Garage Building Cost Calculator
See the real cost difference between DIY, kit-built, and contractor-built garages — with a line-item breakdown for your project.
What a Garage Really Costs: DIY, Kit, or Contractor-Built
Prefab garage kits and DIY builds are marketed as budget options — but in Florida, foundation, permitting, and wind-load-rated construction requirements narrow that gap more than most people expect.
A metal carport kit and a permitted, code-compliant detached garage are two different products. This calculator-style estimate compares the real all-in cost of each path, including the foundation, permitting, and wind-load engineering that a simple kit price often doesn't include.
We prepare a line-item cost comparison so you can see where DIY genuinely saves money and where it doesn't — before you commit to a build method.
What Changes Between Build Methods
Foundation Work
Both DIY and contractor builds require a code-compliant slab — a cost that doesn't disappear with a kit.
Permitting
Permits and inspections are required regardless of who builds the structure.
Wind-Load Engineering
Kit structures still need engineering sign-off to meet Florida wind-load requirements.
Labor & Time
DIY saves labor cost but adds significant time and skill-dependent risk.
Warranty & Liability
Contractor-built structures typically carry workmanship warranties that DIY builds don't.
Finish Quality
Contractor builds more consistently meet code on the first inspection, reducing rework risk.
Garage Cost Comparison: 2-Car Garage (20' x 20')
Illustrative comparison for a standard 2-car garage. Your actual costs depend on site conditions and finish level.
| Build Method | Typical All-In Cost | Notes |
|---|---|---|
| Metal Carport Kit + Slab + Permit | $18,000 – $28,000 | Open-sided or basic enclosure, DIY assembly |
| DIY Wood-Frame Build + Permit | $22,000 – $34,000 | Requires significant skill and time investment |
| Licensed Contractor-Built | $28,000 – $52,000 | Includes warranty, code compliance, full finish option |
Get Your Garage Cost Comparison in 4 Steps
Submit Your Preferences
Tell us your target size and which build methods you're comparing.
Receive a Flat-Rate Quote
We review scope and send a firm price and delivery date.
We Prepare Your Comparison
Line-item cost breakdown for each build method you're considering.
Get Your Bid-Ready Report
Delivered in PDF + Excel, ready to guide your decision.
Frequently Asked Questions
Is a DIY garage actually cheaper in Florida?
It can be, but the gap is smaller than kit pricing suggests once foundation, permitting, and wind-load engineering are included — costs that apply regardless of build method.
Do metal carport kits meet Florida wind code?
Only if engineered and installed to meet the wind-load rating required for your site. Many basic kits require additional engineering to be code-compliant in Florida.
What's included in a contractor-built garage estimate?
Foundation, framing or CBS walls, roofing, and finish level of your choice, plus permitting — delivered as a line-item breakdown.
Can I get just the DIY cost breakdown without a contractor quote?
Yes, we can prepare a materials-and-permit-only breakdown if you're planning to self-perform the labor.
How fast can I get a garage cost comparison?
Most garage cost comparisons are delivered within 48 hours of receiving your project preferences.
Get Your Garage Build Cost Comparison
48-hour delivery · DIY vs. contractor pricing · PDF + Excel