Sunroom contractor in Downey, CA - more usable room off your back patio
Long Beach Sunrooms & Patios builds sunrooms, patio enclosures and patio covers for homeowners in Downey, CA, turning a slab patio, a deck or a plain back wall into a room you'll actually use most of the year.

- Fully licensed and insured.
- Free in-person estimates.
- We reply within 1 business day.
About Downey, CA
Downey is mostly single-family houses on regular lots, with a fair share of apartments and condos mixed in, so most of our calls here come from owners with a backyard and a patio they don't use as much as they'd like. A lot of these houses have had a patio cover added or patched over the years, and that tells us a good bit before we even pull out a tape. The work feels a lot like what we do next door in Bellflower and Paramount.
What shapes the job here is what's already behind the house. A slab poured for a barbecue wasn't made to hold walls and a roof, and the back wall has to take the new roof cleanly, so those two things decide most of the plan.
Services in Downey, CA
Patio-to-sunroom conversion
Plenty of Downey houses already have a slab patio out back, and that's usually the easiest place to start a new room. If the slab can't carry the walls and roof, we add a footing along the edge before anything goes up.
Three season sunrooms
For most families here who want a shaded place to sit from spring into fall, a three season sunroom is the one I'd point to first. It keeps out wind, dust and bugs without the cost of heating and cooling a full room.
Four season sunrooms
If you want the room to work as part of the house in July and January alike, a four season room with insulated walls, roof and glass is the way to go. We plan it around the energy rules for your side of the city, so the glass and roof are picked to meet them from the start.
Patio cover installation
A lot of the older patio covers we see here are sagging, rotted at the posts or tied into the eave in ways we wouldn't repeat. We take the old one down and put up a new cover attached properly, framed so it can be enclosed later if you want.
Sunroom remodeling
Some houses here already have an enclosed room out back that leaks at the roof joint, runs hot or just feels dated. We figure out what's worth keeping, then replace the glass, roof panels or framing that's causing the trouble.
Screen room installation
When you mostly want evenings outside without the mosquitoes, a screen room over your existing patio gets you there with less work. It's lighter to build, and we can frame it so glass panels go in later if you change your mind.
Working in Downey: permits, licenses and what moves the price
Here the city's Building and Safety Division issues permits for additions and remodels and does the plan check and inspections, so a sunroom's schedule turns on that review before we start and on inspections while we build. In the city's own words, generally any new construction, addition or alteration to an existing building needs a permit, and permits are issued at the Building counter in Downey City Hall or filed through the city's online portal. Before you sign with anyone, it's fair to ask whether they hold a current City of Downey business license, since a contractor needs one to pull a permit here.
We're fully licensed and insured, and when your job needs a permit, we pull it and handle the paperwork with the city so you aren't the one chasing it. The price moves mostly with the room's size, three season versus four season, the glass and roof you pick, and what the slab or deck needs underneath, and the schedule also depends on when the glass and panels arrive, which is why your written estimate comes after I've seen the house. It's the same way we work in Carson and Lakewood, just with each city's own office and rules.
Downey, CA properties and local conditions
The city puts most of Downey in energy code climate zone 8 and the part north of Vista Del Rio in zone 9, and those zones set some of the building rules for things like roofing. That matters most on a four season room you'll heat or cool, so I check which side of that line your house sits on before we pick the roof and glass.
What we see most behind houses here is a slab patio poured years ago, often with a cover on top that's been patched more than once. A slab like that can look fine and still be thin at the edges or cracked where it settled, and a room puts its weight right on those edges. So we check the slab before we draw anything, and if the old cover is tired, we plan to replace it rather than build the new room around it.
Get a written sunroom estimate for your Downey home
Send the form or call (562) 200-7450, and we'll reply within one business day to set a time for me to come out to your Downey house. The visit and the estimate are free, with no pressure and no obligation to go ahead.
How it goes when you call us about a Downey sunroom
Call or send a request
Tell us what you have out back now and what you'd like the room to do. We set a visit time that works around your schedule.
I measure and check the base
I come out myself, measure, look at the slab or deck and the wall the room will join, and we settle the big choices right there at your table. The visit costs you nothing, and it helps if you're home so we can talk it through.
Get your written estimate and permit
You get a written estimate for the room we talked about, and when the job needs a permit, we file it with the city's Building and Safety Division. Their plan check comes before any building starts, so that review sets the start date as much as we do.
Our crew builds the room
Our crew lead and installers do the build, and I check in as it goes and when the city's inspector comes out. At the end we walk the finished room with you so you can see it's the room you bought.
Frequently asked questions
Do I need a permit to add a sunroom to my house in Downey?
Usually yes, because the city says that generally any new construction, addition or alteration to an existing building needs a permit, and a sunroom joined to your house is the kind of work that rule is written for. The city's building permit page has the details, and Downey builds to the current California Building Code along with its own local changes. For a screen room or a cover, the Building and Safety Division can tell you where it falls, and I'll raise it at the visit.
Can I pull the building permit for a sunroom on my own house in Downey?
Yes, if you live in the single-family house the permit covers, because Downey issues permits to California licensed contractors and to owner-builders living in the home. Townhomes, condos, apartments and duplexes are different, and the city issues those permits only to California licensed contractors. If you hire us, we pull it so you don't have to.
Does a contractor from outside Downey need a Downey business license?
Yes, the city requires a business license for any business working in Downey, including contractors with offices outside the city. A contractor needs a current one to pull a permit, and it can be paid for when the permit is issued.
How much does a sunroom cost in Downey?
Your price comes down to the room's size, the type of room, the glass and roof, and what your slab or deck needs to carry it. A screen room over a sound slab sits at the low end, and an insulated four season room on a new footing sits at the high end. I give you a written estimate after the free visit, so you're working from your own number.
How long does a building permit stay valid in Downey?
A Downey permit becomes invalid if work doesn't start within 12 months of issuance, or if work that started is abandoned for 180 days. We line up the crew and materials before we file, so your permit doesn't sit.
What causes a sunroom or patio enclosure to leak on a Downey house?
Most leaks on an add-on room start where its roof meets the house, because the flashing at the stucco or under the eave was rushed or skipped. We take our time at that joint so water runs off the new roof instead of behind the wall, and on a remodel it's the first place I look.
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Explore the services
Sunroom additions
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Four season sunrooms
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Three season sunrooms
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Patio enclosures
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Custom sunrooms
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Sunroom construction
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Sunroom remodeling
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Screen room installation
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Patio-to-sunroom conversion
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Deck-to-sunroom conversion
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All season rooms
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Enclosed patio rooms
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Solarium installation
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Patio cover installation
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Sunroom design
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Vinyl sunrooms
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Long Beach, CA
Tell us about your Downey back patio
A few lines about what's out back now and how you'd like to use the room let me bring the right questions to the first visit, so we can settle the plan in one sitting.




