Adding a detached garage can increase your property’s value and provide functional space. Here’s a detailed breakdown of the costs:

1. Total Cost

• Average Cost: $19,600
• Typical Range: $9,600–$40,000
• Low-End: $5,000
• High-End: $75,000

2. Cost by Garage Size

| Garage Size | Square Feet | Cost Range |
|------------------|----------------|-------------------------|
| 1 Car | 240–384 | $9,600–$26,900 |
| 2 Cars | 360–480 | $14,400–$33,600 |
| 3 Cars | 700–860 | $28,000–$60,200 |
| 4 Cars | 800–1,080 | $32,000–$75,600 |

3. Key Cost Factors

Foundation

• Concrete Slab: $4–$8 per sq. ft.
• For a 2-car garage: $1,400–$3,800.

Roofing

• Cost: $10,000–$20,000
• Per Sq. Ft.: $4–$5
• Materials range from aluminum (cheaper) to slate shingles (priciest).

Siding

• Cost Per Sq. Ft.:
• Stucco: $7–$9
• Vinyl: $3–$12
• Brick: $10–$20
• Stone: $7–$30

Doors

• Garage Door Cost: $750–$1,650
• Glass Doors: 200–300% more expensive.

Windows

• Cost Per Window: $200–$1,300
• Vinyl frames are cheapest, while custom wood frames cost more.

Labor

• Cost: $3,000–$15,000 or 60% of material costs.

4. Additional Features

| Feature | Cost |
|------------------|--------------------|
| Plumbing | $600–$1,600/fixture |
| Wiring | $1,000–$2,500 (up to $5,000 for complex jobs) |
| Insulation | $0.50–$1.25/sq. ft. |
| Interior Painting | $2.75/sq. ft. |
| Exterior Painting | $1.50–$4/sq. ft. |

5. DIY vs. Hiring a Pro

• DIY Cost: $5,000–$25,000
• Savings: $3,000–$15,000.

• Risks: Mistakes, safety issues, and code violations.

• Hiring a Pro:

• Cost: $8,000–$40,000.
• Advantages: Faster, up to code, structurally sound.

6. Tips to Save Money

• Opt for smaller square footage.
• Build closer to existing plumbing/electricity.
• Choose cost-effective materials (e.g., vinyl siding, steel doors).
• Minimize windows.
• DIY simpler tasks like painting.
• Get multiple quotes from contractors.

7. Detached vs. Attached Garage

• Detached Garages cost 10–15% more due to extra materials and labor.
• If far from the main house, expect higher plumbing and electrical costs.

Investing in a detached garage enhances functionality and boosts property value, making it a worthwhile addition.

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