Mr-Glass Home Additions & ADU Nationwide

Mr-Glass Home Additions & ADU: The Los Angeles Owner’s Guide

If you own a home with a Mr-Glass addition or ADU and a part has failed, we can match it, source it, and install it. A full Mr-Glass home addition or ADU replacement in Los Angeles typically runs $53,100 to $153,400, depending on square footage, foundation work, and finish level. Most owners discover a problem the same way: a door stops sealing, a window binds, or a corner of the addition settles enough that drywall cracks run from the ceiling line. Call (936) 259-2607 and Trevor or a technician will walk you through what we’re seeing and what it’ll cost before anyone picks up a tool.

Call (936) 259-2607

Which Mr-Glass Models This Applies To

Mr-Glass enclosures, sunrooms, and prefabricated ADU shells come in a few standard profiles, and the part you need depends on which one you have. We see three configurations most often in Los Angeles: the single-slope patio cover style, the gable-end prefab ADU shell, and the laminated glass wall panel system used on higher-end additions. Each uses different extrusion depths for the aluminum framing, which means a glazing gasket from a single-slope unit will not seat correctly in a gable-end track. The failure is not the gasket. It’s the mismatch.

To identify your part, look for a sticker or etched code on the vertical mullion, usually starting with “MG” followed by four digits. That code tells us the extrusion profile, glass thickness, and the year the shell was manufactured. If the sticker is gone, measure the visible glass width across the face of the panel. Mr-Glass panels are typically 24, 30, or 36 inches wide, and that measurement narrows the field fast. OEM Mr-Glass parts are available for most shells built after 2010. For older shells, quality aftermarket extrusions from Cardinal or CRL match the tolerances well, and we’ll tell you honestly which one your job needs. Penhallow Remodeling is an independent contractor, not affiliated with Mr-Glass, so we carry both OEM and aftermarket options and price them side by side.

Signs Your Mr-Glass Home Additions & ADU Is Failing

• Condensation between the glass panes. This means the seal on the insulated glass unit has failed. Once the desiccant inside the spacer bar saturates, the fog is permanent and the only real fix is glass replacement, not cleaning.
• Water staining at the base of a mullion or door threshold. Usually the weep holes in the bottom track are clogged, or a glazing gasket has shrunk and pulled away from the corner. In Los Angeles, the dry season masks this for months before the first winter rain exposes it.
• Aluminum frame screws that spin instead of tighten. The screw bosses inside the extrusion strip over time, especially on units facing afternoon sun. A panel that can’t be torqued down is a panel that moves in wind.
• Doors that drag or won’t latch. The header beam on some Mr-Glass ADU shells carries more load than the original spec accounted for once owners add ceiling fans or solar roof mounts. The beam deflects, the door falls out of square, and the rollers wear unevenly.
• A grinding rumble when the wind comes through the San Fernando Valley. Loose panel retainers or a cracked setting block lets the glass vibrate against the aluminum frame. It starts as a hum and turns into a stress crack if you ignore it.

Replacement Cost & What’s Included

For Mr-Glass home additions and ADU work in Los Angeles, the installed price range is $53,100 to $153,400. A minor panel or gasket replacement on an existing shell is a fraction of that, but we’re quoting the full replacement range because that’s what the lead number on this page refers to. What drives the cost: total square footage, whether the foundation needs piers or seismic retrofit, ceiling height, glass spec (laminated vs tempered vs Low-E), and how much of the existing shell can be salvaged. A 400-square-foot ADU with standard glass and a clean slab sits near the bottom of the range. A 900-square-foot addition on a hillside lot with permitting and engineering climbs fast.

Every quote includes a written, line-item price before we start. You’ll see the part cost, the labor, the permit fees if required, and the disposal line separately. No allowances for “unforeseen conditions” that turn into change orders on day three. If the number changes, it changes on paper and you agree to it before we proceed. The work carries our 365-Day Done Right Promise: if anything fails inside that year, we come back and fix it at no charge. That’s in writing on every project, including parts replacements. We also install parts from KraftMaid, Cambria, and Silestone when your addition or ADU ties into interior work, so the cabinetry and countertops carry their own manufacturer warranties alongside ours.

DIY or Call Us?

You can safely inspect and clean most Mr-Glass components. Clearing weep holes with a soft brush, checking screws for looseness, and inspecting gaskets for visible shrinkage are all reasonable homeowner tasks. What you shouldn’t do is remove a glass panel from a laminated wall section without a second set of hands, or attempt to reseat a sliding door by yourself. A 30-by-84-inch insulated glass panel weighs over 80 pounds. The frame clips release suddenly when the pressure is right, and a dropped sheet of tempered glass is a trip to urgent care. If the part is a door roller, a setting block, or a gasket seal, we can usually handle it in one visit and price it while we’re there. Call (936) 259-2607 and we’ll schedule a time that works, show up in the window we gave you, and tell you the price before anything gets disassembled.

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