Sunroom additions in Tustin CA - a room built for how you'll use it all year
A patio you barely use becomes a sunroom sized to your house, with glass and insulation chosen for how you'll use the room.

What goes into adding a sunroom in Tustin?
A sunroom addition in Tustin, CA encloses your patio or porch with windows or screens, so you end up with anything from a screened porch to a fully enclosed room that's heated and cooled. The kind of room you pick decides the windows, so it's the first thing we work out with you.
Most calls we get are about a patio that doesn't get much use because it's too hot in the afternoon or too exposed in the evening, and the fix is often a patio-to-sunroom conversion. The price moves mostly with the size of the room, what it sits on, the glass and whether it's heated and cooled. The schedule depends more on plan review than on the build, because the city has to review the plans before any building work starts, so we draw them up and handle the permit for you. I measure the space and give you the estimate in writing, so you have your own figure before you decide anything.
- Fully licensed and insured.
- Free on-site estimates.
- We respond within 1 business day.
Sunroom addition ideas for your patio
How we build a sunroom addition
Once we know how you'll use the room, I spend the most time on the glass, because a room you sit in all year needs different glass than one you open up on mild days. Which way the room faces and your budget matter too. We settle the glass and the insulation for the walls, floor and roof before the drawings are finished, since they're much easier to build in from the start and adding them later often costs more. California's energy code also sets efficiency rules for additions, so we make those choices with the state's rules in mind. From there our crew frames the walls and roof to the drawings, sets the glass and trim, and cleans up when the room is done.
Most of the additions we build end up as either a four season sunroom or a three season sunroom, and each has its own page if you already know which way you're leaning.
Why Tustin homeowners call us for sunroom additions
I measure every job myself
I come out myself to look at the space and take the measurements, and our crew does the building. I check their work at each stage, so the room that goes up matches the drawings and the drawings match your house.
Built for Tustin's stage inspections
City building inspectors check an addition at several phases to make sure it matches the approved plans and the code. I learned the trade on a municipal crew that worked the same way, and I've run this business in Tustin on those habits since 2017.
Licensed and insured on every build
We're fully licensed and insured. That matters on an addition because our crew is tying a new room into your house's roof and walls, and you want that work covered from the first day.
On a sunroom addition, the choices that matter most are made before anything gets built, so start by telling me how you plan to use the room. Call (657) 356-0049 or request your estimate.
Get a written estimate for your sunroom addition
Send the form and we'll reply within one business day to set a time. I'll come out, measure the space and give you a free on-site estimate in writing, with no pressure and no obligation.
- Fully licensed and insured.
- Free on-site estimates.
- We respond within 1 business day.
What happens after you call about a sunroom addition?
Set up a visit
Call (657) 356-0049 or send the form, and we'll set a time for me to come out. Have in mind the room type you're leaning toward and how you'll use the room through the year, since that shapes everything after.
I measure and check the base
At your house I measure the space, look at what the room will sit on and ask how you'll use it. Afterward you get the estimate in writing, so you have your own number before you commit to anything.
Plans, permit and plan check
We draw up the plans and handle the permit with whichever office covers your address, the city or, in unincorporated areas like North Tustin, the county. In Tustin a first plan check should take about 10 working days and resubmittals come back within five, unless the project needs a special approval such as one from the Planning Commission.
Build, inspect, walk through
Our crew builds to the approved plans, and the work gets inspected at stages along the way. At the end I walk through the finished room with you.
Sunroom addition questions from Tustin homeowners
How much does a sunroom addition cost in Orange County?
A sunroom in Orange County usually costs about $120 to $200 per square foot. Larger rooms that need a foundation plus heating and air conditioning fall toward the high end of that range. Your written estimate gives you the figure for your own room.
What is the best way to choose between a three season and a four season sunroom?
Choose by how you'll use the room through the year, because a four season room is heated and cooled while a three season room isn't. That choice also sets the windows, with all-weather windows in a four season room, uninsulated windows in a three season room and none at all on a screened porch.
Do I need an architect to add a sunroom in Tustin?
You might, because the City of Tustin notes that many construction projects need plans prepared by a licensed design professional such as an architect or engineer. For an answer on your own project, a Building Technician at the city answers questions at 714-573-3130 during business hours.
How do I take care of a sunroom roof?
Have the roof and gutters inspected once a year, and keep activity on the roof to what's actually needed. That's the advice in one sunroom company's construction guide, and it's an easy habit that catches a clogged gutter before it causes trouble.
How much should I pay up front for a sunroom addition in California?
California's Contractors State License Board says a down payment should be no more than 10 percent of the contract price or $1,000, whichever is less. That limit applies unless the contractor has a valid blanket performance and payment bond on file with the board, so it's worth checking against any contract you're handed.
Do I need a written contract for a sunroom addition in California?
Yes, in California any home improvement project over $500 needs a written contract that tells you about your right to cancel. Any change to the job after that has to be in writing too, so a new window size or a switch in glass should go on paper before the work changes.
Rooms that pair with a sunroom addition
Four season sunrooms
Pick this if you want a heated and cooled room you'll use in July and January alike.
Three season sunrooms
A lighter build for cool mornings and mild evenings, without heating, cooling or insulated glass.




