Renovation & Interior Construction You Can Rely On in Kitchener
Interior Systems Group delivers disciplined, predictable interior renovations across Kitchener, Waterloo, Cambridge, Guelph, London, Hamilton, and Milton — clear scope, firm pricing, professional scheduling, and finishes that pass inspection.
100% local
Team Work
5+ years experience
About Us
Interior Systems Group was built out of hands-on experience, not theory. After years inside interior construction projects that stalled from poor coordination and unclear scope, we started ISG to bring structure, accountability, and honest communication to every job. Our five-person team plans work carefully, flags issues early, and closes jobs completely — no “almost done” handoffs. We’re fully insured (CAD $5M liability) and WSIB-covered, and we back our workmanship with a 12-month warranty for installations we supply.
WHAT WE ARE BEST AT
OUR SERVICES
Full bathroom remodels, from demo and plumbing rough-in to tile, fixtures, and trim, finished to code and inspection standards.
Convert basements into usable living space with framing, insulation, drywall, egress, and finished flooring that meet municipal requirements.
Complete kitchen overhauls or targeted upgrades with disciplined sequencing to minimize disruption and deliver on schedule.
Tenant fit-outs and interior build-outs for offices and retail that prioritize clear scope, tight schedules, and clean handoffs to property managers.
Framing, drywall, patching, and finish carpentry for homes and businesses, executed to drawings and inspection standards.
OUR PROCESS
Our process is simple and only contains a few simple steps
Free Consult
Estimation & Proposal
We do the work
Final Inspection
Payment
SEE WHY OUR CUSTOMERS LOVE US
See Our Work
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REVIEWS
Leon is great, amazing business!
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FREQUENTLY ASKED QUESTIONS
Can you provide references from past clients?
Yes — we’re happy to share recent references and photos of completed projects in Kitchener, Waterloo, and nearby cities. We believe past work shows how we handle scope, schedule, and closeout.
What sets Interior Systems Group apart from other contractors?
We plan projects before we start, give straight answers about costs and constraints, and hold a strict standard for finishing and punch-list closure. In short: no surprises, no excuses, no loose ends.
Is there a fee for a consultation or estimate?
No — we offer a free in-person consultation to review your space, confirm scope, and provide price certainty. If changes are needed later, we only proceed with your written approval.
How long will my renovation take, and what about delays?
Typical timelines are 2–30 days depending on scope. We commit to realistic schedules and correct any delays caused by our team at our cost. Your project will be managed to drawings, code, and inspection standards.
