Home Addition Costs in the Everett Area
A home addition in the Everett area typically costs $150-$350 per square foot, depending on the type of addition, finishes, and complexity. Here's what to budget for different addition types.
Cost by Addition Type
- Bump-out (50-100 sq ft): $200-$350/sq ft — Extending an existing room without adding foundation. $10,000-$35,000 total.
- Room addition (150-400 sq ft): $150-$300/sq ft — New room on a new foundation. $22,500-$120,000 total.
- Second-story addition: $200-$350/sq ft — Adding a full or partial second floor. $80,000-$280,000+ for 400-800 sq ft.
- Sunroom: $150-$250/sq ft — Three-season or four-season room. $22,500-$50,000 for 150-200 sq ft.
What Drives the Cost?
- Foundation work: New additions need their own foundation — slab, crawlspace, or basement. This alone can be $10,000-$30,000.
- Roofline integration: Tying new roofing into the existing structure requires careful engineering. Complex rooflines cost more.
- Matching existing finishes: Siding, trim, and interior finishes should match the existing home seamlessly.
- Plumbing and HVAC: Adding a bathroom or extending HVAC to the new space adds $5,000-$15,000.
- Permits and engineering: Structural engineering, architectural plans, and permits typically run $3,000-$8,000 in Snohomish County.
Is a Home Addition Worth It?
In Snohomish County's competitive housing market (median home price $595K-$800K), a well-built addition typically adds 50-75% of its cost to your home's value. More importantly, it lets you stay in a home and neighborhood you love without the cost and stress of moving. With Everett's population growth driving housing demand, adding square footage is a sound long-term investment. NW General Contractor builds home additions throughout Snohomish County. Contact us for a free estimate or call (425) 286-5639.
Frequently Asked Questions
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NW General Contractor serves Everett and all of Snohomish County. Contact us for a free, no-obligation estimate on your project.