A three-season sunroom in New Jersey runs about $12,000 to $35,000. A true four-season room you can sit in on a January morning runs about $25,000 to $80,000. The difference isn't the glass you can see — it's the footings, the floor and the insulation you can't. We build both: on new frost-depth footings, or on a deck or slab we've proven can carry the load, with the permits pulled and the heat, power and lighting run by our own crew.
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A three-season sunroom in New Jersey runs about $12,000 to $35,000. Typical price: $15K – $85K. Licensed & insured, written itemized price before work starts, no deposit, one dedicated crew. Serving all 21 New Jersey counties from Paramus. Call (201) 676-3099 or book a free estimate.
A three-season room is a shell: single-pane or lightly insulated glass, an uninsulated floor over open air, no heat run to it. In New Jersey that's a beautiful room from about April to October and a cold storage closet from December to March. It's cheaper because there's less in it.
A four-season room is an addition that happens to be mostly glass. Insulated walls and roof, an insulated floor deck, Low-E glass, and its own heat and cooling. You can put a couch in it and use it in February. It costs more because it's built to the same code as a bedroom.
Here's the question that settles it: will you put furniture you care about in there? If yes, build four-season. Every year we get called to 'upgrade' a three-season room somebody bought five years ago, and the honest answer is that you're rebuilding the floor, the roof and the glass — which is most of the room.
New Jersey's frost line is about 36 inches. A room on shallow piers or, worse, sitting on a patio slab poured 4 inches thick for a barbecue will heave every winter. Doors stop latching. Glass cracks in the corners. The seam where the room meets the house opens up and leaks.
We dig footings below the frost line, or we open up your deck and show you what the posts and beams actually are before we agree to build on them. A lot of 20-year-old decks were built to hold a grill and six people, not a glass room with a snow load on top. If yours can't carry it, we tell you at the estimate and price the footings as their own line — not as a surprise after demo.
We measure the opening, check the existing roof line and the deck or slab, and lay out the room so the new roof tucks under your eave or ties into it properly. You get drawings and a written itemized price.
We check setbacks and lot coverage with your township, then file for the building, electrical and (if we're running heat) mechanical permits. We handle the inspections.
Footings dug below frost, poured and inspected. Framed and insulated floor deck, or a prepped slab edge with a proper thermal break.
Walls framed, roof set, flashed and tied into the house wall with step flashing and a kick-out — the spot where cheap sunrooms leak.
Insulated glass units set, patio or French door hung, everything sealed and squared. The room is watertight at the end of this step.
Mini-split, outlets, switches and lights. Floor, trim, paint. Site swept.
Item-by-item walkthrough with you before you release final payment. Hose test on the roof-to-wall joint while you watch.
Don't let anyone extend your existing ductwork into a sunroom. Your furnace was sized for the house you had; a glass room is the single hardest space in the house to condition, and stealing air from it usually means the back bedroom goes cold.
We install a ductless mini-split — one wall head, one small outdoor unit, its own thermostat. It heats down into the teens, cools hard in July, and runs only when you're using the room. Electric baseboard is cheaper to install and brutal to run; we'll quote it if you ask, and we'll tell you what it costs you per winter.
A sunroom is a structure, so every New Jersey township wants a building permit under the NJ Uniform Construction Code, plus zoning sign-off for setbacks and lot coverage. Corner lots, shore towns with flood elevations, and older neighborhoods with tight side yards are where this gets interesting.
We check zoning before we quote, not after you've paid. If your lot won't take the room you want, you'll hear it from us at the kitchen table — and we'll tell you what size will fit. We pull the permits, meet the inspectors and hand you the closed-out paperwork at the end.
Paramus-based, building sunrooms and solariums across all 21 New Jersey counties. Got a three-season room from another company that's leaking, heaving or freezing? We'll look at it and tell you honestly whether it's fixable. Send plans, deck photos or an old quote to info@firstcallcontractingnj.com and we'll come back with a number.
typical fixed-price range — your exact number goes in writing after a free visit
How we beat the big chains: Sunroom chains sell a kit at a kit price, then hand the footings to one sub, the electric to another and the heat to a third — and every one of them marks it up again on your invoice. We build the whole room with one crew and one number. No franchise fees, no commissioned salesmen, no rented subcontractors — that's typically 15–30% under national-brand quotes for the same or better spec. Bring us any written quote and we'll match the scope line by line.
“They built my sunroom right on top of the old patio slab. Two winters later the whole corner lifted and the door won't close.”
“The salesman promised a four-season room. It's 45 degrees in there in January and there's no heat run to it.”
“Where the sunroom roof meets the house, it leaks every nor'easter. Three trips and they still can't find it.”
You found a crew that is actually near you. First Call Contracting is based in Paramus, in Bergen County, and our own licensed techs handle sunrooms & solariums in all 21 New Jersey counties — no call center, no subcontractor sent from two states away. Most of Bergen, Passaic, Hudson and Essex is 15 to 30 minutes from our shop, and emergencies go to the nearest crew, 24/7.
Closest to us: Bergen CountyPassaic CountyHudson CountyEssex CountyMorris CountyUnion CountyAll 21 counties & 219+ towns →
Call (201) 676-3099, text us a photo, or book a free in-home estimate — you get a written price before any work starts.
A three-season room runs about $12,000 to $35,000 and a four-season room about $25,000 to $80,000, installed. The spread comes from size, foundation work, roof type and whether we're running heat and power. You get an itemized written price at the free estimate, and it's good for 90 days.
Yes. It's a structure, so your township issues a building permit under the NJ Uniform Construction Code, plus electrical and mechanical permits if we're adding power and a mini-split. Zoning sign-off for setbacks and lot coverage comes first. We pull all of it and meet the inspectors.
Sometimes. We open up the framing and look at the footings, posts, beams and ledger before we say yes. Many older New Jersey decks were built for a grill and patio furniture, not for walls, glass and a snow load. If it won't carry it, we price new footings and a new floor deck as a separate line.
Most rooms take three to six weeks on site once permits are in hand, plus two to five weeks for zoning and permit turnaround depending on your township. Glass and roof panels are ordered to your exact opening, so there's lead time before we break ground. We give you the timeline in writing before work starts.
A solarium has a glass roof; a sunroom usually has a solid insulated or shingled roof with glass walls. Glass roofs are gorgeous and they are hotter in July, colder in January and harder to keep watertight. If you want one, get Low-E laminated glass and plan for shades.
A well-built four-season room on a real foundation usually appraises as finished square footage, because it is. A three-season room on posts usually doesn't — an appraiser counts it as a porch. That's worth knowing before you choose which one to build.
If you're anywhere in New Jersey, yes. First Call Contracting is based in Paramus and handles sunrooms & solariums across all 21 counties with our own licensed crew. Most of Bergen, Passaic, Hudson and Essex is 15 to 30 minutes from our shop, and emergencies are dispatched to the nearest crew 24/7. Call (201) 676-3099 or book a free in-home estimate.
Footings below frost · insulated glass · heat that works in January
Or call Alex direct: (201) 676-3099
A real person picks up every hour of every day. We tell you what to shut off first, then send the nearest crew.