Sunroom Cost Guide — Long Island 2025

The short answer: $8,000 to $130,000

The range is wide because there are five genuinely different products:

• Screen Room: $8,000 – $22,000
• Patio Enclosure: $12,000 – $28,000
• Three-Season Room: $18,000 – $40,000
• Four-Season Sunroom: $35,000 – $85,000
• Glass Room Addition: $55,000 – $130,000

Each is a different level of construction, different materials, and different use case. Here's what drives the price in each category.

Screen rooms: $8,000 – $22,000

The most affordable option. Aluminum framing, screen panels, roof, ceiling fan, and lighting. No glass. Mostly for bug elimination and shade — not rain or wind protection.

What affects cost:

• Size (120–200 sq ft is typical)
• Screen type (standard vs. pet-resistant)
• Whether you have an existing slab or deck
• Roof style

Per square foot: $40 – $110

Patio enclosures: $12,000 – $28,000

If you have an existing concrete patio in decent condition, this is the most cost-effective upgrade. We frame around the existing slab and add panels.

What affects cost:

• Whether slab needs repair
• Panel type (screen, sliding glass, or combination)
• Adding a roof vs. using existing coverage
• Size and shape of existing patio

Per square foot: $60 – $140

Three-season rooms: $18,000 – $40,000

The most popular product we install. Glass or screen panels, proper foundation, full roof structure. Usable from April through November on Long Island.

What affects cost:

• Foundation type (new vs. existing)
• Glass vs. screen panels
• Roof style (lean-to vs. gable)
• HVAC (optional space heater rough-in)
• Size (most installs: 150–250 sq ft)

Per square foot: $90 – $200

Four-season sunrooms: $35,000 – $85,000

Fully insulated, HVAC-connected room additions. True year-round use. The higher cost reflects real insulation, thermal glass, and full HVAC coordination.

What affects cost:

• Foundation (new vs. existing slab)
• Glass specification (double vs. triple-pane Low-E)
• HVAC method (duct extension vs. mini-split)
• Roof complexity
• Size (200–300 sq ft typical)

Per square foot: $175 – $350

Glass room additions: $55,000 – $130,000

Full conservatory-style construction with glass walls and glass roof. Requires structural engineering. The highest-impact addition you can make to a Long Island home.

Per square foot: $275 – $550

Why Long Island pricing runs higher than national averages

National cost guides typically quote lower numbers. Long Island is higher for three reasons:

1. Labor. Union-area labor rates and cost of living mean contractor wages run higher.
2. Permitting. Nassau and Suffolk County permit fees, engineering requirements, and snow load specifications add real cost.
3. Salt air. Coastal climate requires better material specification — aluminum that doesn't corrode, glass with marine-grade sealants, fasteners that don't rust.

A screen room that costs $6,000 in Ohio costs $9,000–$14,000 here because the right materials and labor cost more.

How to get a real number

The only way to get an accurate quote for a Long Island sunroom is an in-home estimate. Anyone who quotes you over the phone without seeing your yard, your slab, your home's structure, and your lot's setbacks is guessing.

We provide free, itemized in-home estimates. Every line is broken out — framing, glass, foundation work, permits, electrical, cleanup. No bundled numbers.