Four season sunrooms in Fountain Valley CA - a room you can use all year
Your patio or back room sits empty because it's too hot by afternoon and too cool at night. We build a room you'll use every month.
- Fully licensed and insured.
- Free on-site estimates.
- Expect a reply within 1 business day.
What is a four season sunroom, and does your house need one?
A four season sunroom is a fully enclosed room added to your house. It's heated and cooled and has all-weather windows, so in Fountain Valley you can use it on a hot summer afternoon or a cool winter evening like any other room.
At Fountain Valley Sunrooms & Patios, we build these rooms in Fountain Valley and in many cities around it across Orange County. Most people who call us have a patio or back room they hardly use because it's too warm by afternoon and too cool after sundown. The price mostly comes down to the size of the room, what it will stand on and the heating and cooling you choose. The schedule mostly turns on the city's plan review, since a room added to your house needs a permit before we start. Your written estimate spells out what's included for your room, so you can weigh it without guessing.
How can you tell your patio or sunroom isn't working for you?
Patio empty by afternoon
If your covered patio sits empty from lunchtime on because the sun is too strong, and again after dark because it turns cool, the space isn't working for the way you live. Every season you wait is another year of looking at that part of your yard through the glass door.
Sunroom too hot to use
An older sunroom that bakes by noon and turns chilly at night usually has glass that isn't insulated and no heating or cooling of its own. Left alone, it tends to become a storage room, and the sun keeps fading whatever you put in it.
Space heater in the back room
If you drag a space heater out in winter and a fan in summer, the room was built for shade, not for living in. Patching it a piece at a time usually costs more than planning the room properly once.
Lighter rooms worth comparing
Three season sunrooms
Suits a room you'll mostly use in fair weather, and it asks less of your budget up front.
Patio enclosures
Closes in the patio you already have, which is often the simplest way to keep out wind, leaves and bugs.
How we build a four season sunroom
A four season room is meant to be lived in, so we plan the insulation, the windows and the heating and cooling together in the first drawing. I'd rather you decide those once than pay to open walls later. Planning them together is also the plain way to meet the state's energy code, which sets efficiency requirements for additions like this one. Once the plans are approved, our crew frames the room, insulates the walls, floor and roof, sets the windows, ties in the heating and cooling, and finishes the inside so it feels like part of the house. Then we clean up after ourselves.
Not everyone needs a room this complete. If you mostly want to sit out on mild days, a three season sunroom or one of our patio enclosures may serve you just as well for less. If that's so, I'll tell you plainly rather than talk you into more room than you need.
Open to the house
With the wall taken out or a wide opening left, the room carries straight on from your living space, and one sunroom industry specification calls a room like that habitable. It suits families who want the kitchen or family room to simply continue into the sunroom.
Closed off with its own system
A room shut off behind a door, with its own heating or cooling, is what that same specification calls non-habitable. It suits a reading room, studio or plant room you want to run on its own, and the city decides how it treats your room when it reviews the plans.
Get a written estimate for your four season sunroom
Send the form and we'll reply within one business day to set up a free on-site visit, with no obligation. If you'd rather talk it through, call (657) 329-2023.
Call (657) 329-2023Why Fountain Valley homeowners ask us to build their four season room
I measure every job myself
I started this business in Fountain Valley in 2023 after years on sunroom and patio jobs, and I still come out to measure and look over the slab, deck or cover before anything is drawn. I grew up on a farm, where you check a barn floor before you drive a tractor onto it, and a room deserves the same care.
Sized to your Fountain Valley lot
On single-family lots the city keeps 1,000 sq. ft. of the rear yard as open space and caps lot coverage at 60%, or 50% on parcels of 10,000 sq. ft. or more, counting accessory structures. We work out where your room fits within those limits before we draw it, so its size is settled before the plans go in.
Fully licensed and insured crew
We're fully licensed and insured. That matters when a crew is opening up the back of your house, because the risk of the work shouldn't sit with you.
When you're ready, please send us a message or call (657) 329-2023, and I'll come out and have a look.
What happens after you call about a four season sunroom in Fountain Valley?
Call or send a message
Call us or use the form, and we'll set a time for me to come see the house. Our phones are answered into the evening on weekdays and early on weekends.
I measure and look underneath
I measure, check what the room will sit on and ask how you plan to use it. Then you get a written estimate in plain words that spells out what's included, so you know what you'd be paying for before you decide.
We handle plans and permits
If you go ahead, we prepare the plans, file them with the city and tell you early what we need from you, such as any HOA approval. The city reviews the plans before work starts and inspects the build as it goes, and we meet the inspector.
Build, then walk through together
I'm on site with our crew until the room is finished. Before we call it done, we walk through it together so you see every part of it with me.
Common questions
How is a four season sunroom different from a three season room?
A four season sunroom is heated and cooled and has all-weather windows, while three season rooms and enclosed patios generally aren't heated or cooled and have uninsulated windows or screens. If you want to use the room in July and January alike, choose the four season room. If you mostly want shade and fresh air, the lighter room usually serves.
How much does a four season sunroom cost in Orange County?
A county cost guide puts sunrooms in Orange County at about $20,000 to $120,000 per job, and that range covers sunrooms of every kind, not four season rooms alone. Larger rooms that need a foundation and have heating and air conditioning sit toward the higher end. Your own figure comes from the written estimate after I've seen the house.
Do I need a permit to build a sunroom in Fountain Valley?
Yes. Fountain Valley requires anyone who plans to build, enlarge or alter a building to apply for permits first through the city's Building & Safety Division, and the same division reviews the plans and inspects the work. It's also the office to ask how the city will treat your room if it's open to the house or closed off with its own heating and cooling.
How do I get plans ready for a sunroom permit in Fountain Valley?
The city's online Permit Center takes plans as PDFs, and they should include structural calculations, a soils report and your homeowners association approval documents. We prepare the plans and file them, so the part that usually falls to you is the HOA approval, and I'll let you know early what's needed.
What is the best way to insulate a four season sunroom?
Build the insulation in from the start. A county cost guide notes that insulated windows and insulation in the walls, floor and roof are much easier to install while the sunroom is being built, and adding them later can often cost more. That's why we settle it in the first drawing.
Will a four season sunroom raise my energy bills and property taxes?
It can. A national cost guide lists higher property taxes from the added square footage, possibly higher insurance rates, and higher energy bills for heating and cooling a four season room. Those running costs are worth weighing alongside the build itself when you choose between room types.
Start planning your four season sunroom
Call (657) 329-2023 or send the form, and if you have your lot size and a few photos of your back yard handy, we can talk through what fits before I come out.