40x100 Steel Building, Northcraft’s Largest C-Channel Footprint
4,000 sq ft clear-span shell at full commercial and ag scale — starting at $39,500, delivered.
50-Year Paint Warranty, 50-Year Rust Perforation Warranty, 60-Year Structural Warranty, and Lifetime Warranty on Hardware — all transferable to the next property owner.
Get Your Customized Quote
- No obligation — we’ll send the price, not a salesperson to your door.
- Engineered drawings stamped for your state.
- 60-Year Limited Structural, 50-Year Limited Paint, 50-Year Limited Rust Perforation, and Lifetime Limited Hardware warranties.
- Delivered nationwide, all 50 states.
C-Channel Clear Span • 40’ Wide, No Interior Posts • 60yr Limited Structural Warranty • Nationwide Delivery
40x100 Steel Building Price
$39,500 and up
C-channel framing, 10’ eave height basis, standard snow and wind loads.
Included
- • Stamped, engineered building drawings for your state
- • All primary building components
- • Freight to your site
Not included
- • Doors and windows
- • Insulation
- • Concrete or foundation work
- • Erection
Building specs
- • Framing type: C-channel solid frame, 10-16 gauge steel
- • Roof / wall panels: 26-gauge and heavier available
- • Roof pitch: Up to 8/12
- • Coating: Galvalume AZ55 on all primary and secondary framing
- • Hardware: Stainless steel hardware with a neoprene washer
- • Trim package: Full trim package included
What moves the price
- • Eave height above the 10’ basis
- • Ground snow load above 35 psf
- • Wind load above 110 mph
- • Areas with high seismic activity
This is a starting price, not a binding quote — your exact number depends on your state’s code requirements, site conditions, and what the building has to carry. We confirm the real number with stamped engineering before you sign anything.
What a 40x100 Footprint Actually Looks Like
Drawn to scale from the same specification the price above comes from. Door, window and interior layout aren’t shown because every Northcraft building is engineered to your plan — what’s fixed at this size is the footprint, the clear span and the eave height.
What Fits in a 40x100 Footprint
4,000 square feet, clear span, no interior columns — the largest building Northcraft currently prices in C-channel framing.
Large Commercial Warehouse
4,000 square feet of clear-span floor for a full warehouse or distribution operation, still with zero interior columns across the 40-foot width.
Full-Scale Ag Operation
Enough length to combine hay storage, equipment parking, and a livestock or work area in one building instead of several smaller ones.
Multi-Bay Fleet or Distribution Building
Room for a real commercial fleet plus a loading and staging area, laid out however your operation actually flows.
Light-Industrial Manufacturing Space
A full production line, staging, and shipping under one roof — Northcraft's largest currently-priced C-channel building.
Using a 40x100 as a Shop
4,000 square feet, the longest footprint Northcraft builds in C-channel at a 40-foot clear span. This is commercial-scale floor area: fleet storage, a production run, or a contractor yard consolidated under one roof.
Freight is a real consideration at this length — the package is substantial and the delivery route matters. Confirm site access and staging room with your estimator early, especially on narrow rural approaches.
Two things worth settling before engineering rather than after, because both are far cheaper to change on paper:
- Site access for the delivery. A 100-foot package is a substantial freight load. Confirm the approach, turning room and staging area with your estimator before you order, especially on narrow rural roads.
- Collateral load, if anything will hang from the frame. A crane, mezzanine or sprinkler system changes the frame rather than being added to it. It belongs in the conversation before engineering starts.
The Cheapest Square Feet Left in Northcraft’s C-Channel System
Getting here from 40x80 costs $7.25 for each additional square foot gained — not the full $39,500 sticker price divided across all 4000 square feet, but the real marginal rate on just the last 800 square feet. That’s in line with what every earlier step in the 40-foot family has cost per added square foot, which is the practical case for maxing out length here before looking elsewhere: within C-channel, extra room has stayed cheap and consistent all the way to the ceiling.
The next step past this size looks different. Moving to 50x100 — wider as well as longer, and a change of frame system — runs $10.10 for each additional square foot gained, noticeably steeper than anything inside the C-channel range. See the FAQ below for what that means if you’re planning to outgrow this footprint eventually.
4000 square feet — Northcraft’s largest C-channel footprint — is a substantial commercial pour, priced against the stamped drawings. Foundation work is priced separately from the building price and available on request. Freight ships across multiple truckloads; plan staging space and delivery timing with your estimator well before production completes.
What a 100-Foot Wall Actually Allows for Openings
A wall this long isn’t limited to a single opening the way a 24- or 40-foot wall effectively is. There’s real room to space multiple dock or drive-through doors along the 100-foot run, each aligned to its own interior zone — a loading dock at one end, a separate vehicle or equipment entrance further down, without the openings crowding each other or the corners. Exactly how many, and where, is a real engineering placement question for your drawings, not a fixed number — but the length itself is what makes multiple independent zones with their own access realistic here in a way it isn’t on Northcraft’s shorter sizes.
Backed By Real Warranties
YEAR LIMITED PAINT WARRANTY
YEAR LIMITED RUST PERFORATION WARRANTY
YEAR LIMITED STRUCTURAL WARRANTY
LIMITED HARDWARE WARRANTY
All four warranties are transferable to the next property owner. Every building ships with code-compliant stamped engineering for the delivery state.
* Warranty coverage is subject to applicable warranty terms, conditions, limitations, and exclusions. Complete warranty details are provided during the purchase process and included within the applicable purchase documentation.
Frequently Asked Questions
What does a 40x100 steel building cost?
Northcraft's published floor for a 40x100 is $39,500, delivered, at a 10-foot eave height with standard loads (ground snow to 35 lb, wind to 110 mph). That covers stamped engineering drawings, the building components, and freight — not doors, windows, insulation, concrete, or erection.
How much does a concrete slab cost for a 40x100 metal building?
Northcraft prices foundation work separately (that service is available — ask for it in your quote request) and doesn't publish a slab price - a figure that's right in one county is wrong in the next. For 4,000 square feet, what moves it is local: frost depth, how level your pad already is, delivery distance, reinforcement and finish. Get two or three local quotes for 4,000 square feet with a thickened perimeter where the building anchors down. Your stamped drawings include the anchor-bolt layout your concrete contractor needs, and we send it to them directly.
Is a 40x100 metal building the same as a 40x100 steel building?
In everyday use, yes — most buyers say "metal building" and "steel building" interchangeably, and we answer to both. The distinction worth caring about is the frame, not the word. A solid frame like the C-channel in a 40x100 is a different structure from a hollow tube frame, which is what most of the cheapest advertised carport-style buildings use. Two buildings can both be sold as a "40x100 metal building" and not be comparable products.
Is a 40x100 still C-channel, or does a building this size need I-beam?
It's still C-channel, and it's the largest C-channel footprint Northcraft currently prices. Width decides frame type, not floor area — 40 feet is the widest clear span Northcraft builds in C-channel, and length simply extends at that same span. Going wider than 40 feet, not longer, is what would move a project to I-beam framing and Northcraft's separate I-beam price basis.
Do I need a permit for a 40x100 steel building?
Most jurisdictions require a permit for a structure this size, and a commercial-scale building this large often triggers additional review. We provide the stamped engineering drawings your local building department will ask for.
Can I customize the building, or is 40x100 a fixed size?
Every Northcraft building is fully customized to your exact specifications — this isn't a catalog of fixed sizes. Bring your own dimensions, door and window placement, and requirements, and we'll engineer to those specs instead of a preset.
What's included in the price, and what isn't?
Included: stamped engineered drawings for your state, every structural and panel component, and freight to your site. Not included: doors and windows, concrete or foundation work, and erection — priced separately; those services are available. At this scale, plan your dock doors, man doors, and any interior build-out with your estimator before finalizing the configuration.
What loads does the $39,500 floor assume, and what raises it?
The floor is based on ground snow load up to 35 lb per square foot and wind speed up to 110 mph. Eave height above the 10-foot basis, higher snow or wind ratings, and high seismic activity all move the price. C-channel buildings like this one typically don't carry collateral load — if your use involves a crane, mezzanine, or sprinkler system, tell us and we'll confirm whether that changes anything at this scale.
Do I need a professional erector for a 40x100 building?
Yes. At this scale, professional erection with crane support is the standard path — this is not a DIY-scale project the way Northcraft's smaller sizes can be.
Can I finance a 40x100 steel building?
Northcraft does not broker or arrange financing. At this scale, buyers typically use commercial financing, SBA loans, or ag lending depending on the use case — ask your estimator what's worked for other buyers in your situation.
How long does a 40x100 building take from order to delivery?
Typically 45-60 days from order to delivery, depending on engineering review and current production volume. Your estimator confirms a real date range once your drawings are finalized.
If I outgrow a 40x100, is it cheaper to add a second building or move to I-beam?
That's a real question worth running past your estimator with your actual numbers, but the pattern on Northcraft's own price list points one direction: extending length within C-channel has held to a fairly consistent marginal cost per additional square foot at every step on this list, while the jump to 50x100's I-beam scale runs noticeably higher per added square foot (see the comparison above). A second 40-wide building, or a longer one if your site allows it, tends to add space more cheaply than a jump to a wider frame system — assuming 40 feet of width still covers what you need.
Get Your 40x100’ Customized Quote Today
Starting at $39,500, delivered and engineered for your state. No obligation.
Call: (888) 460-9294 | Email: Estimating@Northcraftsteel.com
Get Your Customized Quote