Quick Answer: A sunroom addition costs $50–$175 per square foot installed. Screened porches run $20/sq ft material, 3-season rooms $40/sq ft, 4-season rooms $65/sq ft, and solariums $90/sq ft. A typical 200 sq ft sunroom costs $8,000–$42,000 total depending on type. Labor runs $8–$18/sq ft based on carpenter rates of $23–$33/hr nationally. Add $2,500–$8,200 for foundation, permits, plans, electrical, and HVAC. Enter your ZIP for local pricing.
Calculate how much a sunroom addition costs. Compare four sunroom types, enter your desired square footage and ZIP code to get a location-specific estimate with a full cost breakdown.
Sunroom Cost by Type
| Sunroom Type | Material $/sq ft | Total $/sq ft | 200 sq ft Room |
|---|---|---|---|
| Screened Porch | $20/sq ft | $50–$75/sq ft | $8,000–$15,000 |
| 3-Season | $40/sq ft | $75–$120/sq ft | $15,000–$30,000 |
| 4-Season | $65/sq ft | $120–$175/sq ft | $25,000–$50,000 |
| Solarium | $90/sq ft | $150–$225/sq ft | $40,000–$80,000 |
How Sunroom Cost Is Calculated
- Materials: Area × $20–$90/sq ft depending on type. Includes framing lumber, windows/screens, roofing, insulation, interior finish, and flooring as applicable.
- Labor: Area × 0.20–0.45 hr/sq ft × hourly rate × 1.5 burden. Solariums require the most labor (0.45 hr/sq ft) due to precision glass panel installation and specialized framing.
- Fixed costs: Foundation ($1,500–$3,000), permits ($500–$1,200), architectural plans ($0–$1,500), electrical ($500–$1,000), and HVAC ($0–$2,500). These vary significantly by sunroom type.
- Contractor markup: 20% for general contractor overhead, profit, and warranty.
Sunroom Type Comparison
- Screened Porch: Open-air room with screen walls and a roof. No windows, no insulation, no HVAC. Usable when temperatures are comfortable (typically April–October in most US regions). Simplest foundation. Lowest cost option.
- 3-Season Room: Enclosed room with single-pane or basic double-pane windows. Minimal insulation. No dedicated HVAC — relies on passive solar heating and ceiling fans. Comfortable spring through fall. A popular middle-ground choice.
- 4-Season Room: Fully insulated addition with energy-efficient windows (low-E, double or triple pane), insulated walls and ceiling, and HVAC connection for year-round comfort. Meets building code as living space. Adds the most home value. Requires full foundation to frost depth.
- Solarium: All-glass or mostly-glass room with glass roof panels. Maximum natural light. Often aluminum or steel framing for structural glass support. Most expensive due to premium glass panels and specialized installation. Best in mild climates or with climate control for extreme temperatures.
Fixed Cost Breakdown by Type
| Cost Item | Screened | 3-Season | 4-Season | Solarium |
|---|---|---|---|---|
| Foundation | $1,500 | $2,000 | $2,500 | $3,000 |
| Permits | $500 | $700 | $1,000 | $1,200 |
| Plans | $0 | $0 | $1,000 | $1,500 |
| Electrical | $500 | $500 | $800 | $1,000 |
| HVAC | $0 | $0 | $2,000 | $2,500 |
| Total Fixed | $2,500 | $3,200 | $7,300 | $9,200 |
Formula Summary
Sunroom Cost Formula: Total installed cost includes materials (framing, windows, roofing, finish), burdened carpentry labor, and fixed costs for foundation, permits, plans, electrical, and HVAC, multiplied by contractor markup.
Total = (A × M + A × H × R × 1.5 + F) × 1.20
where A = sunroom area (sq ft), M = material cost/sq ft, H = labor hours/sq ft, R = hourly carpenter rate, 1.5 = labor burden, F = fixed costs, 1.20 = markup.
| Type | Material $/sq ft | Hr/sq ft | Fixed Costs |
|---|---|---|---|
| Screened Porch | $20 | 0.20 | $2,500 |
| 3-Season | $40 | 0.30 | $3,200 |
| 4-Season | $65 | 0.40 | $7,300 |
| Solarium | $90 | 0.45 | $9,200 |
Constants: Labor burden 1.5×. Contractor markup 20%. Trade: carpenters (SOC 47-2031), national mean $27.30/hr. Fixed costs vary by type and include foundation, permits, plans, electrical, and HVAC. Rates from BLS OEWS May 2024, 393 metros.
Carpenters Hourly Rates by Metro (BLS OEWS May 2024)
| Metro | 25th %ile | Mean | 75th %ile |
|---|---|---|---|
| New York | $27.07 | $37.32 | $46.01 |
| Los Angeles | $26.91 | $36.97 | $47.02 |
| Chicago | $24.11 | $38.11 | $51.92 |
| Dallas | $20.33 | $24.01 | $26.76 |
| Houston | $22.32 | $24.93 | $28.40 |
| Washington | $23.86 | $30.71 | $34.34 |
| Philadelphia | $24.09 | $32.62 | $36.99 |
| Miami | $20.50 | $24.57 | $27.85 |
| Atlanta | $22.03 | $24.84 | $28.25 |
| Phoenix | $22.72 | $28.74 | $34.55 |
Considering a Larger Addition?
Use Our Home Addition Cost Calculator →
Estimate full home addition costs for bedrooms, bathrooms, and living spaces.
Related Calculators
- Home Addition Cost Calculator — estimate full home addition costs
- Window Replacement Cost Calculator — estimate window costs for sunroom upgrades
- Flooring Cost Calculator — estimate flooring costs for your sunroom
- Insulation Calculator — calculate insulation for 4-season sunroom walls and ceiling
Estimates are for planning purposes only. Consult a qualified contractor for critical projects. Actual material requirements may vary based on site conditions, waste, and installation methods.
Pricing last verified: February 2026. Material prices vary by region, season, and supplier. Prices shown are national averages for planning purposes.