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ES Windows Construction in San Martin, CA | Gold Star Contractors
We provide independent ES Windows construction, replacement, and service across San Martin’s 95046 zip code, with ES Windows in Corralitos also within our coverage area. The thing that makes our ES Windows work different here is simple: we deal with Santa Clara County permitting, private wells, septic setbacks, and agricultural grading on nearly every rural project. If you’re planning a window replacement, addition, or shop build on acreage, call (833) 382-8544 and we’ll walk you through how county rules shape the job before the first window comes out.

ES Windows are common on the ranch-style homes and newer custom builds that define San Martin’s housing stock, and we’ve serviced enough of them to know exactly how the vinyl frames, sashes, and dual-pane glass hold up under this valley’s hot summers and dusty rural lot conditions. We’re a full-scope General Contractor – San Martin, not an authorized ES Windows dealer or manufacturer rep, which means our recommendations don’t bend toward a brand pitch. If the frames are sound, we repair. If they’re warped, we replace and we’ll tell you what’s actually worth spending on.
Why San Martin Residents Choose Us for ES Windows Service
Noel Carranza, our owner, grew up watching Orange County tract homes get renovated block by block, and that early exposure to how buildings actually go together shaped how we run jobs today. He studied construction technology at Fullerton College and spent years doing concrete, framing, and finish carpentry before building Gold Star Contractors. What that means for your San Martin window project: we speak the same language as the county inspector, the septic engineer, and the well contractor, because we’ve coordinated all three on rural parcels more times than we can count.
San Martin homeowners don’t want to juggle a window guy, a general contractor, and a county permit runner. With us, it’s one project team. We specify the brand, manage the install, and stand behind the result. Our ES Windows sales & service experience covers OEM sashes, balances, and hardware where available, and we stock common weatherseal and glazing materials locally so turnaround on repairs doesn’t drag out across county inspection timelines.
Your home is too important to coordinate five different contractors. We handle the window, the flashing, the permit, and the site work as one accountable crew.
Styles & brands we work with







Common ES Windows Construction Problems We Solve in San Martin
- Vinyl frame expansion and sash binding on south- and west-facing walls. San Martin summers are hot and dry, and windows with no shade from an orchard or porch overhang take direct heat all afternoon. We regularly see ES Windows single-hung units where the vinyl frame has expanded enough that the sash binds and won’t latch. The fix is either re-balancing and adjusting, or full sash replacement when the frame is too far gone.
- Dust intrusion from failed weatherstripping and glazing seals. Graded rural lots and orchard-side properties kick up fine dust that finds every gap. When the original weatherstripping on an ES Windows sliding unit dries out and cracks, that dust ends up on your sill and in your tracks even with the window closed.
- Condensation and fogging in dual-pane insulated glass. A lot of San Martin ranch homes are hitting the 15 to 20 year mark on original glazing, which is exactly when dual-pane seals start failing. Fog between the panes means the insulating gas is gone and the unit isn’t doing its thermal job anymore.
- Water intrusion at sill pans and flashing on additions and shop structures. When agricultural grading directs runoff toward a wall, a window set into that wall has to be flashed correctly or water finds the opening. We’ve pulled apart windows on barns and shops where the original flashing was little more than caulk and good intentions.
- Warped sashes that no longer latch or lock. On west-facing walls, especially on older ranch-style homes with little tree cover, the vinyl itself can warp beyond adjustment. That’s a safety issue as much as an efficiency one, and it’s where we walk you through a repair-vs-replace decision honestly.
ES Windows Service in San Martin: What Local Conditions Mean for Your Equipment
Here’s the San Martin-specific reality most window pages won’t tell you: because this community is unincorporated, window work on an addition or accessory structure often runs through Santa Clara County permitting, and on acre-plus parcels that can trigger well setbacks and septic clearance before the window or wall work gets signed off. That’s not a thing on a standard tract-lot job in Gilroy or Morgan Hill. A homeowner off the Llagas Road corridor might want a new shop with windows on the south wall, only to find the leach field sits exactly where the grading plan needs to run. We handle that coordination. On one ranch-style property off Llagas Road, our crew replaced a set of sun-baked ES Windows vinyl single-hung units on a west wall where the sashes had warped and stopped latching. We re-flashed every opening, set new OEM-matched sashes, and because the property sat on a private well and septic, we coordinated the county inspection and kept grading clear of the leach field before buttoning up the exterior trim. That’s the difference between a window crew and a general contractor who understands rural parcels.
Hot summer scheduling matters too. We plan window installs and exterior work around heat, dust control on graded lots, and drainage or swale work ahead of the winter rains. On a site with no shade and a long west elevation, starting a window replacement in the middle of a July afternoon is slower and harder on the materials. We stage around it.
ES Windows Models & Products We Service in San Martin
We work on the full range of ES Windows product lines you’re likely to find on a San Martin property: vinyl single-hung replacement windows, horizontal sliding vinyl windows, fixed and picture window units, and vinyl patio sliding doors. For parts, we use ES Windows OEM sashes, balances, and hardware where they’re available so the fit and finish match the original frame exactly. Where OEM is discontinued, we turn to quality aftermarket glass units and weatherseal that hold up to valley heat and dust. We keep common seal and balance stock on hand for faster San Martin turnaround, and we carry a working knowledge of the older ranch-home frame profiles that show up again and again in this area.
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AfterES Windows Service Pricing in San Martin
Here’s what ES Windows construction and replacement work typically costs in the San Martin market. These ranges reflect the county permitting, rural site access, and grading conditions we see on unincorporated parcels here.
| Service | Price Range |
|---|---|
| Window Replacement | $4,500 – $15,000 |
| Impact Window Installation | $8,000 – $25,000 |
| Home Addition | $45,000 – $130,000 |
What drives the number: the count and size of windows, whether county permits and septic or well setbacks come into play, and how much flashing and site work the rural lot requires. A straight replacement on a tract-style slab home costs less than windows set into an addition with grading and drainage unknowns. Our free estimate includes a line-item quote so you see exactly where your money goes before you sign anything. Call (833) 382-8544 for an exact number on your project.
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 – ES Windows Construction in San Martin
In most cases, a straight window replacement on an existing opening in San Martin falls under county rules that are simpler than a full addition, but if you’re changing the rough opening size or adding new windows to an accessory structure like a shop or barn, Santa Clara County permitting applies and may trigger well setback and septic clearance review on rural parcels. We pull the permits, coordinate the inspections, and handle the paperwork as part of the job. Call (833) 382-8544 and we’ll tell you what your specific project triggers before you start.
That’s vinyl frame expansion from the heat of San Martin’s long afternoon sun, especially on south- and west-facing walls with no shade. The vinyl expands, the sash binds in the track, and over time the frame can warp permanently if it’s left unshaded for enough seasons. We repair adjustable sashes and replace warped ones, and we’ll tell you honestly which is which.
Yes, if the vinyl frame is still sound we replace only the insulated glass unit with a new dual-pane unit that matches the original dimensions. When the frame itself is warped or the seals are failing across most of the house, replacement is the better money. We’ll show you both numbers and let you decide. Estimates are free at (833) 382-8544.
It can, and on acre-plus rural parcels it often does. Santa Clara County reviews well setback distances and septic clearance when an addition or new accessory structure changes the building footprint, and windows set into that new structure are part of that review. We coordinate the site work and the inspection so grading stays clear of the leach field and the project moves without a county stop-work order.
Yes. We match ES Windows vinyl single-hung, horizontal slider, fixed picture units, and patio sliding doors to the existing house or to the new structure’s plans, and we use OEM sashes and hardware where the original models are still available. For older discontinued frames, we source quality aftermarket parts that match the millwork and glazing profile. Call (833) 382-8544 for a free estimate on matching windows for your addition or shop.
Service Areas Near San Martin
From our San Martin work base, we also serve nearby communities across the southern Santa Clara Valley and into the wider region. If you’re in Morgan Hill, Gilroy, San Martin service area neighborhoods, or spots like ES Windows service in Amesti and ES Windows service in Aptos Hills-Larkin Valley, we can bring the same county-permitting and rural-lot expertise to your project. One call covers the window, the site work, and the inspection.
Book Your ES Windows Service in San Martin Today
If your ES Windows are binding, fogging, leaking, or just tired after 15 years of valley sun, call Gold Star Contractors at (833) 382-8544. We’ll schedule a free estimate, walk the site with you, and give you a line-item quote for repair or replacement on your San Martin home or rural property. One call, done right – that’s the only way we know how to run a job.
Written by Noel Carranza, Owner at Gold Star Contractors, serving San Martin’s unincorporated rural properties and the surrounding Santa Clara Valley.