Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Window Replacement Across Kentfield
Window replacement in Kentfield runs $900 to $2,800 per opening for most single-family homes, with full-frame work on older Craftsman or Tudor homes typically landing between $1,800 and $3,400 per window once you factor in custom millwork, historic-profile matching, and county-mandated finishes. The job usually takes one to two days on site, but custom wood windows often have a six-to-twelve-week lead time before the truck ever shows up. TruePane has been doing this work in the Ross Valley long enough to know that on a shaded street off Laurel Grove Avenue, the rot you cannot see is usually worse than the fogged glass you can. Call (888) 635-0804 for a free, written estimate and we will tell you straight what your Kentfield home actually needs, not what a sales script says to push.
Kentfield is not Larkspur and it is not San Anselmo. The tree canopy, the unincorporated county permitting, the era of the housing stock. All of it changes what a correct window replacement looks like here, and a crew that treats Kentfield like any other Marin town will miss something. We do not miss it because we have pulled too many rotten sashes out of too many Craftsman jambs on these exact streets to be surprised anymore.
Why TruePane Windows & Doors Is Kentfield’s Preferred Window Replacement Company
We have been at this since 2008 as a company rooted in one family’s craft tradition, founded by second-generation glazier Dale Kessler. The rule on Dale’s whiteboard has not changed since 2008 when TruePane opened its doors: if the pane is not true, the job is not done. That standard carries into every estimate we write in Kentfield.
Kentfield homeowners have a particular set of problems, and we have seen all of them. Redwood duff packed against sill pans. Double-hungs fogged by constant shade. Design review rejections because someone ordered a standard vinyl insert with a simulated lite pattern the county would never approve. The work here is not a commodity sale. It is a problem you solve with a crew that understands unincorporated Marin County, not a franchise pitch.
Every TruePane technician is background-checked and uniformed. Every opening gets measured twice. Every quote puts manufacturer lines side by side on paper so you can see exactly what you are buying. And before our truck leaves your driveway, both manufacturer warranty layers are registered in writing, durations stated, under The Keystone Standard. That is not a slogan. It is the promise Dale built the company on, and we back it with a Done Right Promise: if it is not done right, we make it right. No paperwork fights, no arguing.
A live person answers our phone 24 hours a day, 7 days a week. Not a voicemail tree. Not a callback form. If something goes wrong with a window we installed on a Kentfield hillside, you call and a human picks up. That matters when you have lived in your house for twenty-five years and intend to stay twenty-five more.
Our Window Replacement Services in Kentfield
Full Frame Replacement
Full-frame replacement is the correct fix when the rot has moved past the sash and into the jamb, sill, or king studs, which happens more often in Kentfield than almost anywhere else in Marin. The drip-moisture off mature redwood and oak canopy keeps wood window frames in a constant wet-dry cycle, and by the time you see peeling paint or a sash that will not close, the framing underneath is often already soft. We tear out the entire old unit down to the rough opening, repair or sister any damaged framing, flash the opening properly with modern tape and pan systems, and set a new window that matches the home’s original profile. On a Craftsman on Laurel Grove Avenue, our crew pulled a pair of original double-hung sashes where fog between the panes had signaled a failed insulated glass unit. The redwood sills had wicked moisture up into the jamb, so we did a full-frame replacement with Marvin wood windows specifying low-E glass with argon fill and a true-divided lite pattern to satisfy county design review. Lead time on the custom millwork was nine weeks, so we locked the price in writing before ordering and scheduled a second trip to install the new flashing tape and sashes.

Insert Window Replacement
Insert replacement keeps the existing frame and trim in place and drops a new window unit inside it. In Kentfield, an insert only works when the surrounding wood is still sound. On dry, south-facing elevations or on homes where the sill has been maintained, an insert can be a smart way to get new glass and better seals without the cost of full-frame demolition. But we tell you honestly when an insert will not hold because the frame is already compromised. On a shaded street off Sir Francis Drake Boulevard, an insert over a rotten sill just hides the problem for three years and makes it worse underneath.

Energy-Efficient Upgrade
Kentfield’s Ross Valley floor collects heavy morning condensation and radiated moisture from the tree canopy, and that moisture finds every weak point in an old window’s seal. An energy-efficient upgrade here means more than swapping clear glass for low-E. It means matching glass coatings to the home’s orientation, choosing argon or krypton fill for shaded north-facing windows, and selecting a frame material that will not swell and bind in the damp. For hillside homes facing California’s Very High Fire Hazard Severity Zone requirements, it can also mean fire-rated glazing and clad-wood or steel assemblies that meet county and state code. We walk every Kentfield customer through those choices in plain English, on paper, side by side, so you understand what you are paying for and why.

Storm Window Replacement
Some older Kentfield homes still have exterior storm windows or triple-track aluminum units installed forty or fifty years ago. On a 1930s Colonial Revival, replacing those storms with modern interior or exterior storms that seal tightly can preserve the historic single-pane look while cutting drafts and condensation. We also replace damaged storm sashes on homes where the original windows are worth keeping. Most storm window work in Kentfield runs $350 to $750 per opening depending on size and material, and we are usually able to complete it in one visit.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Kentfield
TruePane is an authorized installer for more than a dozen manufacturer lines, including, PGT, CGI, and ES Windows. For Kentfield specifically, we specify a lot of Marvin and Andersen wood windows because they offer the true-divided and simulated-divided lite patterns the county wants to see on historic properties. We also work with Ply Gem, PGT, and CGI when the job calls for impact-rated or fire-rated glazing on hillside lots. Because we are local to the Ross Valley, we carry or can quickly source the common parts and hardware Kentfield homes need, which means less waiting on a repair and fewer return trips.
Common Window Replacement Problems We See in Kentfield Homes
- Wood jamb rot hidden behind intact-looking sills. Mature redwood and oak canopy drips moisture onto window frames for months at a time, and redwood duff packs against the sill pan holding it like a sponge. Homeowners on the wooded upslope streets often discover the rot has wicked up into the king studs before any window failure is visible from inside.
- Fogged insulated glass units from wet-dry cycling, not just age. Kentfield gets less direct coastal fog than Sausalito, but heavy morning condensation on the valley floor puts sustained moisture stress on seals. We have pulled failed units from windows installed less than a decade ago because the original seal never got a chance to dry.
- County design-review rejection of vinyl and fiberglass units. Because Kentfield is unincorporated Marin County, replacement windows are subject to the County’s design-review process. Standard vinyl inserts with non-sympathetic simulated divided lites get rejected routinely. We know what profiles and finishes will pass before you spend money on the wrong window.
- Binding sashes and doors in July. The wood-framed originals on 1920s to 1960s Kentfield homes swell with the valley’s seasonal moisture and then bind when the dry heat hits. If your double-hung will not open in summer, the frame has lost its tolerance. Sometimes that is a plane-and-repair job. More often, it is the opening conversation for full-frame replacement.
Pricing for Window Replacement in Kentfield, CA
Here are honest numbers for the Kentfield market, based on the jobs we actually quote in zip code 94914.
| Service | Typical Range per Window (Kentfield) |
|---|---|
| Full frame replacement, wood window with custom millwork | $1,800 - $3,400 |
| Full frame replacement, premium vinyl or fiberglass | $1,200 - $2,200 |
| Insert window replacement, mid-grade vinyl | $900 - $1,500 |
| Insert window replacement, wood or clad-wood | $1,400 - $2,400 |
| Energy-efficient upgrade (glass package, low-E, argon) | $250 - $600 added per window |
| Storm window replacement | $350 - $750 per opening |
The two factors that move Kentfield pricing most are custom millwork lead times and county design-review compliance. If you are replacing windows on a historic-era home, the windows themselves are often made to order and the profile, lite pattern, and finish all get specified before we order. That is why our quotes are fixed in writing at the time you sign. The price does not change once the millwork is ordered, and there are no surprise line items on the bill. Call (888) 635-0804 for a free written estimate on your Kentfield home. We will measure, we will quote, and we will register both warranty layers in writing before the truck leaves your driveway.
We Also Serve Cities Near Kentfield
While this page is about Kentfield specifically, our crews work throughout the Ross Valley and central Marin. We run the same trucks and the same TruePane standard to Window Replacement in Kentfield neighbors in Larkspur, San Anselmo, San Rafael, and Corte Madera. Each of those towns has its own building department, its own design-review quirks, and its own housing stock, so if you are in one of them, ask us what applies to your street. We will tell you straight.
Serving Kentfield, CA - Our Local Coverage Area
We’re based in the Kentfield 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 Kentfield
Generally, no. Because Kentfield is unincorporated Marin County, replacement windows are reviewed by the County’s design-review process, which typically mandates historically sympathetic profiles, lite patterns, and finishes. A standard off-the-shelf vinyl insert with simulated divided lites often fails review. Clad-wood or solid wood windows with true-divided or properly specified simulated-divided lites are the safe route, and we quote those options on paper before you commit. Call (888) 635-0804 and we will tell you what will pass before you spend a dollar.
It is the drip-moisture and the duff. Kentfield’s redwood and oak canopy keeps window frames damp for months, and leaf litter packing against the sill pan traps that moisture against the wood. The result is a sustained wet-dry cycling that breaks down paint films and joinery faster than rain exposure alone. That is why a sill that looks fine from the living room can hide rot that has climbed into the king studs. Full-frame demo is the only way to see it, and we have done enough Kentfield demos to know what we will find before we open the wall.
Yes. We specify Marvin, Andersen, and other wood and clad-wood windows that accept low-E coatings, argon fill, and true-divided lites in the original Craftsman profiles. The county design-review process actually works in your favor here because it pushes toward the same wood window character your home was built with, while the modern glass package delivers the thermal performance you want. On the Laurel Grove Avenue Craftsman we mentioned, the homeowners got Marvin wood double-hungs with low-E glass, argon fill, and true-divided lites. The county approved, the neighbors did not blink, and the house stays warmer in winter and drier in summer. Call (888) 635-0804 to see the same options on paper for your home.
On-site work is usually one to two days for a typical single-family home. But the true schedule driver is lead time on custom millwork. Wood windows specified for Kentfield’s historic-era homes often take six to twelve weeks from order to delivery. That is the honest answer. What we do is lock your price in writing at the time you sign, so the lead time never becomes a reason for the number to move. Then we schedule installation when the windows arrive. Call (888) 635-0804 for a written quote that includes the real timeline, not a salesman’s wish.
Ask about fire-rated glazing, non-combustible or clad-wood frames, and compliance with California’s Very High Fire Hazard Severity Zone standards. Kentfield hillside homes fall under those requirements, and the wrong replacement window can leave you exposed to both fire risk and code violation. We specify PGT, CGI, and other impact- and fire-rated lines where the hillside demands it, and we pull or coordinate the permits so the work is signed off properly. If you are on an upslope street off Murray Avenue or Crown Road, fire-code glass is not optional. Call (888) 635-0804 and we will explain exactly what applies to your lot.
Our Window Replacement crew has been working Kentfield long enough to know what the county will pass, what the canopy will rot, and what a hillside fire inspector will flag. If you want the job measured, quoted, and done right the first time, call (888) 635-0804 for a free estimate. Written quote, both warranty layers registered, and a Done Right Promise on every window we set.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Kentfield and the Ross Valley with years of craft and community commitment.



Before
After
Before
After
Before
After