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Mr-Glass Home Additions & ADU: The Houston Owner’s Guide
A Mr-Glass home addition or ADU in Houston typically costs between $45,000 and $130,000 installed, depending on square footage, foundation requirements, and finish level. We stock and install Mr-Glass-compatible components for home additions and ADUs across Houston, and our team can usually assess your project within a few days of your call. Most owners discover they need help when a structural or finish component in their existing Mr-Glass addition starts showing signs of failure: door frames pulling away from walls, drywall cracking along seams where the addition meets the original structure, or flooring that has begun to slope or bounce.
We’re Penhallow Remodeling Houston, an independent service provider. We’re not affiliated with Mr-Glass, but we work on Mr-Glass additions and ADUs regularly because so many Houston homes have them. Trevor Nash and our crew know how these structures were built and, more importantly, how they fail in our specific climate, where clay soil and summer heat stress everything from footings to door frames.
Which Mr-Glass Models This Applies To
Most Mr-Glass additions and ADUs in the Houston market fall into two general categories: attached room additions framed with standard 2×4 or 2×6 lumber, and detached ADU structures built on slab or pier-and-beam foundations. The compatibility question that matters most is not the brand name on the original plans, it’s the foundation type and the connection point between the original home and the addition.
Start by looking for the builder’s tag. On most Mr-Glass projects, there’s a small metal plate or laminated card inside the breaker box door, on the interior of a closet, or stamped into the concrete near the water heater. That tag will usually note the project year and the series designation, which helps us order the right door sizes, window rough openings, and finish materials. If the tag is gone (sun and humidity in Houston are hard on labels), measure the interior door rough openings and note whether the structure sits on a slab or has a crawl space. Those two details tell us more than the model name in most cases.
For replacement components, we default to OEM-spec materials matched to the original build whenever they’re available. Mr-Glass additions in Houston were commonly finished with standard-size prehung doors and single-hung windows, which makes sourcing straightforward. Where OEM parts are discontinued, we have good aftermarket equivalents we’ve used for years. For finish materials like countertops and cabinets, we install Cambria, Silestone, and KraftMaid in these spaces regularly, and each carries its own manufacturer warranty alongside our written workmanship guarantee.
Styles & brands we work with
Signs Your Mr-Glass Home Addition or ADU Is Failing
- Cracks at the seam where the addition meets the original house. Houston’s clay soil expands and contracts with moisture, and the two structures settle at different rates. The crack is rarely cosmetic; it usually means the connection detail needs to be inspected and re-secured.
- Doors inside the addition that stick or won’t latch. This is settlement, not humidity. When a doorway loses its square, the floor or wall around it has moved. We see this first in additions built on pier-and-beam foundations in neighborhoods with high-water tables.
- Drywall cracks radiating from window corners. In Houston, wind-driven rain finds these cracks fast. What starts as a hairline can become a water intrusion point within one hurricane season.
- Floor slope or bounce in the addition. A slope of more than a quarter inch over a four-foot span means the joists or the footing below them are no longer doing their job. Bounce usually points to undersized joists for the span.
- Mold smell or staining along baseboards. That’s often a flashing detail that failed at the roof-to-wall intersection on the addition, which is the most common water entry point we fix in Houston’s storm season.
Replacement Cost & What’s Included
Installed home addition and ADU work in Houston runs $45,000 to $130,000 for a full project. Smaller scoped repairs, like re-securing a connection point, re-flashing a roofline, or replacing a settling door frame, typically land in the $3,000 to $12,000 range depending on what we find once we open the wall.
What drives the number: foundation type (slab is usually less expensive to correct than pier-and-beam), whether we’re doing structural work or finish work, the condition of the existing framing behind the drywall, and the finish level you want on the rebuild. A simple repair with primed drywall and builder-grade trim costs less than matching custom millwork and repainting the whole addition.
Every estimate is a written, line-item price before work starts. That number includes all labor, materials, disposal, permits, and inspection fees. If we find something unexpected inside the wall, we stop, show you, and give you a revised written number before we proceed. You will never get a change order you didn’t approve in writing first. And every project carries our 365-Day Done Right Promise: if the repair fails inside a year, we come back and fix it at no charge.
See the difference
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AfterDIY or Call Us?
You can safely do a few things before you call. Check for the builder’s tag we described above. Look at the crack pattern: cracks wider than a quarter inch, or cracks that have grown since you first noticed them, tell us the movement is active and needs professional attention. You can also check the crawl space (if you have one) for standing water or visible gaps between the sill plate and the foundation. Do not jack up floors, sister joists, or try to repair a roof-to-wall connection yourself. Those are structural tasks where a mistake means the repair fails, the damage spreads, and the fix costs double what it would have.
If your Mr-Glass addition is showing any of the failure signs above, call us at (254) 527-5340 and we’ll schedule an assessment. We’ll give you a straight answer on what’s wrong and what it costs to fix.
FAQs
A properly built addition or ADU in Houston should last 50 years or more for the structure itself, but finish components like flashing, caulk, and door hardware typically need attention every 10 to 15 years due to our humidity and storm exposure. The first failure point in most Houston additions is the roof-to-wall flashing, not the framing.
Most additions can be repaired. We’ve stabilized dozens of settling additions with proper footing correction and re-secured connection points. Full replacement is rare, usually only when water intrusion has gone unaddressed for years and the framing has rotted. Call (254) 527-5340 and we’ll tell you which path you’re on before any work begins.
A standard scope, like re-flashing a roofline or re-securing a door frame, takes two to four working days. Structural correction work, if we need to access and reinforce footings or joists, typically runs one to three weeks depending on drying time and inspection scheduling with the city of Houston.
Our trucks carry the materials needed for the most common repairs: flashing, door frames, standard interior prehung door sizes, and structural connectors. Specialty items like custom windows or matched millwork we order project-specific, and lead times in Houston are typically one to three weeks depending on the manufacturer.
Call Penhallow Remodeling Houston
Give me the straight story on what you need, and I’ll give you the straight number on what it costs. That’s how Trevor Nash runs every project, and it’s how you’ll know you’re working with a company that puts the price in writing before we touch a wall.
Call (254) 527-5340 to schedule your free estimate. A real person in our Houston office answers the phone, any hour, any day. If your Mr-Glass addition is failing, we’ll get you an assessment, a written price, and a plan to fix it right, backed by our 365-Day Done Right Promise in writing.
Written by Trevor Nash, Owner, Penhallow Remodeling Houston at Penhallow Remodeling Houston, serving Houston and nearby areas.
