Four season sunrooms in Rialto CA - a room you can use in July and January
Patio too hot to sit on most of the summer? We close it in with insulated walls and glass that keep the room usable all year.

- Licensed and fully insured.
- Free quotes on site.
- We reply within 1 business day.
What goes into a four season sunroom in Rialto?
A four season sunroom in Rialto is a closed-in room added to your house, with insulated walls, roof and glass, so it stays comfortable enough to use every month of the year.
Most people who call me have a patio out back that's too hot to use half the year, and they want a real room there. A four season room does that, where a three season sunroom is cheaper to build but runs hot in August and cold in January. The price mostly moves with the size of the room, the windows you pick, and whether you want power, heating and cooling run in. The schedule mostly turns on the city's permit review and the fire zone your lot sits in. When the room needs a permit, we handle the application and the inspections with the city. We're based in Rialto and work in the cities around it, and your written quote gives you the real number for your house.
How do you know it's time for a four season room?
Patio too hot to use
If the patio cooks by early afternoon and nobody goes out until dark, a cover alone usually won't fix it, because the heat comes in from the sides as much as from above. Every summer you wait is another season of space you own but can't use.
Sunroom bakes by noon
An older room that turns into an oven most days usually has glass that lets too much sun through or a roof with little insulation in it. Your AC works harder trying to keep up, and rugs and furniture fade in the meantime.
Door shut all winter
If you close the room off from November to March, it was likely built as a three season room or the glass loses heat fast. You're paying for a room you only use part of the year, and it won't get better on its own.
Rooms people weigh against this one
Three season sunrooms
A lighter build for people who only plan to use the room in the mild months and don't need it heated or cooled.
Patio enclosures
Closes in the patio against wind, dust and bugs when you want outdoor space you can use, not a full room.
How we build a four season sunroom
I measure and check what we're building on, then our crew frames the walls, ties the roof into your house, sets the windows and doors, seals every joint so the room stays dry, and finishes the inside so it feels like part of the house. The windows decide how comfortable this room feels, so before you choose, I show you the rating labels on what we'd use and explain what those numbers mean for summer heat. You pick the glass knowing what you're getting, not off a brochure.
Not everyone needs a full year-round room. If you mostly want shade and a spot out of the wind, a patio enclosure costs less and goes up with less work. If you'll use the space spring through fall and don't care about heating it, a three season sunroom is the simpler build, and I'll tell you so if that fits better.
Solid insulated roof
This suits most rooms here, especially ones facing afternoon sun, because it keeps the heat off your head and the room quieter. It's what I'd pick for a room you want to sit in on a July afternoon.
Glass or skylight roof
This suits people who want the sky overhead and a room that feels open. It runs warmer in an Inland Empire summer, so I'd only steer you to it on a shaded side of the house.
Get a written quote for your four season room
Send the form and we reply within 1 business day to set up your free on-site estimate, with no pressure and no obligation. Calling (909) 546-5002 works too.
Call (909) 546-5002Why Rialto homeowners call Suncraft for a four season room
I measure, our crew builds
I come out myself to look at the house and measure, and our own crew does the building with me on site. The person who heard what you want is the one standing there when it goes up.
Licensed and fully insured
We're licensed and fully insured. That's the first thing to ask any contractor before they start work on your house, and we'll show you ours.
A straight no when needed
I started this business in 2023 after learning framing and glass work on other builders' crews. If an idea isn't going to work for your house, I'd rather tell you no up front than build it and have you regret it.
Fire zone rules built in
If your Rialto house sits in a High or Very High fire hazard zone, the city says new construction and renovations must follow the wildland-urban interface building codes, which harden a house against catching fire. We build the room to what your zone calls for and take it through the city's inspections.
What matters most is a room that stays dry and glass that holds up to a Rialto summer, so tell us about your room or call (909) 546-5002.
What happens after you call about a four season sunroom?
Call or send the form
You call (909) 546-5002 or send the form, and we get back to you to set a time for me to come out. Mornings, evenings and weekends usually work.
I measure and look around
I come out, measure, look at the slab or deck and how your house is built, and we talk through what you want the room for. A reading room and a playroom don't need the same things, so have a rough idea of how you'll use it.
Written quote, then permits
You get a written quote that spells out what's in the room, and once you say go, we handle the permit application through the city's online permit center. The city lists 30 days for plans in review, so that wait sits at the front of your schedule.
Build through final inspection
Our crew builds the room with me on the job, and the city inspects the work along the way. We're done when it passes final inspection and you've walked through it with me.
Common questions
How much does a four season sunroom cost in Rialto, CA?
Across the US, a four season sunroom usually costs about $120 to $175 per square foot in total, so the size of the room does most of the talking. That's a national figure, not our price, and the written quote I give you after measuring is what tells you the number for your house.
Who issues building permits for a sunroom in Rialto?
The Rialto Building Department handles plan check, permits and inspections in the city, and applications go through its online permit center. We handle the application and inspections for you, and if you want to ask the city something yourself, you can reach the department at rialtobuilding@rialtoca.gov or 909.820.2505, option 1.
How do I compare sunroom windows for heat and summer sun?
Look at two numbers on each window's rating label. The U-factor tells you how well it keeps heat in, and lower is better, while the solar heat gain coefficient tells you how well it blocks unwanted sun, and a low number helps keep the room cool in summer. A higher solar number can help in winter, so pick by the season that matters more to you, which here is usually summer, and you can check any label's ratings with the online label search.
How do I check if my Rialto house is in a fire hazard zone?
Look up your address with the city's fire hazard zone check, and do it before anything else, because the zone decides whether the fire zone building rules apply to your room. If you're in a Very High zone, the city also says you must keep 100 feet of defensible space around your buildings, which is ground kept clear of things that burn easily.
How much can a contractor ask for up front on a sunroom in California?
State rules cap the down payment on a home improvement job at $1,000 or 10 percent of the total contract price, whichever is less. Every payment after that has to be listed in the contract and tied to work completed or materials delivered to your house.
Which contractor licenses cover sunrooms and patio work in California?
Under state rules, a general building contractor's main business is structures that shelter people and take at least two unrelated trades to build. The state's awning license covers patio covers but not patio enclosures, and a residential remodeling license leaves out load-bearing work like foundations and roof structures, so ask whether your room changes those parts of the house.
Start planning your four season sunroom
Have your address, a rough room size and your fire zone status handy when you call or send the form, and the first visit gets a lot further.




