Sunroom Contractor in Ontario, CA - Dry Rooms on a Base That Can Carry Them
Sunhaven Ontario Sunrooms & Patios is a sunroom contractor based in Ontario, CA. We add sunrooms, patio enclosures and patio covers to houses here, built to stay dry and sit on a base that can carry them.
Single-family homes across Ontario, old and new
Most of our calls in Ontario come from single-family houses with a backyard slab and a patio cover someone put up years ago. You'll find older single-story houses closer to downtown and newer tract homes farther south, and plenty of both want the same thing, a room off the back they'll actually use. We're based here, so these are the jobs closest to home, and we do the same work next door in Chino and Montclair.
That mix changes the job. An older house often has a slab poured for a barbecue, not a wall, and a cover tied into the roof however the last guy felt like it, so I look at both before I quote anything. Newer houses usually start cleaner, but the joint with the house still decides whether the room stays dry.
What to know about building a sunroom in Ontario
Whether your sunroom needs a permit is the city's call, and in Ontario that goes through the Building Department, which checks the plans and sends inspectors out while the room goes up. That plan review usually sets the start date more than anything else, so I'd rather get the drawings in early than promise you a week I don't control. Before you hire anyone, make sure they hold a current California contractor's license and an Ontario business license, because the state and the city both require them for work like this.
What moves the price is mostly the size of the room, the roof and glass you choose, and what it sits on, since a slab that can't carry walls means new footings before anything else goes up. Power, lighting and heating and cooling add to it, and so does tearing out an old patio cover that isn't worth keeping. The written quote from the estimate spells out what's included, so you'll see where your number comes from, and it's the same process for neighbors up in Upland, where the permit office changes but the base work doesn't.
Services in Ontario, CA
Sunroom additions
A lot of Ontario houses have backyard room to spare and no second living space, which is where sunroom additions come in. We set the room on footings sized for walls and a roof, then tie it into the house so the joint stays dry.
Patio-to-sunroom conversion
Plenty of homes here already have a slab and a cover out back, and owners would rather close it in than start over. I check whether that slab and cover can take walls and glass before we plan on keeping either one.
Patio enclosures
When the cover is solid and you mostly want a shaded room that keeps bugs and dust out, an enclosure is the lighter way to get there. We fit the walls to the cover you have and seal them where they meet the house.
Patio cover installation
Older patio covers around here are often sagging or fastened to the house in ways I wouldn't sign off on. We take down what's failing and put up a cover attached properly, so it's ready to enclose later if you want a room.
Four season sunrooms
If you want the room to work as a real part of the house all year, it needs insulated walls and roof and its own heating and cooling. Our crew builds the shell, and licensed electricians and heating and cooling trades come in for their part.
Sunroom remodeling
Some Ontario houses came with a sunroom from an earlier owner that leaks, sweats or just sits empty. We find where the water's getting in, fix the base or the joint with the house, and update the glass and roof so the room gets used.
What Ontario slabs and stucco ask of a sunroom
The slab is the first thing I look at, because most patio slabs here were poured to hold a table and a grill, not walls and a roof. Some are thin, some have settled or cracked, and you can't always tell which from the top. If the slab can't carry the room, we add footings or pour new, and I'd rather tell you that at the estimate than find out after the walls are up.
The other half is the house. Stucco walls and a mix of roof types mean every attachment is a little different, so we open the wall where the room meets it, flash the joint and seal it before the first big rain gets a vote.
Get a written sunroom quote for your Ontario home
Send the form and we'll get back to you within one business day to set a time for me to come out to your Ontario house. I measure, look at the slab or cover the room will sit on, and send a written quote that spells out what's included. The estimate is free, and there's no obligation.
How an Ontario job runs
Call or send the form
You call (909) 738-1566 or send the form, and I set a time to come out to your house. It helps if you're home for that visit, since I'll want to hear how you plan to use the room.
I measure and check the base
I measure, look over the slab, deck or patio cover the room will sit on, and ask how you'll use it. You get a written quote that spells out what's included, so the price isn't a guess.
We handle plans and permits
Once you sign, we prepare the plans, file them with the city and schedule the inspections. City review takes time, so we tell you that up front and keep you posted while it runs.
Our crew builds the room
Our own crew builds it, with licensed electricians and heating and cooling trades coming in where the job calls for them. When it's done, we walk the finished room with you.
Sunroom questions from Ontario homeowners
Do I need a licensed contractor to build a sunroom in Ontario, CA?
Yes, in almost every case. California requires a current state contractor's license for work on any project that needs a building permit, any job that uses hired workers, and any job worth $1,000 or more in labor and materials combined. A bigger job can't be split into smaller contracts to get under that line, and we're fully licensed and insured, so ask anyone you're talking to for their license.
How much can a contractor ask for up front on a sunroom in California?
Under state guidance, a down payment can't be more than $1,000, and on a smaller contract the cap is lower still. After that, the contract lists each payment, tied to work finished or materials delivered, and the rule covers all home improvement work. If someone wants a big check before anything shows up in your driveway, keep looking.
What affects the cost of a sunroom in Ontario, CA?
Size, roof, glass and the shape of the slab or patio cover underneath set most of the price, and the written quote spells out each of those. One city cost people don't expect is extensions, since the first extension on a plan check or permit is free but each extra one the city grants costs $150 on a residential permit. That's one more reason to keep a permitted job moving once it starts.
How long does it take to build a sunroom in Ontario?
Most of the wait usually comes before the build, while the city reviews the plans, and the build itself depends on the size of the room and how much work the base needs. I won't guess at a date before the plans are through review, but once they are, the schedule gets a lot easier to pin down.
What causes leaks in an enclosed patio or sunroom in Ontario?
Most leaks we see start where an old patio cover meets the house, not at the glass. A cover hung off a weak ledger, the board that holds it to the wall, or one with too little slope to shed water usually leaks no matter how good the new walls are. When we enclose an existing cover, I check both before we build on it.
Does a contractor from outside Ontario need a city business license?
Yes, the city requires a business license before a business starts work in Ontario, and contractors based outside city limits use the same application as local ones. They also give the city the job location and value, so it's fair to ask anyone you're hiring whether they've got one.
Get your Ontario sunroom quote started
Call (909) 738-1566 any weekday until 11 PM or send the quote form, because the sooner the plans go to the city, the sooner review starts.
