Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
CGI Construction in Santa Ana, CA | Rowan Construction Group
We provide independent CGI sales & service across Santa Ana, with a focus on impact windows and doors retrofitted into the city’s pre-1960 wood-frame bungalows. The one thing that makes CGI work here different from anywhere else in Orange County is the permit layer: the City of Santa Ana routinely requires as-built documentation for unpermitted additions before any window retrofit gets final sign-off. Call (470) 298-9650 for a written estimate that accounts for the full scope, not just the window swap.
Why Santa Ana Residents Choose Us for CGI Service
We have handled CGI repair in Irvine and installed CGI windows and doors across this city’s aging housing stock for years, and Grant Rowan, our owner, trained in construction technology at Los Angeles Trade-Technical College before he ever touched a paying job. That training shows in how we approach a CGI retrofit: we look at what is behind the window first. In Santa Ana, that means opening the wall and finding shallow 2×4 stud bays, original lathe-and-plaster, or a rear addition from the 1980s that was never permitted. Most contractors measure the opening and order the unit. We measure the wall, the anchor points, and the permit file. We’re an independent contractor, not a CGI-authorized dealer, which means our recommendation is based on what the house needs, not what a manufacturer wants us to push. We use genuine CGI parts, but we’ll tell you when a repair no longer makes financial sense.
Common CGI Construction Problems We Solve in Santa Ana

- Failed or missing anchors on impact windows. Older Santa Ana walls were framed with 2×4 studs at 16 inches on center, and plenty of retrofit installers skipped structural anchoring entirely. When the Santa Ana winds hit 50-60 mph, an unanchored CGI Sentinel casement will rack in the opening, and you’ll feel the draft and hear the rattle.
- Fogged insulated glass units in CGI Sentinel windows. South and west elevations in Santa Ana get hammered by decades of UV exposure and thermal cycling. The IG seal fails, moisture gets between the panes, and the once-clear view turns permanently cloudy. This is a replacement, not a repair.
- Corroded or seized rollers on CGI Magnum sliding doors. Garage conversions across Logan and Lacy sit on slab-on-grade concrete over expansive clay. The slab settles unevenly, the track misaligns, and the rollers seize. Binding doors get forced, and forced doors break hardware.
- Water intrusion at the sill flashing on CGI Estate windows. Retrofit panning over original lathe-and-plaster with no modern drainage plane was common practice years ago. The first heavy rain after a dry stretch reveals the staining on the interior sill.
- Permit entanglement from unpermitted rear additions. The City of Santa Ana will not issue a permit for a window replacement if the window is in a room that was added without permits. The window job becomes a compliance job. We handle both.
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In the Logan and Willard neighborhoods specifically, the city’s mandatory as-built submittal for any permitted exterior window replacement often requires documenting and legalizing entire rear additions before a single CGI window can be installed. A homeowner calls us for three fogged windows on the back of the house. We pull the permit history and find the rear addition from 1984 was never recorded. Before Santa Ana’s Building Division will release the permit, we need to produce drawings showing the addition’s footprint, foundation type, and electrical. That makes a window retrofit the catalyst for whole-envelope code compliance rather than an isolated upgrade. This does not happen in Irvine or Mission Viejo, where the housing stock is post-1970 and mostly permitted from day one. In Santa Ana, the window is the door to the rest of the file. We prepare our customers for that reality before the first wall is opened, and it’s written into the estimate.
CGI Models & Products We Service in Santa Ana

We work on the full CGI residential line that appears in Santa Ana homes. The Sentinel Series impact-resistant casements and picture windows show up on original 1930s-1950s casement replacements. The Estate Collection vinyl single-hungs and sliders are common in 1980s additions. The Classic Series aluminum storefronts and sliding doors appear in older garage conversions, and the Magnum Series heavy-duty impact sliders are the go-to for patios facing the wind. We use genuine CGI replacement parts-sash balances, rollers, weatherstripping, and hardware-sourced through independent distributors. When a part is obsolete on an older CGI line, we specify certified aftermarket parts engineered for impact-rated assemblies, never a generic hardware-store substitute. For windows with failed IG units or corroded frames, we recommend replacement when repair cost exceeds 60% of a new unit.
CGI Service Pricing in Santa Ana
These are the line-item ranges we quote for Santa Ana CGI work. They are flat written prices, not estimates that drift.
| Service | Price Range |
|---|---|
| Impact Window Installation | $8,000-$25,000 |
| Window Replacement | $4,500-$15,000 |
| Emergency & Storm Damage | $400-$1,800 |
Your free estimate walks the property in person, opens the affected windows or doors, checks the anchoring and flashing, and reviews the permit history. You receive a written scope with a fixed price before any work starts. Call (470) 298-9650 to book it.
Serving Santa Ana, CA - Our Local Coverage Area

We’re based in the Santa Ana area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - CGI Construction in Santa Ana
Santa Ana’s namesake offshore winds routinely exceed 50 mph in fall and winter, which means anchored installation is not optional. We install CGI anchoring clips with stainless steel fasteners into full-depth nailers at every designated anchor point, not just the corners. A window that meets Miami-Dade impact ratings can still fail in a Santa Ana gust if the anchoring into the old framing is incomplete. Call (470) 298-9650 and we’ll inspect your existing anchoring before you spend a dollar on new glass.
No, and you should not trust a contractor who says yes. The City of Santa Ana Building Division will not issue a permit for window work in an unpermitted addition until an as-built plan is submitted and approved. We prepare that documentation ourselves, coordinate with the inspector, and build the timeline into the project schedule. The delay is real, but skipping it means the job never gets a final sign-off. We’d rather tell you the truth on day one than explain the lien later.
Santa Ana sits inland, with hotter summers, colder winter nights, and lower humidity than coastal cities. That wider daily temperature swing stresses the IG seal more aggressively, especially on south and west elevations with direct afternoon sun. A CGI Sentinel window in Huntington Beach can go 20 years without a failed seal; the same window on a west wall in Santa Ana might fog in 10. We replace failed IG units with current CGI or certified aftermarket IG construction that matches the original’s impact rating.
Yes. The CGI Estate and Sentinel lines both offer Low-E glass packages and thermal breaks that satisfy current Title 24 energy requirements for residential window replacement in Santa Ana. When we quote a replacement, the glass package is specified in the written scope so there is no ambiguity about what gets installed. Bring us a competitor’s written estimate and we’ll review it line by line at no charge.
We first determine whether the slab has stopped moving or is still settling. If it has stabilized, we realign the track, replace the rollers with the correct CGI or certified aftermarket assembly, and adjust the strike. If the slab is still moving, we’ll tell you before spending your money on hardware, because no roller set will survive an actively settling slab. A binding CGI Magnum door in a garage conversion is one of the most common calls we get from the Logan and Willard neighborhoods. Call (470) 298-9650 for an inspection and a written recommendation.
Service Areas Near Santa Ana

We serve Santa Ana and the surrounding communities across Orange County, including our full Santa Ana service area, Tustin, Garden Grove, Fountain Valley, and Orange. For comparison, we also operate CGI service in Riverside and CGI service in Stockton, where the housing stock and permit environment are different from what we see here.
Book Your CGI Service in Santa Ana Today
If your CGI windows or doors are fogged, binding, leaking, or rattling in the wind, call (470) 298-9650 to schedule a free estimate. We’ll put the number in writing, and Grant will walk you through exactly what’s behind the wall before anyone picks up a tool. Measure twice, say it once, show your work.
Written by Grant Rowan, Owner at Rowan Construction Group, serving Santa Ana since 2007.







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