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Before
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Before
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AfterFast, Reliable Window Replacement Across Larkspur
Window replacement in Larkspur runs from about $850 for a straightforward insert in a standard opening to $3,200 or more for a full frame replacement on a hillside home that needs fire-rated glazing and custom trim work. Most jobs in the 94939 zip code land between $1,200 and $2,400 per window depending on the frame condition, access, and whether the home sits above downtown in the Wildland-Urban Interface zone. We’ve worked Larkspur’s canyon lots and Magnolia Avenue bungalows long enough to know the difference between a clean insert job and a rotted rough sill plate hiding behind caulk and paint. Call (888) 635-0804 for a free estimate and we’ll walk the opening with you before we quote a number.
Why TruePane Windows & Doors Is Larkspur’s Preferred Window Replacement Company
Larkspur homeowners call us because we answer the phone. Not a call center, not a voicemail tree. A live person, any hour, day or night. That matters in a town where a fog-driven seal failure on a Baltimore Canyon window can wait months for the right replacement sash, and a hillside fire-code window can’t be ordered wrong twice.
Dale Kessler founded TruePane in 2008 on a rule he still keeps on the shop whiteboard: if the pane is not true, the job is not done. That standard runs through every window we set in Larkspur, from a single double-hung on a Victorian cottage near downtown to a full exterior wall replacement on a WUI hillside lot. Our crews are background-checked, uniformed, and trained to measure every opening twice before ordering anything. We register both manufacturer warranty layers in writing before the truck pulls out of your driveway. That’s The Keystone Standard, and it’s not a slogan. We put it on paper.
We earn Larkspur’s repeat business the slow way: showing up when we say, keeping the job site clean on tight canyon streets where staging space doesn’t exist, and quoting manufacturer lines side by side so you see exactly what you’re paying for. No surprise line items on the bill. No second appointment left hanging.
Our Window Replacement Services in Larkspur
Full Frame Replacement
Most pre-war Larkspur homes eventually need full frame replacement rather than an insert. The reason is simple: decades of marine fog have worked water into the original wood frames, and by the time the glass fails, the jamb and sill plate are often soft too. Full frame means we pull the entire old window down to the rough opening, inspect the studs and sill plate, rebuild what’s rotted, and set a new unit with new flashing and trim. On hillside lots above downtown, this is also where fire-rated glazing and non-combustible frame requirements get addressed properly, because a WUI inspector will check.
Insert Window Replacement
If the existing frame is square, dry, and structurally sound, an insert window keeps the job faster and less invasive. Inserts fit inside the original frame, preserve interior and exterior trim, and cost less than a full tear-out. In Larkspur’s Baltimore Canyon, we see a lot of original frames that look fine on the surface but crumble when we test them with a pick. We’ll tell you honestly which way to go before you spend a dollar. If the frame can take an insert, we’ll say so. If it can’t, we won’t pad the bill by pretending otherwise.
Storm Window Replacement
Older Larkspur homes often still have exterior storm windows layered over single-pane originals. When the storm unit’s frame bends or its weatherstripping flattens, the draft comes straight through and the heating bill climbs. We replace storm units with modern low-profile options that keep the historic look without the rattle. For homes under historic or streetscape review near Magnolia Avenue, we can match profiles and paint colors so the replacement doesn’t fight the architecture.
Energy-Efficient Upgrade
Larkspur’s canyon shade and persistent damp make energy upgrades more than a comfort question. Fogged seals on an older double-pane erase most of the insulation value right when the winter damp sets in. We install low-E, argon-fill units sized for your specific openings, including custom widths on pre-1940s bungalows that no off-the-shelf window can fit. The energy savings are real, but so is the comfort change: rooms along a north-facing canyon hold heat longer, and condensation on the inside of the glass stops being a morning ritual.
What happens when you call
- 1
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 Larkspur
TruePane is an authorized installer for more than a dozen manufacturer lines, including PGT, CGI, and Ply Gem. We quote them side by side on paper so you can compare glass packages, frame materials, and warranty terms without guesswork. For Larkspur hillside homes under WUI fire code, PGT and CGI both offer impact-rated and fire-rated glazing options that meet state requirements. We keep common parts and hardware stocked for faster turnaround on repairs, but every replacement window is ordered to your specific measurements. Nothing gets pulled off a shelf and forced into an opening that’s been settling for eighty years. Call (888) 635-0804 and ask for a side-by-side quote.
Common Window Replacement Problems We See in Larkspur Homes
- Rotted sills and jambs from canyon fog. Baltimore Canyon’s redwood canopy keeps exterior wood frames damp for days after a storm. By the time a homeowner notices the sash sticking, the sill plate underneath is often soft enough to push a screwdriver through. That turns a simple insert into a full frame replacement, which is why we always inspect the rough opening before quoting.
- Fogged double-pane seals from repeated condensation cycles. Marine moisture and big temperature swings between shaded mornings and afternoon sun stress insulated glass seals. Older double-panes in Larkspur fail sooner than their warranties suggest, leaving a permanent fog between panes that no defogging trick can fix.
- Non-standard rough openings in pre-WWII homes. Craftsman bungalows and Victorian cottages along Magnolia Avenue and the surrounding streets were built before standardized window sizing. Off-the-shelf replacements simply don’t fit without custom trimming or frame modification, which is why online window calculators waste homeowners’ time and money.
- WUI fire-code compliance on hillside lots. Homes above downtown Larkspur fall within California’s Wildland-Urban Interface designation. Window replacements there must meet fire-rated glazing and non-combustible frame requirements that flatland Marin cities don’t face. We pull permits, order compliant units, and schedule the inspection so you don’t get a red tag on a finished job.
Pricing for Window Replacement in Larkspur, CA
Here’s what we see on Larkspur jobs. An insert window on a standard opening runs $850 to $1,600 installed. Full frame replacement runs $1,400 to $3,200 per window depending on access, rot repair, and whether fire-rated glazing is required. A whole-house replacement on a 1920s Craftsman with custom trim matching typically lands between $18,000 and $38,000 all in. Historic window restoration, where the original sash can be saved and rebuilt with new weatherstripping and glass, runs $600 to $1,100 per sash. What moves the price in Larkspur more than anything is what we find when we open the wall. Rotted king studs, punky sill plates, and non-standard rough openings add framing labor before any glass goes in. We give you a written line-item quote after we inspect, not before we see the opening. Estimates are free. Call (888) 635-0804.
| Service | Typical Larkspur Range |
|---|---|
| Insert window (standard opening) | $850 - $1,600 |
| Full frame replacement | $1,400 - $3,200 |
| Historic sash restoration | $600 - $1,100 per sash |
| Whole-house replacement (Craftsman) | $18,000 - $38,000 |
We Also Serve Cities Near Larkspur
We serve Larkspur and the surrounding Marin County communities, including Kentfield, Corte Madera, San Rafael, and Mill Valley. If you’re considering Window Replacement anywhere in Marin, our crews are already working the same canyon weather and the same pre-war housing stock. See our Larkspur page for more on what we do in this specific market.
Serving Larkspur, CA - Our Local Coverage Area
We’re based in the Larkspur 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 - Window Replacement in Larkspur
Yes. Hillside homes above downtown Larkspur fall inside California’s Wildland-Urban Interface fire hazard zone, and replacement windows there must use fire-rated glazing and non-combustible frame materials under state code. Most flatland Marin cities don’t have this requirement. We pull the permit, order compliant units, and handle the inspection with Marin County building staff. Call (888) 635-0804 for a free estimate on a WUI-compliant window.
Larkspur’s older neighborhoods are dense enough that many homes sit close to the property line, and west-side windows on a shared wall can affect the neighbor’s structure during tear-out. Marin County requires party-wall notice so the adjacent owner is informed before work begins. We handle that notice for you as part of the permit package. It’s a paperwork step that costs nothing extra from us but prevents disputes and stop-work orders mid-job. Call (888) 635-0804 if you want us to check whether your Larkspur home falls under the requirement.
Sometimes just the glass, but often the whole sash. A fogged insulated glass unit can be replaced on its own if the frame and sash are structurally sound. In Baltimore Canyon, though, sash rot is common because the redwood canopy keeps frames wet for days after a storm. If the sash is punky or the jamb has softened, replacing only the glass leaves a rotted frame in place and the new unit will fail early. We inspect the sash before quoting. A glass-only replacement in Larkspur runs $350 to $650; a full sash rebuild runs $600 to $1,100. Call (888) 635-0804 and we’ll tell you which one your window actually needs.
Larkspur enforces standard Marin County noise ordinances, and work hours on residential lots are generally limited to daytime weekday hours, with limited Saturday work allowed by permit in some neighborhoods. On a tight canyon lot where homes are stacked close together, we stage tools and materials carefully to minimize sound carry and run fasteners by hand where possible. We also talk to neighbors before work starts on shared walls. That’s the neighborly way to do it, and it keeps jobs moving without complaints to the city. Call (888) 635-0804 and ask about scheduling window replacement around your street’s constraints.
It affects both labor cost and material choice. Original Craftsman trim on Larkspur homes is often thicker and shaped differently than modern off-the-shelf casing, so a replacement window that doesn’t account for it leaves gaps or looks wrong. Matching the profile means either salvaging original trim or milling new pieces to match, which adds labor hours to the job. We include that in the written quote so there’s no surprise on the final bill. A standard full frame replacement on a Craftsman with original trim runs higher than a plain suburban install because of that trim work. Call (888) 635-0804 and we’ll measure the trim and tell you exactly what’s involved.
Call TruePane Windows & Doors for Your Larkspur Window Replacement
We work on Larkspur’s tightest lots, pull the permits, handle party-wall notice, match the historic trim, and set windows that hold up to canyon fog and WUI fire code. If the pane is not true, the job is not done. If it’s not done right in 90 days, we make it right. No arguing. That’s the promise in writing.
Call (888) 635-0804 today and schedule your free estimate. A live person answers, any hour.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Larkspur and Marin County.