1. Average Costs

• National Average: $3,489–$8,676
• Per Square Foot:
• With Labor: $3–$7/sq. ft.
• Without Labor: $1–$3/sq. ft.

2. Cost by Location

| City | Cost Range | |----------------------|-------------------| | Los Angeles | $3,000–$5,500 | | Portland, Oregon | $3,000–$6,000 | | San Francisco | $4,000–$6,000 |

3. Costs by Foundation Type

| Foundation Type | Cost Range | |---------------------------|------------------------| | Slab | $500–$3,000 | | Basement | $3,000–$5,000 | | Footing Stem Wall | $3,000–$7,000 | | Post and Pier | $3,000–$10,000 | | Brick | $2,000–$10,000 | | Wood | $5,000–$10,000 |

4. Retrofitting Methods & Costs

| Method | Cost Range | |----------------------------|------------------------| | Foundation Bolting | $500–$3,000 | | Cripple Wall Bolting | $1,000–$3,000 | | Mudsill Anchoring | $1,000–$3,000 | | Cripple Shear Wall Bracing | $1,000–$2,500 |

• Foundation Bolting: Secures home to foundation to prevent sliding.
• Cripple Wall Bolting: Anchors short stud walls for stability.
• Mudsill Anchoring: Bolts base of framing to cripple walls.
• Shear Wall Bracing: Adds plywood or steel for extra strength.

5. Costs by Home Type

| Home Type | Cost Range | |-----------------------|------------------------| | Hillside Homes | $5,000–$10,000 | | Manufactured Homes| $5,000–$15,000 | | Mobile Homes | $3,000–$25,000 | | Soft-Story Homes | $10,000–$350,000 |

6. Materials Breakdown

| Material | Cost | |----------------------------|-----------------------| | Foundation Anchors | $50–$100 each | | Foundation Brackets | $25–$75 each | | Foundation Plates | $20–$50 each | | Plywood | $5–$10 per sheet | | Wall Bracing | $2–$10/sq. ft. | | Seismic Shutoff Valve | $100–$300 each |

7. Labor Costs

• Labor makes up 70% of the total cost.
• Initial structural assessment: $100–$300.

8. DIY Savings

• Potential Savings: Up to 70% on labor.
• Example: A $5,000 retrofit can cost around $1,500 with DIY labor.
• Caution: Improper installation can increase risks during earthquakes.

9. Tips to Save Money

• Combine Methods: Use cost-effective techniques like foundation bolting.
• Plan in Advance: Retrofit during other renovations to save on labor.
• Hire Locally: Choose local pros to reduce travel and material costs.

Why Retrofitting Matters

• Safety: Prevents homes from sliding or collapsing.
• Increased Value: Boosts resale value in earthquake-prone areas.
• Insurance: May be required for coverage in high-risk zones.

Prepare now for peace of mind later!

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