Partially enclosed lean-to
Added side coverage for storage and workspace
Partially enclosedBuilding:Lean-to structure
Lean-To StructuresExplore lean-to structures
Lean-To Metal Structures
Add practical single-slope coverage with a custom standalone, adjacent, or metal-building-attached lean-to designed for vehicles, equipment, workspace, and property functionality.
Standalone or Metal-Building Attached
RV & Equipment Coverage
Vertical Roof Options
Additional Covered Workspace
Lean-to metal structure
Adjacent covered workspace and equipment coverage
See the space change.
One real before-and-after view makes the footprint and finished covered space easier to picture. This is a representative lean-to project transformation.
BeforeOpen site
The footprint before the structure is installed.
After installationCovered space
The finished structure using the same footprint.
Installed projects
See lean-to coverage in context
Real project photos show standalone, adjacent, and metal-building-attached layouts.
Metal building with lean-to
Attached side coverage beside a steel building
Building:Lean-to structure
Lean-To StructuresReview lean-to options
Featured Products
Featured Lean-To Metal Structures
Compare popular configurations from this product family, review their saved specifications, and request pricing for the closest match or a custom variation.
Lean-ToAttached Slope
12' x 20' x 9'
- 14-Gauge frame
- Concrete anchors
- Side-wall coverage
Planning Price
$4,687
Lead Time
3–7 weeks
Lean-ToAttached Slope
12' x 25' x 12'
- 14-Gauge frame
- Concrete anchors
- Open access
Planning Price
$4,937
Lead Time
3–8 weeks
Single-Slope Coverage
A single-slope roof that adds covered space on its own or off a compatible reviewed metal building.
Flexible Covered Space
Lean-to structures add practical single-slope coverage where you need it — standalone, alongside, or attached to a compatible metal building. Not available for houses or conventional buildings.
Standalone
A single-slope shelter that stands on its own.
Metal-Building Attached
Adds side coverage to a compatible reviewed steel building.
Vertical Roof
Ridge-to-eave panels for runoff on longer lean-tos.
Sizing
What Size do You Need
Lean-to sizing depends on the coverage you need and any structure it attaches to. Use the matrix as a starting point.
Width Selection Matrix
Sizing based on standard vehicle footprints
| Width | Best Use Case | Capacity |
|---|---|---|
12' Wide | Single Car, Truck, or SUV | 1 Vehicle |
18' Wide | Two Compact Cars or One Large RV | 1-2 Vehicles |
20' Wide | Two Mid-Size Sedans | 2 Vehicles |
22' Wide | Two Full-Size Cars | 2 Vehicles |
24' Wide | Two Full-Size Trucks, SUVs, or Vans | 2 Vehicles |
26' Wide | Three Compact/Mid-Size Cars | 3 Vehicles |
28' Wide | Three Mid-Size Cars | 3 Vehicles |
30' Wide | Three Full-Size Cars, Trucks, or SUVs | 3 Vehicles |
Pro Tip: Door Swing Clearance
While these dimensions list vehicle capacity, we always recommend measuring your vehicle with the doors open. A 12' wide unit is a tight fit for a full-size truck with extended mirrors.
Configure It
Attachment Options
A lean-to can stand alone or connect to a compatible steel building — never to a house.
Standalone
An independent single-slope shelter sized for your site.
Adjacent
Sits beside another building without structural attachment.
Metal-Building Attached
Connects to a compatible reviewed steel building for added coverage.
Real Pricing
Pricing & What Drives It
Live starting prices from recent lean-to builds. Your final price depends on size, height, and attachment — get an instant estimate.
12' x 25' x 12'
12 x 25 x 12/9 Tall Lean-To Addition
Starting at$4,937
12' x 20' x 9'
12 x 20 x 9/6 Lean-To Metal Structure
Starting at$4,687
What drives the price
- Size — width, length, and leg height
- Frame gauge — 14-gauge vs heavier 12-gauge
- Roof style — standard vs premium upgrades
- Site — anchors, slab, and snow/wind rating
Get an Instant Estimate
Estimates only — contact us for an official quote
Planning & Requirements
Engineering & Permits
Attachment and load transfer are engineered around the site and any host structure.
Load Transfer
Attachment points engineered for wind and snow pressure.
Wind & Snow
Configurations for valley wind and foothill snow exposure.
Anchoring
Concrete, asphalt, or ground anchors are selected around the surface and local requirements.
Engineering Documents
Plans and calculations may be coordinated when local permit requirements call for them.
Lean-To Questions Answered
How much does a lean-to cost?
Lean-to structures start around $5,400 and scale with size, height, and whether they're standalone or attached. Use the calculator for an instant estimate, then we confirm an official quote.
Can a lean-to attach to my house?
No — lean-tos attach only to a compatible, reviewed metal building, or stand alone. They cannot be attached to houses or conventional wood-frame buildings.
What are lean-tos used for?
Extra single-slope coverage: RVs and equipment, covered workspace, firewood or feed storage, and side coverage added to an existing steel building.
Do you pour concrete or do foundation work?
No — Norcal Carports does not perform concrete or any foundation work. We provide site-appropriate anchoring but do not install foundations. See our foundation requirements guide to prep your site.
Request A Metal Building Quote
Need pricing for a carport, RV cover, garage, lean-to structure, or wide-span building? Send the size, installation ZIP code, surface, and site conditions. Most quote requests receive a response the same day or by the next business day.
Structure Sizing
Engineering
Snow Loads
Clearance