Adding a dormer to your home enhances natural light, increases space, and improves curb appeal. Costs vary widely based on size, style, roof type, and materials. Here’s a detailed breakdown:

Average Costs

| Metric | Cost | |------------------------------------|---------------------------| | Per Square Foot | $80–$200 | | Small Window Dormer | $3,000–$8,500 | | Bathroom Dormer | $20,000–$55,000 | | Attic Dormer | $19,000–$30,000 | | Labor | $30–$50 per hour | | Permit Fees | $390–$1,930 |

Cost by Dormer Style

| Dormer Style | Cost per Square Foot | |--------------------|--------------------------| | Shed Dormer | $75–$120 | | Gable Dormer | $110–$150 | | Nantucket Dormer | $95–$140 | | Flat Dormer | $80–$125 | | Hip Dormer | $115–$135 | | Prefab Dormer | $65–$90 |

Cost Factors

• Dormer Size
• 50 sq. ft.: $4,000–$10,000
• 100 sq. ft.: $8,000–$20,000

• 200 sq. ft.: $16,000–$40,000

• Roof Type

• Asphalt: $5–$12 per sq. ft.
• Metal: $8–$14 per sq. ft.

• Clay or Slate: $12–$24 per sq. ft.

• Materials

• Windows: $75–$1,500 each (depending on material)
• Siding: $1–$20 per sq. ft.

• Cladding (for water protection): $2–$15 per sq. ft.

• Foundation Reinforcement

• Reinforcement: $4,000–$12,000

• Repairs: $2,000–$8,000

• Labor and Structural Work

• Expect ~50% of your total cost to go toward labor (~$6,000 average).

Common Add-Ons

• Flooring: $12.50 per sq. ft.
• HVAC Extension: ~$3,500
• Gutters: $4–$40 per linear foot

How to Save Money

• Opt for prefab dormers instead of custom designs.
• Choose simpler styles like flat or shed dormers.
• Install a single window per dormer instead of larger, more elaborate designs.
• Use budget-friendly materials, like asphalt shingles or vinyl siding.
• Select a flatter roof slope for easier and cheaper installation.

DIY vs. Hiring a Pro

• Savings Potential: $1,000–$15,000 in labor costs.
• Risks: Structural errors, water damage, or improper permits.
• Recommendation: Hire a professional for safety and accuracy, especially for complex projects.

Adding a dormer is an excellent investment for extra space and style. Proper planning, cost-efficient choices, and hiring experienced contractors can make your dream dormer a reality!

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