Sunroom additions
We tie the new room into your roofline and back wall, so we look at the eaves and the slab together before deciding where it starts and how the roof pitches.
Apex Mission Viejo Sunrooms and Patios builds sunrooms, patio enclosures, screen rooms and patio covers for Costa Mesa homeowners, turning a patio or deck you hardly use into a room you'll sit in every week.

Most calls we get from Costa Mesa start the same way. There's a back patio or a small deck nobody sits on, and the homeowner wants a room they'll actually use. A lot of the houses here are older, and so are their slabs, so the first thing I look at is what the room will sit on, because a slab poured for a barbecue wasn't always poured to carry walls and a roof.
Price comes down to the room type first, whether that's a screen room, a three season room or an insulated four season room, then the size, the glass and roof, and whether the slab or deck needs work before we build. The schedule turns on the city's permit review and on how much base work comes first. Your own figure comes in the written estimate we send after I've seen the yard.
We're a sunroom contractor based in Mission Viejo, and Costa Mesa is one of the Orange County cities we work across, along with Santa Ana just north and Irvine to the east. Our own crew does every build, here the same as at home.
If your slab or deck needs work, I'd rather tell you on the first visit than find out after the walls go up, because a sunroom is only as good as what's under it.
We'll point you to the room you'll use every week, not the biggest one we could sell you, since extra square footage adds cost without adding much use.
I started building screen rooms and patio covers for neighbors on weekends and made it a full business in 2013, so what we know comes from real jobs, one patio at a time.
We tie the new room into your roofline and back wall, so we look at the eaves and the slab together before deciding where it starts and how the roof pitches.
An insulated room with walls and glass built for year-round use, heated and cooled with the house, for owners who want a true extra room off the kitchen or family room.
Glass or vinyl windows on an uninsulated frame make a lighter build than a four season room, a good fit when you mostly want the patio out of the wind and dust.
We close in an existing covered patio with windows, screens or knee walls, keeping the cover when its posts and beam are sound and replacing whatever isn't.
For yards that don't fit a standard kit, like an odd corner, a back door set high off the patio or a narrow side yard, we lay out the frame around the house you have.
Our own crew does the build from base to roof, so the people fixing the slab or setting footings are the same ones who put up the walls and glass.
Older sunrooms we see here often have fogged glass, leaky roof panels or tired screens, and we replace those pieces while keeping the frame wherever it's still solid.
A screened room keeps bugs out and lets the air through, and it's the lightest build we do, often the right call for a patio you mostly use in the evening.
We check whether your patio slab can carry walls and a roof before anything else, and if it can't, we tell you on the first visit what fixing it involves.
A deck built for chairs and a grill usually needs more support before it can hold a room, so I look at the framing and footings underneath on the first visit.
A room you'll use in January and August alike, built with insulated walls and roof and windows picked for the side of the house it faces.
Built on the patio footprint you already have, with a solid roof and window walls, it gives you a covered room without moving the back door or digging up the yard.
Glass on the walls and the roof lets in the most light, and it works best on a side of the house that doesn't take the full afternoon sun, which we check with you on site.
A solid or lattice cover over the slab gives you shade now, and when it's framed right it can be closed in later without starting over.
On the first visit I'll tell you what kind of room makes sense for your yard, then we work out the size, the roof style and where the windows go.
Vinyl frames never need painting and clean up with a hose, so upkeep stays low, though you get fewer color choices than you would with aluminum.
Send the form and we'll reply within one business day to set a time. I come out, measure and look over the slab or deck, then we send a written estimate, free and with no obligation.
I look at every job in person, so the one measuring your yard is the same person telling you what kind of room fits it and what the base needs.
We go over screen, three season and four season rooms right there in your yard, so you pick based on how you'll use the space, not on a brochure.
After the visit we send it in writing, so you can look it over, ask questions and decide on your own time, with no pressure to sign anything.
These are the questions Costa Mesa homeowners ask most about licensing and permits before they hire someone to build a sunroom.
Yes, for almost any sunroom. The state's contractor licensing board requires a license when the work needs a building permit, uses employee labor or totals $1,000 or more in labor and materials, and a bigger job can't be split into smaller contracts to stay under that. A sunroom passes that figure easily. We're licensed and insured, and our own crew does the build.
Building permits come from the city's Building Safety Division, and plans and applications go in through TESSA, the city's online permit system. Everything gets entered there, the city ignores paper forms, and an incomplete application gets sent back. We file the permit for you, book the inspections, and let you know early if the city or your HOA needs anything from you.
Not from the list the city posts. Insta-Permits are for simple jobs with a limited scope, and the listed ones cover HVAC, re-piping, water heaters, EV chargers, panel upgrades and re-roofs. A sunroom isn't on that list, so when your room needs a permit, it goes through the regular building permit process with Building Safety.
These are the Orange County cities with their own page on our site, and they aren't the only places we work. If yours isn't listed, call or send the form and ask.
We're open until 9 PM on weekdays and 10 PM on weekends, so call (949) 619-8191 after work or send the form anytime.