How Much Does a Home Addition Cost in Connecticut?
In Connecticut, the average cost of a home addition typically ranges from $80 to $300 per square foot. However, actual costs depend heavily on the scope and complexity of the project. Homeowners can expect to pay anywhere from $50,000 for a basic room addition to over $200,000 for luxury or multi-room expansions.
Second Story Additions: Typically more expensive due to structural reinforcement and added complexity. These can cost $150–$300 per sq ft.
Single-Level Room Additions: Bedrooms, family rooms, or sunrooms are generally more affordable, starting around $100 per sq ft.
Kitchen or Bathroom Additions: These cost more due to plumbing, electrical, cabinetry, and appliances—often $200–$400 per sq ft.
Larger additions require more materials and labor, increasing overall cost. A 200–400 sq ft addition will be significantly cheaper than a 1,000 sq ft multi-room expansion.
The choice of roofing, siding, windows, flooring, and fixtures can shift your budget considerably. High-end materials will raise the per-square-foot cost.
Additions that require plumbing, HVAC, or electrical modifications—like a bathroom or kitchen—tend to cost more.
Custom layouts, vaulted ceilings, and structural changes also increase labor and permit costs.
Prices vary depending on the town or county. Areas like Fairfield County may see higher labor and material costs than more rural regions like Litchfield or Windham County.
| Addition Type | Approximate Cost |
|---|---|
| Small Bedroom (200 sq ft) | $50,000 – $60,000 |
| Kitchen Expansion (300 sq ft) | $75,000 – $120,000 |
| Master Suite with Bath (500 sq ft) | $100,000 – $180,000 |
| Full Second Story (1,000+ sq ft) | $180,000 – $300,000+ |
Get multiple quotes from licensed contractors.
Design efficiently to reduce structural changes.
Plan during off-peak seasons for potential labor cost savings.
Consider modular or prefab additions if suitable for your needs.
Bottom Line:
Home addition costs in Connecticut can vary widely depending on your goals. Whether you're expanding your living space with a new bedroom or creating a luxury second story, working with a local contractor and planning your budget carefully can help you maximize value while staying within budget.