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Serving Westminster, CA and surrounding areas. (657) 364-0879
Westminster Sunrooms & Patios has been building sunrooms across Orange County since 2019. Costa Mesa is a city we know well - from the craftsman bungalows on the Eastside to the 1960s ranch homes in Mesa Verde - and we build solariums, custom sunrooms, patio enclosures, and all season rooms that work in this coastal climate. Every project is fully permitted, framed for the salt-air environment, and designed for the property it sits on.
Costa Mesa's mild year-round temperatures and ocean proximity make it one of the best places in Orange County to use a glass-walled solarium as genuine living space rather than just a seasonal room. A properly built solarium with low-emissivity glass manages heat gain in summer, captures natural light through the winter marine layer, and holds up against the salt air that comes off the ocean a few miles away. See the full details of our solarium installation service, including the glass systems we recommend for coastal Orange County conditions.
No two Costa Mesa properties are laid out the same way. The Eastside has narrow lots and smaller footprints; Mesa Verde has larger backyards with established patios. A custom sunroom design takes the specific orientation, roofline, and yard conditions of your property seriously rather than forcing a catalog solution onto a house it was not designed for. Custom work also means the finished room looks like it belongs - not like an afterthought bolted onto the back.
Most Costa Mesa homes from the 1960s and 1970s have a concrete patio slab that has been sitting mostly unused for years. Enclosing that slab is often the most cost-effective path to new living space in this city, because the foundation work is already done. An enclosed patio room can be screened for spring evenings, glass-in for a true all-weather room, or built as a middle option that opens up in mild weather and closes against winter rain.
A four season room in Costa Mesa is a climate-controlled addition with insulated glazing, a direct connection to the home's heating and cooling, and framing rated for coastal humidity. These rooms are designed to function like any other room in the house regardless of weather - useful on the foggiest January morning and the hottest August afternoon.
Costa Mesa's long dry summers mean backyard patios often go unused from June through September because there is no shade. A well-built patio cover - aluminum panel, insulated roof panel, or solid-roof attached structure - extends outdoor living into the afternoon hours and protects outdoor furniture from UV damage. A quality cover also simplifies a future enclosure project by providing the structure to work from.
Costa Mesa evenings are often perfect - mild temperatures, ocean breeze, low humidity. A screened room captures those evenings without the cost or complexity of a fully enclosed space. Screen rooms are a natural fit for the Eastside, where smaller lots make a lightweight addition more practical, and for homeowners who want outdoor living space that feels protected without being fully indoor.
Costa Mesa sits about three miles from the Pacific Ocean, and that proximity changes the demands on any structure added to a home here. Salt-laden marine air reaches the city year-round, moving in with the morning fog and settling on metal fixtures, fasteners, and frame systems. Aluminum that is not powder-coated corrodes faster here than it does ten miles inland. Caulk and sealants that perform adequately in Anaheim or Buena Park may fail earlier in Costa Mesa because the humidity cycles between ocean fog and dry Santa Ana winds are more extreme. A contractor who selects materials without accounting for coastal exposure is handing you a maintenance problem within the first few years.
The housing stock adds another layer of complexity. The Eastside has Craftsman bungalows and cottage-style homes from the 1930s and 1940s - structurally different from the postwar ranch homes in Mesa Verde and the central city. The Eastside homes have wood framing, older foundations, and smaller backyards that require careful structural analysis before any addition is attached. Mesa Verde homes from the 1960s and 1970s have stucco exteriors on concrete slabs, and those slabs have been moving on Costa Mesa's expansive clay soil for 50-plus years. Both housing types are common in Costa Mesa, and the right approach to each one is different. Experience with the local building stock is what keeps a room addition looking and functioning correctly a decade from now.
Our crew works throughout Costa Mesa regularly, and permit applications for room additions go through the City of Costa Mesa Development Services Department. We handle that process directly on Costa Mesa jobs - preparing and submitting construction drawings, responding to plan check comments, and scheduling inspections without putting any of that burden on the homeowner.
Costa Mesa is easy to navigate once you know its landmarks. Most residents orient themselves around South Coast Plaza and the Segerstrom Center for the Arts near the center of the city, and the OC Fair and Event Center on the western edge along the 405 Freeway. Residential neighborhoods radiate out from those points in every direction. The streets on the Eastside, near the Newport Beach border, are notably different from the wider residential blocks of Mesa Verde to the north - and we have worked on homes throughout all of those areas.
We also serve homeowners in the cities that border Costa Mesa. If you have neighbors who need sunroom work in Westminster or in Huntington Beach, we serve both of those communities as well.
Call us or fill out the contact form and we respond within one business day. We ask a few questions about your property - location in Costa Mesa, approximate patio size, what you want to use the room for - so we can come prepared.
We visit your Costa Mesa property, check the existing slab or foundation, note the sun orientation, and review the roofline connection. This visit is free and produces a written estimate with the full scope, material specifications, permit costs, and timeline - no pressure, no obligation.
We submit the construction drawings to the City of Costa Mesa and manage the plan check process. Once permits are issued, the crew arrives on the scheduled start date. We protect your existing landscaping and finishes throughout the build.
The city inspector signs off on the finished room and we walk you through the completed space together. We cover any questions about maintenance, glass cleaning, and the warranty on materials and labor before we close out the job.
We serve all of Costa Mesa - from the Eastside to Mesa Verde. Free estimate, no obligation. We respond within one business day.
(657) 364-0879Costa Mesa is an Orange County city of roughly 115,000 people with a strong local identity built around the arts and retail. The Segerstrom Center for the Arts and South Coast Plaza anchor the city's center, and the annual Orange County Fair draws visitors from across the region each summer. The city is divided into distinct neighborhoods with genuinely different characters: the Eastside borders Newport Beach and has tree-lined streets with older Craftsman and cottage-style homes, while Mesa Verde in the north offers larger lots with 1960s and 1970s ranch homes on quiet residential blocks. The Westside has a more working-class feel with closer proximity to industrial neighbors near the 405 Freeway.
Roughly half of Costa Mesa's housing units are owner-occupied, and median home values run well above $800,000 - a combination that means homeowners here tend to invest thoughtfully in their properties. The bulk of the single-family housing stock was built between 1950 and 1979, putting most homes in the 45-to-75-year range where roofing, plumbing, electrical, and insulation have all aged past their original design life. Homeowners throughout Costa Mesa often look to improve and expand their living space rather than move, making room additions a natural part of the local home improvement market. We work in neighboring cities too, including Fountain Valley to the north and Santa Ana to the northeast.
Spots fill up fast - call or submit a request now and we will get back to you within one business day.