Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
ECO Window Systems Home Additions & ADU: The San Jose Owner’s Guide
If you’re planning a home addition or ADU in San Jose and want ECO Window Systems windows and doors integrated into the build, we install them. A full home addition with ECO Window Systems products typically runs $53,100 to $153,400 in San Jose, depending on square footage, foundation work, and how many window and door openings the plan calls for. Most owners reach out to us after they’ve seen a neighbor’s addition, or after a contractor handed them a bid with window brands they didn’t recognize. That’s usually where we start: matching the right ECO Window Systems units to the structural plan, then pricing the whole job in writing before any tools show up.
Straight number, written scope, done when we said done. That’s how Curtis Lane runs Bradford Remodeling Co San Jose, and it applies to every addition and ADU we frame, weatherproof, and finish. We are an independent contractor, not affiliated with ECO Window Systems, but we work with their product line regularly because San Jose homeowners ask for it by name.
Which ECO Window Systems Models This Applies To
ECO Window Systems builds vinyl and aluminum window and door lines that show up often in San Jose additions and ADUs. The compatibility question isn’t usually about the glass itself; it’s about the rough opening dimensions and the frame depth. ECO units come in standard and custom sizes, and the difference matters when you’re matching an existing home addition or tying a new ADU into the main structure. We measure every rough opening before we order, and we order from the ECO spec sheet, not from memory.
The OEM-versus-aftermarket decision for ECO Window Systems is straightforward on an addition or ADU job. For new construction, OEM ECO units make sense: you get the full manufacturer warranty, and the units arrive sized to the plan. For a repair on an existing ECO window, hardware like balances, locks, and weatherstripping can often be matched with OEM parts, and we stock the common failure items on the truck. The gotcha in San Jose is the coastal marine layer and summer dry heat: vinyl frames move, and a unit that fit tight in January can bind by August. We account for that in how we set reveals and flash the openings. KraftMaid cabinetry, Cambria or Silestone counters, and the rest of the finish package get specified the same way: by brand, by part number, in writing.
Styles & brands we work with
Signs Your ECO Window Systems Home Addition or ADU Needs Attention
- Condensation between the panes on an ECO unit. The insulated glass seal has failed. It won’t dry out on its own, and the window’s thermal performance is compromised. In a San Jose winter, that means a colder room and higher heating cost.
- Windows that stick or bind when you open them. Vinyl frame expansion from temperature swings is the usual cause, especially on south-facing and west-facing walls. Sometimes a track adjustment fixes it; sometimes the sash needs to be re-squared in the opening.
- Drafts around the perimeter of an ECO window or patio door. The weatherstripping has compressed or the original install was not properly shimmed and sealed. We find this on older additions where the flashing was done with tape that has since dried out.
- Water staining below a window or at the base of a patio door. That’s a flashing or sill-pan failure, not a window failure. The fix means removing the unit, repairing the substrate, and reinstalling with a proper sill pan and back dam. If you ignore it, the rough opening rots.
- Difficulty locking an ECO sliding door or casement window. The hardware is worn, or the frame has shifted enough that the locking points no longer align. It’s a security issue as much as a convenience one. A door that doesn’t lock is an open invitation.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
| Work Scope | Typical San Jose Price Range |
|---|---|
| Full home addition with ECO Window Systems windows/doors | $53,100 – $153,400 |
| ADU construction (complete, with ECO windows and doors) | $106,200 – $259,600 |
| Garage conversion with ECO windows and doors | $35,400 – $94,400 |
| Window replacement (existing ECO or compatible units) | $5,310 – $17,700 |
What drives the range on a San Jose addition: foundation type, ceiling height, whether the plan needs structural engineering, and how many ECO units the design specifies. Parts and labor are separate line items on our written estimate. You’ll see the exact window and door models, the flashing system, the insulation, the drywall, the paint, the trim. No allowances, no “to be determined.” The 365-Day Done Right Promise covers the completed work for a full year. If something fails inside that window, we return and correct it at no charge. That’s The Garrison Standard: every price and every guarantee in writing before a single tool comes out.
DIY or Call Us?
Some things you can check on your own. If an ECO window is hard to open, clean the track and look for obvious debris before you assume the frame is bad. If a lock isn’t engaging, look at the alignment of the locking points. That’s about where the safe DIY ends. Installing or replacing windows on an addition means working at height, handling heavy glass units, and getting the flashing and waterproofing right so the rough opening doesn’t rot out over time. A window install done wrong won’t show itself for a year or two, and by then you’re cutting out drywall to find the damage. We’d rather set the unit correctly the first time. For a straight answer on your specific job, call (669) 272-2637.
FAQs
Expect 15 to 25 years from the vinyl frames and insulated glass units in San Jose’s climate, with hardware and weatherstripping wearing out sooner and needing replacement along the way. The biggest variable is sun exposure: south-facing and west-facing units fail faster. If you’re pricing a replacement, call (669) 272-2637 for an exact number.
Yes, if the frame is sound and the problem is isolated to hardware, weatherstripping, or a lock mechanism. A failed insulated glass seal means replacing the sash or the entire unit, depending on the ECO model. We’ll tell you which one applies to your window before we quote anything. Call (669) 272-2637 and we’ll walk through what you’re seeing.
For a typical addition or ADU, the window and door package installs in one to three working days once the rough openings are framed and dried in. Custom-sized ECO units can add lead time on the order side; we factor that into the written schedule before we start. Call (669) 272-2637 to get a timeline specific to your job.
We stock common ECO hardware and weatherstripping on the truck for service calls, and we order full window and door units from the ECO spec sheet for additions and ADU builds. If we don’t have the part on hand, we’ll tell you exactly when it lands. Estimates are free; call (669) 272-2637.
Written by Curtis Lane, Owner, Bradford Remodeling Co at Bradford Remodeling Co San Jose, serving San Jose and nearby areas.
