Our 4-season sunrooms average $260 per square foot for a complete custom build. This premium price includes high-performance insulated glass, full insulation, and preparation for heating and cooling — making it a true year-round living space that stands up to New Jersey’s cold winters.
Realistic 2026 Pricing Examples
- 10×12 (120 sq ft) 4-season sunroom — $31,200 range
- 12×16 (200 sq ft) 4-season sunroom — $52,000 range
- 12×20 (240 sq ft) 4-season sunroom — $62,400 range
- 14×20 (300 sq ft) 4-season sunroom — $78,000 range
Prices include TEMO structural system, insulated glass, full insulation package, roofing, and professional installation. Actual cost may vary based on foundation requirements, HVAC tie-ins, electrical work, or site-specific conditions in your township.
Why New Jersey Homeowners Choose 4-Season Sunrooms
- True year-round usability — heat in winter, cool in summer
- High-performance insulated glass for energy efficiency
- Adds valuable living space and increases home resale value
- Perfect for families who want a dedicated sunroom, office, or lounge area
- Built to handle New Jersey’s harsh weather conditions
Screened • 3-Season • 4-Season Sunroom Cost Comparison (New Jersey 2026)
| Sunroom Type | Cost per Sq Ft | Best For |
|---|---|---|
| Screened Room | $100 | Bug-free outdoor living |
| 3-Season Room | $200 | Shoulder seasons |
| 4-Season Room (Insulated Glass + AC-Ready) | $260 | Year-round comfort & living space |
Calculate your exact 4-season sunroom cost now →
We Handle All Permitting for Your 4-Season Sunroom
Legion Build manages the full permitting and inspection process in Ocean County, Monmouth County, Middlesex County, Somerset County, and Union County. From engineering to final approval — we take care of everything so you don’t have to.
Ready to build a true year-round 4-season sunroom?
Get Your Free On-Site Quote TodayOr call (732) 674-3454 — We serve all of central & coastal New Jersey
More Sunroom Resources
