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CWS Construction in El Cajon, CA | Penhallow Remodeling San Diego
We provide independent CWS construction service across El Cajon, from legacy window retrofits to General Contractor - El Cajon kitchen remodels built around original CWS millwork. The thing that makes our CWS work different here is that we know this valley’s heat, and we know how 1960s and 70s CWS components fail under it. You get a written price before any work starts, a defined arrival window, and a 365-day guarantee that covers the entire job. Call (619) 604-9624 for a free estimate.
Trevor Nash runs our San Diego crews, and he learned framing at LA Trade-Technical College the old way: measure twice, no shortcuts. That’s how we approach every CWS project in El Cajon, whether we’re reframing a window opening on Lexington Ave or rebuilding kitchen cabinets that have baked in decades of valley sun. We’re an independent CWS service provider, not a manufacturer affiliate, and we carry both genuine CWS millwork and premium aftermarket components so you’re never boxed into one expensive option.
Why El Cajon Residents Choose Us for CWS Service

Two reasons, mostly. First, we actually know what we’re looking at when a CWS double-hung sash won’t budge or a pre-hung door binds in its frame. Over a decade of this work, we’ve seen which CWS components hold up in El Cajon’s dry heat and which ones warp, crack, and fail. Second, we put the number in writing before the first tool comes off the truck. You’ll get a line-item price for the CWS repair or retrofit, not a verbal range that grows once demo starts.
Our technicians are background-checked and show up in uniform, and a live person answers our phones 24/7. If the work fails inside a year, we come back and fix it at no charge. That’s the 365-Day Done Right Promise, and it’s in writing on every project. For homeowners in El Cajon who’ve been burned before, that’s usually the part that matters most.
Styles & brands we work with







Common CWS Construction Problems We Solve in El Cajon
- Warped CWS window sashes that stick and lose their seal. El Cajon’s low humidity and summer temperatures over 90°F dry out wood sashes from the 1940s through 70s. They bind in their frames, the weatherstripping flattens, and you’re paying to cool air that leaks straight through the glass. We repair what’s salvageable and reframe when it isn’t.
- CWS pre-hung door rot at the bottom rail. Older stucco homes often had CWS exterior doors installed without proper flashing. Occasional Santa Ana-driven rain and irrigation overspray soak the bottom rail, and rot sets in. We rebuild the rough opening, flash it correctly, and reset the door so water sheds away from the house.
- CWS closet system tracks that misalign on settling foundations. Homes in El Cajon built on expansive soils shift over time. We see it regularly in the multi-family buildings along Main Street, where closet tracks lose alignment and shelves sag or pull from the wall. We can re-level and reinforce what’s there, or rebuild if the underlying framing has moved too far.
- CWS exterior door weatherstripping that’s lost its compression. Extreme, sustained heat cooks the original gaskets on older CWS door systems. Once they flatten and crack, hot valley air infiltrates into the house and your AC works harder. Replacing the weatherstripping is usually a same-day fix.
- Failed Title 24 compliance on original CWS windows. Many 1970s CWS single-pane units don’t meet current U-factor and SHGC requirements. We upgrade to dual-pane low-E glass and reframe as needed, so the job passes inspection and actually performs in this climate.
CWS Service in El Cajon: What Local Conditions Mean for Your Equipment

Here’s something that’s true in El Cajon and not true fifteen minutes west in La Mesa or San Diego proper. El Cajon requires all window replacements to meet Title 24 energy standards, and a large share of CWS windows from the 1970s fail those requirements outright. The U-factor measures how much heat passes through the glass, and the SHGC measures how much solar heat gets transmitted. Older CWS single-pane units are terrible on both counts. That means we frequently reframe openings and install dual-pane low-E glass even when the original frames appear salvageable on the surface. The frame might look fine, but the glass it was built around can’t meet code, and we’re not going to hang a new window that fails inspection and drives up your cooling bill.
Our techs recently pulled a set of CWS Signature Series double-hung windows from a 1962 stucco home on Lexington Ave. The sashes had warped past the point of repair after decades of valley heat. We reframed the openings, installed dual-pane low-E units with Title 24-compliant flashing, and rebuilt the interior trim to match the original CWS profile. The homeowners’ cooling bills dropped by a visible margin the first summer. That’s the kind of work this climate demands, and it’s the kind we do most often here.
For more on how we approach CWS work across the broader region, see our CWS sales & service page.
CWS Models & Products We Service in El Cajon
We service the full range of CWS product lines you’re most likely to find in El Cajon’s older homes. That includes the Legacy Series pre-hung interior door units, Signature Series wood window units, Craftsman Series exterior door systems, and Custom Closet Organizer Systems. If your home was built between the 1940s and 1970s, there’s a strong chance at least one of those lines is still in place.
We source genuine CWS hardware and millwork when it matters for a structural or aesthetic match, and we keep the fast-moving parts in local stock for quicker turnaround. For discontinued or non-visible components, we use premium aftermarket parts that fit correctly and don’t compromise the job. We only recommend full replacement when the CWS element is beyond repair or when a retrofit for energy efficiency pays back faster than repeated repairs will.
See the difference
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AfterCWS Service Pricing in El Cajon

Here’s where we stand on cost. We don’t hand you a vague ballpark; we price the job in writing before anything begins.
| Service | Price Range |
|---|---|
| Window Replacement (each CWS unit) | $4,500 – $15,000 |
| Impact Window Installation (CWS frames) | $8,000 – $25,000 |
| Cabinet Installation & Refacing (CWS boxes) | $4,000 – $13,000 |
| Kitchen Design & Layout (with CWS millwork) | $14,000 – $45,000 |
What drives the number up or down is the scope: whether we’re repairing one window versus reframing five, whether the original CWS millwork can be salvaged, and whether the job needs to meet current Title 24 standards. A free estimate includes a walkthrough, measurements, and a written line-item quote. Call (619) 604-9624 and we’ll give you the number before any work starts.
Serving El Cajon, CA - Our Local Coverage Area
We’re based in the El Cajon 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 – CWS Construction in El Cajon
Can you repair my original CWS wood windows, or do I have to replace them for Title 24 compliance in El Cajon?
It depends on the condition of the sashes and the glass. If the sashes are sound and the unit can be retrofitted with dual-pane low-E glass that meets current U-factor and SHGC requirements, we repair. If the frames are warped or the original single-pane glass can’t be upgraded economically, we replace. We’ll show you the numbers and let you decide. Call (619) 604-9624 for a free assessment.
What causes my CWS exterior doors to stick in the summer in El Cajon?
Heat expansion and dried-out wood. In this valley, summer temperatures over 90°F cause the stiles and rails to expand, and the low humidity draws moisture out of the wood. The door binds against the jamb. We can shave and reseal what’s salvageable, or rehang the door with proper flashing if water damage is the underlying cause.
Do you use genuine CWS parts for closet system repairs, or are aftermarket parts acceptable?
We use genuine CWS hardware and millwork where it’s visible or structural. For non-visible components like internal brackets or discontinued hardware, we source premium aftermarket parts that match the fit. The goal is a repair that holds and looks right, without paying a premium for a logo you’ll never see.
How do you handle CWS windows when we’re doing our Bathroom Remodeling in El Cajon or a full kitchen remodel in an older El Cajon home?
We look at the whole wall opening, not just the window. If original CWS windows are single-pane and failing Title 24, we reframe and install dual-pane low-E units while the walls are open. It’s cheaper than coming back later, and it keeps your remodel from leaving an efficiency gap in the middle of the room.
Can you reface my CWS kitchen cabinets instead of replacing them to save money in El Cajon?
In most cases, yes. If the cabinet boxes are structurally sound, we can reface with new doors, drawer fronts, and veneers, and add new hardware. The savings usually fall between $4,000 and $13,000 depending on the kitchen size. Call (619) 604-9624 and we’ll give you a written line-item price, not a ballpark.
Service Areas Near El Cajon
We serve El Cajon and the surrounding cities, including La Mesa, Santee, San Diego, and Chula Vista. If you’re in one of those areas and need CWS work done, we cover it. For specifics outside El Cajon, see our El Cajon service area page, CWS service in San Diego, or CWS service in Chula Vista.
Book Your CWS Service in El Cajon Today
Call (619) 604-9624 to schedule your free estimate. We’ll walk the job, take measurements, and give you a written price and a written guarantee before anything starts. That’s how we work in El Cajon, and it’s how we’ve worked since 2004.
Written by Trevor Nash, Owner at Penhallow Remodeling San Diego, serving El Cajon and the surrounding San Diego region.












