Princess-Rosethorn's 1950s–1960s custom bungalows sit on some of the most generous lots in Etobicoke — the ideal foundation for a second storey addition that doubles your living space while staying rooted in one of Toronto's most coveted enclaves. Kopman Build has been executing complex additions for premium Etobicoke clients since 1999, managing every step from structural assessment and permit approval through construction and occupancy.
Princess-Rosethorn is a premium Etobicoke enclave where the housing stock — custom-built bungalows from the 1950s and 1960s on large, well-treed lots — creates ideal conditions for major second storey additions. The lots are generous enough to accommodate the structural work, and the neighbourhood's land values make investing in a full addition financially sound rather than buying into a more expensive property elsewhere.
Second storey additions on mid-century bungalows require careful structural integration. Existing foundations, load-bearing walls, and roof lines all inform the design before a single drawing is produced. Dustin Kopman founded this company in 1999 after years working in his family's construction firm, and that hands-on depth means Princess-Rosethorn clients get a builder who understands the craft — not just the contract.
Kopman Build brings three things that matter specifically in Princess-Rosethorn: deep familiarity with Etobicoke zoning and permit requirements, experience matching addition quality to the neighbourhood's existing architectural standard, and a track record of managing complex structural work on mid-century homes without surprises.
Complete second storey addition over the existing bungalow footprint — structural integration, framing, roofing, and full interior fit-out.
Adding a second storey over part of the bungalow, preserving single-storey living areas and managing roofline transitions carefully.
Pre-design evaluation of your Princess-Rosethorn bungalow's foundation, walls, and load paths to establish what the addition requires structurally.
Complete management of City of Toronto building permits, architectural drawings, engineering sign-offs, and Committee of Adjustment applications if required.
Concurrent main-floor renovation work — kitchen, bathrooms, living areas — to ensure the finished home reads as one cohesive project.
Integrated design and construction delivery — one team, one contract, one accountable point of contact from concept through completion.
We visit your Princess-Rosethorn property, assess the existing bungalow structure, and document project goals, scope, budget, and timeline in writing.
A detailed line-item estimate with allowances and contingencies, so you know the full number before committing to design or permits.
We manage all permit applications, structural engineering, architectural drawings, and any required Etobicoke zoning approvals — nothing falls through the cracks.
Full-time site supervision, weekly client updates, and open-book cost tracking throughout the addition and any concurrent renovation work.
Structured handover with all documentation, warranties, and a 12-month attendance window post-completion.
A full second storey addition on a Princess-Rosethorn bungalow typically runs $350,000–$650,000+, depending on the footprint, structural scope, and finish level. The neighbourhood's premium Etobicoke location and the quality expectations of surrounding homes often support upper-range finishes. Kopman Build provides a detailed pre-construction estimate before any commitment is made.
Most do, but the existing structure must be assessed before design begins. The custom-built bungalows on generous Princess-Rosethorn lots were built to higher standards than production housing of the same era, which is an advantage — but foundations, wall framing, and load paths still require engineering review. Kopman Build conducts a thorough structural assessment as part of every pre-construction process.
A second storey addition in Princess-Rosethorn requires a building permit from the City of Toronto, full architectural and structural drawings, and a site plan. Depending on how the finished structure relates to Etobicoke zoning bylaws — particularly height and lot coverage limits — a minor variance through the Committee of Adjustment may also be required. Kopman Build manages the complete permit and approval process from application through occupancy.
From initial consultation to occupancy, expect 14–20 months in total. Permitting typically takes 4–8 months; construction itself runs 8–14 months depending on scope. Kopman Build provides a realistic project schedule at the outset and tracks against it throughout construction with weekly client updates.
Kopman Build builds second storey additions on Etobicoke bungalows. No-obligation consultation — we come to your property.
Request a Consultation