Four season sunrooms in Riverside CA - a glass room you'll use in July and January
Patio too hot in summer and too chilly on winter evenings? We build a glass room you can heat and cool and use all year.

- Fully licensed and insured.
- Free on-site estimates.
- We respond within 1 business day.
Is a four season sunroom right for your Riverside home?
A four season sunroom in Riverside, CA is a fully enclosed room off your house that's heated and cooled and fitted with all-weather windows, so it's as usable on a July afternoon as on a January evening.
Most people who call us already have a patio slab or a deck out back, or want a room off the back of the house, and they're tired of a space that only works a few months a year. What moves the price is the size of the room, whether we build on what's there or start with a new foundation, the windows and insulation, and how the room gets heated and cooled. The schedule mostly turns on how much planning the room needs, what we find once we look under the patio or deck, and when the windows arrive. I'll measure and look it over in person, then send you a written estimate for your house.
How do you know your patio is ready to become a four season room?
A patio you rarely use
You've got a covered patio or deck that's fine in spring, too hot by early afternoon in summer and too cold to sit in on winter evenings. That usually means the space needs walls, real windows and heating and cooling, not just more shade, and every year you wait is another year that part of the house sits empty.
A sunroom that's an oven by noon
If you already have a glass room and it's unbearable by lunchtime in July or chilly every winter morning, the glass and walls likely weren't built to hold heat in or out, and nothing is doing that work for them. Left alone, it stays a room you walk past while the furniture in it fades.
Needing a room, not a porch
If you're after a family room, an office or a place for guests you can use any month, you need a space that's heated, cooled and tied properly into the house. Building something lighter first and upgrading later usually means opening walls back up to add what should have gone in the first time.
How we build four season sunrooms
I start by looking at what the room will sit on and where it will meet your house, because those are the parts you won't see once it's done and the parts that cause a leak a year later. I also note which wall the room faces and where shade can come from, since that decides how comfortable all that glass will be at 3 in the afternoon. Then we choose the windows and the insulation for the walls, floor and roof with you up front, because they're much easier to put in while the room is going up and adding them later usually costs more. From there our installers and I build the base, frame the room, seal it where it meets the floor and the house wall, set the windows and insulate, and we bring in licensed trades for the electrical and the heating and cooling.
If you don't plan to heat or cool the room, a three season sunroom may suit you better and still keeps out wind, dust and bugs. And if you'd rather start by closing in what's already there, we also build patio enclosures.
Closing in a patio or deck you already have
This suits you if there's a sound slab or deck out back that you'd like to turn into a real room. We check what it's built on and how water runs off it before we put walls and glass on top.
A new room off the back of the house
This suits you if there's nothing to build on yet or the old patio is in the wrong spot. You get the most say in which way the glass faces, though a new foundation usually adds to the cost.
Get a written estimate for your four season sunroom
Send us a few details and we'll reply within one business day to set up a time. I'll come out for a free on-site visit, measure, look at what's there and talk through how you'll use the room, then send you a written estimate with no obligation to go ahead.
(951) 394-2905What Riverside's climate means for a four season sunroom
Once you heat or cool a room, California's energy rules count it as an addition, because it adds heated or cooled space to your house. Those state standards set what the windows, doors and the walls and roof have to do based on climate zone, and the city lists Riverside as zone 10, so that's the zone I plan the glass and insulation around for a room here. How those rules apply to your room is settled by the office that covers your address, and I'll tell you what we've confirmed and what's still up to the city or county.
The city also rates termite exposure in Riverside as very heavy, so before we build on an existing deck or patio cover I check the wood for damage and keep new framing off the soil. We take the same care on jobs in Moreno Valley and Jurupa Valley, and we work in many of the cities around Riverside in Riverside County and San Bernardino County.
What happens after you call about a four season sunroom?
Call or send a request
Call (951) 394-2905 any day from 7 AM to 10 PM, or send the form, and we'll get back to you to set up a visit. A rough idea of the room size is plenty to start.
I visit, measure and listen
I come out, measure, look over the patio, deck or wall we'd build against and talk through how you'll use the room. Then I send you a written estimate, so you have a real number in front of you before you decide anything.
We handle paperwork and build
Once you're ready, we take care of the permit paperwork when your job needs it. Then our installers and I build the room.
Walk through it together
When the room is finished, we walk through it with you, open and close the windows and go over the spots where it meets the floor and the house. If something doesn't look right to you, that's the time to point at it.
Frequently asked questions
What is the difference between a four season and a three season sunroom?
The four season room is the one you heat and cool, with all-weather windows, while a three season room or an enclosed patio usually has no heating or cooling and uses uninsulated windows or screens. In Riverside that difference shows up in July and on cold winter nights, when a three season room acts more like a porch than a room.
How much does a four season sunroom cost in Riverside, CA?
A 200 square foot four season sunroom in Riverside County usually costs about $30,000 to $60,000 per job, which is the going range in the area, not a quote for your house. Larger rooms that need a foundation and come with heating and air conditioning land at the high end of local prices. Your written estimate gives the figure for your own room.
How do I keep a glass sunroom from overheating in the Riverside sun?
Plan the shade and the direction the glass faces before anything is built. Federal energy guidance for hot, cooling climates favors windows on the north side and plenty of shade on south-facing glass, and shade from trees, overhangs, shutters or solar screens cuts the heat coming through glass in full sun. Insulated windows and a heating and cooling system handle the rest.
How much of a down payment can a sunroom contractor ask for in California?
In California, a contractor can ask for no more than $1,000 or 10 percent of the total contract price as a down payment, whichever is less. That limit comes from the Contractors State License Board, which licenses and regulates the state's construction industry to protect consumers.
How do I know if a sunroom contract in California is fair?
Read the notices and disclosures before you sign, because state rules require a home improvement contract to include them to protect you. Any change to the contract after that has to be written, legible and easy to understand, and it has to tell you about your right to cancel.
Should a four season sunroom open into the house or be closed off?
It can go either way, and the choice changes how the room is classed. A national sunroom specification calls a heated or cooled room that opens into the house habitable, and a room sealed off from the house with its own heating and cooling non-habitable. We settle this with you at the first visit, along with the windows and insulation, because it shapes the rest of the plan.
Riverside, CA
Start planning your four season sunroom
Call or send the form with the rough room size, whether it opens into the house and which wall it faces, and I'll have a head start before I come out.




