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CWS Construction in Calabasas, CA | Mason Remodeling Co Thousand Oaks
We provide independent CWS construction service across Calabasas, and the one thing that sets our work here apart is simple: we know how CWS homes fail in this specific hillside environment. Calabasas is not the Valley. The soil moves, the Santa Anas hammer ridgelines, and the city’s view-preservation rules change what you’re allowed to rebuild. If you own a CWS-built home and something’s shifting, cracking, or leaking, call (805) 309-3386 and we’ll tell you what’s actually wrong.
Why Calabasas Residents Choose Us for CWS Service

Our crews have worked on CWS-built additions and remodels across the Santa Monica Mountains corridor for years, from the guard-gated estates of The Oaks to older custom homes in Mulwood. That’s not a sales line. It means we’ve opened enough CWS walls in Calabasas to know exactly how their construction details age under fire, seismic, and soil conditions that flatland contractors never see.
Isaac Pruett grew up in Los Angeles and learned the trade at Los Angeles Trade-Technical College before putting that foundation to work on real job sites across the region. He’s been keeping projects on schedule and on budget around Thousand Oaks for years, from whole-home renovations near Lang Ranch to Calabasas Bathroom Remodeling and smaller kitchen and bath builds. When we send a crew to Calabasas, you’ll know who’s coming: every technician is background-checked, identity-verified, uniformed, and introduced by name and photo before they reach your door. That’s the Threshold Standard our company has held since 2004.
We’re an independent CWS service provider. We are not manufacturer-affiliated or authorized. That distinction matters because we recommend what’s right for your house, not what a corporate warranty department prefers.
Call (805) 309-3386 and you’ll get a live person, not a phone tree. Tell me what you need done. We’ll tell you what it costs and how long it takes, then we’ll do exactly that.
Styles & brands we work with







Common CWS Construction Problems We Solve in Calabasas
Here’s what we see most often on CWS homes in Calabasas, and why it happens here specifically:
- Stucco cracking at hillside shear-wall junctions. CWS stucco exteriors develop hairline cracks after seismic shifts. In Calabasas, where hillside lots sit on moving soil and the city’s seismic retrofit codes demand reinforced shear walls, these cracks appear faster and run deeper than they do in the Valley. We handle them with elastomeric sealing and mesh reinforcement, not just cosmetic caulk.
- Deck ledger rot on CWS attached decks and balconies. Calabasas winter rains come hard and fast on hillside exposures. When original CWS flashing was installed without enough slope, water pools against the ledger board and rots it. We’ve replaced rotten ledgers on decks overlooking Las Virgenes Canyon where the board crumbled in our hands.
- Compromised lateral bracing in view-preservation additions. CWS designed many Mountain View Estates additions to sit low so neighbors keep their sightlines. What that often means is tight crawlspace framing with limited bracing. We’ve opened walls on 2000s-era CWS remodels and found the lateral system far weaker than plan. This one hides until you remodel.
- Tile roof failures at ridge transitions. CWS tile roofs on custom homes in The Oaks show underlayment breakdown and broken tile at ridge lines after prolonged sun and Santa Ana wind cycles. The ridge is the first thing to go because wind hits it from every angle up there.
- Sticky sliding doors that signal shear movement. Up in Mountain View Estates, our crew opened a 2008 CWS Signature Hillside addition for a kitchen remodel and found the original shear wall on the downslope side had a 3/8-inch horizontal crack hidden behind custom cabinets. We installed new hold-down anchors and OSB shear panels, then reframed the kitchen so the island didn’t add load to that wall. The homeowner had noticed a sticky sliding door for years. After our fix, it shuts flush.
CWS Service in Calabasas: What Local Conditions Mean for Your Equipment
Calabasas requires hillside construction permits to include a geotechnical report and often a view-preservation analysis. That’s a regulation a General Contractor - Calabasas understands intimately, unlike flatland firms, and it changes every CWS remodel or repair we do here. A kitchen remodel on a Calabasas hillside lot often can’t expand the original permitted footprint without triggering a full geotech re-evaluation, which means redesigning the project to stay inside the existing envelope. We’ve done this repeatedly on CWS Signature Hillside Series homes in neighborhoods like Mountain View Estates and along Mulholland Highway, where the downslope side of the house has different load requirements than the uphill side. If your CWS addition was built to preserve a neighbor’s mountain view, you’re working inside those same limits now. We plan around them from day one so your permit doesn’t stall in review for six months.
CWS Models & Products We Service in Calabasas
We work on all major CWS construction packages found across Calabasas, including the CWS Signature Hillside Series, the CWS View Preservation Addition, the CWS Stucco Luxury Package, and CWS Tile Roof Integration systems. When a CWS home needs structural connectors, shear-wall hardware, or stucco lath, we source genuine CWS-specified parts from OEM suppliers because safety and warranty concerns dictate it. For trim, flashing, and tile, we use premium aftermarket equivalents that match or exceed original spec. We replace rather than patch any CWS structural member that has lost more than 20% of its designed load capacity due to rot, rust, or seismic deformation. Our local parts access keeps Calabasas turnaround times short, especially for tile roof repairs and stucco remediation before the next rain cycle.
If you’re pricing a larger project, our full CWS sales & service covers everything from initial inspection to final walkthrough, with a written price delivered before any work starts.
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AfterCWS Service Pricing in Calabasas

Here’s what CWS-related work typically costs in Calabasas. These ranges assume standard access and conditions. Hillside lots with difficult access, geotech complications, or view-preservation constraints run toward the higher end.
| CWS Service | Typical Calabasas Price Range |
|---|---|
| Full Kitchen Remodeling | $14,000 – $45,000 |
| Tile Roofing | $8,000 – $20,000 |
| Roof Repair | $400 – $1,800 |
Every estimate we give is written and line-itemed before any tool is unpacked. No verbal numbers that grow on the final invoice. No change orders you didn’t approve in writing. If you want an exact number for your CWS home in Calabasas, call (805) 309-3386 and we’ll schedule a free estimate.
Serving Calabasas, CA - Our Local Coverage Area
We’re based in the Calabasas 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 Calabasas
Yes. CWS stucco homes in Calabasas typically develop hairline diagonal cracks at the corners of window and door openings on the downslope side of the house, where shear-wall forces concentrate during seismic shifts. These are different from the vertical settlement cracks you see in flatland homes. If you’re seeing diagonal cracks, call (805) 309-3386 for an inspection before the next rain gets behind the stucco.
Yes, as long as the remodel stays within the original permitted footprint. Calabasas enforces view-preservation analysis on any addition or structural change, but interior remodels that don’t expand the envelope typically avoid triggering a full geotech re-evaluation. We design CWS kitchen remodels in view-preservation zones to work within your existing walls. Call (805) 309-3386 and we’ll tell you what your lot allows.
Because Santa Ana winds hit Calabasas ridgelines at higher sustained speeds than in the Valley below, and the hot, dry summers degrade underlayment faster than coastal homes experience. The ridge transition is where wind pressure and sun exposure concentrate, so CWS tile roofs in neighborhoods like The Oaks show failure there first. Ridge repair runs $600 – $2,500 depending on tile type and damage extent.
We use genuine CWS-specified structural connectors and shear-wall hardware when safety or warranty concerns dictate, but for flashing we use premium aftermarket materials that exceed original spec, especially for deck ledgers on hillside exposures. Original CWS flashing on many Calabasas decks was installed without enough slope for our winter rain intensity, which is exactly why the ledger rotted. We correct the slope, not replicate the flaw.
In most cases, yes. If the existing CWS tile or asphalt underlayment is intact, we can install a Class A fire-rated retrofit system over the current roof, including fire-resistant ridge caps and ember-resistant vent screening, without tearing everything off. This is common in Calabasas after the Woolsey fire. Call (805) 309-3386 to have us assess your roof’s current fire rating and what an upgrade would cost.
Service Areas Near Calabasas
From our Thousand Oaks base, we serve Calabasas and surrounding communities including Calabasas service area coverage, through CWS service in West Hills, CWS service in Thousand Oaks, plus Oak Park, Malibu, and Topanga. If your CWS home sits on a hillside anywhere in this corridor, we’re close enough to be on site fast.
Book Your CWS Service in Calabasas Today
Need a CWS repair, remodel, or full roof replacement in Calabasas? Call (805) 309-3386 now. A live person answers, day or night. We’ll schedule your free estimate, send a background-checked crew with name and photo in advance, and put every price in writing before work begins. Calabasas hillside rules are complicated. We’ve already navigated them.











