Sunroom Contractor in Fullerton, CA - Rooms That Fit the House and the Lot
La Palma Sunrooms & Patios builds sunrooms, patio enclosures, screen rooms and patio covers for homeowners in Fullerton, CA, and we turn patios, decks and tired old sunrooms into rooms you'll actually use.
Ask for a sunroom estimate in Fullerton
We look at your patio or deck, measure it and talk through which room fits.
Request an estimateFullerton: older homes and uneven lots
Fullerton is a city of established neighborhoods, and most of the sunroom calls we get here start with a patio slab or a deck that's been out back for a long time. On the older streets near downtown and around Hillcrest Park, a lot of houses have a covered patio someone added years ago, and the homeowner wants to close it in. Up in the hillside neighborhoods toward West Coyote Hills, lots tend to slope, so the room often sits on a deck or a raised base instead of flat concrete.
It's much the same work we do in Buena Park and Anaheim, but the ground here changes more from one street to the next. That's why I look hard at what the room will sit on before we talk about glass or roofs, because an old slab or a tired deck decides more about the job than anything we put on top of it.
How a sunroom job runs in Fullerton
In Fullerton, the city's Building Division issues the permits, and no construction is allowed until the permit is issued, so the start date usually depends on plan review more than on our crew. Before you hire anyone here, check that they hold a state contractor license and the business registration certificate the city requires of anyone doing business in Fullerton. We're licensed and fully insured, and if your job needs a permit, we take care of it, from drawing the plans and filing them with the city to booking the inspections and letting you know ahead of any visit where you need to be home. The price moves mostly with the room type, the glass and insulation you pick, and whether the slab or deck underneath can carry the room as it is, and I write all of that up for your job at the estimate.
I come out to look and measure myself, and I run the work on site with our own crew, which helps on the older Fullerton lots where side yards are tight and materials often go in by hand. We're based in La Palma and work in many of the cities around it, on both the Orange County and Los Angeles County sides, so the same crew that builds here also works in Downey and Cypress.
Services in Fullerton, CA
Patio-to-sunroom conversion
A lot of Fullerton houses already have a covered patio on an older slab, and closing it in is often the simplest way to get a real room out of it. We check the slab and the existing cover first, because whether they can carry walls and glass decides how much of what's there we keep.
Deck-to-sunroom conversion
On the sloped lots in the hillside neighborhoods, the backyard living space is often a raised deck instead of a slab. Before we build a room on one, we look at the framing and footings underneath, since a deck built for chairs and a grill isn't always ready to hold a roof and windows.
Screen room installation
If you mostly want to sit outside in the evening without the bugs, screen room installation gets you there for less than a glass room. We build it on your patio or deck with a solid roof overhead, so you get shade and a dry place to sit.
Sunroom remodeling
Plenty of older sunrooms here were built with single-pane glass and thin roof panels, and they run too hot or too cold to use much. We look at what's worth keeping, then replace the glass, roof or walls so the room works the way you want it to now.
Four season sunrooms
When you want a room you can use like the rest of the house, a four season room with insulated walls, roof and glass is the one to build. We frame it to tie into your house the way an addition does and wire it for outlets and lights, so it feels like part of the home.
Patio cover installation
Some homeowners here want shade over the patio first and walls maybe later. We can build the cover so it's ready to close in down the road, which saves tearing it out if you decide to finish the room.
Your Fullerton sunroom estimate, written up on site
Send us a few details and we'll get back to you within one business day to set a time. I come out to your Fullerton home myself, look at what the room will tie into and write up the room type, the options and the price for your job. The estimate is free, and there's no obligation.
- Phone
- (562) 386-0180
- Location
- La Palma, CA 90623
- Hours
- Mon–Fri: 6 AM–11 PM, Sat–Sun: 7 AM–11 PM
- Credentials
- Licensed and fully insured.
What Fullerton homeowners can count on
We're based in La Palma, CA, with 16 services and 12 service areas on this site, Fullerton among them. Every estimate is a free quote on site with no obligation.
- Based in
- CA
- La Palma
- Services
- 16
- Service areas
- 12
- Licensed and fully insured.
- Free quotes on site.
- Replies within 1 business day.
Frequently asked questions
Does my sunroom project need a permit in Fullerton?
Most likely, yes, because the city's list of work that generally needs a permit includes additions to buildings, decks and patios, and new or changed electrical work like the outlets and lights in a new room. Whether your exact project needs one is the city's call, and I'll tell you what I expect when I come out. When it does, we handle the plans, filing and inspections as described above.
Which building codes apply to a sunroom in Fullerton?
New projects submitted to the city now follow the 2025 California Building Codes along with Fullerton's own amendments, which the city wrote for its local terrain, weather and ground. Those local criteria include earthquake design, so the posts, the roof and the way the room ties into your house get designed for them. If you already filed an application before 2026, it can stay on the 2022 codes in effect then, as long as the permit is issued before the application expires.
How long does plan review take for a patio cover or sunroom in Fullerton?
Smaller projects that need no more than 30 minutes of plan review can typically be reviewed over the counter, and residential patio covers are normally handled that way. A full sunroom addition is usually more involved, and Building & Safety can ask for a more detailed review based on the project's scope or what's already on the property. I'll tell you at the estimate which way I expect your job to go.
How much does a sunroom cost in Fullerton?
The cost comes down to the kind of room, how much insulated glass and wall you want, the roof, and the shape of the slab or deck it sits on. A screen room on a sound patio sits at the low end, and a four season room that needs new footings and electrical work sits at the high end. I write up the room type, the options and the price for your house at the estimate, so you can compare choices side by side.
What causes a sunroom built on an old patio to crack or leak?
Usually it's the base, because an old patio slab or deck was built to hold furniture, not walls and a roof, and it can be too thin, out of level or missing real footings. Water also gets in where the room meets the house if that joint isn't flashed and sealed well. That's why I look at the slab, the deck framing and the wall we tie into before we talk about anything else.
What is the best way to choose between a screen room and a four season sunroom?
Start with how you'll really use the room, because a screen room is for mild evenings and keeping bugs out, while a four season room with insulated walls and glass works like part of the house. A three season room sits in between, with glass but less insulation. I'd rather settle that choice before we build, since insulation and glass are hard to add once the room is up.
Tell us about your Fullerton sunroom project
Call (562) 386-0180 or send the form with a line about how you'd use the room, so the visit starts there.