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Mr-Glass Home Additions & ADU: The San Francisco Owner’s Guide
We stock and install Mr-Glass-compatible home addition and ADU components throughout San Francisco, with full-project pricing typically ranging from $53,100 to $153,400 depending on scope, site conditions, and the specific Mr-Glass parts your build requires. Most homeowners discover a failing component the same way: a window that no longer seals against fog rolling in off the Pacific, a sliding door that sticks after the temperature swings of a Richmond District afternoon, or a skylight in the Sunset that’s begun weeping during winter rains. The part itself is rarely the whole story; it’s what that part is attached to that determines whether you’re looking at a swap or a rebuild.
If you’re holding a failed Mr-Glass window, door, or skylight and wondering whether it can be matched to your existing framing, the short answer is usually yes, and we’ll walk you through exactly how we verify that before any price lands in writing.
Key Takeaways:
- We service and replace Mr-Glass home addition and ADU components in San Francisco, including windows, sliding doors, skylights, and related glazing assemblies.
- Full home addition or ADU projects in San Francisco run $53,100 to $153,400; a single Mr-Glass window or door replacement typically sits at the lower end of the window replacement range ($5,310 to $17,700).
- Written pricing before any work starts, every time.
- Elmstead Remodeling San Francisco is an independent service provider, not affiliated with Mr-Glass itself.
Which Mr-Glass Models This Applies To
Mr-Glass components show up most often in San Francisco ADUs and home additions built between roughly 2012 and the present, particularly in projects permitted through the city’s ADU streamlining programs. The parts we encounter most frequently include dual-pane casement windows, sliding patio doors with integrated blinds, and fixed or vented skylight units designed for flat or low-slope roofs – the kind you see on the horizontal additions common in the Outer Sunset and the Excelsior, where roof pitch stays minimal to keep water moving toward scuppers and drains.
The compatibility gotcha we see regularly: Mr-Glass window and door dimensions are often specified in metric units on the original order paperwork, but the aluminum or wood framing around them was custom-cut in inches by the original installer. That means the replacement needs to be measured from the interior glass edge, not the rough opening, or you’ll end up with a unit that’s 8 to 12 millimeters off and a seal that fails within a year. We pull the original labels or measure the glass directly, then confirm against the spec sticker on the frame before ordering.
The OEM-vs-aftermarket decision for Mr-Glass specifically comes down to age and location. For units under seven years old, we always recommend OEM-spec replacement glass or hardware; the coatings and gas fills match what the rest of the assembly was built around. For older units or coastal locations like the Outer Richmond, where fog and salt air have already worked the original seals, a quality aftermarket dual-pane unit with upgraded Low-E coating often outperforms the original spec at a lower cost. We’ll show you both options with the actual prices and let you decide.
Styles & brands we work with
Signs Your Mr-Glass Home Additions & ADU Is Failing
- Condensation between the panes, even on dry days. This means the argon or krypton gas fill has escaped and the desiccant inside the spacer has saturated. No amount of wiping fixes it; the seal has failed and the insulating value of that unit is gone.
- A skylight that weeps or drips during winter rain, not just heavy storms. In San Francisco, the culprit is usually not the glass itself but the flashing membrane around the curb, which the original Mr-Glass installation may have relied on too heavily. We pull the interior trim to confirm before touching any roofing.
- Sliding doors that drag, jump, or need two hands to move. The roller assemblies in Mr-Glass sliders are often nylon-wheeled and designed for lighter use than a family with kids and a dog puts on them daily. When the wheel flattens, the door rides on the track and grinds the frame.
- Fog or haze that can’t be cleaned off the interior surface. This is usually failed edge seal chemistry, not dirt. Once the perimeter adhesive breaks down, the window will never regain its clarity, and the Nextdoor debates about vinegar versus ammonia are not going to solve it.
- Drafts you can feel with your palm, even when the window is locked. The compression gaskets on Mr-Glass casement and awning windows harden with San Francisco’s temperature cycling, especially on west-facing exposures that take afternoon sun and evening fog. Once hardened, they hold the sash but not the air seal.
See the difference
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After
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After
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AfterReplacement Cost & What’s Included
For a single Mr-Glass window or sliding door replacement in San Francisco, you’re typically looking at $5,310 to $17,700 installed, depending on size, story height, and whether we’re matching an existing window replacement or rebuilding the opening as part of a larger home addition or ADU project. A full ADU construction where Mr-Glass glazing is one component runs $106,200 to $259,600. A home addition lands between $53,100 and $153,400.
What drives the range in San Francisco more than anywhere else in the region: access. A ground-floor window with clear ladder access on a flat Outer Sunset street is a different job than a second-story skylight on a hillside lot in Noe Valley where the crew sets up on a slope and the city requires staging and tie-offs. We write both scenarios out line by line so you can see exactly where the money goes.
Every quote includes the part, the labor, the flashing and sealants, disposal of the old unit, shoe covers and drop cloths inside the house, the written price before work starts, and a photo of the clean-up before the crew leaves. The 365-Day Done Right Promise covers every replacement: if it’s not done right after the job is complete, we make it right.
| Service | San Francisco Price Range |
|---|---|
| Window Replacement (typical Mr-Glass compatible) | $5,310 – $17,700 |
| Home Addition (full project) | $53,100 – $153,400 |
| ADU Construction (full project) | $106,200 – $259,600 |
| Garage Conversion (full project) | $35,400 – $94,400 |
We keep relationships with suppliers for KraftMaid, Cambria, and Silestone materials as well, so if your Mr-Glass replacement is part of a bigger addition or ADU finish, we can coordinate window, cabinet, and countertop sourcing under one written price instead of juggling three contractors.
DIY or Call Us?
There are two things you can safely check on your own. First, look at the spacer between the panes of any foggy window; if you can see a thin metal or plastic strip around the perimeter, that’s the seal spacer, and any visible cracking or separation confirms the failure. Second, for a sliding door that drags, look at the bottom track. If you see a groove being scratched, the roller wheel is flat.
What we’d rather you not do? Attempt a full unit swap yourself, especially on anything above ground level or any window integrated into a roof assembly. Glass units are heavy, the frame shims in San Francisco additions are often load-bearing to the point where removing a window changes the opening, and a dropped pane on a driveway or a child’s play area isn’t a risk worth taking. Swapping a casement unit on a stucco or Hardie exterior requires a brake, proper flashing tape, and some judgment about whether the original underlayment is still doing its job. If you’ve already lost the argument with the window, call (831) 480-4497 and we’ll quote the replacement without any pressure.
Tell me what the room needs to do, and we’ll figure out the rest from there.
FAQs
In San Francisco’s coastal climate, expect 12 to 18 realistic years from a Mr-Glass dual-pane unit before the edge seal chemistry starts failing; inland placements in neighborhoods like Glen Park or the Mission might push toward 20, while fog-belt homes in the Outer Richmond or Parkside often need attention closer to 12. The frame can be resurfaced or repainted, but the seal is a chemical bond that simply degrades with temperature and moisture cycling. Call (831) 480-4497 if your unit is in that range and you’re seeing fog.
For the glass itself, no: a breached dual-pane seal cannot be reliably restored, and attempts at drilling-and-refilling are temporary and void any remaining warranty. Hardware like rollers, gaskets, and locking mechanisms can absolutely be repaired, and we’ll tell you honestly which path makes sense for your budget. Call (831) 480-4497 and we’ll give you the straight answer.
A straight single-unit swap typically takes half a day on site, with a few days for ordering the correctly measured glass before we arrive. Larger projects, like refitting all the Mr-Glass glazing in an ADU, run longer but still follow the written timeline we provide before work begins. Call (831) 480-4497 to schedule a free estimate.
We stock common gaskets, roller kits, locking hardware, and sealants on the truck for immediate repairs, but glass units themselves are ordered per job because the dimensions are specific to your opening. The turnaround is typically three to five business days in San Francisco. Call (831) 480-4497 and we’ll confirm timing for your exact model.
Written by Graham Stein, Owner, Elmstead Remodeling San Francisco at Elmstead Remodeling San Francisco, serving San Francisco and nearby areas.
