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Serving Union City, CA and surrounding areas. (510) 738-1709
Union City Sunrooms & Patios designs and builds sunrooms, patio enclosures, and four-season rooms that turn underused outdoor space into rooms you actually live in.
Union City Sunrooms & Patios is a sunroom contractor serving Union City, CA and the surrounding East Bay with 16 services - from full four-season room additions to patio enclosures and screen rooms. We have served 12 cities across Alameda County and work with homeowners to find the right solution for their specific space, lot, and budget. Every project we take on is fully permitted and built to California seismic standards.
Wind and fog keeping you indoors? A sunroom addition gives you a bright, protected room you can enjoy every day of the year.
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Want to use your backyard space year-round? A four-season sunroom is fully insulated and climate-controlled for all weather.
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In Union City's mild climate, a three-season room works ten or eleven months a year at a lower price than a four-season build.
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Have an existing concrete slab you never use? We can transform it into a weatherproof enclosed room without a full addition.
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Odd lot shape, specific HOA rules, or a unique floor plan? We design and build sunrooms around your home's exact conditions.
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Starting from scratch? We handle every phase of new sunroom construction - from foundation and framing to windows and finish.
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Drafty windows, a leaking roof, or an outdated layout? We rebuild and upgrade existing sunrooms to perform the way they should.
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Want the fresh air without the fog and bugs? A screen room lets the breeze in and keeps the pests and damp out.
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Already have a covered patio? We convert it into a fully enclosed room so you gain real living space without starting from zero.
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An aging deck is the ideal footprint for a new sunroom. We convert decks into enclosed, weatherproof rooms built to last.
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A true all-season room stays comfortable in every season - insulated, heated, and cooled so no weather keeps you out.
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Turn an open or covered patio into a proper enclosed room that adds usable square footage and value to your home.
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A solarium maximizes natural light with full glass walls and roof panels - ideal for plants, dining, or a bright reading room.
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Protect your patio from wind, rain, and intense summer sun with a solid patio cover installed over your existing outdoor space.
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Not sure what style of sunroom fits your home? We help you think through layout, glass type, and finish before any work begins.
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Vinyl sunrooms resist moisture, require minimal upkeep, and hold up well in the Bay Area's fog and damp coastal air.
Learn MoreCall us or fill out the form. We will ask a few simple questions about your space - what size room you have in mind, which direction it faces, and whether you want heating and cooling. No pressure, no obligation. We respond within 1 business day, and most first conversations take under 15 minutes.
We come to your home, walk the space, check your existing foundation or slab, and measure everything. We also ask about your HOA rules if they apply. After the visit, you receive a written proposal that breaks down materials, labor, and permit fees - so you know exactly what you are agreeing to before you sign anything.
We handle the permit application with Union City's Building Division and keep you updated while it is in review. Once approved, construction moves quickly. When the work is done, we walk through the finished room with you, answer any questions, and hand over your permit and inspection records - the documentation you will need when you sell.
Every project we take on is covered by our California contractor license and full liability insurance. You can verify our license number on the California Contractors State License Board website before you call us.
We come to your home, measure your space, and give you a written estimate at no charge. You get a real number for your specific project - not a range from a website calculator - before you commit to anything.
We are a local business that has worked in East Bay neighborhoods since 2016. We know Union City's permit office, the Bay Area's seismic requirements, and what the fog and marine layer do to materials over time.
We handle the permit application, coordinate city inspections, and give you the signed records when the job is done. Your sunroom shows up as legal, documented square footage on your home - not a liability at closing.
Ready to talk through your project? Call us at (510) 738-1709 or request a free estimate online.
"They finished our four-season sunroom right on the timeline they quoted - seven weeks from permit approval to final inspection. The room is fully insulated and we have been using it every morning even when the fog is thick. The windows do not sweat, which was my main concern going in."
Maria T., Fremont, CA - Four season sunrooms
"We had a concrete slab in the backyard that had been sitting empty for years. They converted it into an enclosed patio room in under two weeks. The crew knew our HOA had approval requirements and handled that paperwork before pulling the city permit. No surprises, no delays."
James R., Hayward, CA - Patio enclosures
"I wanted a screen room so my kids could play outside without the bugs that come in from the wetlands nearby. They built it in four days and it is exactly what I pictured. Good communication throughout - they sent a photo the morning the screen panels went in so I could see progress while I was at work."
Priya N., Union City, CA - Screen room installation
We respond to every inquiry within 1 business day. There is no obligation to move forward after submitting the form. Once we receive your message, someone from our office will call you to schedule a free on-site estimate at a time that works for you.
(510) 738-1709Union City Sunrooms & Patios is based in Union City and serves 12 cities across Alameda and Santa Clara counties, including Fremont, Hayward, Newark, and San Jose. We aim to schedule free on-site estimates within the same week of your request across our full service area.
Yes - Union City's coastal climate cycles between cool damp mornings and warm afternoons daily. The right glazing and moisture-resistant sealing make the difference between a room you use and one you avoid. The U.S. Department of Energy's window guide explains how low-emissivity coatings manage heat and condensation.
California requires that additions be anchored and framed to move with the ground during an earthquake rather than crack apart. Every connection point - foundation, ledger board, roof-to-wall tie - must meet seismic standards. This is built into every permitted project in the East Bay automatically.
Always, if your neighborhood has an HOA. These are two separate processes running on different timelines. HOA approval often needs to happen first, because the HOA may require design changes that would affect what you submit to the city. Starting HOA approval before finalizing your design saves weeks.
Union City rarely sees freezing temperatures, which means a three-season room works for most of the year at a significantly lower cost than a fully insulated four-season build. If you plan to heat and cool the space and use it on the coldest winter nights, a four-season room is the right choice.
Often yes - many Union City homes from the 1960s through 1980s have a concrete patio slab that can serve as the foundation base after inspection. If the slab is in good condition, this reduces cost and construction time meaningfully. Your contractor should assess the slab condition during the initial site visit at no charge.
The metal strips that seal the joint where a sunroom meets your existing house are the most common source of water intrusion. Poor flashing is invisible until it fails - usually during the first heavy rain. Ask every contractor you interview to explain exactly how they handle the connection point between the new room and your home's exterior wall.
Union City Sunrooms & Patios is a licensed and insured sunroom contractor based in Union City, CA, serving 12 cities across the East Bay since 2016.
Our license is issued by the California Contractors State License Board, the state authority that regulates all residential and commercial contracting work in California. You can verify our license on their website before you contact us.
Since 2016, we have completed sunroom additions, patio enclosures, four-season rooms, and conversions across Alameda County and the surrounding region - 16 service types total. Every project we take on is fully permitted and inspected. Learn more about our team and approach.
Flashing seals the joint where the sunroom meets your home's exterior wall. Done correctly, it keeps Bay Area winter rain from working its way into your wall cavity. The National Roofing Contractors Association covers roofing and flashing standards in detail.
Before you finalize your design. Many Union City HOAs have rules about roofline height, exterior colors, and materials. If you design your sunroom and then find out the HOA requires changes, you may have to start over. Getting HOA guidance first keeps your project timeline clean.
Make sure each written estimate includes the same items: foundation work, framing, windows, permit fees, and interior finishing. A low quote that excludes permits or foundation prep is not actually lower. Ask each contractor to walk you through every line item so you can compare apples to apples.
The best way to know what your specific project will cost and how long it will take is a free on-site estimate. Call (510) 738-1709 or request an estimate online and we will schedule a visit within the week.
Union City is a city of about 75,000 residents in southern Alameda County, incorporated in 1959 and built out largely through the 1960s, 70s, and 80s. The majority of homes here are single-family houses from that era - stucco ranch-style and tract homes on modest lots with concrete slabs in the backyard that are ideal candidates for sunroom additions and patio enclosures.
The city is home to Union Landing Shopping Center along Whipple Road, one of the main commercial anchors where residents shop and dine. Homes are spread across neighborhoods ranging from the older areas near Mission Boulevard to newer townhome developments near the Union City BART station. Many residents commute out of the city by rail or via Interstate 880, which means they often need a contractor who can work reliably on a set schedule without needing someone home to supervise.
Homes this age in Union City's coastal Bay Area climate face specific challenges - marine layer moisture, seismic design requirements near the Hayward Fault, and aging stucco and concrete that can affect how a sunroom attaches to the existing structure. We have worked in these neighborhoods since 2016 and we know what to look for before we ever submit a permit application. Whether your home is on one of the older streets off Mission Boulevard or in a newer community near the BART station, we serve all of Union City.
By appointment only, no walk-ins.
Union City Sunrooms & Patios
2551 Robin CtUnion City, CA 94587(510) 738-1709projects@unioncitysunrooms.comAlways open, 24/7.Call us or fill out the form and we will schedule a free on-site estimate at a time that works for you - no obligation, no pressure.