Budget & financing.

As a 2026 guide, custom construction in Ottawa typically runs about $300 to $450 per square foot for standard-to-premium builds, and roughly $500 per square foot and up for luxury finishes — fully bespoke projects can exceed $1,000 per square foot. These figures exclude land, and soft costs (design, engineering, permits, surveys, financing) add roughly $25 to $55 per square foot. Every project is unique, so we budget yours specifically rather than rely on an average.

The size and complexity of the design, the level of finish, the site itself (slope, soil, servicing, access), the structural and mechanical systems, and market conditions for materials and trades. Custom millwork, glazing, stone and specialty systems move the number most — the lot and finish level usually matter more than square footage alone.

Into hard costs (the physical construction — trades, materials, equipment) and soft costs (design, engineering, permits, surveys, legal, financing, insurance), plus a contingency. An open-book budget shows each line item transparently, so you can see exactly where money is committed.

A contingency of roughly 10 to 15 percent is prudent on a custom build, and more on a difficult site or an extensive renovation. It absorbs the unforeseen — rock in excavation, design refinements, allowance adjustments — without derailing the project, and disciplined cost control keeps it from being spent unnecessarily.

An allowance is a placeholder budget for an item not yet selected, such as a set amount for plumbing fixtures. Your final cost rises or falls as real selections come in above or below the allowance. Realistic allowances set up front prevent surprises later; we set them from actual pricing, not optimistic guesses.

A construction loan advances funds in stages, or draws, as the build reaches defined milestones — foundation, framing, lock-up, completion — each usually confirmed by an inspection or appraisal before release. You generally pay interest only on funds drawn, and the loan converts to a regular mortgage at completion. We coordinate documentation and timing with your lender.

Under the open-book agency model you contract directly with each trade and pay their invoices as work is completed, with the practice fee billed transparently — there is no large lump-sum margin to a contractor. Supplier deposits (for windows, cabinetry and the like) are scheduled to their lead times and shown in the budget.

A fixed price looks reassuring but hides the margin, contingency and assumptions inside one number, and changes are renegotiated from a weak position. Open-book shows every cost, tenders each scope competitively, and requires your approval before commitments — so you control the budget rather than discover it. It is the model we are built on.

Resolve the design before tendering, tender each scope competitively on a defined basis, set realistic allowances and contingency, and govern every change in writing. Most overruns trace back to incomplete drawings and undisciplined changes — both are controllable with the right process.

Property taxes, insurance, utilities, and routine maintenance with reserves for major systems. A high-performance, energy-efficient home lowers the utility line meaningfully over its life, which is part of the value case for building efficiently from the start.

Income properties can use construction financing and, on completion, purpose-built rental mortgages — notably CMHC's MLI Select, which rewards energy-efficient, affordable or accessible rentals with higher leverage and longer amortizations. Building to a strong energy standard can improve both the financing terms and the long-term returns.