Structural Carpentry
Beyond the Surface—Strength That Lasts
Beyond the Surface—Strength That Lasts
At Costello Carpentry, our structural carpentry keeps your home safe, straight, and quiet. We handle load bearing wall removal with engineered LVL or steel beams, joist sistering for sagging floor repair, subfloor leveling before tile or LVP, new headers for widened doorways, and framing repair after water or termite damage.
We replace sill plates and rim joists, add basement beams and lally columns, upgrade crawlspace support, and build shear walls where needed. Every project includes proper shoring, permits and inspections, quality connectors and hangers, and clean site protection. Planning a remodel or new opening? We make the structure finish ready so cabinetry, flooring, and drywall install cleanly and pass code the first time.
Why Choose Costello Carpentry?
Structural experience rooted in hands-on carpentry knowledge
Safety-first approach to every repair and remodel
Clean framing and accurate measurements every time
Respectful of your space, even when working behind the walls
What We Build & Repair:
Framing Repairs & Modifications
We inspect and repair existing framing to correct sagging, shifting, or weakened structures—and make changes to accommodate new layouts and additions.
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Stud wall repairs and reinforcement
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Window and door header adjustments
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Load-bearing wall modifications (where applicable)
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Frame strengthening for remodels or upgrades
Custom Structural Builds
From room additions to new interior partitions, we build the framework that supports everything else. Our team works from plans or collaborates with designers to get it right from the inside out.
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New room framing and layout changes
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Custom partition walls and half-walls
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Built-in niches, shelving, and support structures
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Precise measuring and level alignment
Support Beam & Substructure Work
When it comes to the bones of your home, we don’t cut corners. We install and upgrade beams, braces, and supports to handle weight loads and prevent future settling or shifting.
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Beam installation and replacement
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Floor and ceiling joist repair
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Subfloor reinforcement and bracing
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Moisture damage repair in structural areas
Load-Bearing Assessment
We take structural integrity seriously. If you’re removing walls or altering your floor plan, we provide assessments to identify load-bearing structures and safely support the changes.
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On-site inspection of structural walls
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Temporary supports during remodels
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Collaboration with engineers if needed
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Safe, code-compliant modifications
Free Consultations & Estimates
If your home needs stronger bones, smarter layouts, or safe structural changes, we’ve got the tools and the experience to do it right.
Let’s talk about your next project.
At Costello Carpentry, we handle the Structural Carpentry work that makes remodels feel solid every day, not just on reveal day. If you need load bearing wall removal with an LVL or steel beam, joist sistering for sagging floor repair, or subfloor leveling before tile or vinyl plank, we do it to spec and to code. Our team sizes beams correctly, transfers point loads to proper posts and footings, and documents the work for permitting and inspections. The result is finish ready framing that keeps cabinets square, doors from binding, and floors from telegraphing dips and seams.
Homeowners call us for three common issues. First, openings that were widened without the right header begin to crack and shift. We fix that with new headers, proper jacks and kings, and clean load paths so drywall and trim stay tight. Second, bouncy rooms and squeaks point to undersized or notched joists. We sister joists, add blocking, and reinforce the subfloor so tile and LVP have a flat, stable base. Third, moisture damage at the sill plate or rim joist weakens the edge of the house. We remove the rot, replace members with treated stock, and improve drainage and flashing so the problem does not return.
Planning a layout change or addition. We build new interior partitions, half walls, and knee walls with solid backing for finishes, niches, and shelving. In basements and crawlspaces, we add beams, lally columns, and bracing to correct settlement and deflection what ever the Structural Carpentry need. Where an engineer is required, we coordinate, follow stamped details, and keep the project moving. During active remodels we set temporary shoring and dust control so your home stays safe and livable.
If you are not sure where to start, look for these signs that structural carpentry is needed. Doors that rub or won’t latch. Cracks that keep returning above windows and openings. Floors that run out of level toward the center of the room. Soft or spongy spots near exterior walls. Deck ledgers without flashing. Any of these can be corrected with targeted framing repair before you invest in finishes.
Get a straightforward assessment, a clear scope, and framing work that passes inspection the first time. When the bones are right, everything else goes faster and lasts longer.