Building Materials, Lumber
& Engineered Wood—Delivered Fast.
Trusted by builders, contractors, and homeowners across the Treasure Valley.
Get the materials you need, when and where you need them.
Your Local Lumber
& Building Store
Building Materials, Lumber
& Engineered Wood—Delivered Fast.
Trusted by builders, contractors, and homeowners across the Treasure Valley.
Get the materials you need, when and where you need them.
Your Local Lumber
& Building Store
Building Materials, Lumber
& Engineered Wood—Delivered Fast.
Trusted by builders, contractors, and homeowners across the Treasure Valley.
Get the materials you need, when and where you need them.
Your Local Lumber
& Building Store
Building Materials, Lumber
& Engineered Wood—Delivered Fast.
Trusted by builders, contractors, and homeowners across the Treasure Valley.
Get the materials you need, when and where you need them.
Your Local Lumber
& Building Store
Closed until: Wed 7:30 AM - 5:30 PM
Delivery Calculator
After a thorough quality check, every order is either loaded by hand into your rig or delivered straight to your site — with low delivery fees and free delivery available in many areas once minimums are met.
Boise
Treasure Valley
Cascade
Donelly
Idaho City
Garden Valley
Pine
Sun Valley
McCall
Garden Valley
Our Mission
Since 1905, we've been proud to serve our community with quality lumber, building materials, and hardware. Rooted in tradition and built on trust, our mission is to support builders, homeowners, and craftsmen with dependable products, knowledgeable service, and a commitment to helping our neighbors build with confidence and care.
Since 1905, we've been proud to serve our community with quality lumber, building materials, and hardware. Rooted in tradition and built on trust, our mission is to support builders, homeowners, and craftsmen with dependable products, knowledgeable service, and a commitment to helping our neighbors build with confidence and care.
Since 1905, we've been proud to serve our community with quality lumber, building materials, and hardware. Rooted in tradition and built on trust, our mission is to support builders, homeowners, and craftsmen with dependable products, knowledgeable service, and a commitment to helping our neighbors build with confidence and care.
Our Products
Our Products
Everything from structural lumber to fine finish trim — available by the foot, in-stock, and job-site ready.
Everything from structural lumber to fine finish trim — available by the foot, in-stock, and job-site ready.
Plywood & OSB
Trusted sheathing and subfloor solutions — available in a variety of thicknesses and grades.
3 / 8
7 / 16
5 / 8
3 / 4
7 / 8
1 - 1 / 8
Zip
CDX
+ more
Dimensional Lumber
Available in rough sawn or surfaced finish with custom lengths and grades — cut by the foot, with minimal waste.
2 x 4
2 x 6
2 x 8
2 x 10
2 x 12
4 x 4
8 x 8
+ more
Trim
Finish your project right with a wide selection of base, casing, and specialty profiles for interior or exterior use.
Exterior
Interior
Base
Casing
+ more
Siding
Choose from top brands like LP, Hardie, and Allura in multiple textures, finishes, and cedar styles.
LP
Hardie
Allura
Cedar
Cottage Lap
Beveled
+ more
Sheetrock & Drywall
Standard and mold-resistant drywall in common sizes — ready for pickup or delivery across the Treasure Valley.
1 / 2
5 / 8
4 x 8
5 x 12
Mold
+ more
Lumber Species
Stocked pine, fir, cedar, and redwood — perfect for framing, finish work, and custom applications.
Pine
Fir
Cedar
Redwood
+ more
Hardware & Fasteners
Fasteners sold by the piece or pound — plus brackets, hangers, and more for any build.
Fasteners
Hangers
Adhesives
Connectors
+ more
Engineered Beams
Code-approved LVL, Glulam, and I-Joist beams built for strength, long spans, and structural consistency.
LVL
Glulam
I-Joist
+ more
Posts & Timbers
Pressure-treated timbers in popular dimensions — ideal for fences, barns, decks, and large-scale framing.
4 x 4
6 x 6
8 x 8
6 x 12
+ more
Trusses
Made-to-order roof trusses — scissor, gable, or hip — ready for pickup or job site delivery.
Scissor
Gable
Hip
Made-to-Order
+ more
Doors & Windows
Interior and exterior doors from trusted brands — ask about custom sizing and upgrade options.
Interior
Exterior
Custom Options
+ more
Special Orders
Need something specific? We source hard-to-find materials and custom millwork to keep your project moving.
Interior
Exterior
Custom Options
+ more
Plywood & OSB
Trusted sheathing and subfloor solutions — available in a variety of thicknesses and grades.
3 / 8
7 / 16
5 / 8
3 / 4
7 / 8
1 - 1 / 8
Zip
CDX
+ more
Plywood & OSB
Trusted sheathing and subfloor solutions — available in a variety of thicknesses and grades.
3 / 8
7 / 16
5 / 8
3 / 4
7 / 8
1 - 1 / 8
Zip
CDX
+ more
Dimensional Lumber
Available in rough sawn or surfaced finish with custom lengths and grades — cut by the foot, with minimal waste.
2 x 4
2 x 6
2 x 8
2 x 10
2 x 12
4 x 4
8 x 8
+ more
Dimensional Lumber
Available in rough sawn or surfaced finish with custom lengths and grades — cut by the foot, with minimal waste.
2 x 4
2 x 6
2 x 8
2 x 10
2 x 12
4 x 4
8 x 8
+ more
Trim
Finish your project right with a wide selection of base, casing, and specialty profiles for interior or exterior use.
Exterior
Interior
Base
Casing
+ more
Trim
Finish your project right with a wide selection of base, casing, and specialty profiles for interior or exterior use.
Exterior
Interior
Base
Casing
+ more
Siding
Choose from top brands like LP, Hardie, and Allura in multiple textures, finishes, and cedar styles.
LP
Hardie
Allura
Cedar
Cottage Lap
Beveled
+ more
Siding
Choose from top brands like LP, Hardie, and Allura in multiple textures, finishes, and cedar styles.
LP
Hardie
Allura
Cedar
Cottage Lap
Beveled
+ more
Sheetrock & Drywall
Standard and mold-resistant drywall in common sizes — ready for pickup or delivery across the Treasure Valley.
1 / 2
5 / 8
4 x 8
5 x 12
Mold
+ more
Sheetrock & Drywall
Standard and mold-resistant drywall in common sizes — ready for pickup or delivery across the Treasure Valley.
1 / 2
5 / 8
4 x 8
5 x 12
Mold
+ more
Lumber Species
Stocked pine, fir, cedar, and redwood — perfect for framing, finish work, and custom applications.
Pine
Fir
Cedar
Redwood
+ more
Lumber Species
Stocked pine, fir, cedar, and redwood — perfect for framing, finish work, and custom applications.
Pine
Fir
Cedar
Redwood
+ more
Hardware & Fasteners
Fasteners sold by the piece or pound — plus brackets, hangers, and more for any build.
Fasteners
Hangers
Adhesives
Connectors
+ more
Hardware & Fasteners
Fasteners sold by the piece or pound — plus brackets, hangers, and more for any build.
Fasteners
Hangers
Adhesives
Connectors
+ more
Engineered Beams
Code-approved LVL, Glulam, and I-Joist beams built for strength, long spans, and structural consistency.
LVL
Glulam
I-Joist
+ more
Engineered Beams
Code-approved LVL, Glulam, and I-Joist beams built for strength, long spans, and structural consistency.
LVL
Glulam
I-Joist
+ more
Posts & Timbers
Pressure-treated timbers in popular dimensions — ideal for fences, barns, decks, and large-scale framing.
4 x 4
6 x 6
8 x 8
6 x 12
+ more
Posts & Timbers
Pressure-treated timbers in popular dimensions — ideal for fences, barns, decks, and large-scale framing.
4 x 4
6 x 6
8 x 8
6 x 12
+ more
Trusses
Made-to-order roof trusses — scissor, gable, or hip — ready for pickup or job site delivery.
Scissor
Gable
Hip
Made-to-Order
+ more
Trusses
Made-to-order roof trusses — scissor, gable, or hip — ready for pickup or job site delivery.
Scissor
Gable
Hip
Made-to-Order
+ more
Doors & Windows
Interior and exterior doors from trusted brands — ask about custom sizing and upgrade options.
Interior
Exterior
Custom Options
+ more
Doors & Windows
Interior and exterior doors from trusted brands — ask about custom sizing and upgrade options.
Interior
Exterior
Custom Options
+ more
Special Orders
Need something specific? We source hard-to-find materials and custom millwork to keep your project moving.
Interior
Exterior
Custom Options
+ more
Special Orders
Need something specific? We source hard-to-find materials and custom millwork to keep your project moving.
Interior
Exterior
Custom Options
+ more
Lumber & Trim by the Foot.
Less Waste, Time Saved.
Lumber & Trim by the Foot.
No Waste, No Guesswork.
Order only what you need — from 2x2s to redwood siding, with precise cuts and minimal waste on every job.
Order only what you need — from 2x2s to redwood siding, with precise cuts and minimal waste on every job.
Trusted by Pros in the Treasure Valley
Why Contractors Choose Us 🪜
Why Builders Choose Us
Why Contractors Choose Us 🪜
Locally Owned Since 1905
A century of trusted service, rooted right here in the Boise community.
A century of trusted service, rooted right here in the Boise community.
On-Time Delivery Guarantee
Materials arrive on time, every time — no delays, no excuses.
Materials arrive on time, every time — no delays, no excuses.
Stock + Specialty Order
From framing stock to custom siding and millwork — most special orders ready in a week.
From framing stock to custom siding and millwork — most special orders ready in a week.
Need a custom order or fast turnaround?
Follow Capital Lumber
Follow Capital Lumber
Follow us on Instagram for behind-the-scenes updates, real project inspiration, and the latest arrivals at the yard.
Follow us on Instagram for behind-the-scenes updates, real project inspiration, and the latest arrivals at the yard.
FAQs
Frequently Asked Questions
Answers to common questions to help you understand the process and how we can work together
Answers to common questions to help you understand the process and how we can work together
Do you offer delivery?
Yes — we deliver across the Treasure Valley and beyond, including Cascade, Donnelly, McCall, Idaho City, Garden Valley, Pine, and Sun Valley. Free delivery may be available on qualifying orders.
Can I return unused materials?
Do you sell lumber by the foot?
Do you help load orders?
What if I visit after hours?
Do you offer delivery?
Yes — we deliver across the Treasure Valley and beyond, including Cascade, Donnelly, McCall, Idaho City, Garden Valley, Pine, and Sun Valley. Free delivery may be available on qualifying orders.
Can I return unused materials?
Do you sell lumber by the foot?
Do you help load orders?
What if I visit after hours?
Do you offer delivery?
Yes — we deliver across the Treasure Valley and beyond, including Cascade, Donnelly, McCall, Idaho City, Garden Valley, Pine, and Sun Valley. Free delivery may be available on qualifying orders.
Can I return unused materials?
Do you sell lumber by the foot?
Do you help load orders?
What if I visit after hours?
Have a question? Ready for a quote? Let’s talk!
Prefer a Instant Quote?
Skip the long form — most quotes take just one quick call.
Get pricing, availability, and next steps in under 15 minutes.
Average Quote: 15 minutes
Average Quote: 15 min
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