Sunroom contractor in Costa Mesa - rooms that fit older patios and decks
Suncrest Placentia Sunrooms & Patios builds sunrooms, patio enclosures and patio covers for homes in Costa Mesa, CA, with the most care on the parts you don't see, like the slab under the room and where it joins your house.

- Service area
- Costa Mesa, CA
- Call
- (657) 226-2045
Older single-story homes across Costa Mesa
We're based in Placentia and spend most weeks in north Orange County cities like Brea and Fullerton, and we come down to Costa Mesa and its neighbors, Santa Ana and Irvine, for the same kind of work. The calls here usually start the same way, with a patio or a small backyard that doesn't get used as much as it could.
A lot of the houses we see here are older single-story homes on modest lots, with a concrete patio out back that was poured long before anyone planned to put walls and a roof on it, and some have a wood deck instead. That's why I spend the first visit on what the room will sit on and how it will meet your wall and roofline. An old slab can look fine and still need footings, the concrete that carries the weight at the edges, added before it can hold a room. Some of that I can't know until it's opened up, so I'll tell you where the unknowns are before we start.
Our services in Costa Mesa, CA
Many Costa Mesa backyards already have a concrete patio, often under an old cover, and enclosing it is usually the simplest way to get a room you'll actually use. We check the slab and the cover first, then close it in with walls and windows sized to how you plan to use the space.
When you want a room you can sit in on a hot afternoon, not just a covered patio with walls, the old slab has to carry a heavier insulated roof and real walls. We check whether it can, add footings where it can't, and tie the new roof into your house so water runs off instead of in.
Some homes here have a raised wood deck off the back door instead of a slab, and before we close one in I check whether its posts and framing can carry walls, windows and a roof. If they can't, a deck-to-sunroom conversion starts with reinforcing or rebuilding the frame underneath, and you'll know that before we price the room.
Some homeowners here just want shade over the patio, and a cover is the right call when a full room would cost more than the use you'd get out of it. We set the posts on proper footings and attach the cover to the house so it sheds water away from your wall.
If you want the evening air without the bugs, a screen room on your patio gets you there for less than glass walls. We build it on a slab and frame we've already checked, so closing it in with glass later is an option if you change your mind.
Older homes in Costa Mesa sometimes come with a patio room added years ago that leaks where it meets the house or turns into an oven by midday. We find where it's failing, whether that's the flashing, the metal that sheds water at that joint, or a thin roof that lets the heat straight through, and fix or replace what needs it.
Every service we offer
Sunroom additions
Four season sunrooms
Three season sunrooms
Patio enclosures
Custom sunrooms
Sunroom construction
Sunroom remodeling
Screen room installation
Patio-to-sunroom conversion
Deck-to-sunroom conversion
All season rooms
Enclosed patio rooms
Solarium installation
Patio cover installation
Sunroom design
Vinyl sunrooms
What happens when you call us in Costa Mesa
Call or send the form
Call (657) 226-2045 or fill out the form with a few lines about your patio, deck or yard. We set up a time for me to come out to your Costa Mesa home, and it's easiest if you're there so we can talk it through.
I look and write it up
I come out myself, look at the spot and what the room would sit on and join, and ask how you plan to use it. Then you get the plan and the estimate in writing, showing what drives the price, which is mostly the room type and the shape the slab or deck is in.
We handle the permit paperwork
We pull the permit with the city and take care of what it asks for, and that review is usually the biggest wait before building starts. The other thing that can move the schedule is what turns up once an old slab or deck is opened, and if it changes the plan, I'll explain the change before we go on.
We build and walk through
I run the build with our own crew and meet the city's inspector on site. When it's done, we walk through the finished room with you, and it comes with our promise, satisfaction guaranteed on every job.
Costa Mesa sunroom questions answered
How much does a sunroom cost in Costa Mesa?
It comes down mostly to the type of room and what it sits on, so I give you a written price after I've seen your place rather than a number over the phone. A screen room or a patio enclosure on a sound slab costs far less than a glass room with an insulated roof, wiring and cooling, and an old slab that needs footings or a deck that needs a new frame adds to it. Tying into an older roofline can add work too, and the estimate shows where each part of the price comes from.
How do I apply for a building permit for a sunroom in Costa Mesa?
In Costa Mesa you apply online through TESSA, the city's permit system, and all the application information goes in there directly. The city's Building Safety Division ignores paper forms and sends back incomplete applications, so the plans and details have to be complete when they're submitted. On our jobs we pull the permits and handle that paperwork, including drawings from a licensed architect or engineer when the city asks for them.
Can I get an Insta-Permit for a sunroom in Costa Mesa?
Not from what the city lists. Insta-Permits are for simple jobs with a limited scope, like re-roofs, water heaters, panel upgrades, re-pipes, HVAC and EV chargers, and sunrooms and patio rooms aren't on that list. Whether your room needs a permit, and which kind, is something to confirm with Building Safety at (714) 754-5273 or buildingpermit@costamesaca.gov, and when we take the job we sort that out with them.
Does my sunroom project need a licensed contractor in California?
Almost certainly yes. The California Contractors State License Board requires a license when a project needs a building permit, uses employee labor, or has contracts totaling $1,000 or more in labor and materials, and a sunroom runs well past that figure. The only exception is a job with no permit, no employee labor, less than $1,000 combined and no advertising as a licensed contractor, and the board doesn't allow splitting a bigger project into smaller contracts to get under that line. We're licensed and insured.
What happens to a contractor caught working without a license in California?
A first offense is usually a misdemeanor, with up to six months in jail, a $500 fine or both, and the state can add an administrative fine of $200 to $15,000. Those penalties fall on the person contracting without a license, and they show how seriously the state takes it, so it's worth asking anyone who bids your sunroom whether they hold one.
What is the best way to tell if my old patio slab can hold a sunroom?
The best way is to have the slab's thickness, edges and cracks checked before you settle on a room type, because a glass room with a solid roof asks a lot more of it than a screen room does. On many older patios the edges weren't built to carry walls and a roof, and we add footings where they're needed. I look at that on the first visit, and if part of the slab can't be judged until it's opened, I'll say so in the estimate.
A written sunroom estimate for your Costa Mesa home
Send the form and we'll reply within one business day to set a time for me to come out to your Costa Mesa home. The estimate is free, done on site, and there's no obligation to go ahead with it.
- Call
- (657) 226-2045
- Location
- Placentia, CA 92870
- Hours
- Mon–Sun: 6 AM–11 PM
Start your Costa Mesa sunroom with a call
Call (657) 226-2045 or use the form, and if your home is in an HOA, tell us early so their sign-off doesn't hold up the build.




