Three season sunrooms in Fountain Valley CA - a bright room on a sound base
Your patio sits empty because of the sun, wind or bugs. We close it in so you'll use it most of the year.
- Fully licensed and insured.
- Free on-site estimates.
- Expect a reply within 1 business day.
Is a three season sunroom the right room for your house?
A three season sunroom in Fountain Valley is a room closed in with uninsulated windows or screens and no heating or cooling. You get a bright, sheltered space off the house, usually as a small addition, for less than a fully heated and cooled room.
Most people who call us have a patio that gets too much sun, wind or bugs to enjoy, and they want a room out there without paying for a full addition. A room that's fully insulated, heated and cooled costs a good deal more to build, so the honest question is how much comfort your budget should buy, and some homeowners find a lighter patio enclosure is enough. The price of a three season room moves mostly with its size, whether it needs a new foundation, the glass or screens you choose and any electrical work, while the schedule turns mostly on the city's plan check and permit, which we prepare and file for you. Your written estimate spells out what's included before you decide anything.
How do you know a three season room would help your patio?
Patio empty by afternoon
If the sun and the breeze send you indoors by mid-afternoon, the space usually needs walls and a roof more than it needs heating and cooling. Each year you wait is another season of a patio you look at instead of use.
Bugs and dust everywhere
Cushions that need wiping every time you sit down and bugs at dinner usually mean the patio is simply too open. Glass or screens close that off, and the sooner they're in, the less you spend cleaning and replacing outdoor furniture.
Cracks or sag underneath
A cracked slab or a patio cover that dips in the middle usually means the base or the posts have moved. That's worth knowing before anyone puts walls on it, because building over a base that's moving only makes the repair larger later.
Rooms people compare with this one
Patio enclosures
Worth a look if you already have a sound cover and mostly want to keep out wind, dust and bugs with less building.
Custom sunrooms
For a room with an unusual shape, a tricky roofline or details that need to match an older house.
How we build a three season sunroom
Before you choose this room, I'll tell you honestly that without heating or cooling it will feel cooler than the house at times, because a small addition is harder to hold at the house's temperature, and we talk through whether that suits how you'll use it. For many yards it's the right room, and we build it well for what it is, starting with the slab, deck or cover it will stand on, then the framing, the windows or screens, the roof tie-in, any standard electrical you've asked for and a clean site at the end. If the room goes under an existing patio roof, one maker's instructions call for raising the front of that roof several inches above the new walls and bracing it while they go in, which is why I look at your cover closely before we price the job.
If you'd rather keep the build lighter, our patio enclosures close in a covered patio with less work. When the room needs an odd shape or has to match an older house closely, we design it as one of our custom sunrooms.
Windows on every wall
This suits people who want wind, dust and rain kept out so they can sit there on cooler evenings. It costs more than screens, but it's the most sheltered version of this room.
Screens with some glass
This suits yards where the breeze is the point and the bugs are the problem. You keep the open-air feel and still have a wall of glass where the wind or the afternoon sun comes from.
Under the cover you have
If your patio cover and slab check out, building under them can keep the cost down. We only recommend it after I've looked underneath, because walls are only as sound as what holds them up.
Get a written estimate for your three season room
Send the form and we'll reply within one business day to set up a free on-site estimate, with no obligation. If you'd rather talk it through, call (657) 329-2023.
Call (657) 329-2023Why Fountain Valley homeowners call Fountain Valley Sunrooms & Patios for three season rooms
The owner on site throughout
I come out to measure and look over every job myself, and I work on site beside our crew through the build. The person who wrote your estimate is the one making sure the room is built that way.
We check the base first
Growing up on a farm, I learned to look under anything before trusting it, so the slab, deck or cover gets checked before we write a number. If it needs work, you hear about it in the estimate, not halfway through the build.
Licensed and insured, questions welcome
We're fully licensed and insured, and we're glad to answer questions about it before you sign. California requires every contractor to keep a $25,000 bond on file with the state licensing board, and it's fair to ask any contractor about theirs.
Based in Fountain Valley, working nearby
We've been in business since 2023. We're based in Fountain Valley and work in many cities around it across Orange County and nearby, including Huntington Beach, Westminster and Costa Mesa, where we see a lot of single-family yards with a slab out back and an older cover over it.
A room is only as good as what it stands on, so please send us a note about your patio or call (657) 329-2023, and I'll come take a look.
What happens after you call about a three season room?
You call or send a message
Tell us a little about your patio and what you'd like the room for. We set up a visit at a time that suits you.
I measure and look underneath
I measure, check what the room will stand on and ask how you plan to use it, then send a written estimate in plain words. It spells out what's included and what isn't, so you aren't guessing about the price.
We handle permits and plans
If you go ahead, we prepare the plans, file them with the city and meet the inspector, and we tell you early if we need anything from you, such as HOA approval. Fountain Valley sends every project through its Planning Department too, so your plans get a planning check along with the building review.
We build and walk through
I'm on site with our crew until the room is finished. Then we walk through it together so you can see every part before we call it done.
Common questions
What does a three season sunroom cost in Orange County?
A three season room addition in Orange County usually costs about $120 to $170 per square foot with builder-grade materials and standard electrical work. Larger rooms that need a foundation and have heating and air conditioning sit toward the higher end, and a typical estimate leaves out insulation, heating and cooling equipment, plumbing and permits, which add to the total when the job needs them. Our written estimate lists what's included, so you can see where your room falls.
What is the best way to choose between a three season and a four season sunroom?
Start with how much comfort your budget should buy, because a four season room is fully enclosed, heated and cooled, with all-weather windows, and it costs significantly more to build. If you'll mostly use the room in mild weather and don't mind it running cooler than the house now and then, a three season room is usually the better value. If you want it to feel like the rest of the house every day, a four season sunroom is worth the price.
Does a three season sunroom count as living space?
By the national sunroom industry's own specification, usually not. That specification treats a room that's closed off from the house, has glass or plastic in its openings and has no heating or cooling as space that isn't meant for everyday living. So it's best thought of as a sheltered patio you can use much of the year, not a spare bedroom.
Who issues building permits for a sunroom in Fountain Valley?
The City of Fountain Valley's Building & Safety Division issues permits to build, enlarge or change a building or structure, and its list of exempt work names sheds, not sunrooms. Whether the city treats your room as a patio enclosure or a room addition is a question for the division, so please ask it about your plans. When your project needs a permit, we prepare the plans, file them and meet the inspector.
How close to the back property line can a sunroom go in Fountain Valley?
In Fountain Valley's single-family zones, a one-story attached addition can come within 10 feet of the rear property line if it's no wider than half the lot, and the rear yard has to keep 1,000 square feet of open space. The city also caps lot coverage at 60%, counting accessory structures, or 50% on lots of 10,000 square feet or more. I measure your house and yard against those limits before we settle on a room size.
How do I know if my patio slab can hold a sunroom?
Have the slab looked over before any walls are planned, because cracks, settling or a thin pour can change what the room needs underneath. If the slab may be cut, a City of Milpitas handout advises checking first whether it's post-tensioned, built with steel cables pulled tight inside it, since cutting one can be very dangerous and expensive to repair. I check the base on every estimate visit, so you'll know where you stand before deciding.
Tell us about your patio and cover
If you send the rough size you have in mind, a few photos of the patio and whether there's already a cover or slab, I can come out ready to talk about your actual yard.