Additions, Basements & Site Prep
Whether you need extra square footage, a finished basement, or turnkey site preparation, Xavier Construction Services LLC has you covered. From initial excavation to final waterproofing and room additions, our licensed Danbury team ensures your project is solid from the ground up.
Why Choose Our Additions & Basement Services?
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Seamless Integration
We tie new foundations and framing into your existing structure so the addition looks and performs like it was always part of the home.
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Moisture-Control Expertise
Professional waterproofing systems and drainage keep basements dry and usable year-round.
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One-Stop Permitting & Prep
We handle permits, grading, erosion control, and utility coordination—no juggling contractors.
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Custom Finishes
From drywall and paint to trim and flooring, every basement or addition receives the same quality craftsmanship as a new home.
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Safety & Compliance
All excavation, foundation work, and structural modifications meet local code and OSHA standards.
Our 5-Phase Additions & Basement Build Process
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Consultation & Structural Review
‣ On-site visit to assess existing structure, soils, and utility access
‣ Discuss scope, layout, and finish options for your addition or basement -
Permitting & Site Preparation
‣ Secure all necessary building permits and inspections
‣ Clear, grade, and excavate the site; install silt fences and erosion controls -
Foundation & Waterproofing
‣ Pour new footings, foundation walls, or slab with rebar and proper drainage
‣ Apply waterproof membranes, interior drains, and sump pumps as needed -
Framing & Rough-Ins
‣ Frame walls, floors, and roofing tie-ins for additions; stud out basement walls
‣ Rough-in plumbing, electrical, and HVAC to suit your finished layout -
Finishes & Handover
‣ Install drywall, trim, flooring, lighting, and fixtures for a turnkey space
‣ Final walk-through to ensure every detail meets your expectations
