Sunroom Contractor in Ontario, CA - Rooms Built on the Patio You Already Have
Solcraft Montclair Sunrooms & Patios is a sunroom contractor serving Ontario, CA. We turn covered patios, decks and slabs into rooms you'll actually use, from screened three season rooms to fully insulated four season rooms.
Get your Ontario sunroom estimate started
I measure your patio or deck and check the slab, footings and roof tie-in.
Request an estimateOntario: slab patios behind single-story homes
On our jobs, Ontario looks like a lot of established neighborhoods of single-story homes with a slab patio out back, plus newer subdivisions where the houses are two stories and the yards are tighter. Most of the calls we get here sound like the ones we get in Montclair and Chino. Someone has a covered patio or a deck they barely use and wants a real room out of it.
On the older lots, the question is usually whether the slab and the old patio cover can carry a room, because most were built for shade, not walls and glass. On the newer ones, the room's footprint and how it ties into a two-story wall drive the design.
Working in Ontario: permits, licenses and what moves the price
The city's Building Department issues permits in Ontario, and it reviews the plans and inspects the work, so a room that needs a permit has a plan review step before we build and inspections along the way. When a job needs one, we prepare the plans, handle the city paperwork and keep you posted on where it stands, and I'll tell you at the estimate who's pulling it. Before you hire anyone, look up their state contractor license and ask whether they hold an Ontario business license, since the city requires one before a business works here, contractors from outside the city included.
The price moves with the size of the room, whether it's a three season or four season build, how much insulation and glass goes in, and whether the slab or deck under it needs work first. The schedule turns mostly on the city's review and on getting windows and panels in, and you'll get your own figures from the estimate. Ontario jobs run the same way as ours in Montclair and Pomona, with our crew lead running the build alongside our installers.
Services in Ontario, CA
Patio-to-sunroom conversion
A lot of Ontario backyards already have a slab and a patio cover, which is most of a room's footprint sitting there. We check whether the slab and the cover can carry walls and glass, then enclose it or rebuild the roof so the room holds up.
Four season sunrooms
If the room off your kitchen or family room is going to be lived in, not just visited, four season sunrooms are the build that makes sense. We insulate the floor, walls and roof and settle heating and cooling up front, so it works like the rest of your house.
Three season sunrooms
Plenty of homeowners here mostly want a shaded room for weekends and evenings, and they don't want to pay to heat and cool it. A three season room costs less than a fully insulated one and still keeps out bugs, leaves and dust off the yard.
Deck-to-sunroom conversion
Some Ontario homes have a raised wood deck out back instead of a slab. Before we build on it, we check the footings and framing, because most decks were built for people and a grill, not a roof and glass.
Patio cover installation
On newer homes with a bare slab, a patio cover is often the first step, and it can be built to take walls later. We size the posts and the roof tie-in for that from the start, so you're not tearing it out when you're ready to enclose it.
Sunroom remodeling
Older Ontario houses sometimes come with a patio enclosure someone added years ago that leaks at the roof line or never got insulated. We'll tell you whether it's worth reworking the roof, glass and floor, or whether starting over costs you less in the long run.
Get a free on-site sunroom estimate in Ontario
Send the form and we'll get back to you within one business day to set a time. I come out to your Ontario home myself to look at the space and measure, and you get a free estimate with no obligation to go ahead.
- Phone
- (909) 738-1507
- Location
- Montclair, CA 91763
- Hours
- Mon–Fri: 8 AM–9 PM, Sat–Sun: 6 AM–9 PM
- Credentials
- Licensed and fully insured.
What Ontario homeowners can count on
We're based in Montclair, CA and offer 16 sunroom and patio services across 12 cities, Ontario included. Every job starts with a free on-site estimate.
- Based in
- CA
- Montclair
- Services
- 16
- Service areas
- 12
- Licensed and fully insured.
- Free on-site estimates.
- We reply within 1 business day.
Frequently asked questions
How much does a sunroom cost in Ontario, CA?
The cost of a sunroom in Ontario comes down mostly to its size, whether it's a three season or four season room, and what shape the slab or deck under it is in. Insulation, glass, electrical work and any plans and permit work add to it, so you'll get your own number once I've measured.
Do I need a licensed contractor to build a sunroom in Ontario, CA?
Yes, in California anyone who contracts for work that needs a building permit, uses employees or runs $1,000 or more in combined labor and materials needs a current license from the state licensing board. The board only exempts small jobs that need no permit, use no employee labor and total under $1,000, and a bigger job can't be split into smaller contracts to get under that line. A sunroom built by a crew isn't one of those jobs, so check the license before you sign.
How much can a contractor ask for as a down payment in California?
California's licensing rules say a contractor can't ask for or take a down payment of more than $1,000 or 10 percent of the total contract price, whichever is less. After that, payments are listed in the contract and tied to work done or materials delivered, and the rule covers every home improvement project, a sunroom included.
What happens if my Ontario building permit needs an extension?
The city doesn't charge for the first extension on a plan check or permit, but each extension it grants after that costs $150 on a residential permit. We line up materials and the crew before the work starts, so the job is less likely to need a second one.
How long does it take to turn a patio into a sunroom in Ontario?
Most of the time goes into the steps before the build, which are the plans, the city's review when the job needs a permit, and getting windows and panels in. The build itself depends on the size of the room and whether the slab or patio cover needs work first, and I'll walk you through the schedule for your job at the estimate.
What is the best way to turn a covered patio into a year-round room in Ontario?
The best way is to build it as a four season room, with an insulated floor, walls and roof, not just glass hung under the old patio cover. Most patio covers and slabs weren't built to carry a room, so I check both first and we decide on insulation and the floor before anything gets built.
Plan your Ontario sunroom with us
Call (909) 738-1507 or send the form, and I'll tell you straight what your space can and can't take.