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EnclosureWorks San Mateo Sunrooms designs and builds sunrooms, patio enclosures, and all-season rooms for homeowners across San Mateo and the Peninsula. Fully permitted, built to last in the Bay Area climate.
EnclosureWorks San Mateo Sunrooms is a licensed sunroom contractor in San Mateo, CA, offering 16 distinct services to homeowners across the Peninsula. Whether you want to enclose an existing patio, convert a deck, or build a brand-new four-season room from scratch, we handle every step - design, permits, and construction. We serve 12 cities in San Mateo County and the surrounding Bay Area.
Unused yard space eating at you? A sunroom addition gives you a bright, permanent room you use every single day.
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Chilly mornings keeping you inside? A four-season room stays comfortable year-round without ever putting on a coat.
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Want to enjoy San Mateo's mild weather without the evening chill? A three-season room is the right-sized solution.
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Patio sitting empty half the year? Enclose it and turn unused concrete into a room you reach for daily.
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Need a room that fits your home perfectly? We design custom sunrooms matched to your roofline and lifestyle.
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Starting from scratch? Our sunroom construction process takes you from bare yard to finished room, fully permitted.
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Old sunroom looking tired? We update aging structures with new glass, framing, and finishes that last decades.
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Bugs and wind ruining your outdoor time? A screen room keeps nature out while keeping the breeze in.
Learn MoreReach out by phone or fill out our contact form. We respond within 1 business day. Tell us roughly what you have in mind - room size, where on your property, and how you plan to use it. No pressure, no commitment. Just a conversation to see if it makes sense to move forward.
We schedule a free visit to your home. We measure the space, look at your existing structure and foundation, and walk through design options that fit your property. After the visit, we prepare a written estimate with a full cost breakdown. You will know exactly what you are getting before you decide anything.
Once you approve the design and sign a contract, we handle the permits, schedule city inspections, and manage the build from foundation to final walkthrough. We keep you updated throughout. When we hand over the keys to your new room, it is fully permitted, inspected, and ready to use.
We carry general liability insurance on every project and operate as a licensed contractor in California. Verify any contractor before you sign - the California Contractors State License Board at cslb.ca.gov makes it easy.
We visit your home, measure the space, and prepare a written estimate at no charge. The quote covers every cost - labor, materials, permits, and cleanup - so there are no surprises when the bill arrives.
We are a locally owned business based in San Mateo. We know the permit office, the neighborhood HOA requirements, and the conditions that Bay Area weather puts on outdoor structures. That local knowledge saves time and avoids costly redesigns.
We pull every permit and schedule every required city inspection. When your project is done, you receive copies of all approvals - so the addition is fully documented and ready for resale without any surprises.
Ready to talk? Call (650) 581-3715 or send us a message.
"The team handled everything - permits, inspections, the whole process. Our three-season sunroom was done in about five weeks once permits came through, and it came out exactly the way we discussed. We have been eating breakfast out there every morning since."
Karen M., Burlingame - Three season sunrooms
"We had a concrete patio that sat empty nine months out of the year because of the fog and wind. They converted it into an enclosed patio room that we now use almost daily. The permit process was completely handled on their end - we never had to call the city once."
David R., Foster City - Patio enclosures
"Our home was built in 1958 and the contractor warned us upfront that the foundation might need some reinforcement work. It did, and they caught it during the estimate visit - so the cost was in the contract from the start. No surprises. The four-season room turned out beautifully."
Linda T., San Mateo - Four season sunrooms
We respond within 1 business day. There is no obligation - you are just asking for a price. After you submit, someone from our office will call to schedule a free on-site visit where we measure your space and walk through the options.
(650) 581-3715EnclosureWorks San Mateo Sunrooms is based in San Mateo, CA and serves 12 communities across San Mateo County and the surrounding Peninsula - including Burlingame, Foster City, and Redwood City. We aim to schedule your free on-site estimate within the same week you reach out.
San Mateo winters are mild but wet. A three-season room is comfortable here for most of the year. A four-season room - fully heated and insulated - extends comfort through the handful of cold, rainy days from December through February. The right choice depends on how you plan to use the space daily.
The foundation is the most important - and most often shortcut - part of a sunroom. A room that shifts or settles pulls away from the house and leaks. Ask every contractor you interview specifically how they plan to build and anchor the foundation before discussing anything else.
A permit means a city inspector checks the work at key stages. That protects you from substandard construction and protects your home value at resale. In San Mateo, an unpermitted addition can require removal or costly corrections when you sell. The permit is not a hassle - it is your insurance policy.
Double-pane, low-emissivity glass keeps heat in on cool nights and blocks heat gain on warm afternoons. In San Mateo's variable Bay Area microclimate, glass quality is one of the most important decisions you make. The U.S. Department of Energy's guidance on energy-efficient windows is a useful starting point.
Because San Mateo's permit review typically takes three to six weeks before construction begins, the right time to start is earlier than feels necessary. If you want your room ready for spring, begin conversations in December or January. Starting early is the single best thing you can do to avoid delays.
San Mateo's proximity to the Bay means persistent fog and humidity - especially in the Shoreview and Bay Meadows neighborhoods. These conditions accelerate wood rot, corrode metal fasteners, and degrade window seals faster than inland climates. Ask contractors specifically which materials they use for Bay Area conditions.
For independent guidance on window energy performance, see the ENERGY STAR window ratings guide.
EnclosureWorks San Mateo Sunrooms is a licensed and insured sunroom contractor company based in San Mateo, CA, serving homeowners across 12 Peninsula communities since 2024.
Every project we build is permitted under California contracting law and inspected by the City of San Mateo Building Division. We carry general liability insurance - verifiable through the California Contractors State License Board.
Since opening, we have built and remodeled sunrooms, patio enclosures, screen rooms, and all-season rooms across San Mateo County, offering 16 distinct services to fit every home style and budget.
If you have a concrete slab, a patio-to-sunroom conversion typically costs less and takes less time than starting from scratch. The slab gives contractors a foundation to work from. A site inspection confirms whether the existing concrete is in good enough condition to use.
Look up any contractor's license number on the California Contractors State License Board website before signing anything. A licensed contractor is legally required to carry insurance and meet minimum competency standards. This check takes two minutes and can save you from a very expensive mistake.
In most of the country, three-season means spring through fall. In San Mateo's mild climate, a well-built three-season room is realistically comfortable ten or eleven months of the year - making it a strong value for most homeowners who do not need the full heating system a four-season room requires.
The National Association of Home Builders provides useful consumer guidance on room additions and what to look for when hiring a contractor. Ready to get started? Request a free estimate or call us at (650) 581-3715.
San Mateo is a mid-Peninsula city of about 105,000 people, roughly halfway between San Francisco and San Jose. The city has well-established neighborhoods including Baywood, Beresford, and Hayward Park, where a large share of homes were built in the 1940s through 1960s. Those older homes are exactly the kind of properties where a thoughtfully built sunroom fits naturally into the existing roofline and adds real daily value.
Local landmarks like Central Park and the walkable downtown along B Street reflect a community that values livable outdoor-indoor spaces. The Caltrain station at the center of the city connects residents to San Francisco and San Jose daily, and the mix of Craftsman bungalows near downtown and ranch-style homes in Beresford and Shoreview means we work on a wide variety of property types throughout the city.
San Mateo's Mediterranean climate - mild winters, dry summers, and coastal fog from the Bay - makes it one of the best places in the country for a sunroom. We know the City Building Division permit process, we understand what Bay Area moisture does to outdoor structures over time, and we build every room to handle what San Mateo weather actually delivers.
By appointment only, no walk-ins.
EnclosureWorks San Mateo Sunrooms
1941 O'Farrell St UNIT 112
San Mateo, CA 94403
hi@sanmateosunroomsnpatios.com
Monday to Saturday: 8 AM to 6 PM. Sunday: 10 AM to 2 PM.
Call (650) 581-3715 or fill out our quick form and we will respond within 1 business day with a free on-site estimate.
