Building a one-car garage typically costs between $7,500 and $27,000, with a national average around $16,000. The final price is highly dependent on the construction method, materials, and whether you're building attached to your home or as a standalone structure. A basic pre-fabricated or kit garage is the most affordable route, while a custom-built garage with high-end finishes will be at the top end of the spectrum.
The single biggest factor influencing cost is the foundation. A simple gravel base is inexpensive, but a poured concrete slab is the standard for durability and is a significant line item in the budget. The size also plays a role; while a standard one-car garage is about 12'x20', going larger will increase material and labor costs. Other major expenses include framing, roofing, siding to match your house, and the garage door and opener system.
Labor is another crucial component. If you have advanced DIY skills, you might handle parts of the project yourself to save money. However, tasks like pouring the concrete slab and electrical work are best left to licensed professionals to ensure safety and compliance with local building codes. Don't forget to factor in the cost of permits, which are required in most municipalities.
Here’s a breakdown of potential costs based on different approaches:
| Construction Type | Low-End Cost | High-End Cost | Key Characteristics |
|---|
| Pre-fabricated Kit | $5,000 | $10,000 | DIY-friendly, basic materials, minimal foundation required. |
| Standard Built (Attached) | $15,000 | $25,000 | Poured concrete slab, standard siding/roof, single garage door. |
| Custom Built (Detached) | $22,000 | $35,000+ | High-quality finishes, insulation, electrical, custom sizes. |
| Garage Conversion | $5,000 | $15,000 | Converting existing space; cost depends on current condition. |
| With Loft/Storage | $25,000 | $45,000+ | Adds significant square footage and structural complexity. |
To get an accurate price, it's essential to get at least three quotes from local contractors. They can assess your specific property, discuss material options, and provide a detailed estimate that includes all potential costs.
