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CGI Construction in San Martin, CA | Brookside Contractors
If you own a San Martin home with CGI windows or doors that are fogging, sticking, or leaking, we can service them; and the work runs $450 to $25,000 depending on whether you need a repair or full replacement. We’re an independent general contractor, not a CGI dealer, and the thing that sets our San Martin work apart is that we’ve been flashing, trimming, and finishing these units on acreage properties for years. Call (833) 725-3508 to schedule a free estimate. We’re Brookside Contractors, and we serve the whole 95046 zip code.

Why San Martin Residents Choose Us for CGI Service
We know CGI product lines from the inside of San Martin homes, not from a catalog. Our crews have set CGI Sentinel vinyl windows on ranch-style retrofits, hung CGI aluminum patio doors on custom vineyard estates, and re-glazed fogged double-pane units on older farmhouses. We’ve also pulled the permits for that work through Santa Clara County, which matters when you live somewhere unincorporated. Nate Burrell grew up in the Paradise Valley area of Morgan Hill, where our Morgan Hill CGI service is rooted, trained in construction at Gavilan College in Gilroy, and has spent most of two decades on job sites throughout South Santa Clara County. He’s the one who makes sure the crew understands how a CGI frame behaves when it’s been baking on a south-facing wall all July. We’re not authorized by CGI, and we don’t pretend otherwise. Our credibility comes from field time and straight answers. Do it once, do it right; everything else is just a future repair bill.
Styles & brands we work with







Common CGI Construction Problems We Solve in San Martin
Here’s what actually goes wrong with CGI windows and doors in this part of the valley, and why it happens here more often than people expect:
- Fogged double-pane insulated glass. Seal failure on units installed ten or more years ago. We see this constantly on San Martin ranch homes and farmhouses with big, unshaded south and west exposures; the glass cooks all afternoon, the seal lets go, and you get moisture between the panes. Re-glazing with OEM CGI glass units fixes it without replacing the frame.
- Vinyl frame and sash warping on hot walls. South- and west-facing walls take direct inland-valley sunlight for hours. Older CGI vinyl frames and sashes can bow or cup slightly, which opens seals and lets conditioned air leak out. Sometimes the unit needs a new sash; sometimes the frame itself is done.
- Failed perimeter seals and gasket shrinkage. Sun and dry heat crack and shrink exterior gaskets faster than coastal air does. After the first hard winter rain, water finds those gaps and stains the drywall under the window. We re-seal and re-flash; we don’t caulk over the problem and call it fixed.
- Sticking or hard-to-latch sliders and hung windows. This shows up on custom San Martin homes where rough openings were framed slightly out of square. The window goes in, the frame settles, and the sash binds. We correct the alignment and set new hardware so the unit latches properly again.
- Leaks at the sill on CGI sliders. On multi-acre properties with older decks and patios, water ponds at the base of slider tracks during winter rains. We re-flash the rough opening, reset the pan, and replace the weather stripping. That’s a repair, not a replacement, and it’s usually done in a day.
CGI Service in San Martin: What Local Conditions Mean for Your Equipment
San Martin is unincorporated, and that changes how window and door work gets permitted. Our scopes on acreage homes go through Santa Clara County, not a city building department; on rural rebuilds we routinely coordinate with the local fire district on access and water-supply requirements before we can even finalize exterior opening locations. Say you’re adding a wing to a farmhouse off Llagas Road and you want the new CGI units to match the old ones. The county needs to sign off on the structural opening, the fire district needs to confirm the driveway can get a truck and a water tender to the structure, and only then do the window specs get locked. In Morgan Hill or Gilroy, that path looks different. We’ve run it enough times in San Martin that we build the extra coordination into the schedule instead of letting it ambush the homeowner mid-job. That’s the real difference between a window contractor who happens to work in San Martin and one who actually knows how San Martin works.
CGI Models & Products We Service in San Martin
We service the CGI Sentinel vinyl line, including double-hung and slider configurations; CGI aluminum series patio doors; CGI vinyl replacement windows for ranch-style retrofits; and CGI custom-shape and specialty units that show up on vineyard-estate builds. Our parts approach is honest. When a frame is sound, we source OEM CGI replacement sashes, glass units, and hardware. When OEM isn’t practical, we use vetted aftermarket seals and flashing and tell you exactly what we’re doing and why. We also tell you straight when a unit is worth re-glazing versus when a full frame replacement is the smarter spend. On multi-acre ranch properties with a dozen or more windows, that conversation can save real money. For a full overview of what we support, see our CGI sales & service page.
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AfterCGI Service Pricing in San Martin
Pricing depends on whether you’re repairing existing units or replacing them, and whether the windows are standard-size or custom. Here are the ranges we quote for San Martin Home Remodeling work:
| Service | Price Range |
|---|---|
| Roof Repair | $400 – $1,800 |
| Window Replacement | $4,500 – $15,000 |
| Impact Window Installation | $8,000 – $25,000 |
| Home Addition | $45,000 – $130,000 |
What drives the cost: how many units, what condition the frames are in, whether you need county permits, and whether the openings are standard or custom-shaped. Every estimate is free, in writing, and line-itemed so you can see exactly where the money goes. Call (833) 725-3508 and we’ll walk the property, take measurements, and hand you a number you can actually plan around.

Serving San Martin, CA — Our Local Coverage Area
We’re based in the San Martin 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 San Martin
Yes. San Martin is unincorporated, so permits run through Santa Clara County. When the scope involves structural openings, additions, or fire-district access requirements, we handle the permit package, coordinate inspections, and make sure the work closes out clean. Call (833) 725-3508 and we’ll tell you whether your specific job even needs one.
In most cases, yes. Fogged glass is a failed seal in the insulated unit, not a failed frame. We source OEM CGI replacement glass units and swap them into the existing sash, which costs far less than a full-frame tear-out. The frame stays, the view clears, and the seal is new. Call (833) 725-3508 for a quote on your specific units.
Hours of direct inland-valley sun on south and west walls puts real stress on vinyl frames, sashes, and seals. Frames can soften and bow, gaskets dry and shrink, and glass seals fail faster than they do on shaded or coastal homes. We replace with OEM components sized for the opening, and we check flashing and exterior seals so the next heat wave and the next rain season don’t undo the repair.
Yes. For San Martin ranch-style additions, we match new CGI replacement units to the existing line, sightlines, and color. When the original CGI model is discontinued, we find the closest current equivalent and tell you up front where it differs. That’s part of keeping the whole addition look intentional instead of bolted on.
We do both. If the frame is square and sound, we repair; we re-align tracks, replace worn hardware, and get the unit latching properly. If the frame is warped or the rough opening has settled badly, replacement is the straight answer. We’ll tell you which one you actually need. Call (833) 725-3508 for a free assessment.
Service Areas Near San Martin
We serve the South Santa Clara County corridor, including Morgan Hill, San Martin service area, CGI service in Gilroy, CGI service in Corralitos, Interlaken, and Day Valley. If you’re nearby but outside those spots, call and ask; we’ll tell you straight whether we can get to you.
Book Your CGI Service in San Martin Today
Fogged glass, leaking sills, or a slider that won’t latch; whatever’s going on, we’ll look at it, tell you what it needs, and quote it in writing. Call (833) 725-3508 to schedule your free San Martin estimate.
Written by Nate Burrell, Owner & San Martin General Contractor, Brookside Contractors, serving San Martin since 2008.