Window & Door Replacement in Marin and SF
New windows, entry and patio doors, sliders and skylights, plus repairs and warranty service for the brands you already have.
See this projectWindow work has been our specialty for decades
The Home Doctors is an authorized service provider for Andersen, Marvin, Sierra Pacific (including Hurd), Weather Shield and Lincoln windows and doors. A manufacturer may send us your warranty request, or point you to us when the job isn't covered.
We've been voted the #1 handyman and window install and repair service in Marin. Not every window needs replacing, and we'll tell you honestly when one doesn't.
Request an EstimateExamples of our window, door and skylight work
Replacement windowsInserts that keep the old frame, or full-frame replacements when the frame is damaged. 
Entry and patio doorsFront doors, French doors and sliders, hung, sealed and trimmed. 
SkylightsNew skylights and light wells that bring daylight into a dark room. 
Window seatsBuilt-in seats and bays that make the window part of the room. 
Skylight replacementOld leaking units swapped for new ones with a new flashing box. Drag to see the difference
BeforeAfter 
BeforeAfter How a window replacement goes
- 01
Measure
We measure every opening and check the frames for rot, which decides insert or full-frame.
- 02
Order
Windows are made to size, so there's a lead time. Nothing comes out of your wall until they arrive.
- 03
Install
Old units out, new units set, flashed and sealed, a few openings at a time so the house stays closed up.
- 04
Finish
Trim, caulk and paint, and the permit inspection.
Repair or replace?
It sticks, won't lock or jumps its track
That's usually a part: a worn balance, a crank, a lock, rollers or the track. We replace the part and adjust the sash. In Belvedere-Tiburon, we repaired several Pella sliding doors for one client.
The glass is foggy between the panes
The seal on that glass unit has failed. Often we can replace just the glass and keep the frame, if the frame is sound.
The frame is soft or the windows are single-pane
That's when replacement makes sense. Rot in the sill or frame spreads into the wall, and single-pane windows lose heat no matter how well they're adjusted.
Brands we're authorized for
- Andersen Windows & Doors
- Marvin Windows
- Sierra Pacific Industries (including Hurd)
- Weather Shield
- Lincoln Windows
For any of these, we can handle warranty requests the manufacturer sends us, order factory parts and glass, repair or replace sashes and hardware, and install new units from the same line so they match the windows you're keeping. We also work on plenty of other brands, so if your window or door is from another maker, call us anyway.
What our clients say
They just replaced all of our windows and exterior doors along with building us a window bench among other projects. We are always impressed with their level of quality, professionalism and attention to detail.
Thank you for the terrific job the Home Doctors did installing the new windows in our house. … You cheerfully accommodated our many extra requests … and you always dealt with us fairly and honestly.
Mike was very professional and did a great job repairing several of our Pella sliding doors. I very much recommend your company and specifically Mike.
Where we've installed windows, doors and skylights
We're based in Novato at 6 Pamaron Way, Suite A and work across Marin and San Francisco. Each town links to a project we've done there.
- San AnselmoNew front door in San Anselmo
- Ashbury Heights, San FranciscoWindow seat in Ashbury Heights, San Francisco
- Sunnyside, San FranciscoClassic San Francisco skylight replacement in Sunnyside
- KentfieldSkylight additions in Kentfield
- Sunset District, San FranciscoVenting window well cover in the Sunset District of San Francisco
Questions about windows and doors
Should I repair my windows or replace them?
Repair when the frame and sash are sound and the problem is a part: a worn balance, a broken lock or crank, a slider off its track, or one fogged glass unit. Replace when the frame is rotted, the window is single-pane and drafty, or parts for it aren’t made anymore. We tell you which one you have after we look.
How much does window replacement cost in Marin?
It depends on how many windows, their size, the brand and whether the old frames stay (insert replacement) or come out (full-frame). We price your job after we see it. For a public reference point, the median declared value on 422 window replacement permits in unincorporated Marin from 2023 to September 2026 was $13,896, according to County of Marin building permit records. That is the value written on the permit application, not a final invoice.
Can you fix a window that’s still under the manufacturer’s warranty?
Often, yes. We’re an authorized service provider for 5 manufacturers, so the maker may send us your warranty request. Call the manufacturer first with your order or serial number, and tell them you’d like The Home Doctors to do the work.
Do you install windows you didn’t sell?
Yes. We install and service plenty of brands beyond the ones we’re authorized for, including parts, glass and repairs. If you’ve already bought your windows or doors, we can install them.
Do window replacements need a permit?
In most of Marin and San Francisco, yes. Replacing windows usually needs a building permit, and homes in wildfire areas may need fire-rated glass. We pull the permits and book the inspections.
Are you licensed and insured?
Yes. The Home Doctors holds California contractor license #1154343 (B, General Building Contractor), and we are fully insured.
Windows, doors and skylights we've installed
Tell us what your home needs.
Based in Novato, working across Marin, San Francisco, Sonoma, Napa, Contra Costa and Alameda counties. Send a few details and we'll call you back during office hours.