millwork Solutions for Homes and Commercial Projects in Spearfish
Quality millwork adds the finishing touch to any space—bringing character, function, and lasting value to your project. At Spearfish Building Supply, we offer a wide selection of millwork products including moulding, doors, stair parts, and trim, all carefully selected for their craftsmanship and durability. Whether you’re a builder, remodeler, or homeowner, our expert team is here to help you find the perfect match for your project’s design and budget.
Our products
wood
Natural wood trim delivers unmatched character and richness. Ideal for applications where grain, warmth, and craftsmanship are key.
ENGINEERED WOOD
A great alternative to solid wood, engineered trim offers durability and stability. It resists warping, decay, and pests, while still offering a wood-like finish.
VINYL & PVC
Low-maintenance and long-lasting, PVC trim is easy to work with and great for areas exposed to moisture. It’s also a smart eco-friendly choice.
FIBER CEMENT
Made from a mix of cement, sand, and cellulose fibers, fiber cement trim holds up in any climate. It resists insects, rot, and wear—perfect for both interior and exterior use.
Comprehensive Millwork for Every Phase of the Build
At Spearfish Building Supply, our millwork selection is designed to meet the needs of contractors and DIYers alike—from rough-in to finishing details. We carry both standard profiles and custom solutions to match any style, from classic craftsman to modern minimalist.
Interior Millwork Products
Interior Doors – Choose from molded panel, flush, and solid core wood doors in various sizes and finishes.
Moulding & Trim – Crown, casing, baseboard, chair rail, and accent mouldings available in primed MDF, hardwood, or paint-grade pine.
Stair Components – Treads, risers, handrails, newel posts, and balusters in traditional and modern styles.
Wainscoting & Wall Treatments – Pre-made panels and raw materials to elevate interior detail.
Custom Profiles – Our team can source or replicate profiles to match existing millwork in restoration projects.
Exterior Millwork Products
Exterior Doors – Available in fiberglass, steel, or wood with sidelites, transoms, and customizable glass inserts.
Door & Window Trim – Weather-resistant options built to withstand Black Hills conditions while enhancing curb appeal.
Porch & Column Details – Load-bearing and decorative options to complete the look of exterior entries.
How to Choose the Right Millwork for Your Project
When selecting millwork, consider both function and aesthetics. Start by identifying the architectural style of your home or building—millwork should complement it, not compete with it. From there, think about material choice:
MDF is cost-effective and smooth for paint-grade interior trim.
Hardwoods like oak or maple add durability and warmth in stain-grade applications.
PVC and composites are best for exterior use due to moisture resistance.
If you’re unsure where to start, our in-store millwork experts can help you match the right profiles, materials, and finishes for your project goals.
Millwork for New Construction and Remodels
Whether you’re finishing a new custom home or updating a single room, millwork provides structure and style. We work closely with local contractors and designers across Spearfish and the Black Hills area to ensure millwork selections are cohesive, code-compliant, and delivered on time.
Order Millwork From Your Local Lumber Yard - Spearfish Building Supply!
Visit our Spearfish location to explore our showroom and speak with a knowledgeable team member. We’ll help you plan your millwork needs with accurate measurements, material guidance, and delivery options. Whether you’re doing a full build or a single room upgrade, we’ve got the materials—and the know-how—to help you finish strong.