Building an accessory dwelling unit (ADU) is one of the most significant investments you can make in your Ontario property. But how long it actually takes – and how smoothly the process unfolds – depends enormously on who you work with. General contractors who occasionally take on ADU projects and dedicated ADU specialists operate on very different timelines, and understanding those differences can save you months of unnecessary waiting.
Here’s a phase-by-phase look at what to expect, and where working with Pacd Homes’ ADU specialists changes the picture.
Phase 1: Initial Consultation and Property Assessment
Typical timeline: 1–2 weeks
With a general contractor, the initial consultation often means fitting your project into a generalist’s busy schedule – someone juggling commercial renovations, custom home builds, and kitchen remodels alongside your ADU inquiry. Expect slower responses, less targeted questions, and assessments that lean on what they already know rather than ADU-specific regulatory nuance.
With Pacd Homes, your complimentary consultation is led by ADU specialists who ask the right questions from day one. Your property is evaluated specifically for internal, attached, and detached ADU potential – with our team examining zoning requirements, setbacks, lot coverage, soil conditions, and municipality-specific rules that a generalist may simply not know to look for. The result: a cleaner path forward with fewer surprises downstream.
Phase 2: Design Development
General contractors: 3–12+ weeks | Pacd Homes: 2–6 weeks (depending on ADU type)
Pacd Homes draws on experience from ADU projects across Ontario municipalities. Internal conversions can reach design completion in as little as 2–4 weeks; attached and detached units typically take 3–6 weeks. The design process integrates permit requirements from the start, so what goes to the municipality is ready to be approved – not revised and resubmitted.
Phase 3: Permit Application and Municipal Approval
General contractors: variable and often protracted | Pacd Homes: streamlined, with timelines varying by municipality
This is where the gap between generalists and specialists is most pronounced. Municipal ADU permit applications require specific documentation, zoning verifications, and engineering reports that differ significantly across Ontario cities. A general contractor unfamiliar with a municipality’s ADU-specific requirements will often submit incomplete applications – triggering revision requests that can add weeks or months to the process.
Pacd Homes’ specialists navigate permit processes across Toronto, Ottawa, Mississauga, and other Ontario cities regularly. Familiarity with each municipality’s intake requirements means applications are submitted complete and correctly formatted from the outset, minimizing the back-and-forth that causes the most timeline bloat.
Phase 4: Construction – Where the Difference is Most Visible
General contractors: widely variable | Pacd Homes: 6–8 weeks post-permit
Once permits are approved, Pacd Homes gets to work and completes construction in just 6–8 weeks. That’s the headline difference. General contractors managing ADU builds alongside other projects face scheduling conflicts, trade availability issues, and workflows that simply weren’t designed for ADU-scale construction. The result is timelines that stretch unpredictably.
Pacd Homes’ ADU specialists use a streamlined building system purpose-built for accessory dwelling units. Our construction teams work efficiently to minimize disruption to your property and daily life, with a dedicated project manager keeping you updated throughout. Quality control checkpoints at every critical phase mean the build moves quickly without cutting corners.
Phase 5: Final Inspections and Occupancy
Timeline: 2–3 hours
Municipal inspectors verify code compliance and sign off on occupancy. Any deficiencies require correction and re-inspection. The number of deficiencies flagged is directly tied to construction quality throughout the build – a cleaner build means a cleaner inspection. Pacd Homes handles all final inspection coordination and documentation, and provides you with a full owner’s manual covering warranty information, maintenance schedules, and system guidelines at handover.
The Bottom Line
The most meaningful difference between working with a general contractor and working with Pacd Homes’ ADU specialists isn’t any single phase – it’s the cumulative effect of specialized expertise at every step. Streamlined design and full permit submissions get your project ready – then, once your permit is approved, your ADU is built in just 6–8 weeks.
Ready to find out what’s possible on your property? Book a complimentary consultation with Pacd Homes today.
