Morning coffee out of the wind
Plenty of people just want a bright spot to start the day. For that, a simple enclosed patio with good windows is often enough, and it keeps the budget down.
Patio-to-sunroom conversion in Mission Viejo CA - a room you'll actually use
Got a patio slab that sits empty most of the year? We check the slab first, then build a room that fits how you live.
- Licensed and insured.
- Free quotes on site.
- We respond within 1 business day.
Turning your patio into a sunroom
A patio-to-sunroom conversion in Mission Viejo builds a sunroom on top of the patio slab you already have. At Apex Mission Viejo Sunrooms and Patios, we do it so you end up with a room you'll sit in every week, not a slab you walk past.
The room you pick and how much of your patio we can reuse move the price the most. A small room on a sound slab under an existing roof usually costs less, and a bigger room that needs a new foundation plus heating and air conditioning runs toward the top. The schedule mostly turns on the city's permit and inspections and on whether the slab edge needs work first, and your written estimate gives you the numbers for your own patio.
Settle the insulation question before we start. Insulated windows and insulation in the walls, floor and roof make the room more efficient, and they're much easier to put in while we're building, so adding them later can often cost more. We're licensed and insured, we file the permit and book the inspections with the city, and we'll tell you early if the city needs anything from you.
I look at every job myself
I come out to every estimate and our own crew does the build, so the business that sized up your slab is the same one answering for what goes on top of it.
Learned on real jobs since 2013
I started out building screen rooms and patio covers for neighbors on weekends and made it a full business in 2013, so what I know comes from real patios, not a catalog.
Sized for how you'll use it
We size the room around how you'll actually use it, so you're not paying to heat and cool square footage you only walk through twice a month.
How we build on your existing patio
I start with the slab, because a sunroom is only as good as what it sits on. Before we talk windows or roof style, I look at how the slab meets the house, where it's cracked or settled, and whether it can carry a room as it is. If it needs work, I'd rather tell you that on the first visit than find out after the walls go up.
Then we deal with the edge. When a slab runs about 4 inches or more past the house wall, a new wall built in line with the house leaves a ledge under it. Without proper flashing, the bent metal that steers water away, rain can sneak behind the siding, and people can trip on it too. We decide how to handle that edge before the walls go up, and the usual fixes are a concrete block curb on the slab, a pressure-treated wood curb bolted to it, or cutting the slab back so it lines up with the foundation.
Expansive soil is common in Mission Viejo. It's the kind that swells when it's wet and shrinks as it dries, so slabs here can shift over the years, and that's one more reason I check the edge closely. We're based in Mission Viejo and work across the Orange County cities around it, on wood decks too through our deck-to-sunroom conversion work. If you want a room you can heat, cool and use any month, our all season rooms are built for that.
How people use a converted patio
A home office with daylight
If you'll work out there on summer afternoons, plan on heating and cooling from day one, because a sunny room with no climate control gets uncomfortable fast.
Evenings without the bugs
When you mostly sit out from spring through fall, screens or lightweight windows let the breeze in and keep mosquitoes out without paying for a fully conditioned room.
Room for family dinners
A conversion can give you a dining spot that holds a real table, so figure out where the table and chairs will go before we settle on the room's size.
Get a written estimate for your patio room
Send the form and we'll reply within one business day to set a time for your free visit. I measure, look over the slab, talk room types with you, and then we send a written estimate, no obligation.
Have your patio size handy
If you know roughly how long and deep the patio is, put it in the form, because it lets us talk through room size before I even pull out the tape.
Know if you want heating and cooling
Tell us whether you picture a room you'll heat and cool or a simpler screened space, since that one choice shapes the whole estimate.
Satisfaction guaranteed on every job
That's our promise on every room we build, from a simple screened patio to a fully heated and cooled one, and it doesn't change with the size of the job.
Sunroom and patio room examples
Example sunrooms, enclosed patios and screened rooms to help you pick window styles, roof lines and layouts worth talking through at your estimate.
Questions about converting your patio
Straight answers to what Mission Viejo homeowners ask before turning a patio into a sunroom, from cost and room types to permits and upkeep.
How much does a patio-to-sunroom conversion cost in Orange County?
A sunroom in Orange County usually costs about $120 to $200 per square foot, and that's the going rate around here, not our price. Room type, size and how much of your slab and roof we can reuse decide where you land. After I see your patio, we send a written estimate with your own number.
What's the difference between a four-season room and an enclosed patio?
A four-season room is fully enclosed, heated and cooled, and has all-weather windows, while an enclosed patio has no heating or cooling and uses uninsulated windows or screens. The enclosed patio may cost less. If you'll be out there most weeks of the year, I'd go four-season, and if it's mostly warm evenings, the simpler room usually makes more sense.
How do permits and inspections work for a sunroom in Mission Viejo?
Mission Viejo Building Services takes all permit filings and inspection requests online, through a portal you register for. We do the filing and book the inspections for you, and a request in before 4:00 PM gets an inspection the next business day. The city has also updated its fire hazard zones, so it's worth looking up your address on the city's fire zone map.
Can my existing patio slab stay when I add a sunroom?
Usually, yes, as long as it's sound and the edge gets a planned fix, and keeping it is one of the ways to hold the price down. Where the slab is bigger than the room, one maker seals the floor channel straight to the slab instead of flashing, so porous concrete can show a damp spot inside in wet weather that goes away and isn't structural.
How do I take care of a sunroom once it's built?
One maker's guide suggests a yearly check of the roof and gutters, and keeping the weep holes, the small drain slots along the bottom of the frame, clear so water can get out. The same guide says to keep window and door tracks clean and use a pure silicone spray, since oil-based lubricants tend to pick up dirt.
Related rooms we build
Call or write about your patio
Call (949) 619-8191 weekdays until 9 PM or weekends until 10 PM, or email quotes@missionviejosunroomsandpatios.com and tell us whether you want heating.