







Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Barrette Home Additions & ADU: The Riverside Owner’s Guide
If you own a Barrette home addition or ADU and a component is failing, we can match the part and install it at a flat, written price. Installed work on Barrette additions and ADUs in Riverside typically runs $45,000 – $130,000 depending on scope, though smaller component repairs or upgrades like a failed door threshold, a rotted trim section, or a cracked window is usually measured in hundreds, not tens of thousands. Most owners discover the problem the same way: a door stops latching clean, water shows up where it shouldn’t, or a section of siding pulls away from the framing after a few hot Inland summers. We’re an independent remodeling company in Riverside, not affiliated with Barrette, but we work on their products regularly and we know how they age in this climate.
Key Takeaways:
- We match Barrette addition and ADU components to your existing build and give you a written price before any work starts.
- Riverside heat and dry rot are the two biggest enemies of addition components here; flashings and exterior seals fail first.
- Every job carries a 365-Day Done Right Promise in writing, and if a repair fails within the guarantee window, we return and fix it free.
- Call (341) 895-1170 for a free estimate on any Barrette addition or ADU component issue.
Which Barrette Models This Applies To
Barrette produces exterior building products, so the parts you’re dealing with on a home addition or ADU are typically exterior trim, siding accessories, decorative brackets, railing components, or door and window surrounds. The compatibility gotcha most Riverside homeowners run into is dimensional: Barrette’s trim and accessory lines come in distinct profile depths and widths, and a 3/4 inch fascia board is not interchangeable with a 5/4 inch version, even when they look close from six feet away. Measure the exposed face width and the profile depth before you buy anything. The OEM decision is usually straightforward on these parts: if the original is dry-rotted or delaminating, an aftermarket PVC or composite replacement matched to the profile is often more durable in Riverside’s dry heat than the original wood-based product. Where we do recommend OEM is on visible cosmetic pieces like decorative brackets, where a slight color or grain mismatch is the kind of thing you’ll notice every time you pull into the driveway for the next ten years. If you can find a label, Barrette parts usually carry the part number stamped on the back or end; if there’s no label, bring us a photo and a measurement and we can typically identify the profile.
Styles & brands we work with






Signs Your Barrette Home Additions & ADU Is Failing
- Doors and windows start sticking or won’t latch: These failures usually trace back to swelling from moisture intrusion around the exterior trim or uneven settling in the addition’s framing. In Riverside’s dry spells, the material then dries and shrinks, but the seal is already broken.
- Exterior trim shows soft spots, flaking paint, or visible rot: This is the classic failure point on older Barrette wood-based trim. Water pools somewhere in the flashing or along a seam, and once the wood wicks it, rot follows. Composite replacement stops the cycle.
- Water staining on interior drywall near the floor or ceiling corners: The stain is never the problem, it’s the symptom. On additions, the culprit is usually flashing that shifted, a sealant joint that failed, or a roof-to-wall connection that was never flashed properly in the first place. We’ve opened these up in the Arlington neighborhood and found everything from missing kickout flashing to caulk that turned into dust.
- Gaps opening between the addition and the original house: Settling is real, and an addition moves differently than the original structure. Small gaps at the transition line are common in Riverside; gaps that widen or let water in are structural and need a proper fix, not a tube of caulk.
- Decorative brackets or railing sections feel loose or look cracked: On an ADU, these often take direct sun exposure and fail through material fatigue rather than water. Once a bracket cracks, it’s cosmetic until it isn’t, and a loose railing section is a safety issue worth addressing before it becomes a liability.
See the difference
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After
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After
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AfterReplacement Cost & What’s Included
For a full Barrette home addition, Riverside pricing typically lands between $45,000 and $130,000 depending on square footage, foundation work, roofline tie-in complexity, and finish level. ADU construction runs higher, from $90,000 to $220,000 once you factor in utility runs, separate metering, and code requirements. But if you’re here because a specific component is failing on an existing structure, the scope is much smaller and so is the number. Replacing rotted exterior trim on one wall might run $1,200 – $3,800. A door surround rebuild, $800 – $2,000. A failed flashing correction, $600 – $2,500. We give you one written price before any work starts, and that number covers the part, the labor, the disposal, and cleanup. It does not change at the door. If the repair fails within 365 days, we come back and fix it at no charge, and that’s in writing, too. We source our materials from recognized trade brands, so the replacement part behind our guarantee is as solid as the promise itself.
DIY or Call Us?
You can safely identify a trim profile, check for soft spots, and take photos. What gets homeowners into trouble is prying off rotted trim without knowing what’s behind it, because the same water that rotted the trim may have compromised the sheathing or framing underneath. If you open a wall and find structural damage, you’ve now got a much bigger job on your hands than you planned. The other place DIY goes sideways is flashing work: a repair that looks fine but still lets water in will quietly damage your addition for months before you see the stain. This isn’t high-tension work like a garage door spring, but it’s exterior envelope work and it needs to be done right the first time. If you’re comfortable with the cosmetic pieces, fine. If it involves water, structure, or a transition between the addition and the original house, call us at (341) 895-1170. Give you a number before we pick up a tool, that’s just how this works.
FAQs

A properly flashed and sealed exterior component on a Barrette addition in Riverside should last 15 to 25 years. The Inland Empire’s UV exposure and dry heat shorten the life of exterior seals and wood-based trim compared to coastal climates, so we typically see failure starting at the seams and flashings between year 10 and 15. Call (341) 895-1170 and we’ll inspect yours and tell you honestly what’s left in it.
Small cosmetic cracks and superficial surface damage can sometimes be epoxy-filled and refinished, but if the material is soft, delaminating, or has rot extending behind the visible face, repair is a temporary patch at best and replacement is the sane call. We’ll tell you which one you’re looking at before you spend a dime, and the estimate is always free.
Most exterior trim, flashing, or bracket replacements on a Barrette addition take one to two working days once materials are on hand. If we find structural damage behind the failed part, the schedule adjusts, and we’ll tell you that before we take another step. We show up in the window we gave you, and a live person answers the phone 24/7 if you need to reach us.
We stock common profile trim, PVC replacements, flashing materials, and fasteners on our trucks so we can address dooring, sealing, and trim issues in one visit. Specialty pieces like decorative brackets or railing sections with a specific grain pattern are ordered to match your existing profile, and we’ll tell you the lead time up front. Call (341) 895-1170 for an exact answer on your part.
If your Barrette addition or ADU in Riverside needs a real repair, not a guess, call (341) 895-1170. We’ll match the part, write you a number, and stand behind the work in writing for 365 days. Free estimates, no pressure.
Written by Trevor Nash, Owner, Penhallow Remodeling Riverside at Penhallow Remodeling Riverside, serving Riverside and nearby areas.


