Commercial Construction Montreal
Montreal's Trusted Commercial General Contractor
Castelli & Carson Construction delivers commercial construction projects across Greater Montreal under full RBQ licensing and CCQ-compliant trade coordination. From office buildouts and retail fit-outs to multi-unit residential and commercial roofing — one licensed contractor, one point of accountability, from permit to final inspection.
Built for Commercial Standards
Commercial construction in Quebec demands a higher level of licensing, coordination, and technical execution than residential work. Castelli & Carson Construction holds RBQ 1.3 licensing — the designation required to legally perform general commercial construction in the province — and coordinates only CCQ-registered trades on every project.
Whether you are a business owner fitting out a new space, a property manager overseeing tenant improvements, or a developer building multi-unit residential, CCC delivers the structured process, licensed expertise, and transparent communication that commercial projects demand.
Commercial Project Types
Every commercial project is different. We bring the same licensed process, trade coordination, and permit management to each category.
Office Buildout & Tenant Improvement
Full office construction from shell condition to move-in ready — demising walls, ceilings, electrical distribution, data infrastructure rough-in, HVAC coordination, flooring, and millwork. We work with occupied buildings and manage phased occupancy throughout.
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Retail Fit-Out & Store Construction
Retail space construction from raw shell to grand opening. Custom millwork and shelving systems, lighting layout, flooring installation, storefront modifications, signage rough-in, and fixture installation — on schedule for your opening date.
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Restaurant & Food Service Construction
Commercial kitchen construction including grease trap installation, gas line rough-in, commercial exhaust hood coordination, tile flooring systems, NSF-compliant surfaces, and dining room buildout — managed under a single coordinated contract.
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Multi-Unit Residential
Duplex, triplex, and quadruplex construction, conversion, and renovation. Common area renovations, unit improvements, and new plex construction — all delivered with full permit management under RBQ 1.3 licensing.
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Medical & Professional Clinics
Healthcare and professional office construction with attention to accessibility compliance, specialized plumbing configurations, exam room layouts, sterilization area requirements, and electrical systems for medical equipment.
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Commercial Roofing Systems
Flat roof membrane installation and replacement for commercial properties using SOPREMA and IKO elastomeric systems. Full building envelope delivery under one RBQ-licensed contractor — no separate roofing contract required.
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Our Commercial Construction Process
Commercial projects require tighter coordination, more precise scheduling, and stricter documentation than residential work. Our process is built around keeping your project on budget, on schedule, and fully compliant from the first permit application to the final occupancy sign-off.
Site Assessment & Scope Definition
Existing conditions review, structural evaluation, code compliance analysis, and detailed scope documentation before any commitment.
Permit Application & Trade Coordination
Full permit management with the municipality, CCQ trade assignment, and phased schedule development aligned with your operational requirements.
Structural & Mechanical Rough-In
Framing, electrical distribution, plumbing rough-in, HVAC coordination, and fire protection work completed to code and inspected.
Finishing & Millwork
Drywall, flooring, ceiling systems, custom millwork, painting, and all finish trades coordinated in proper sequence.
Final Inspection & Occupancy
Code-aligned final inspection, deficiency clearance, occupancy permit coordination, and full project documentation delivered to the client.
Licensed for Commercial Work in Quebec
All commercial construction in Quebec legally requires RBQ licensure. Castelli & Carson Construction holds both RBQ 1.2 (residential roofing) and RBQ 1.3 (general commercial construction) — both licenses are active and verifiable through the RBQ public contractor directory. Hiring an unlicensed contractor for commercial work in Quebec creates permit refusal, insurance liability, and legal exposure. Our credentials protect your project.
Commercial Construction Services Available In
Montreal
- ✓ Ahuntsic-Cartierville
- ✓ Anjou
- ✓ Côte-des-Neiges–NDG
- ✓ LaSalle
- ✓ Lachine
- ✓ Le Sud-Ouest
- ✓ Mercier–Hochelaga-Maisonneuve
- ✓ Outremont
- ✓ Pierrefonds-Roxboro
- ✓ Plateau-Mont-Royal
- ✓ Rosemont–La Petite-Patrie
- ✓ Saint-Laurent
- ✓ Saint-Léonard
- ✓ Verdun
- ✓ Ville-Marie
- ✓ Villeray–Saint-Michel–Parc-Extension
West Island
- ✓ Pointe-Claire
- ✓ Dorval
- ✓ Beaconsfield
- ✓ Kirkland
- ✓ Dollard-des-Ormeaux
- ✓ Sainte-Anne-de-Bellevue
- ✓ Baie-D'Urfé
- ✓ Senneville
Laval
- ✓ Chomedey
- ✓ Sainte-Dorothée
- ✓ Laval-des-Rapides
- ✓ Duvernay
- ✓ Auteuil
- ✓ Sainte-Rose
- ✓ Fabreville
South Shore
- ✓ Longueuil
- ✓ Brossard
- ✓ Saint-Lambert
- ✓ Boucherville
- ✓ La Prairie
- ✓ Candiac
- ✓ Châteauguay
- ✓ Saint-Constant
- ✓ Delson
Vaudreuil Region
- ✓ Vaudreuil-Dorion
- ✓ Saint-Lazare
- ✓ Hudson
- ✓ Rigaud
- ✓ Pincourt
- ✓ Notre-Dame-de-l'Île-Perrot
- ✓ L'Île-Perrot
- ✓ Terrasse-Vaudreuil
Commercial Construction FAQ
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