Sunroom additions
Expand your home with a professionally built sunroom addition.
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Custom Upland Sunrooms & Patios is a sunroom contractor serving Glendora, CA, specializing in solarium installation, sunroom additions, and four season rooms for the city's foothill and ranch-style homes. We have been building across the San Gabriel Valley since 2019 and respond to every Glendora inquiry within one business day.

Glendora sits at the foot of the San Gabriel Mountains, and a fully glazed solarium is the best way to bring those mountain views inside without giving up climate control. Read more about our solarium installation options, including glass selection and cooling system integration for this foothill climate.
Glendora ranch homes from the 1950s and 1960s were not designed with indoor-outdoor living in mind, but most have the footprint and lot space to support a proper sunroom addition. Adding square footage to an owner-occupied home in this market is one of the strongest investments a Glendora homeowner can make.
Northern Glendora neighborhoods near the foothills see colder winters and stronger Santa Ana winds than the flats down by the 210. A fully insulated four season room handles both the summer heat and the winter drafts so the space works throughout the year.
Glendora homes vary quite a bit from the hillside properties in the north to the grid-pattern lots near Glendora Village in the south. A custom design lets us match your home's roofline, material choices, and HOA requirements while still giving you the space you actually want.
Many Glendora homes have concrete patios that sit unused through the summer because of heat and in the winter because of wind. A patio enclosure converts that underused space into a protected room you can use on any day of the year.
Glendora summers are tough on building materials, and vinyl holds up better than wood under sustained UV exposure and heat cycles. For homeowners who want a low-maintenance sunroom that stays looking clean without painting or sealing every few years, vinyl framing is the practical choice.
Glendora is split between two different property environments that require different approaches. In the northern part of the city, homes near the San Gabriel Mountains foothills sit on larger, sloped lots with mature trees, hillside drainage challenges, and higher exposure to wind and wildfire ember risk. The 2014 Colby Fire burned through the foothills just north of the city, and many homeowners in that area have since become more aware of how their home's materials and construction hold up under fire conditions. A sunroom or solarium on one of these properties needs to account for slope, drainage, and material choices appropriate for a fire hazard severity zone. In the southern and central parts of Glendora, the homes are more standard suburban ranch houses on flat lots - but they are typically 50 to 70 years old, and the original patios and overhangs are often due for a full rebuild rather than a patch.
Glendora summers are hot and dry, with temperatures regularly reaching the mid-90s Fahrenheit and Santa Ana wind events every fall and winter that can gust past 50 mph. Those winds lift shingles, stress patio structures, and expose any weakness in how an enclosure is anchored to your home's framing. Glass selection matters here too: a solarium with standard glass will collect enough heat to become unusable by 10 a.m. in July without proper low-emissivity glass and a cooling solution. These are not abstract concerns - they are the real-world conditions that determine whether your new room gets used or gets abandoned.
Our crew works throughout Glendora regularly, and we understand the local conditions that affect sunroom contractor work here. The Glendora Community Development Department processes building permits for sunrooms and room additions, and we pull permits and manage inspections for every project in the city. If your neighborhood near Citrus College or closer to the downtown Glendora Village area has an HOA, we have experience preparing architectural review submissions and know that the HOA approval step has to come before the city permit - not after.
We work on homes throughout the city, from the hillside streets up near the Angeles National Forest boundary to the flatter neighborhoods near the 210 freeway. Northern Glendora lots are irregular and often have retaining walls or drainage swales that affect where a new room can be placed - we assess all of that as part of the estimate visit. Southern Glendora homes tend to be more straightforward, but older slabs sometimes need reinforcement before a new structure can be built on top.
We also regularly serve neighboring Upland to the west and San Dimas to the southwest, and our crews are familiar with the property types and permit offices across all three cities. If you have seen our work in any of those areas, you already know what to expect.
Call us at (909) 755-8782 or use the online estimate form. Every Glendora inquiry gets a response within one business day - usually the same day during the week.
We come to your Glendora home, evaluate the site conditions - including slope, drainage, and any HOA restrictions - and give you a written estimate with no obligation. Foothill properties get a closer look at soil and drainage before we finalize numbers.
Once you approve the project, we handle the HOA submission if needed and then file for the building permit with the City of Glendora. Permit approval typically takes two to four weeks, and we place your project on the build schedule as soon as it comes through.
Our crew builds the project from foundation to glass, manages the city inspection, and does a final walkthrough with you before we leave. You do not need to be present every day, but we ask that you are available when the inspector visits and at the final review.
We serve all of Glendora - from Glendora Village to the hillside streets near the Angeles National Forest. Contact us today and we will respond within one business day.
(909) 755-8782Glendora is a city of about 52,000 people in the eastern San Gabriel Valley, roughly 25 miles east of downtown Los Angeles via the 210 freeway. The city's southern end is flat and grid-like, anchored by Glendora Village, a walkable historic downtown with tree-lined streets and local shops that residents have gathered around for generations. The northern part of the city climbs into the foothills, where larger lots, winding streets, and mountain views define the neighborhood character. Most of Glendora's housing was built between the 1950s and 1970s - single-story ranch homes with stucco exteriors, concrete patios, and attached garages are the dominant type. About 65% of homes are owner-occupied, and many residents have lived here long enough to know both the city and its contractors well.
Glendora has long been associated with Citrus College, one of California's oldest community colleges, which has been part of the city since 1915. The college sits near the center of the city and is a reference point most long-time residents know well. The San Gabriel Mountains rise immediately north of the city and form part of the Angeles National Forest - the foothills are visible from most streets and give Glendora a distinct character compared to the flatter cities around it. We serve all of Glendora and also work regularly in neighboring San Dimas to the west and Pomona to the south.
Expand your home with a professionally built sunroom addition.
Learn MoreEnjoy your sunroom comfortably through every season of the year.
Learn MoreA cost-effective enclosed space for spring, summer, and fall enjoyment.
Learn MoreTransform your open patio into a protected, usable living area.
Learn MoreFully customized sunrooms designed to match your home and lifestyle.
Learn MoreExpert sunroom construction from foundation to finishing touches.
Learn MoreUpdate and improve your existing sunroom with skilled remodeling work.
Learn MoreScreen rooms that let in fresh air while keeping insects out.
Learn MoreConvert your existing patio into a fully enclosed sunroom space.
Learn MoreTurn your deck into a beautiful, weatherproof sunroom addition.
Learn MoreClimate-controlled rooms you can use and enjoy year-round.
Learn MoreEnclosed patio rooms that add livable square footage to your home.
Learn MoreGlass solarium installations that flood your space with natural light.
Learn MoreDurable patio covers that protect your outdoor space from the elements.
Learn MoreProfessional design services to plan your ideal sunroom layout.
Learn MoreLow-maintenance vinyl sunrooms built for durability and curb appeal.
Learn MoreWe serve all of Glendora and respond within one business day. Call now or fill out the online form - no commitment required.