Free delivery and quick, free installation
Refundable small deposit to order
20-year warranty on 12-gauge orders

Get your custom building at our factory direct prices with free delivery and installation!

Customize Now, It's Free

Get custom buildings with
free delivery and installation!

Customize Now

Concrete Pad Size Calculator

Use this calculator to estimate the concrete pad size required for your building.

Customize and Buy Online
Choose Your Frame Size
Width
Length
Recommended concrete pad size for your 12’ x 20’ metal building: 13’ x 21’
Customize and Buy Online

Learn More About Concrete Pads for Metal Carports and Garages

Your concrete pad should be one foot wider and one foot longer than the size of the carport or metal building you are ordering.

The reason for the larger pad recommendation is that the engineers who designed the metal structures recommend a 6” curtain of concrete on every side. This ensures proper anchoring and helps prevent potential concrete cracking at the perimeter.

We would encourage you to check with your local building codes to determine the pad size, pad thickness, footing requirements, or any other regulations you must adhere to. Local building codes will always supersede our recommendations.

Alan’s Factory Outlet can deliver and install a metal building after your concrete slab has been poured. We don’t pour concrete slabs, so you will need to hire a local concrete contractor or do it yourself.

To prevent water from pooling next to the base rail of your building, it’s recommended to lower the six-inch ledge around your building by ¾”. You can show the image below to your concrete contractor for reference.

We have a 4.8 Overall Star Rating based on more than 21,000 reviews on Shopper Approved, an independent website.

Rating: 5 stars
4.8 Overall Store Rating

Instant Online Price

Carport Roof Style
Choose Frame Size
Product Builder Image
12 X 21 Vertical Metal Carport
$1,695.00

Depending on doors, windows, height, and other add ons

Alan's Metal Garage Buyer's Guide Cover

Make an Informed Decision with Our Garage Buyer's Guide

Download our free Garage Buyer’s Guide to learn everything you need to know before purchasing a metal garage. It’s packed with straightforward advice to help you make a confident decision.

Thanks for your interest in our Garage Buyer's Guide

You will receive an email shortly with a link to download the Garage Buyer's Guide.

Ready to create your garage today?

Customize Now

Why Shop Alan’s Factory Outlet for Metal Buildings?

Fast Delivery Times

Alan’s Factory Outlet metal buildings and carports are delivered and installed saving you time.
Delivery and installation is free.

21 Years in Business

Alan’s Factory Outlet has been serving customers with their carport, garage and metal building needs for over 21 years.

Minimal Requirements

You only need to provide a foundation and building permit. For buildings over 30 feet wide, a telescopic forklift rental is also required for installation.

Great Customer Service

Most customers love our easy online design and ordering process. But if you prefer to call us, our friendly building specialists are happy to help with anything you need.

Do you have a general question?

Get quick answers to common questions in our Help Center, an extensive knowledge base available 24/7.


Do you need something specific?

Please fill out the form on this page, or call us at 1-800-488-6903 (M-F, 8-6 Eastern).

Customize Your Own Metal Garage or Carport With Our 3D Builder

Easily design, price, and buy online — plus get free delivery and installation!

Customize Now
Sorry, we don\’t deliver to the selected zip code.
Your Zip Code helps us provide the exact price for your location as construction specs vary depending on code requirements for each state.

    Search results