Clients planning their first custom build almost always underestimate the design and permitting phase, and overestimate how long actual construction takes once it begins. Here's a realistic stage-by-stage timeline based on the projects we've delivered across Ottawa.
Stage 1 — Discovery & Design (3 to 6 months)
Site analysis, programming, schematic design, and design development. This stage moves at the pace of decision-making, not construction — the more clarity a client brings on how they actually want to live, the faster it moves. Rushing this stage is the single most common cause of expensive change orders later.
Stage 2 — Permitting & Engineering (2 to 4 months)
Structural engineering, mechanical drawings, and municipal permit review run in this window. Ottawa's permitting timelines vary by ward and project complexity — heritage districts and tree-protection zones add review time. Submitting a complete, well-coordinated drawing set the first time is the best lever a builder has over this stage's length.
Stage 3 — Site Prep & Foundation (4 to 8 weeks)
Excavation, footings, foundation walls, waterproofing, and backfill. Weather and soil conditions are the main variables — a waterfront or ravine lot, like our Grandview Road build, can extend this stage meaningfully.
Stage 4 — Framing & Envelope (2 to 4 months)
Structural framing, roofing, windows, and exterior cladding. This is the stage where a project starts to visually read as a house, and where architectural complexity — rooflines, glazing, structural steel — most directly affects schedule.
Stage 5 — Mechanical, Electrical & Insulation (1 to 2 months)
HVAC, plumbing rough-in, electrical rough-in, and insulation, followed by a municipal inspection before drywall closes the walls. This is the last point to make structural or layout changes without real cost.
Stage 6 — Interior Finishing (3 to 5 months)
Drywall, millwork, flooring, cabinetry, countertops, tile, and trim. This stage carries the widest timeline variance of the entire build, almost entirely driven by how far in advance finishes were selected and ordered. Custom millwork and imported stone in particular can have long lead times — selecting them during Stage 1 rather than Stage 6 is the single biggest schedule protector we recommend.
Stage 7 — Final Walkthrough & Move-In (2 to 4 weeks)
Deficiency review, final inspections, landscaping, and closing. We treat this as a final quality pass, not a handoff — we don't consider a project complete until it exceeds what was promised at the start.
Realistic Total: 12 to 20 Months
From first design meeting to move-in, most fully custom Ottawa homes land in the 12 to 20 month range, with architectural complexity and lot conditions as the primary variables. Anyone quoting significantly faster for a comparable scope is usually compressing the design phase — which tends to cost more in change orders than it saves in time.