Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable Windows & Doors Across Kentfield
Window and door replacement in Kentfield is not a dry-wall job with a trim kit. It is storm, wind, and wildfire compliance work, and if the paperwork is wrong, you find out at final inspection or, worse, during an insurance claim. Barrett & Sons Construction handles the full scope: Marin County permits, WUI-compliant exterior trim, impact-rated glass and frames matched to your hillside exposure, and an inspection sign-off before we consider the job done. Call (877) 610-1318 and you’ll reach a live person who can talk through what your specific street above Sir Francis Drake Boulevard actually requires.
Why Barrett & Sons Construction Is Kentfield’s Preferred Windows & Doors Company
Kentfield homeowners have spent 29 years watching other contractors quote one thing and bill another. Tom Barrett has spent 29 years writing change orders before the first nail moves. That distinction matters on a sloped lot where a window replacement can turn into subfloor repair the moment the old frame comes out and you see what 55 inches of annual rainfall did behind the flashing. Our crews know the failure pattern before they open the wall, because we have opened hundreds of them on the hillside streets between Kent Woodlands and the College of Marin edges.
We carry premium product lines you can look up, including Andersen and Marvin for windows and doors, and we stock more of the common replacement parts for Kentfield homes than most shops in central Marin. A live person answers our phone 24 hours a day, seven days a week. And the 90-Day Done Right Promise is written on every contract: if it’s not done right, one call brings Tom back.
Serving Kentfield is not a drive-by for us. The rain-soaked hillside parcels, the stepped foundations, the Marin County Fire WUI review layer: that is our daily work. We are not a pickup crew from another county learning your local requirements on your dime.
Our Windows & Doors Services in Kentfield
We handle the full Windows & Doors scope in Kentfield, from a single fogged picture window to a full-home impact-rated replacement set. Here is where we focus most of our time on the hillside streets here.
Impact Windows & Doors
Kentfield sits where marine air stalls against the Marin hills and releases, dropping 50 to 60 inches of rain a year, roughly triple what San Francisco gets a few miles over the ridge. Windows on the hill-edge parcels also have to satisfy Marin County Fire’s WUI requirements for ember-resistant venting and fire-resistant cladding at the window and door perimeter. Impact-rated products from Milgard, Andersen, and Marvin do both jobs when sized and flashed correctly. A typical impact window installation in Kentfield runs $8,000-$25,000 depending on opening count and frame condition.

Window Replacement
Most Kentfield window replacements are full-frame jobs, not sash-only retrofits. The reason is simple: 1960s and 1970s wood frames that soaked up decades of orographic rain are usually rotted behind the trim, and you cannot see that until the old frame is out. A full-frame replacement in Kentfield runs $4,500-$15,000, and the wide range is driven by how much framing gets rebuilt once the rot is exposed.

Custom Windows & Doors
Mid-century Kentfield homes do not have stock-sized openings. Nothing at the big-box store fits the measurements we pull off a 1950s post-and-pier house above the flood channels. We order custom-built units and verify every rough opening before the order is placed, because a custom window ordered 1/4 inch wrong is a six-week mistake no one wants on a rainy hillside. Custom quotes include site measurements, permit drawings, and written change orders before any scope moves.

Door Installation
Entry doors on Kentfield’s south-facing slopes take wind-driven rain from the southeast, and we routinely replace non-flanged doors that leaked at the top track and rotted the subfloor framing underneath. Our door installations include pan flashing, sill pan sealing, and WUI-compliant trim where the parcel requires it. The permit inspector works for you, not for me, and we make sure the work is ready before he arrives.

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.
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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 Kentfield
We install and service Andersen and Marvin windows, Milgard impact-rated lines, and quality door products we are willing to put our name on. On the hardscape side we carry Belgard and Techo-Bloc for Kentfield Driveway & Pavers projects, because windows and doors do not live in a vacuum, and many Kentfield projects start with drainage and walkway work. We stock common replacement hardware and weatherstripping for Kentfield homes, so we can often repair a sticking or leaking door in the same visit rather than ordering parts from a warehouse and making you wait three weeks.
Common Windows & Doors Problems We See in Kentfield Homes
- Rotted wood frames from chronic moisture. The orographic lift effect against the Marin hills means Kentfield gets dramatically more rain than Larkspur or Corte Madera. The result is window frames and door thresholds that look fine from the outside but are soft from the inside, which is why most of our replacements here are full-frame, not retrofits.
- Fogged glass on 1950s through 1970s units. Housing stock in Kentfield skews mid-century custom and semi-custom. Seal failures are common once the original glazing hits 40 to 60 years, and a fogged sash is usually the first sign the whole frame is due.
- Sliding patio doors that flex under wind-driven rain. Non-impact sliders on the southeast sides of Kentfield homes leak at the head track because the door stiles flex under storm gusts. We replace them with impact-rated sliders that carry a documented wind-load rating, which also changes how an insurance underwriter views the claim.
- WUI flagging at final inspection. Hill-edge parcels in Kentfield get reviewed against Marin County Fire’s WUI standards, and if the window or door perimeter lacks ember-resistant venting or compliant cladding, the inspector flags it. We handle that coordination up front so the inspection is the confirmation, not the surprise.
Pricing for Windows & Doors in Kentfield, CA
Here are the actual market ranges we are quoting in Kentfield right now. These are not bait numbers.
| Service | Typical Kentfield Range |
|---|---|
| Impact Window Installation | $8,000-$25,000 |
| Window Replacement | $4,500-$15,000 |
| Full Door Replacement | $2,000-$6,500 per opening |
| Sliding Patio Door (Impact-Rated) | $3,500-$9,000 |
What moves the number is opening count, frame condition, height of access (hillside jobs with steep driveways cost more), and whether the parcel sits in a WUI zone requiring fire-rated cladding and ember-resistant venting. If you have a written estimate from another contractor, bring it in for a Free Second Opinion. If your repair is over $200, ask about the $40 Off Any Repair offer. Seniors and veterans take 10% off, every time. Call (877) 610-1318 for a free estimate. No trip charge inside the county.
We Also Serve Cities Near Kentfield
We work across central Marin, from Windows & Doors in Kentfield throughout Larkspur, San Anselmo, Corte Madera, and Fairfax. The storm and WUI requirements shift street by street once you leave the hill-edge parcels, so we quote each job against its actual parcel, not a countywide guess.
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 - Windows & Doors in Kentfield
Replacement windows in Kentfield should meet at minimum the design wind speed for the parcel’s exposure category, and on slope-facing openings we recommend impact-rated units from Milgard or Andersen that carry a documented rating, typically adding 20 to 40 percent to material cost. The cost difference comes from heavier laminated glass, reinforced frame joinery, and more aggressive flashing. Call (877) 610-1318 for an exact quote against your parcel, not a generic regional number.
Yes. Kentfield is unincorporated, so all permits run through Marin County’s building department, and a sliding glass door replacement that changes the opening or the structural connection requires a permit and inspection. The permit inspector works for you, not for me, and the inspection protects both of us. We handle the permit, the drawings, and the sign-off on every eligible job.
On Kentfield’s hill-edge parcels, Marin County Fire enforces WUI requirements that include ember-resistant venting and fire-resistant cladding at window and door perimeters, which means certain vented soffit and trim products are not allowed. This adds material cost and a review step that flatland projects in Novato or central San Rafael do not face. A compliant Kentfield quote includes those materials and that coordination; a cheap one leaves them out and hopes the inspector misses it. Call (877) 610-1318 to have us check your parcel against the WUI map before you spend anything.
A compliant quote includes the Marin County permit application and fees, WUI-compliant trim and venting where required, documented wind-load and water-resistance ratings for every unit, written change orders for any scope change, and an inspection sign-off. A cheap quote often includes none of the paperwork, uses non-rated glass, and skips the flashing that keeps a Kentfield winter from rotting the framing. One missed flashing detail is the difference between a 15-year window and a five-year one. We write every scope, every allowance, and every price change on paper before work happens.
Documented compliance changes how the underwriter processes the claim. On a 1960s post-and-pier home above Sir Francis Drake Boulevard, we replaced failed aluminum sliders with impact-rated Milgard windows and a custom fiberglass entry door as part of a Kentfield Kitchen Remodeling and exterior restoration after chronic moisture intrusion rotted the subfloor framing at the threshold. The homeowner’s insurance underwriter later confirmed the documented wind-load and water-resistance ratings reduced their renewal premium. If your window or door fails during a storm and the install records do not show a rating, the insurer has an easy reason to limit payment. We keep your documentation in order, and copies go to you.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Kentfield since 1998.







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