Roncesvalles's early 20th-century worker cottages and Victorian semis have character above grade — and untapped potential below it. Kopman Build has been converting and finishing Toronto basements since 1999, with the permit management, structural know-how, and code compliance that Roncy's older housing stock demands.
Roncesvalles is one of Toronto's most actively renovated neighbourhoods. Gentrification has accelerated full gut renovations on the Victorian and Edwardian semis and detacheds along streets like Fern, Marion, and Wanda. But the neighbourhood's original worker cottage stock brings real basement challenges: low ceiling heights under 7 feet are the norm, rubble or stone foundations are common, and original plumbing and knob-and-tube wiring frequently need to be addressed before a proper finish can begin. Kopman Build understands these constraints and builds for them — not around them.
The Polish-heritage commercial strip along Roncesvalles Avenue has given the neighbourhood stability through multiple real estate cycles. That density of long-term ownership, combined with rapid gentrification pressure, means basement secondary suites here generate some of the strongest rental demand in the west end. We build legal suites that meet City of Toronto requirements and hold up to city inspection.
Dustin Kopman founded the company in 1999 after growing up in construction through his family's firm, G&G Enterprise. Every project is managed by someone who understands the craft — not just the sales pitch.
Full secondary suite creation compliant with Toronto zoning, Ontario Building Code, and City of Toronto Second Suite requirements — including fire separation and egress.
Finished basement family rooms, home theatres, play areas, and entertainment spaces with proper insulation and sound isolation suited to semi-detached construction.
Dedicated basement home offices with appropriate lighting, egress compliance, and electrical for modern work-from-home setups in Toronto's west-end semis.
New basement washrooms and ensuites, including rough-in plumbing, tiling, and fixture installation — including below-slab rough-ins where required.
Basement underpinning and bench-pinning to increase ceiling height in Roncesvalles's low-basement worker cottage and semi-detached stock.
Interior and exterior waterproofing, sump pits, weeping tile, and drainage solutions before finishing — particularly important in the neighbourhood's older rubble-foundation homes.
We visit your property, listen to your goals, and document the project in writing — scope, budget, and timeline.
A detailed line-item estimate with allowances and contingencies, so you know the number before committing.
We manage all permit applications, engineering consultants, and approvals — nothing falls through the cracks.
Full-time site supervision, weekly updates, and open-book cost tracking throughout the project.
Structured handover with all documentation, warranties, and a 12-month attendance window post-completion.
Basement renovations in Roncesvalles typically cost $65,000–$135,000 for a standard finish. The neighbourhood's early 20th-century worker cottages and semis often have low ceiling heights, so underpinning is common and adds $35,000–$85,000 before finishing begins. A legal secondary suite runs $85,000–$155,000+ including plumbing, fire separation, egress windows, and permit fees. We provide detailed line-item estimates before any commitment.
Many do. Roncesvalles is built predominantly on early 20th-century cottages and Victorian and Edwardian semis with original basement ceiling heights of 6–6.5 feet — below the 6.5-foot minimum recommended for habitable space and below the 6.4-foot (1.95m) requirement for a legal secondary suite. Underpinning or bench-pinning is often the right first step. We assess ceiling height and foundation conditions during the initial consultation.
Yes. Roncesvalles falls within Toronto zoning that permits secondary suites as-of-right in most residential properties. The unit must meet Toronto's Second Suite bylaw requirements: minimum ceiling height of 1.95m, egress window in sleeping areas, fire separation between units, separate or dedicated HVAC, and an accessible entrance. Kopman Build manages all permitting, inspections, and sign-offs for legal suite conversions.
A standard basement finish in Roncesvalles takes 8–14 weeks from permit approval. If underpinning is required to achieve adequate ceiling height — common in the neighbourhood's original worker cottages — add 4–8 weeks before finishing can begin. A full legal secondary suite typically takes 14–20 weeks in total. We provide a detailed schedule at the pre-construction stage.
Kopman Build delivers permitted, code-compliant basement renovations in Roncesvalles and across Toronto. No-obligation consultation.
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