Humber Valley's 1950s and 1960s bungalows — many backing onto the Humber River ravine or sitting adjacent to the golf course — are exactly the housing stock that second storey additions are made for: generous lots, solid bones, and real upside when the project is done right. Kopman Build has been adding second storeys to Etobicoke homes since 1999, with a process built for the complexity these ravine-lot properties demand.
Humber Valley is one of Etobicoke's most sought-after neighbourhoods, and its mid-century bungalow stock presents a specific opportunity: double your liveable square footage without touching the footprint or leaving a street you genuinely want to stay on. But second storey additions on ravine-adjacent lots carry a layer of regulatory complexity that most contractors are not equipped for. Kopman Build manages every piece of it — structural engineering, TRCA consultation where required, and City of Toronto permitting — from the first site visit to the final occupancy permit.
Three things make Humber Valley second storey projects distinctive. First, the ravine proximity means TRCA jurisdiction needs to be confirmed early, even when the addition stays within the existing footprint. Second, the neighbourhood's consistent heritage character — brick-clad, low-profile, mid-century — means architectural integration matters: a second storey that reads as a mismatch will underperform on resale and draw scrutiny from planners. Third, the premium renovation market here means clients expect the project to be managed at a standard that matches the neighbourhood. That is exactly what we deliver.
Dustin Kopman founded the company in 1999 after growing up working 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.
Complete second-storey additions over the full bungalow footprint — doubling liveable area while maintaining the original home's street presence and structural integrity.
Second storeys over a portion of the existing footprint — ideal where massing or budget calls for a more targeted scope, such as adding a primary suite above the main living area.
Complete structural assessment and reinforcement of the existing first-floor framing to carry the new storey — engineered to code and built to last.
Working with architects who understand Humber Valley's mid-century character — brick profiles, rooflines, and proportions that respect the streetscape.
Full management of City of Toronto building permits and, where required, Toronto and Region Conservation Authority review for ravine-adjacent properties.
Complete interior finishing of the new storey — primary suites, bedrooms, bathrooms, and staircases — delivered to the same standard as the rest of the home.
We visit your Humber Valley property, assess the existing structure, confirm TRCA jurisdiction, 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 to anything.
We manage all City of Toronto permit applications, structural and geotechnical engineering consultants, and any TRCA submissions — nothing falls through the cracks.
Full-time site supervision, weekly client updates, and open-book cost tracking throughout the project. Your home stays liveable wherever the sequence allows.
Structured handover with all documentation, warranties, and a 12-month attendance window post-completion.
A full second storey addition on a Humber Valley bungalow typically runs $350,000–$650,000+, depending on the footprint, structural complexity, and finish level. Ravine lots and properties near the Humber River may require additional geotechnical review, which can affect the pre-construction timeline and budget. Kopman Build provides a detailed line-item estimate before any commitment.
Yes. Properties backing onto the Humber River ravine fall under Toronto and Region Conservation Authority (TRCA) jurisdiction. A second storey addition that does not expand the building footprint is generally outside the TRCA regulated area, but we confirm this for every site before permits are filed. Kopman Build manages all TRCA and City of Toronto permitting as part of our standard process.
From initial consultation through final occupancy permit, a second storey addition in Humber Valley typically takes 14–20 months. Permitting alone can take 4–8 months with the City of Toronto. Construction on site runs 8–14 months once approvals are in hand. We set a realistic full-project timeline from day one so there are no surprises.
Absolutely — and it is something we plan for deliberately. Humber Valley's mid-century housing stock has a consistent scale and material palette that neighbours and the local planning context both value. Kopman Build works with architects to design second storeys that read as part of the original home: matching brick profiles, consistent roof pitches, and proportions that respect the streetscape. The result is a home that looks like it was always meant to be two storeys.
Kopman Build builds second storey additions across Humber Valley and Etobicoke. No-obligation consultation — we come to your property.
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