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.
Florida Garage Scope Planning
A useful garage budget separates site layout, clearing and grading, slab and foundation requirements, structural system and wind-load assumptions, roof and wall assemblies, openings, electrical and finish allowances, access, permits, and current Florida trade-pricing data. Defined scope assumptions help clients compare DIY, kit, and contractor pricing with greater clarity.
Explore related planning resources for the detached garage cost estimator, concrete estimating, residential estimating, and the statewide construction cost estimator.
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