A Sawyer company - serving Woodland Hills, CA
A new rear addition with a vaulted beamed ceiling and tall windows

Mr-Glass Home Additions & ADU Nationwide

Free Estimate on SiteCalls Answered by a Live Person, 24/7Background-Checked TechniciansA Local Team in Woodland Hills
A garage converted into a guest room and home office
A finished backyard cottage with a small covered porch
A remodeled kitchen with painted cabinets and a farmhouse sink
A remodeled primary bathroom with a soaking tub and walk-in shower
A remodeled living room with built-in shelves around the fireplace
An open kitchen and dining area after a remodel
A freestanding soaking tub in a remodeled primary bathroom
A whole-home remodel with the living, dining and kitchen areas opened up
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Mr-Glass Home Additions & ADU: The Woodland Hills Owner’s Guide

We install and service Mr-Glass-compatible home additions and ADU components throughout Woodland Hills, with full additions running $45,000 to $130,000 and attached ADU construction from $90,000 to $220,000 depending on scope. Most owners discover a failing part mid-project or years after the original build, when a door binds, a corner settles, or water starts finding its way into an interior junction. The fix is rarely the part itself. It’s usually how the part was tied into the surrounding framing.

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Which Mr-Glass Models This Applies To

Mr-Glass components for home additions and ADUs are built around standard 2×4 and 2×6 wall profiles, but the compatibility gotcha in Woodland Hills is the valley’s mixed clay soil. Anything that ties a new structure to an existing slab has to be checked for differential settlement, especially on hillside lots above Topanga Canyon Boulevard where the fill wasn’t compacted to modern specs. If your Mr-Glass header, corner post, or tie-down shows a model stamp, the letter suffix matters: A-series parts are sized for single-story spans up to 16 feet, B-series for two-story loads. OEM parts are worth the money here. Aftermarket equivalents often lose 3/16 inch in flange thickness, and that’s enough to change how the shear panel transfers load. We keep the common A and B series parts on the truck, so a Woodland Hills service call doesn’t turn into a two-week wait on a warehouse order.

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Styles & brands we work with

Kitchen remodeling
Kitchen remodeling
Bathroom remodeling
Bathroom remodeling
Home additions & ADU
Home additions & ADU
Roofing
Roofing
Windows & doors
Windows & doors
Driveway & pavers
Driveway & pavers
Fence
Fence

Signs Your Mr-Glass Home Additions & ADU Is Failing

  • Drywall cracking at the addition-to-house junction – The addition is moving independently of the main structure. This usually means a tie-down has loosened or a footing is settling. In Woodland Hills, we see it most on hillside additions after a wet winter.
  • Doors or windows that stick only in certain seasons – Seasonal swelling from humidity or soil movement. If it’s the same door every August, the frame is flexing, not the wood.
  • Gaps opening under baseboards or where the wall meets the floor – The floor system or the wall plate is sagging. Check the crawlspace venting first; trapped moisture in a Woodland Hills hillside crawlspace accelerates joist rot fast.
  • Water staining on the ceiling below the roof tie-in – The flashing where the addition meets the original roofline has failed or was never lapped correctly. This is a classic MR-Glass installation shortcoming when the original builder rushed the dry-in.
  • A visible lean or a crack you can fit a quarter into – Beyond cosmetic. Hairline cracks are normal as a structure settles. A quarter-width crack means you need a structural evaluation now, not after the next rain.
Before & after

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Before - Recent ProjectBeforeAfter - Recent ProjectAfter
Recent Project
Before - Full RestorationBeforeAfter - Full RestorationAfter
Full Restoration
Before - Complete UpgradeBeforeAfter - Complete UpgradeAfter
Complete Upgrade

Replacement Cost & What’s Included

For the part-level work on a Mr-Glass addition or ADU in Woodland Hills, you’re looking at $45,000 to $130,000 for a full replacement project depending on how far the failure has spread. A simple tie-down replacement with inspection runs the low end of that range. A corner reconstruction with new shear panels, flashing, and drywall repair pushes toward the middle. Full structural remediation on a hillside ADU where the footing has moved climbs to the top of the range. Every quote includes the part, the labor, the fasteners and connectors, the inspection, and a written line-item breakdown before we start. The 365-Day Done Right Promise covers the work for a full year after we close the job. If it’s not done right, we make it right.

DIY or Call Us?

You can check for the obvious: look for new cracks, test doors, check for water staining after rain. But anything involving a Mr-Glass structural component, tie-downs, shear transfer, or footing work is not a weekend project. You’re dealing with the structure holding up your addition or ADU. Getting it wrong means a wall that doesn’t transfer seismic loads properly in an earthquake zone. That’s not a scare tactic. It’s the reality of building in Southern California. If you’ve spotted a crack that concerns you or a door that won’t stay square, call (341) 217-2776. We’ll come out, look at the part and the framing around it, and tell you what actually needs to happen. The estimate is free.

FAQs

A single-story rear room addition with tall windows and a new patio

Getting started with Sawyer in Woodland Hills

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