Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable Windows & Doors Across Tamalpais Valley
Window replacement in Tamalpais Valley typically runs $4,500-$15,000 for a full home, while a single impact window starts around $1,000-$1,800 installed. Most jobs take two to three days once materials land. If you’re in the 94941 and your wooden sashes are swelling shut after every wet Mount Tam winter, or you’re tired of hearing Shoreline Highway traffic through single-pane glass, call us at (877) 610-1318. Barrett & Sons Construction has been owner-operated since 1998, and Tom Barrett or one of his sons will personally walk your home before any number goes in writing.
Why Barrett & Sons Construction Is Tamalpais Valley’s Preferred Windows & Doors Company
Tamalpais Valley sits in unincorporated Marin County, which means permits go through the county’s Community Development Agency, not a city hall down the street. That process is slower and more particular than what your friends in Mill Valley deal with. We know it. We’ve pulled permits for window and door replacements here enough times to know which forms the county wants, when the inspector will actually show up, and how to keep the job moving while the paperwork clears. You won’t get a blank stare when you mention CBC Chapter 7A ignition-resistant requirements because we’ve been building to that standard in the 94941 for years.
Our reputation in Tamalpais Valley is built on the small stuff: the crew shows up with the right trim, the old windows leave in our truck not your green bin, and the final bill matches the written estimate. That’s the Barrett & Sons way. Tom’s name is on the truck and on the contract, and his phone is answered by a live person twenty-four hours a day. Read through our reviews and you’ll notice a pattern: Tamalpais Valley homeowners keep mentioning that we did what we said we’d do, for the price we said, on the day we said. A low bar until you’ve been burned by the national outfits.
Because we serve Tamalpais Valley regularly, we can schedule in-window measurements and installation without making you burn a vacation day waiting for a truck that never shows. And if anything’s off after the job, one call brings Tom back. That’s the written 90-Day Done Right Promise on every contract.
Our Windows & Doors Services in Tamalpais Valley
Window Installation
New window installation in Tamalpais Valley has to account for the fog. Homes along the flat corridor near Shoreline Highway get persistent marine fog mornings from June through August, which means wood frames without proper flashing rot faster here than they do twenty minutes east. We install Andersen and Marvin windows with full pan flashing and sill sealing that holds up to the moisture. Every window job includes the permit, the inspection, and a written change order if anything shifts. Nothing verbal, nothing vague.

Door Installation
Front doors in Tamalpais Valley take a beating from wind-driven rain that slams the west-facing sides of houses during winter storms. We install solid-core and fiberglass doors with proper weatherstripping, threshold sealing, and pre-hung frames that don’t warp when the wet season runs long. If you’re replacing an old 1950s or 1960s door on a modest post-war home near the flats, we’ll check the rough opening for rot before we order anything. Replacing a rotted jamb on install day costs more than catching it on day one.

Window Replacement
The 1950s and 1960s wood-frame houses that dominate the Tam Valley corridor often still have their original single-pane windows. Those homes were built before double-pane glass was standard, and they leak conditioned air all year. Replacement in those houses usually means upgrading to dual-pane low-E glass, which makes an immediate difference on the heating bill and cuts down Shoreline Highway noise. In the canyon homes up toward Mount Tam, we routinely see 1970s and 1980s aluminum sliders that have lost their seals and fogged between the panes. We replace those too, with frames rated for the wind exposure those lots get.

Impact Windows & Doors
Living at the base of Mount Tamalpais inside a Cal Fire-designated Very High Fire Hazard Severity Zone means impact windows aren’t just about wind. They’re part of a fire-hardening strategy. Impact-rated glass and frames meet the ignition-resistant standards under CBC Chapter 7A, which the county enforces on remodels and additions. Impact window installation in Tamalpais Valley runs $8,000-$25,000 depending on how many openings and what the existing frames look like. We’ll show you the Chapter 7A compliance path before we quote, not after.
If you’re adding a slider to a canyon lot or replacing an old French door on a hillside home, our Windows & Doors team handles the full scope, from structural confirmation to final inspection. We also handle related outdoor work - after a big window and door replacement, many homeowners ask about refreshing their entry and yard. We do that too: Fence Installation in Tamalpais Valley and Driveway & Pavers in Tamalpais Valley are both done by our own crews, not subcontractors we’ll never see again.

What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Tamalpais Valley
We install Andersen and Marvin windows, plus GAF roofing underlayments where window flashing ties into the roof line. Most Tamalpais Valley window and door jobs don’t require parts delivery delays because we order from Bay Area distributors who stock what our local homes need. Common sizes for 1950s ranch windows and 1970s canyon sliders are usually available without a special order. If your existing hardware is from a brand we don’t carry, we’ll find the replacement part rather than push you into an unnecessary full swap.
Common Windows & Doors Problems We See in Tamalpais Valley Homes
- Fog-rotted wood sashes on the flat corridor: The persistent marine fog that sits along Shoreline Highway from spring through early fall keeps wood frames damp for hours each morning. Over thirty years, that moisture rots sill corners and makes sashes stick or refuse to lock. We see it in every 1950s house on the flats.
- Wind-driven rain pushing through west-facing doors: Winter storms off the Pacific hit Mount Tamalpais first, and the orographic lift wrings out far more rain here than in San Francisco or the East Bay. West-facing entry doors without a storm door or proper threshold seal leak during heavy weather. We replace the threshold, the door, and the flashing as one sealed system.
- Failed seals in 1980s aluminum windows in the canyons: The hillside homes above the valley floor, built from the 1960s through the 1980s, often have aluminum-framed sliders and fixed windows that have lost their thermal seals. Fogged glass, condensation between panes, and drafty corners are the tell. Replacement is the only real fix.
- Defensible-space permitting conflicts: Grading or trenching too close to the wildland interface triggers a separate county review that can block a door or window foundation repair for months. We check the defensible-space map before we propose any exterior work, because we’d rather find the conflict before you’ve paid for drawings.
Pricing for Windows & Doors in Tamalpais Valley, CA
What you’ll pay here comes down to three things: the age and framing of your home, the window style, and whether county fire-hardening rules require impact-rated glass. A straightforward window replacement on a flat-lot 1950s home runs $4,500-$15,000 depending on the number of windows. Impact windows and doors in the fire hazard zone run higher, typically $8,000-$25,000 for a full home. Door installation alone, including a new pre-hung unit and weatherproofing, runs $1,200-$4,000 per door depending on material and width. We also honor our standing offers: $40 off any repair over $200, a free second opinion on any written estimate, no trip charge inside the county, and a permanent 10% Senior & Veteran discount.
Every price we give in Tamalpais Valley is written down with the scope, the allowances, and the change-order terms. If anything changes once we open the wall, you’ll get a written change order before work proceeds. Call (877) 610-1318 for a free, no-pressure estimate. Tom or one of his sons will come out, take measurements, and give you a number that means something.
We Also Serve Cities Near Tamalpais Valley
Barrett & Sons Construction serves Tamalpais Valley and the surrounding Marin communities including Tamalpais-Homestead Valley, Mill Valley, Corte Madera, and Larkspur. If you’re just over the ridge or down the highway, we’re close. Dispatch and scheduling are coordinated from the brand’s San Francisco Bay Area office, and crews serve Tamalpais Valley locally.
Serving Tamalpais Valley, CA - Our Local Coverage Area
We’re based in the Tamalpais Valley 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 - Windows & Doors in Tamalpais Valley
We can usually schedule an estimate in Tamalpais Valley within one to two business days, and installation starts once materials arrive, typically two to three weeks out. Call (877) 610-1318 and a live person will set the appointment.
Yes. We work everywhere in the 94941, from the flats along Shoreline Highway up into the hillside canyons on the lower slopes of Mount Tamalpais. Steep lots and post-and-pier foundations are familiar territory for our crews.
Window replacement in Tamalpais Valley runs $4,500-$15,000, and impact windows run $8,000-$25,000. The reason the range runs wider than in nearby Mill Valley or Larkspur is the county’s extra fire-hardening and environmental review requirements, which can add engineering and inspection steps that incorporated cities don’t always demand. Call (877) 610-1318 and we’ll break down exactly what applies to your house.
Yes. Every eligible job includes permits pulled and inspections signed. The Marin County Community Development Agency process is slow and particular, and we handle the paperwork so you don’t have to. The permit inspector works for you, not for me - that’s why I like him.
Every job includes the written 90-Day Done Right Promise. If something isn’t right after the install, one call brings Tom back to make it right. Materials also carry their manufacturer warranties, and we’ll register those on your behalf. Call (877) 610-1318 for a free estimate and we’ll put everything in writing.
Written by Tom Barrett, Owner at Barrett & Sons Construction, founded 1998 and serving Marin County communities including Tamalpais Valley.







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