Four Season Sunrooms
Fully insulated, year-round rooms connected to your HVAC - the next step up from a standard sunroom addition.
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Serving Upland, CA and surrounding areas. (909) 755-8782
You want more living space without the cost of moving. We build permitted sunroom additions in Upland designed to stay comfortable even when temperatures push past 100 degrees.
Sunroom additions in Upland, CA are permanent room additions built with a real foundation, framed walls, a proper roof, and windows on most or all sides - most projects take four to twelve weeks from permit approval to move-in, depending on size and site conditions.
A lot of Upland homeowners come to us because their existing patio or backyard space just sits empty for months. The heat drives everyone inside, and a covered porch doesn't cut it when temperatures climb into triple digits. A properly built, insulated sunroom changes that. If you're also weighing a fully climate-controlled option, see our four season sunrooms page for a side-by-side comparison.
Every addition we build goes through the City of Upland's permit and inspection process. That's not optional - it protects your investment and makes sure the finished room shows up correctly on an appraisal when you're ready to sell.
If you stop using your outdoor space by late May because the heat is brutal, you're losing months of enjoyment every year. Upland's summers regularly push past 100 degrees, and a well-built sunroom with quality glass and cooling gives you that space back.
An existing covered slab or porch is often a natural starting point for a sunroom addition - the foundation work may be partially done already. If it's too hot, too exposed, or just not comfortable, that space is worth converting rather than leaving idle.
Upland home prices have climbed steeply in recent years, and moving to get more space is expensive. If your family needs a home office, a playroom, or a proper guest room, a sunroom addition adds real square footage without the disruption of a full interior renovation.
If your existing aluminum patio cover or screen enclosure is showing rust stains, bent frames, or water pooling on the roof, that's a natural moment to upgrade to a permitted sunroom instead of repairing what you have. A proper addition will outlast a patched cover by decades.
We handle the full project - design, permits, foundation, framing, windows, roofing, and electrical. Every build starts with an in-person site visit so we can assess your foundation, roofline, and existing structure before quoting anything. If you need a brand new concrete slab, we account for Upland's expansive clay soils in the foundation design. If your property is near the foothills, we check your fire hazard zone designation before finalizing materials. And if your neighborhood has an HOA, we prepare the documentation the association requires so you're not doing that paperwork alone.
Most homeowners in Upland choose between a three-season room and a fully insulated four-season room. The right choice depends on how you'll use the space and what your budget allows. We also build dedicated sunroom construction projects for homeowners who want a custom design from the ground up, including custom rooflines, specialty glass configurations, and integrated HVAC. Whatever direction you go, the permit, the inspections, and the written warranty come with every project.
Suits homeowners who want a comfortable spring-through-fall space at a lower price point.
Ideal for homeowners who want a fully insulated, year-round room connected to their HVAC.
Best for homes with an existing covered slab that can become the foundation for the addition.
Right for homeowners who want the sunroom to blend seamlessly with their home's existing architecture.
Covers the full approval workflow for homeowners in Upland's HOA-governed neighborhoods.
Upland sits at the foot of the San Gabriel Mountains in the Inland Empire, where summer temperatures regularly climb above 100 degrees and the heat radiates off surrounding pavement well into the evening. A sunroom built with standard single-pane or low-quality glass will trap that heat and become unusable from June through September. We specify high-performance low-e glass on every project we build in this area - it's not an upgrade, it's the baseline. The clay soils common across this part of San Bernardino County also expand and contract with the wet and dry seasons, so our foundations are designed with that movement in mind from the start.
We've built additions for homeowners throughout the area, including Rancho Cucamonga and Ontario. Whether your home is in one of Upland's older ranch-style neighborhoods near Euclid Avenue or in a newer subdivision up near the foothills, we'll assess the existing structure and tell you exactly what the project involves before you commit to anything. For guidance on what California requires for new additions, the California Contractors State License Board is a good starting point.
You call or submit a request, and we'll get back to you within one business day. We schedule a free in-person visit to walk your yard, look at your existing structure, and talk through what you're hoping to build. No accurate quote can be given without seeing the site.
After the visit, we put together a detailed written proposal that covers scope, materials, timeline, and full cost broken down by phase. This is the document you compare - not a ballpark number over the phone. We don't move forward until you've approved every line of it.
We handle the City of Upland Building and Safety Division permit application, the drawings, and if you have an HOA, the architectural review submission. This phase typically takes four to ten weeks. Permit timelines in Upland can vary, so we build that buffer in from the start.
Once permits are approved, we break ground. Foundation, framing, windows, roofing, and electrical all happen in sequence, with city inspections at each stage. The main construction phase typically runs two to four weeks for a standard room. We walk you through the finished space before we close out the project.
No obligation. We visit your home, answer your questions, and give you a written quote you can actually use to compare.
(909) 755-8782We hold a current California contractor's license - you can verify it yourself on the CSLB website in about two minutes. Licensing means we're legally accountable for our work in a way an unlicensed contractor is not. It also means our workers are covered by insurance while on your property.
We never skip the permit process. Every addition we build goes through the City of Upland Building and Safety Division, which means city inspectors verify the work at every major stage. You'll receive copies of the final permit and inspection records - documentation that protects you when you sell.
Upland's expansive clay soils swell in wet winters and shrink in dry summers. A foundation that ignores this will crack. We assess soil conditions before designing your footings so the room stays level and tight for the long term - not just for the first few years.
Many of Upland's planned communities require separate HOA approval for exterior additions. We prepare the documentation, handle the submission, and follow up - so you're not navigating two approval processes at the same time. A homeowner's experience with the National Sunroom Association outlines what a well-prepared submission looks like.
Taken together, these aren't marketing talking points - they're the practical reasons a sunroom built by us will pass inspection, hold up through Santa Ana wind season, and add real value to your home rather than creating problems at resale.
Fully insulated, year-round rooms connected to your HVAC - the next step up from a standard sunroom addition.
Learn MoreCustom builds from the ground up for homeowners who want a fully tailored design, roofline, and layout.
Learn MorePermit timelines in Upland mean the sooner you start, the sooner you're in your new room - contact us today to lock in your project date.