Sunroom contractor in Fullerton, CA - rooms built on what can hold them
Hacienda Heights Sunrooms & Patios is a sunroom contractor building sunrooms, patio enclosures and screen rooms for Fullerton, CA homeowners, set on slabs, decks and footings we've checked can carry the weight of the glass.
- Licensed and fully insured.
- Free in-person estimates.
- Expect a reply within 1 business day.
Services in Fullerton, CA
Patio-to-sunroom conversion
If you already spend evenings on a covered patio off the family room, converting it is usually the shortest path to a sunroom. We keep whatever is still sound, often the slab or the cover, and build the walls and glass around it.
Screen room installation
Plenty of homeowners here want the backyard without the bugs, and screen room installation gets you that for less than full glass. We frame it like a sunroom, so glass panels can go in later without starting over.
Deck-to-sunroom conversion
On sloped lots the outdoor space is often a raised deck, and most decks were built for chairs and a grill, not glass walls. We check the posts, beams and footings first and reinforce or rebuild them before the room goes on.
Patio cover installation
A slab that bakes in the afternoon sun is often a patio cover job before it's ever a sunroom job. We set the posts and beam so a future enclosure can tie into them if you decide you want walls.
Sunroom remodeling
Older sunrooms we see around here tend to leak at the roof joints or run hot behind single-pane glass. We replace the glass, roof panels or framing that's failing and leave alone what still works.
Four season sunrooms
When you want a room you'll actually use in August and January, a four-season room with insulated glass and a solid roof is the one to build. We tie it into your house and its heating and cooling, so it lives like the rest of your rooms.
Fullerton, CA properties and local conditions
A sunroom is mostly glass sitting on a frame, and when the ground shakes, that frame has to flex without cracking panels or pulling away from your house. The city's design criteria put structural work here in Seismic Design Category D, E or F, with the category for your lot read from the U.S. Geological Survey's maps, so we size the footings, posts and the connection to your wall for your address instead of an average one. It's not the exciting part of the room, but it's the part that decides whether the doors still close after the next quake.
Many houses here are stucco, and a new room has to meet that wall and the existing roof without giving rain a way in. We flash and seal where the new roof meets the old one, because that seam is where most of the sunroom leaks we get called about start.
What it takes to build a sunroom in Fullerton
Building permits here come from the City of Fullerton, and the city doesn't allow construction until the permit is issued. It reviews the plans first and issues the permit once they're approved and the fees are paid, so plan review usually sets the start date more than our calendar does. Before you hire anyone, ask for their state contractor license and their Fullerton business registration certificate, because the city requires that registration of anyone working here and may ask for proof of the state license before it issues one. We're licensed and fully insured, and when your job needs a permit, we do the paperwork and work through the inspections with you. The price mostly comes down to the room's size, the glass and roof you pick and how much work the slab or deck needs underneath, and your written estimate spells that out for your house.
Getting a room into a Fullerton backyard is its own small job. On the hillside streets the side yards can be narrow and steep, so we plan how the long roof panels and glass get carried back before the delivery truck shows up. Fullerton is a short drive from our base in Hacienda Heights, and it's the same crew you'd get in La Puente or Whittier.
Get a free on-site sunroom estimate for your Fullerton home
We reply within one business day to set a time, and then I come out to your Fullerton house to look and measure myself. The estimate is free, it's in writing, and there's no obligation to go ahead.
(626) 269-6285How a Fullerton sunroom job goes once you call
Tell us what you have
Call or send the form and tell us about the patio, deck or old sunroom and how you'd like to use the space. You don't need drawings, since a rough idea is plenty to start.
I look, measure and ask
I come out myself to measure, look hard at what the room will sit on and ask how you plan to use it, so it helps if you're home for this one. You get a written estimate afterward, so you know what you're getting into before you sign anything.
We handle the permit side
We sort out the permit for your Fullerton address and get the plans in front of the city. Smaller residential work like a patio cover is normally reviewed over the counter when it needs no more than 30 minutes of plan review, while a full room may get a more detailed review depending on its size and what's already there.
We build and walk through
My crew and I do the building, and once we've agreed on access you don't need to be home every day. When it's finished, I walk through the room with you before we call it done.
Frequently asked questions
Does a sunroom need a permit in Fullerton?
Usually, yes. The city's list of work that generally needs a permit includes additions and patios, and most sunrooms are one or the other. If you want outlets, lights or a mini-split in the room, new electrical and mechanical work generally needs a permit too, and we confirm all of it for your address before anything is scheduled.
Which building codes apply to a new sunroom in Fullerton?
Projects submitted now are reviewed under the 2025 California Building Codes with the city's own amendments, which adjust the state codes for Fullerton's terrain, climate and geology. If you filed an application before those codes took effect, it can still follow the 2022 codes as long as you get the permit before the application expires. We draw the room to whichever set your project falls under.
How much does a sunroom cost in Fullerton?
Your price comes from three things, the size of the room, the kind of room and what it sits on, and the written estimate puts a real number on each. A screen room costs least, and a four-season room with insulated glass, a solid roof and its own heating and cooling costs the most. Footing work under an old slab or deck and new electrical add to it, while keeping a sound patio cover can bring it down.
How do I know if my deck or patio slab can hold a sunroom?
You find out by looking at what's under it, and that's the first thing I check at the estimate. A slab needs enough thickness and solid edges to carry walls and glass, and a deck needs posts, beams and footings sized for a lot more than patio furniture. If it can't carry the room, we tell you and add footings or rebuild the frame before anything goes on top.
What is the best way to keep a sunroom cool in Fullerton?
Choose the glass and roof for the sun before you choose anything else, since glass is great at letting heat in and not much else. Low-e glass, which has a thin coating that turns back heat, a solid insulated roof over the sunniest part and windows that open on two sides for a cross breeze do more than a bigger air conditioner. If you want to sit out there on summer afternoons, a four-season room with its own cooling is the honest answer.
Can I apply for a sunroom permit myself in Fullerton?
Yes, property owners can apply, and so can licensed contractors or an authorized agent. If you're doing the work yourself, you sign the owner-builder statement state law requires or provide a certificate of insurance, and a contractor who applies has to show a workers' compensation insurance certificate. When we build the room, we take care of that paperwork.
About Fullerton, CA
Fullerton is a real mix, with older single-story homes on flat streets and newer houses on hillside lots that slope toward the back fence. People here use the outdoors a lot, between the city's trails, Hillcrest Park and West Coyote Hills, and that's usually why they call. They want a room that keeps the yard close without the bugs, the glare or the chill after sundown.
On the hills, the job is mostly about building level on a slope. On the flatter streets it's more often an old slab or a tired patio cover that has to carry more than it was built for, the same calls we get back home in Hacienda Heights and over in Norwalk. Either way, the ground gets a say in the room before we do.
Explore the services
Hacienda Heights, CA
Tell us about your Fullerton project
We answer seven days a week, from 7 AM to 11 PM on weekdays and 6 AM to 10 PM on weekends, so call (626) 269-6285 or send the form whenever the patio is on your mind.