Riverdale's late Victorian and Edwardian homes along the Broadview corridor — many of them semis on tight lots steps from the ravine and Withrow Park — are ideally suited to second storey additions that double living space without sacrificing the neighbourhood. Kopman Build has been building second storey additions in Toronto's east end since 1999, and we know what it takes to do this right on the city's heritage-sensitive, party-wall Victorian stock.
Riverdale homeowners adding a second storey are navigating a specific set of conditions: party-wall coordination with adjoining semi-detached owners, structural assessment of 100-year-old brick and timber frames, and City heritage guidelines that apply across large parts of the neighbourhood. Kopman Build has managed all of these on east-side Toronto projects and understands how each one affects cost, timeline, and design.
The east-side premium in Riverdale makes a well-executed second storey addition one of the strongest renovation investments in the city. Gaining 600–1,000 sq ft of above-grade space — bedrooms, bathrooms, a primary suite — on a Broadview-area Victorian adds meaningful value without incurring land transfer tax or real estate commissions on a larger purchase.
Riverdale's proximity to Withrow Park and the Don Valley ravine system means many properties also face grading and drainage considerations during foundation reinforcement. We document these from the outset and price them accurately, so there are no surprises mid-construction.
A complete new upper floor on a single-storey Riverdale home or bungalow — primary suite, additional bedrooms, and bathrooms integrated with the existing structure.
Adding an upper floor over part of the existing footprint — common on Riverdale semis where the rear of the main floor is one storey and the front is already two.
Extending an existing two-storey Victorian with a third floor where zoning and heritage guidelines permit — gaining a primary suite or flex space at the top of the home.
Foundation and wall upgrades required to carry a new storey on a 100-year-old Riverdale brick structure — assessed and priced before construction begins.
Additions designed to respect Riverdale's Victorian and Edwardian streetscapes, including setback compliance and facade treatment consistent with heritage guidelines.
Staircase relocation, main floor layout changes, and bathroom additions that typically accompany a second storey addition — handled as a single integrated scope.
We visit your Riverdale property, assess the existing structure, 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 permit applications, structural engineering, heritage review where required, and approvals — nothing falls through the cracks.
Full-time site supervision, weekly updates, and open-book cost tracking throughout — from demo to dry-in to finishes.
Structured handover with all documentation, warranties, and a 12-month attendance window post-completion.
A second storey addition on a Riverdale semi-detached or detached Victorian typically runs $350,000–$650,000+, depending on square footage, structural complexity, and finish level. Riverdale's east-side premium land values make this a strong investment relative to upsizing. Kopman Build provides a detailed line-item estimate before any commitment.
Yes, and it is one of the most common scopes we complete in the neighbourhood. Riverdale's stock of late Victorian and Edwardian semis is well suited to second storey additions. The key considerations are party-wall coordination with the adjoining owner, structural assessment of the existing foundation and walls, and heritage guidelines if the property is within a Heritage Conservation District. Kopman Build assesses all of these at the outset.
Yes. A second storey addition requires a building permit from the City of Toronto. Depending on your lot and the scope, a Committee of Adjustment minor variance application may also be required. Properties near the Broadview corridor or within a Heritage Conservation District may face additional review. Kopman Build manages the complete permit and approval process.
Expect 8–14 months from permit approval to completion. City permit review typically adds 4–8 months before construction begins. We give you a realistic total project timeline at the outset so you can plan around it.
Kopman Build builds second storey additions across Riverdale and Toronto's east end. No-obligation consultation — we come to your property.
Request a Consultation