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 Mill Valley
Window replacement in Mill Valley runs $850 – $2,400 per window for most homes, with insert replacements on the lower end and full-frame work with custom jambs on the higher end. The biggest variable isn’t the glass, it’s what’s hiding behind the trim on older Hillside-style houses. We’re the windows-and-doors specialist inside the Relay Home Co. family, founded in 2001, and our crews measure real rough openings on Mill Valley homes every week, not just the old sash. Call (682) 281-2168 and you’ll get a live person, a written price before any work starts, and a clear scope for your specific house.
Why Juniper Windows & Doors Is Mill Valley’s Preferred Window Replacement Company
Mill Valley homeowners call us because we answer the phone and we show up when we say we will. Every job gets a written price before a single screw turns, backed by our 365-Day Done Right Promise: if the work isn’t right, we make it right, parts and labor, for a full year. Sean Mackey leads the team, and every technician who walks through your door is background-checked and uniformed. You’ll know exactly who’s arriving, and you’ll have a live arrival time before they pull up.
We work on Mill Valley houses constantly, from the cascading lots off Cascade Drive to the shaded canyons off Edgewood Avenue. The homes here are different from Corte Madera or Sausalito: more Hillside-style construction, more redwood jambs, more tapered openings where a standard insert simply will not seat. We measure the true rough opening every time. When a custom order is needed, we tell you upfront, with the real lead time and the real price. No vague quote that shifts at the door.
Our crews coordinate from the brand’s San Francisco Bay Area office, so scheduling is easy and parts arrive on time. We stock local inventory for common Mill Valley window sizes and brands, which means less waiting on a truck from out of state. With eight product lines available, including PGT, CGI, and CWS, the right window for your house is never a compromise.
Window Glass Repair in Mill Valley
Window glass repair in Mill Valley typically costs $180 – $450 per pane, depending on glass type and whether the sash needs to come out for re-glazing. On hillside homes where the original sash is still square, replacing just the insulated glass unit, or IGU, is often the smarter move than tearing out a perfectly good frame. We remove the sash, order a new IGU matched to the original thickness, and reset it cleanly. The frame stays put, the trim stays put, and the window looks like it always did.
Fogged or Failed Seals
Mill Valley’s damp, coastal air accelerates seal failure. When you see condensation between the panes that won’t wipe away, the seal has gone and the insulating gas has leaked out. That window is no longer doing its thermal job. We replace the IGU and restore the U-factor the window was originally rated for, which matters on foggy canyon mornings.
Single Cracked Pane
A cracked pane on a Mill Valley home is a repair, not a replacement project. We match the glass type, including low-E coatings and laminated interlayers, so the repaired window performs identically to its neighbors. Cost for a standard double-pane cracked unit usually lands in the $220 – $380 range, installed.
Window Pane Replacement in Mill Valley
Window pane replacement in Mill Valley runs $150 – $600 per pane, with laminated glass and impact-rated options at the higher end and standard annealed or tempered at the lower end. Pane replacement means the glass only, not the frame or sash. On Mill Valley homes with original wood windows still in decent shape, pane replacement buys years of additional life without the cost of new construction. It’s the right scope when the glass is broken but the wood is sound.
Laminated Glass for Impact and Light
Laminated glass is two panes bonded with a plastic interlayer, engineered to hold together if something hits it. The interlayer also blocks UV and dampens road noise from Summit Avenue. We stock laminated units for common Mill Valley window sizes, so turnaround is quicker than you’d expect.
Standard Double-Pane
When impact resistance isn’t the issue and the budget is tight, a standard double-pane insulated unit with low-E coating usually runs $150 – $300 per pane in Mill Valley. We’ll spec the SHGC, or solar heat gain coefficient, to match the actual light your house gets. A shaded canyon lot on Edgewood gets a different glass recommendation than a south-facing sunroom off Miller Avenue.
Trusted Brands We Service in Mill Valley
We install and service PGT, CGI, CWS, and ES Windows, plus four more product lines. For Mill Valley customers, that means we’re not married to one manufacturer’s sizing. When a Hillside home needs a custom jamb depth or a tapered opening, we order the unit that fits the opening, not the other way around. We stock local parts for the brands Mill Valley homes already have, so warranty work and glass replacements move faster. Impact-rated glass, built to resist wind-borne debris without shattering, is available across the product lines where Marin County’s wind exposure calls for it.
Common Window Replacement Problems We See in Mill Valley Homes
- Retrofit inserts that don’t match the redwood jamb depth. On post-1940 Hillside-style homes, the existing jamb is often deeper or shallower than a standard replacement insert assumes. We measure the true rough opening and order custom units when the stock size would leave gaps or bind.
- Measuring the old sash instead of the opening. Tapered jambs on hillside lots mean the sash may not be square to the frame. Measure the sash and you’ll get a window that doesn’t close. We measure the opening at multiple points, every time.
- Low-E glass spec’d too aggressively for shaded canyons. A SHGC that’s too low on a fog-heavy, tree-covered Mill Valley lot means a darker living room in winter. We match the glass package to the actual sun exposure, not the generic California default.
- Permit skipped on a sash swap that changes the egress opening. If the new unit alters the opening size or the design pressure value, it needs a permit. We pull permits when required and get the final inspection signed off, so a window change doesn’t become a title issue later.
Pricing for Window Replacement in Mill Valley, CA
A standard insert window replacement in Mill Valley runs $850 – $1,700 per window, installed. Full-frame replacement with new jambs and exterior trim runs $1,500 – $2,400 per window. Window glass repair runs $180 – $450 per pane, and pane-only replacement lands in the $150 – $600 range per pane. The swing comes from glass type, jamb depth, access on steep hillside lots, and whether the opening needs custom sizing. Every project gets a written line-item price before work starts, so the number you see is the number you pay. Call (682) 281-2168 for a free estimate with real numbers for your house.
We rebuilt a failing double-hung unit on Cascade Drive in Mill Valley where the original wood jamb had swelled from years of coastal fog and rain, not from a broken sash. Our tech removed the sash, routed out the rotted jamb, spliced in a primed redwood patch, installed a laminated glass interlayer in a new insulated glass unit, and reset the balances so the window slid cleanly. No full-frame remodel needed, and the homeowner saved thousands.
We Also Serve Cities Near Mill Valley
Our Window Replacement crews work throughout Marin County. Beyond Mill Valley, we regularly serve Corte Madera, Larkspur, Sausalito, and Kentfield. Same written pricing, same 365-Day Done Right Promise, same live scheduling. If you’re in Mill Valley or a neighboring town, call (682) 281-2168 for a free estimate.
Serving Mill Valley, CA - Our Local Coverage Area
We’re based in the Mill 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 About Window Replacement in Mill Valley
Yes, if the replacement changes the rough opening, the egress opening, or the design pressure value, Mill Valley requires a building permit. A direct insert replacement with no structural change typically doesn’t need one. We check the scope before work starts and pull permits when they’re required, with the final inspection included so the job closes clean. Call (682) 281-2168 and we’ll tell you exactly what your project needs.
Most Mill Valley window replacements take 3 – 6 weeks from signed contract to final inspection. Custom units for Hillside homes with non-standard jamb depths add 1 – 3 weeks to the order window. Installation is usually done in a day, and we schedule the inspection immediately after. We’ll give you a written calendar before you sign anything.
A big-box quote usually covers a standard-sized insert window with basic glass and no custom fitting, permits, or inspection. Mill Valley’s older Hillside homes often need custom jamb depths, tapered-opening measurements, and specific glass packages for fog and shade. Our written price includes the window that actually fits your opening, the permit when required, and the inspection, all covered by the 365-Day Done Right Promise. For an exact quote on your house, call (682) 281-2168.
Laminated glass is worth it on Mill Valley homes with noise exposure from Summit Avenue, wind exposure on ridge lots, or south-facing rooms that get harsh afternoon sun. Standard double-pane with low-E is fine for quiet canyon lots where impact and noise aren’t concerns. We spec the glass based on your actual lot, not a one-size default.
Hidden rot in the original jamb, an opening that’s not square, or a permit trigger the homeowner didn’t know about can all change the price. We find these issues during measurement, before work starts, and put the real number in writing then. Once we’re on site, the price holds unless you change the scope. That’s the whole point of a written price: no surprises at the door. Call (682) 281-2168 for a free estimate.
Written by Sean Mackey, Owner at Juniper Windows & Doors, serving Mill Valley, CA.










Before
After
Before
After
Before
After