Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Custom Windows & Doors Across Sebastopol
Custom window and door work in Sebastopol is a different animal than what works in Santa Rosa or Petaluma. The fog, the older housing stock, the rural acreage parcels off Bodega Avenue and around the Laguna de Santa Rosa all change how a job is scoped and priced. We’ve been doing this work long enough to know that a Sebastopol house built in 1925 does not behave like a Cotati subdivision home built in 1998. If you need custom shapes, oversized glass, architectural grilles, or a full frame replacement that actually holds up to this climate, call TruePane Windows & Doors at (888) 635-0804. Dale Kessler built this company around a rule that fits Sebastopol perfectly: if the pane is not true, the job is not done.
Why TruePane Windows & Doors Is Sebastopol’s Preferred Custom Windows & Doors Company
We’re not a franchise operation running crews through Sonoma County on a rotation. TruePane has been serving local communities since 2008 through a craft tradition that started with Dale Kessler, a second-generation glazier who founded this company in 2008 because he was tired of watching out-of-true installs and voided warranties get shrugged off. Homeowners in Sebastopol call us because our background-checked, uniformed technicians measure every opening twice, quote manufacturer lines side by side on paper, and register both warranty layers before the truck leaves your driveway. That’s the Keystone Standard and it applies to every job, every time.
We know the difference between a Craftsman bungalow near downtown and a ranch home on former Gravenstein orchard ground. That matters when you’re scoping a project. A house near the Laguna de Santa Rosa floodplain has moisture problems a hillside lot in Windsor will never see. We plan for that before we quote, not after the old frame comes out and the surprises start. Call (888) 635-0804 and a live person answers, any hour, any day.
Our Custom Windows & Doors Services in Sebastopol
Here is what we handle most often in the 95472 ZIP, and how Sebastopol’s conditions shape the work. Our Custom Windows & Doors team brings the same steady approach to each one.
Custom Shape Windows
Arched tops, eyebrow windows, trapezoids, true circles. Older Sebastopol homes have these in abundance, especially the late-Victorian and Craftsman stock near downtown. Getting a custom shape wrong means the frame fights the structure and the seal fails early. We template every opening onsite, not from a drawing, because a 1920s rough opening is rarely square. In this fog belt, we default to full-frame replacement rather than sash-only swaps so the flashing and drainage plane get upgraded along with the glass.

Oversized Glass Panels
On rural acreage parcels off Bodega Avenue and around the western edges of town, homeowners want big glass to bring in the orchard views and preserve light through the gray months. Oversized panels need correct structural support and careful handling. A 96-inch panel on a windy ridgeline or a low parcel near the Laguna floodplain should be set differently. We spec the frame, the glazing, and the moisture management as one system, not three separate decisions.

Architectural Grilles & SDLs
If you’re restoring a Craftsman in Sebastopol, the grille pattern matters. Simulated divided lites that look cheap will show. Authentic SDLs with internal spacer bars keep the historic look while holding up to the condensation that comes with near-daily morning fog. We match existing grille profiles on older homes and help you choose the right finish if you’re replacing all the units at once.

Curtain Wall Systems
Mostly on the mixed-use and commercial storefront work in and around downtown Sebastopol, plus the occasional modern addition on larger rural lots. Curtain wall in a fog-heavy environment needs weep systems and drainage planes that can handle months of moisture. We have installed these on commercial storefronts in Sebastopol where the wrong glazing choice means interior condensation and water staining within the first winter. We spec for local conditions from the start.

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 Sebastopol
We are authorized installers for more than a dozen manufacturer lines, including, PGT, and ES Windows. For Sebastopol’s moisture-heavy climate, we often quote CWS and ES Windows for their thermal performance and frame durability, and Andersen 400 Series for Craftsman replacement work where the wood interior look matters. We’ll put quotes from two or three manufacturers side by side on paper so you see exactly what you’re buying, including warranty durations written out. No verbal assurances, no fine print that covers neither side.
Trusted Brands We Service in Sebastopol
We’re authorized installers for more than a dozen window and door manufacturers, and we stock the parts and hardware Sebastopol homeowners need most. For homes in the fog belt with heavy condensation, we often quote ES Windows for their thermally broken aluminum frames, CWS for oversized panels and custom shapes, and ECO Window Systems for impact-rated options on rural properties with more wind exposure. Daly City to the north and Petaluma to the south have their own installers. Sebastopol gets our local crew, not a rotating cast. If the pane is not true, the job is not done, and that is not a line we use lightly.
Common Custom Windows & Doors Problems We See in Sebastopol Homes
- Fog between the panes. That cloudy film means the glazing seal has failed and the argon fill is gone. The insulated glass unit’s efficiency collapses. In Sebastopol, one bad season of sustained fog can kill a seal that was already marginal.
- Doors and sashes binding every fall. Near-daily morning fog swells the wood on older double-hung and entry door frames. A door that closes fine in August sticks by late October. Full-frame replacement with composite or clad materials solves it permanently; sanding and repainting does not.
- Rotted thresholds and sill pans on low parcels. Properties near the Laguna de Santa Rosa floodplain wick groundwater up through the subfloor framing. The visible threshold looks bad; the sill pan underneath is usually worse. You cannot fix this from the outside alone.
- Seal failure on south-facing glass. Sebastopol gets long, low winter sun that heats glass unevenly, then the fog rolls in and cools it fast. That thermal cycling shortens seal life. Upgraded insulated glass units with better edge seals help, but the original frame matters too.
Pricing for Custom Windows & Doors in Sebastopol
Custom window and door work in Sebastopol runs on a different pricing model than off-the-shelf replacements in a newer subdivision. A custom shape window, templated and built to fit an out-of-square 1920s opening, typically runs $900 to $2,400 per unit depending on the frame material and glass package. Oversized glass panels run $2,000 to $5,500 per panel once structural support and handling are in. Architectural grilles and SDLs add $150 to $600 per window depending on profile and finish. Full-frame replacement on a Craftsman with rotted sills runs $1,400 to $3,800 per opening because we replace the flashing and drainage plane, not just the window. We do not give an estimate over the phone without seeing the opening. We do give a written line-item quote after one visit, and that price does not change unless the scope changes and we tell you first. Call (888) 635-0804 to schedule a free estimate.
We Also Serve Cities Near Sebastopol
TruePane serves Sebastopol and the surrounding Sonoma County communities, including Santa Rosa, Rohnert Park, Cotati, and Windsor. If you’re on a rural parcel between them or right in town, the same crew and the same warranty apply. Call (888) 635-0804 and we’ll put you on the schedule.
Serving Sebastopol, CA - Our Local Coverage Area
We’re based in the Sebastopol 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 - Custom Windows & Doors in Sebastopol
Because the fog has gotten into the frame, not just the sash. In Sebastopol’s marine layer, wood rot at the sill, jamb, and exterior trim is the rule, not the exception. A sash swap leaves that rotted frame in place and the new sash will fail faster than the old one. Full-frame replacement lets us replace the flashing, add a drainage plane, and set the new window correctly. It costs more up front and costs less than doing it twice. Call (888) 635-0804 and we’ll show you what your frame actually looks like before you decide.
Your septic tank and leach field setbacks determine where we can put equipment, stage materials, and even set certain window openings for an addition or outbuilding. Well setbacks matter too, especially if you’re adding glass closer to the well or doing any trenching for drainage. We map those before quoting so the price reflects the real access path and not a generic city curb job. On orchard parcels, the old soil can hold more moisture than you would expect, so we also scope subsurface drainage around any door or window near grade. Call (888) 635-0804 and we will come out and look.
Triple-pane with a warm-edge spacer and a low-E coating tuned for coastal-influenced climates is the strongest answer for most Sebastopol homes. The morning fog means condensation on the exterior glass, which is normal and actually a sign the low-E coating is working. The failure happens when the seal breaks and condensation forms between the panes. A high-quality insulated glass unit with a better edge seal, set in a properly flashed frame, handles Sebastopol’s moisture far better than a builder-grade double-pane. For the exact glass package on your home, call (888) 635-0804 for a free estimate.
Yes, and we do this regularly on rural Sebastopol parcels where the shop, studio, or detached ADU needs big glass but the budget is a factor. We will be straight with you: oversized glass on an outbuilding still needs correct structural framing and moisture flashing. We can often spec a more economical frame material, like thermally broken aluminum from ES Windows, to keep the cost down without cutting corners. The price ranges we gave above apply, and we will put the line items on paper before any work starts. Call (888) 635-0804 to talk through your project.
Look for fog or condensation between the panes, visible rot at the sill or bottom corners of the frame, sashes that stick in fall and winter, or door thresholds that feel soft underfoot. If you can press a screwdriver into the wood at the threshold or sill and it sinks, the frame has failed and the moisture has been winning for a while. In Sebastopol, those signs show up earlier than in Santa Rosa or Windsor because of the fog and the wetter soil near the Laguna. We will come out and inspect it for free. Call (888) 635-0804.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Sebastopol and Sonoma County. If the pane is not true, the job is not done.



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