How to Budget for a Renovation
Properly (Ottawa Edition)

I sat at a kitchen table in Alta Vista last month with a couple holding a printout from an online renovation cost calculator. Their number was a fraction of what a full kitchen gut would actually take, once we walked the space. They weren't being unreasonable. They were being lied to by a calculator that had no idea their floor joists were 2x8 spruce on 16-inch centres or that their panel was 100 amp and full. A real number comes from a walkthrough and a written breakdown, not a generic estimator.

A renovation budget done right is not one number. It is a stack of numbers, each with a job. After 20 years building in Ottawa, here is the framework I walk every client through before we sign anything.

The 60/30/10 Split (and Why It Holds)

For a typical residential renovation in Ottawa, the construction cost breaks down close to this:

• Labour: 60%. Carpenters, plumbers, electricians, drywallers, tilers, painters. In a hot Ottawa market with a labour shortage, this slice is the one inflating fastest.
• Materials: 30%. Cabinets, counters, tile, flooring, fixtures, lumber, drywall. Note: cabinets alone can eat 12-18% of the full project on a kitchen.
• Contingency: 10%. Held in reserve for the unknown. On a 1960s home in Manor Park, you will spend it. On a 2015 build in Findlay Creek, you might not. Hold it anyway. What pushes any of these slices up is finish level, layout changes, and site conditions, not the calculator's guess.

This split assumes a fixed-price contract on a standard scope. If your project is a deep gut on a pre-1970 home, swing the contingency to 15%. If you are renovating a condo in Centretown where everything has to ride a freight elevator, swing it to 12%.

The 10% contingency is not a slush fund for upgrades. It is the line you do not touch unless the wall opens up and shows you something you did not plan for.

Soft Costs (the Quiet Budget Killers)

Soft costs are everything that is not hammers and lumber. Most homeowners forget them because no contractor has them on a quote. They run 8-15% on top of construction and they are non-negotiable.

Here is what a typical Ottawa mid-size renovation actually pays in soft costs:

• Designer fees: plans, elevations, and cabinet specs on a kitchen or main-floor reno. More if it is full-home. Priced to scope and given as a written proposal.
• BCIN-stamped construction drawings: if your project needs a permit. Required for additions, structural changes, basement legalizations.
• Structural engineer: a beam calculation and stamped letter. Required any time you remove a load-bearing wall.
• City of Ottawa permit fees: the City permit minimum is $117, scaling up with construction value for kitchens, bathrooms, and additions. Submitted through MyServiceOttawa.
• ESA (Electrical Safety Authority): a separate statutory electrical permit fee, distinct from the City permit.
• TSSA (gas): a statutory permit fee if you are moving a gas line for a range, dryer, or fireplace.
• Site survey or stake-out: if you are building an addition close to a setback line.
• Temporary accommodation: if the project is big enough to push you out (full kitchen plus bathroom plus laundry), budget for a short-term rental.
• Storage: a monthly unit if your living room becomes a staging area.

Add it up: on a mid-size kitchen renovation in Westboro, the soft costs alone can move the all-in number meaningfully before a single nail goes in. Get them itemized in writing up front.

The Three-Number Method

Every client gets three numbers from me on day one. Most arrive thinking they have one.

1. Comfortable number. The amount you can spend without checking the bank balance every week. This is what your kitchen should actually cost.
2. Stretch number. Comfortable plus 12-15%. The number you hit if you upgrade the counter, add the second sink, or pick the higher-priced porcelain over the standard tile.
3. Hard ceiling. The number above which you stop the project, even if the wall is open. This is the line your contractor needs to know about.

Tell your contractor all three. A good one will design to your comfortable number, leave you headroom toward stretch, and never quote you above the ceiling. A bad one will design to the ceiling and call every overage a "change order."

When You Need a Finance Buffer (and How Big)

If you are paying cash, your buffer is your contingency, full stop. If you are using a HELOC, refinance, or RBC home equity line, you need a separate finance buffer on top.

Why: most banks will not advance the full HELOC limit on day one. They draw it down in stages tied to project milestones. If your final invoice lands two weeks before your next draw, you need the cash to cover it without dipping into next month's mortgage.

Rule of thumb: have 60 days of mortgage and renovation cash flow available outside the financing. On a larger Orleans bungalow renovation, that buffer is a meaningful share of the project sitting in chequing. Not glamorous, but it is the difference between a smooth final month and a frantic one.

For Ottawa homeowners weighing options, our deep dive on renovation financing walks through HELOC vs refinance vs Purchase Plus Improvements vs builder financing, with real interest spreads from the 2026 Ottawa market.

Where Budgets Quietly Inflate (The Real Cost Drivers)

Six places I see budgets balloon in Ottawa, in order of frequency:

1. Cabinet upgrades. "Just the inset doors." Then "just the painted finish." Inset, painted, custom on a 14-cabinet kitchen is one of the biggest swings over a standard box-and-door spec. Lock the cabinet level before you sign.
2. Counter material change. Quartz to natural marble, marble to Calacatta. Each step up the stone tier moves the number, and the rarer the slab the larger the jump.
3. Hidden electrical. Old aluminum wiring discovered behind a wall on a 1970s Glebe semi. Remediation before drywall closes back up is unplanned scope that the contingency is there for.
4. Subfloor. Lifting old vinyl in a Sandy Hill kitchen and finding the subfloor rotted under the dishwasher. Replacing it before tile is a common surprise on older homes.
5. HVAC re-runs. An open-concept conversion in a Hintonburg century home where the existing ducts no longer line up adds rework you cannot see until the walls open.
6. Drywall scope creep. "While you're here, can you do the hallway?" Each "while you're here" adds labour and material that was never in the original scope.

The Quote vs. the Budget (They Are Not the Same)

A quote is what your contractor charges you for the defined scope of work. A budget is everything you spend to actually get the project done and the family living back to normal. The quote is the biggest line in the budget but it is not the only line.

Your full budget includes:

• Construction quote (signed contract amount)
• Soft costs (permits, designer, engineer, ESA, TSSA)
• Owner-supplied items (appliances, light fixtures, mirrors, accessories, plants)
• Contingency (10-15% of construction)
• Finance buffer (60 days cash flow)
• Furniture/decor/window treatments after

The kitchen quote is rarely the whole project. By the time the new dishwasher, the bar stools, the pendant lights, the permit, and the engineer's letter all land, the all-in number is well above the contract amount. That is normal. The mistake is being surprised by it.

The Short Version

A renovation budget is six numbers, not one: construction quote, soft costs, owner-supplied items, contingency, finance buffer, after-build furnishings. Run the 60/30/10 split inside the construction quote. Carry 10-15% contingency outside it. Know your three numbers, comfortable, stretch, and ceiling, and tell your contractor all three.

The Ottawa homeowners I see finish on budget all do the same thing: they build the budget before they fall in love with the kitchen. The ones who go over do it the other way around.

If you want a real number for your space before you sign anything, that is what our free 48-hour feasibility review is for. Call 613-862-4555 or book a walkthrough through our contact page.