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Serving Fullerton, CA and surrounding areas. (657) 632-9118
SunPort Fullerton Sunrooms & Patios builds custom sunrooms, patio enclosures, and four-season rooms for homeowners across Fullerton and surrounding communities. Get a space you will actually use.
SunPort Fullerton Sunrooms & Patios is a sunroom contractor based in Fullerton, CA, offering 16 services that turn underused patios and backyards into rooms homeowners actually live in. We work across 12 cities in the area and handle everything from initial design to final inspection sign-off - permits included.
Unused patio sitting empty all summer? A proper sunroom addition turns that wasted space into a room your family will use every day.
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Want to enjoy natural light in January and July without cranking the AC? A four-season room gives you that comfort all year.
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Looking for outdoor living without bugs, wind, or direct sun glare? A three-season room delivers that for most of the year in Fullerton's mild climate.
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Existing patio aging or barely usable? We enclose it with glass or screen walls to create a protected room you can actually sit in.
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Want a sunroom built around your home's style and how you actually live? Custom design means every detail is made for you.
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Starting from scratch with a new sunroom build? We handle permits, foundation work, framing, glass, and finishing - start to finish.
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Old sunroom that leaks, feels dated, or is too hot to use? We remodel existing rooms so they perform the way they were supposed to.
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Want to keep insects and wind out without blocking the breeze? A screened room is the most affordable way to extend your living space outdoors.
Learn MoreThree straightforward steps from your first call to your finished room.
Tell us what you are hoping to build - a rough size, how you plan to use it, and your general timeline. We will ask a few questions about your HOA status, your existing patio or slab, and your budget range. You will hear back from us within 1 business day.
We visit your home, measure the space, check the existing foundation, and assess sun orientation. You get a written proposal with a detailed cost breakdown and a realistic project timeline - including the permit review period so there are no surprises.
We handle permits, HOA submissions, inspections, and all construction. When the job is done, we walk you through every detail of the finished room and hand over your inspection sign-off paperwork. You keep that - it protects your home's value when you sell.
Four things that matter when you are spending this kind of money on your home.
We carry an active California contractor's license from the CSLB and full general liability and workers' compensation coverage. You can verify our license online in two minutes - and we encourage you to.
We come to your home, assess the space, and give you a detailed written proposal at no charge. Every line item is spelled out so you know exactly what you are paying for before you sign anything.
We are a locally owned business operating right here in Fullerton. We know the city's permit process, the HOA landscape in local neighborhoods, and the soil and climate conditions that affect how sunrooms need to be built here.
Call or send a message and someone from our office will follow up within 1 business day to schedule your free estimate. We do not use an answering service - you will hear from us directly.
Ready to get started? Call (657) 632-9118 or send us a message.
"We had a patio slab that had been sitting there empty for years. The team assessed it, told us it needed minor reinforcement, and built the sunroom on top of it. The whole project came in on the timeline they gave us at the start - no surprises."
Robert M., Placentia - Sunroom additions
"Our west-facing patio was basically unusable from noon onward in the summer. The team walked us through the glass options and explained exactly why one coating handles heat better than another. The finished room is comfortable even on the hottest afternoons."
Sandra K., Brea - Four season sunrooms
"I was nervous about dealing with our HOA, but they handled the architectural review submission from start to finish. By the time construction started, every approval was already in place. The finished patio enclosure looks like it was always part of the house."
David T., Yorba Linda - Patio enclosures
We respond within 1 business day - no automated replies. This is a no-obligation conversation, not a sales call. After you submit, someone from our office will call to schedule a free on-site estimate at a time that works for you.
(657) 632-9118SunPort Fullerton Sunrooms & Patios is based in Fullerton, CA and serves 12 cities across northern Orange County and the surrounding region, including Anaheim, Placentia, and Brea. We offer same-week scheduling for free estimates and typically serve most areas within a 20-mile radius of our office.
Six questions homeowners commonly have before starting a sunroom project.
Not if it is designed for it. The right double-pane, heat-blocking glass keeps the room comfortable even at 95 degrees. The wrong glass turns it into a greenhouse by noon. Always ask your contractor how they handle solar heat gain on south- and west-facing rooms.
Yes - every time. Any permanent structure attached to your home in California requires a building permit. Skipping it can stall a home sale, trigger fines, or result in a required teardown. The permit is also what makes the added square footage count for appraisers.
In Fullerton's climate, a three-season room is usable roughly 10 to 11 months of the year - nearly as long as a fully conditioned four-season room, at a meaningfully lower cost. The decision comes down to your tolerance for cold January nights and whether you want the room for entertaining or year-round daily use.
It might - but it needs to be assessed first. Many older Fullerton homes have slabs that are cracked, uneven, or not thick enough for a permanent structure. A contractor should evaluate the slab during the site visit and include any needed work in the written estimate. The Portland Cement Association publishes resources on concrete evaluation standards at cement.org.
A mini-split system - a wall-mounted heating and cooling unit - is the most common and cost-effective choice for sunrooms here. It is far easier and cheaper to install during construction than after the room is finished. The U.S. Department of Energy covers ductless mini-splits at energy.gov/energysaver.
Many Fullerton neighborhoods - especially planned communities like Amerige Heights - require written HOA approval before you can apply for a city permit. Getting that approval first prevents having to redesign a project that the city has already reviewed. Ask any contractor whether they have worked with your specific HOA before.
SunPort Fullerton Sunrooms & Patios is a licensed and insured sunroom contractor company based in Fullerton, CA, serving 12 communities across northern Orange County since 2025. Our California contractor's license is issued by the Contractors State License Board - you can verify it on the CSLB website at any time. We carry general liability and workers' compensation coverage on every project.
We offer 16 sunroom and patio enclosure services, from prefabricated three-season rooms to fully custom four-season additions with new foundations and climate control systems. Every project we take on is permitted, inspected, and fully documented.
Want to learn more about who we are and how we work? Visit our About page.
An unpermitted sunroom can stall or kill a home sale - buyers' lenders sometimes refuse to finance homes with unpermitted square footage. You may also be required to remove the structure at your own cost. The National Association of Realtors covers this risk in their Remodeling Impact Report at nar.realtor.
In Fullerton's climate, a three-season room is comfortable for roughly 10 to 11 months of the year - nearly the same usability as a four-season room, at a lower cost. It makes sense when you want a bright, protected space for entertaining or casual use without the expense of full insulation and HVAC.
Ask your contractor to assess your existing slab before signing a contract. A slab that is cracked, uneven, or too thin needs to be addressed before any framing begins. In Fullerton's clay-heavy soil, settling is a real concern - a proper foundation assessment is not optional, it is the starting point.
Have a specific question about your project? Call (657) 632-9118 and we will answer it directly - no sales pitch, just a straight answer.
Fullerton is a fully built-out city in northern Orange County with roughly 140,000 residents across about 22 square miles. The city is home to a mix of long-established neighborhoods - including Craftsman bungalows and Spanish Colonial Revival homes near Downtown Fullerton and postwar ranch houses in the broader residential areas - alongside newer planned communities near the Brea border. Median home values push $750,000 and above, according to U.S. Census data, which means most homeowners have real equity worth protecting.
A large share of Fullerton's housing stock was built between the 1920s and 1970s, which means many homes have older concrete patio slabs, aging exterior structures, and foundation conditions that affect how a sunroom addition needs to be designed and built. The city's Development Services Division requires permits for all room additions, and the City of Fullerton Building Division reviews plans before issuing any permit. Newer communities, including those near the Fullerton Heritage historic districts, often have active HOAs with architectural review requirements that must be satisfied before a permit can even be applied for.
Fullerton gets over 280 sunny days per year and regular Santa Ana wind events in the fall and winter, according to the National Weather Service. That combination makes the design of any outdoor living addition important - a sunroom that is not built for the local climate will be uncomfortable half the year. SunPort Fullerton Sunrooms & Patios builds and designs every project with Fullerton's specific sun intensity, soil conditions, and seasonal patterns in mind.
By appointment only, no walk-ins.
SunPort Fullerton Sunrooms & Patios
2005 Raymer Ave Ste NMonday to Saturday: 8 AM to 6 PM. Sunday: 10 AM to 2 PM.
Call (657) 632-9118 or send us a message - we will schedule a free on-site estimate within 1 business day.
