Skip to main content
Steel storage building with a roll-up door and covered area, surrounded by green trees
SKU: GB1815Up to 43% Off

24x40x12 Building with One Side Lean-to

Starting at$16,319*Final prices vary by location and customization options.
Free delivery & installDesign in 3D →

*Accessories shown are not included in the base price.

Width
24'
Length
40'
Height
12'
Roof
Vertical
(888) 234-0475Call Now
  • 20-year rust-through warranty
  • Financing & RTO Available
  • BBB A+ Accredited
  • Since 1997 · 100K+ buildings

Check Your Area

Delivery, certifications & load requirements

Overview

About the 24x40x12 Building with One Side Lean-to

Need enclosed storage plus covered outdoor space? This 24x40x12 Metal Garage with a 12x40 Lean-To combines the security of a fully enclosed garage with the flexibility of an attached covered shelter, making it one of the most versatile building configurations available.

The main garage provides 960 square feet of enclosed storage, while the attached 12x40 lean-to adds an additional 480 square feet of covered space, bringing the total covered area to approximately 1,440 square feet.

Built with a durable 14-gauge galvanized steel frame and engineered to withstand 140 MPH winds and 35 PSF snow loads, this structure is designed for long-term performance in demanding weather conditions. The fully enclosed garage features a 10'x10' roll-up garage door for easy access to vehicles, equipment, trailers, and machinery.

The attached lean-to is ideal for RV parking, boat storage, tractors, utility trailers, firewood storage, outdoor workspaces, or additional vehicle parking. This combination allows you to protect valuable assets while maximizing your usable space without the cost of a larger fully enclosed building.

Finished in attractive Galvalume with Evergreen roofing and trim, this building delivers both durability and curb appeal for residential, agricultural, and commercial applications.

Delivery and professional installation are included. Call now.

  • Vertical roof built to local code3/12 pitch sheds rain and snow fast.
  • 14-gauge frameGalvanized steel; 12-gauge upgrade available.
  • Braces and anchorsOn every leg for added stability.

Product details

Specifications, Colors & Buying Guide

24x40x12 Building with One Side Lean-to specifications
Width24'
Height12'
Capacity2 standard vehicles
Roof Pitch3/12'
StructureClear span
Panels29-gauge
Gable endsFully enclosed
Garage doors2 × 8'×8'
Windows4 standard
Panel warranty10 years
InstallationFree Installation on Your Pad
Area960 Sq. Ft.
Sides:Fully Enclosed Horizontal Panels
Ideal UsesRV Storage, Boat Storage, Vehicle Storage, Workshop, Farm Equipment Storage, Contractor Storage
Trim ColorEvergreen
Garage Door(1) 10'x10' Roll-Up Garage Door
Frame Gauge:14 Gauge Galvanized Steel
Certification140 MPH Wind Load / 35 PSF Snow Load Certified
Frame MaterialHeavy-Duty Galvanized Steel
Lean-To LocationLeft Side
Vehicle Capacity:3–6 Vehicles (Depending on Layout)
Length40'
Floor area960 sq ft
Roof StyleVertical
Roof Length41'
Frame14-gauge galvanized (12-ga upgrade)
WallsHorizontal, fully enclosed
AnchoringBraces & anchors on every leg
Walk-in door1 × 36"×80"
Rust-through warranty20 years
Workmanship30 days
Service AreaNationwide
EndsFully Enclosed Horizontal Panels
DeliveryFree Delivery on Your Site
Roof ColorEvergreen
Wall ColorGalvalume
Peak HeightApprox. 15.75'
Install AreaNew Mexico
Building Type:Metal Garage with Lean-To
2d Floor plannerYes
Structure DesignEnclosed Garage with Attached Covered Lean-To
Installation SurfaceConcrete Slab

Can't Find the Right Fit? Design Your 24x40x12 Building with One Side Lean-to in 3D

Customize roof styles, colors, dimensions, doors, windows, insulation, lean-tos and certifications with our free 3D Building Designer before requesting a quote.

Design in 3D

Flexible Payments

Affordable Payment Options

Two simple ways to pay for your 24x40x12 Building with One Side Lean-to – with or without a credit check.

Traditional Financing

Through our financing partners
HFSFinancial

Low monthly payments with competitive rates. Apply online and get a decision fast.

  • Competitive rates & low monthly payments
  • No early payoff penalties
  • Get approved in minutes
See Financing Options →

Real Reviews From Garage Buildings Customers

FAQ

Frequently Asked Questions about 24x40x12 Building with One Side Lean-to

What are the benefits of a garage with a lean-to?
A garage with a lean-to provides both secure enclosed storage and covered outdoor space. Many owners use the enclosed section for vehicles and valuables while using the lean-to for RVs, boats, trailers, tractors, or equipment.
How much covered space does this building provide?
This building includes 960 square feet of enclosed garage space and 480 square feet of lean-to coverage, for a total of approximately 1,440 square feet of protected space.
Can an RV fit under the lean-to?
The lean-to is ideal for many campers, trailers, boats, tractors, and equipment. Always verify your vehicle dimensions before ordering to ensure adequate clearance.
Is a vertical roof worth the upgrade?
Yes. Vertical roofs provide better water runoff, improved snow shedding, lower maintenance requirements, and longer service life compared to regular roof styles.
What can I use this building for?
Popular uses include: RV storage Boat storage Vehicle parking Equipment storage Farm machinery storage Workshop space Contractor storage Outdoor covered workspace
Do I need a permit for this garage?
Most local jurisdictions require permits for enclosed metal garages. Permit requirements vary by location and should be verified before installation.
What foundation is required?
A properly prepared and level concrete slab is recommended. Site preparation and foundation work are typically the property owner's responsibility before installation.
Can this garage be customized?
Absolutely. You can customize the dimensions, colors, doors, windows, lean-to size, certifications, and other features to create a building tailored to your specific needs.

Essential Resources

Before You Buy

Everything you need to make a confident decision on your metal building purchase.

Talk to a Building Specialist

Not sure about sizing, roof style, or options? Our team has 29+ years of experience and will help you find exactly what you need.

(888) 234-0475Call Now