Renovation Budget Basics
A renovation budget is more than a contractor's quote. A useful budget accounts for the work you want, the work you cannot yet see, permits, tax, temporary living arrangements and changes along the way.
1. Define the project before asking for prices
Write down what must change, what would be nice to change and what must stay untouched. Identify the rooms, approximate dimensions, finishes, fixtures and performance requirements. Separate essential repairs (such as leaks or unsafe conditions) from cosmetic upgrades.
- Must-have: work required for safety, function or to solve an existing problem.
- Nice-to-have: finishes and upgrades you can postpone if the budget tightens.
- Excluded: work that is specifically not included in the current project.
Clear scope makes contractor quotes easier to compare and reduces the risk of paying for misunderstandings.
2. Build a line-by-line budget
Break the project into categories instead of relying on one round number. Common categories include:
| Category | Examples |
|---|---|
| Planning and approvals | Drawings, design, permit fees, required assessments |
| Preparation and demolition | Protection, waste bins, disposal, hazardous-material assessment where appropriate |
| Construction and trades | Carpentry, plumbing, electrical, HVAC, insulation, drywall |
| Materials and finishes | Flooring, cabinets, tile, paint, fixtures and delivery |
| Other costs | Applicable taxes (GST/HST, plus provincial sales tax where it applies), storage, temporary kitchen or accommodation, cleanup |
| Contingency | Reserve for unknown conditions and approved changes |
3. Plan a contingency, not just an optimistic total
A planning allowance of roughly 10–20% is often used as an initial starting point, but it is not a guaranteed sufficient amount. Older homes, hidden plumbing or structural issues, and major demolition can require a larger reserve. Discuss the actual risk with your contractor or designer.
Illustrative example: If your estimated renovation work is $20,000, a 15% contingency is $3,000, making the working budget $23,000 before any costs or taxes not already included. The percentage is a budgeting assumption, not a quote or a prediction.
4. Compare quotes on the same scope
Ask bidders to price the same written scope and specifications. Check whether demolition, disposal, material allowances, permit coordination, taxes, site protection and cleanup are included. A low quote can become expensive if important work is excluded.
- Request itemized written estimates where practical.
- Mark inclusions, exclusions and allowances.
- Confirm who supplies materials and handles permits.
- Ask how unforeseen conditions and change orders will be priced.
- Confirm payment milestones and the expected schedule in writing.
5. Track committed, paid and remaining costs
Keep three separate figures: committed (approved contracts and changes), paid (money already spent), and forecast (expected total at completion). Update your records whenever a change is approved. Never treat unspent contingency as money available for upgrades until major unknowns have been resolved.
Questions homeowners ask
Should I get more than one quote?
For substantial projects, comparing multiple qualified contractors can help you understand scope, approach and price differences. Compare equivalent specifications, not just totals.
Does the lowest quote save the most money?
Not necessarily. Missing work, low allowances or unclear exclusions can increase the final cost. Consider credentials, scope, quality and communication as well as price.
Do I need to budget for permits?
Possibly. Requirements depend on the work and municipality. Ask your local building department and confirm who is responsible for obtaining approvals.
Keep planning
Explore another guide or use QcorHome's free homeowner checklists to organize the next steps.
Educational disclaimer: This content is not a substitute for site-specific engineering, architectural, building-code, legal or other professional advice. Verify permits and requirements with your local authority, and use qualified professionals for regulated or safety-critical work.