Sunroom Contractor in Riverside, CA - Rooms Built to Tie Into Your House
Horizon Highland Sunrooms & Patios builds sunrooms, patio enclosures and screen rooms for homes in Riverside, CA, from patio and deck conversions to full additions that tie cleanly into the house.

Riverside houses as we find them on the job
Riverside is a big city with a lot of different housing in it, and the back of the house usually tells me most of what I need to know. In the older neighborhoods near downtown, under Mount Rubidoux and out toward Fairmount Park along the Santa Ana River, we tend to find houses that have been added onto over the years, so the rooflines and wall framing don't always line up the way a new room needs. Out toward the citrus groves around Arlington Heights, or the neighborhoods near the UCR campus and the Box Springs foothills, it's more often a single-story house with a slab patio or an older cover out back.
It's a lot like what we see in Colton and Loma Linda, just more of it. Either way, the job starts with what the room will sit on and where it meets the house, because that decides whether we build on what you have or start with a new base.
Services in Riverside, CA
Patio-to-sunroom conversion
A lot of Riverside houses already have a concrete patio out back, and turning it into a real room is a call we get often. Before we frame anything, I check whether that slab is thick and sound enough to carry walls and a roof, because a patio poured for chairs isn't always ready for that.
Sunroom construction
On older houses that have been added onto, a new room has to meet walls and rooflines that aren't always square or level. Our sunroom construction starts with how the room joins the house, so the roof tie-in and flashing are worked out before the walls go up.
Deck-to-sunroom conversion
Where a lot slopes away from the house, the outdoor space is often a raised wood deck instead of a slab. We look at the footings and framing first, because a deck built for foot traffic usually needs reinforcing or rebuilding before it can hold a room.
Sunroom remodeling
Some homes here already have an older aluminum patio room that leaks at the seams or never felt like part of the house. We can often keep what's sound underneath and replace the walls, glass or roof, and I'll tell you straight which way it goes once I've seen how it was built.
Patio cover installation
If you want shade and a finished look without walls, a patio cover is the simpler job. We attach it so it lines up with your roof and sheds water away from the house, which also leaves room to enclose it later.
Four season sunrooms
When you want to use the room like the rest of the house, with lights, outlets and heating and cooling, you're looking at a four season room. Our own crew builds the room, and we bring in licensed trade partners for the wiring and the heating and cooling.
Working in Riverside: permits, licenses and what sets the schedule
The City of Riverside issues the building permit for a new room here, and most applications clear the city's planning review before they move on to building plan check. That review, more than the build itself, is usually what sets the schedule. It's also worth asking any contractor you're comparing whether they hold a city business license, since the city requires one of businesses working inside its limits. We're licensed and fully insured, and before we draw anything I check with the city about your address, then we prepare and file the plans and permit paperwork for you.
The price moves with the size of the room, how closed in it is and what the base and the roof tie-in need before we can build. My estimate spells out what's in the room and what isn't, so you can see where the money goes. It's the same way we work up jobs in Fontana and the other cities around Highland, where we're based.
Is a sunroom a good fit for your Riverside house?
On a lot of the older houses here, the back wall has already been changed once or twice, with a converted garage, a patio cover screwed into the fascia or an addition with its own roofline. That's the kind of job I like, but it means opening things up to see what's really holding the roof before we settle on a layout, because a new room tied into a weak spot shows it later in leaks and cracks.
If your slab patio already gets used as much as the living room, enclosing it usually makes sense. If the slab is cracked or sits too low against the house, I'd rather pour a proper base than build on it and hope.
Get a free on-site sunroom estimate in Riverside
We reply to every call and form within one business day to set a time, and I come out to your Riverside house myself to measure and look over the base and the house. The estimate is free and written up, it spells out what the room would include, and there's no obligation to go ahead.
How it works when you call us about a Riverside sunroom
Call or send a message
Call (909) 737-1119 or use the form, and tell me a little about the house and what you want the room for. We'll set a time for me to come out.
I come out and measure
I measure, check the slab or deck, and look at how the roof and back wall would take a new room. It helps if you've thought about where you'd want doors and how you'll use the space.
You get a written estimate
The estimate lays out what the room includes and what it doesn't, from the base to the glass. If something can't be known until we open a wall, I'll say so in writing.
We handle plans and permits
Once you say go, we prepare the plans and file the permit paperwork with the city. The build date follows the city's approval, so we line up the crew around it.
Our crew builds the room
Our own crew does the framing, glass and roof, and we keep your yard picked up as we go. At the end, we walk the room with you and go over anything you want to see.
Riverside sunroom questions we hear
Do I need a building permit to add a sunroom in Riverside, CA?
Plan on it, because Riverside requires a building permit for most construction, including building or altering a structure and the electrical work that goes with it. The city's exempt list is finish work like painting, tiling, carpeting, cabinets and counter tops, not new rooms.
How do I apply for a sunroom permit in Riverside?
The property owner, the owner's authorized agent or a properly licensed contractor can apply, and applications can be made at the city's Permit Services counter in the One Stop Shop. When you hire us, we file it for you, so you don't have to work through the paperwork yourself.
Can a patio cover permit be issued the same day in Riverside?
Sometimes, yes, since the city lists simple patio covers among the permits it can issue same day over the counter. A sunroom with walls, windows and wiring is a bigger project, and the city says other projects may need plans submitted for review, so we plan for that on a full room.
Does a contractor based outside Riverside need a city business license?
It may, because an older page from the city's finance department says businesses located outside the city limits may also be required to get a City Business License. The city's Business License Division answers questions about it and is the place to check current details. We're based in Highland, so it's a fair question to ask us too.
How long does a Riverside building permit stay valid?
A permit for a residential structure becomes invalid unless the permitted work starts on site within 12 months after it's issued. That's why we time the filing to when your build can actually start, instead of letting a permit sit.
What drives the cost of a sunroom in Riverside?
The size of the room and how closed in it is drive the cost most, since a screened three season room usually costs less than a glassed four season room with wiring and heating and cooling. After that it comes down to whether your slab or deck can carry the room as it is, how much work the roof tie-in takes on an older house, and the plans and permit. I'll put your own figure in writing after I've seen the house.
Ask about your Riverside sunroom and permits
Call (909) 737-1119 or send the form with a few lines about the back of your house and how you'd use the room, so I show up already thinking about your job.




