What should go in a renovation budget spreadsheet so I don't miss anything?

A comprehensive renovation budget spreadsheet should capture every possible cost category to prevent surprise expenses that can derail your project. Most New Brunswick homeowners underestimate their total costs by 20-30%, so detailed planning upfront saves significant stress later.

Start with your major cost categories: materials, labour, permits, and professional services. For materials, break down each room or area separately — flooring, paint, fixtures, trim, hardware. Labour costs in New Brunswick typically run $45-85 per hour for skilled trades, with electricians and plumbers at the higher end. Don't forget permit fees, which range from $500 for minor renovations to $8,000+ for major additions depending on your municipality or Regional Service Commission.

Professional services often get overlooked but are essential for larger projects. Budget for architectural drawings ($2,000-8,000), structural engineering if needed ($1,500-4,000), and required inspections. In New Brunswick, you'll need TIS inspections for electrical, plumbing, and gas work, plus municipal building inspections. Factor in survey costs if you're adding square footage or approaching property lines.

Create a detailed contingency structure rather than just adding 10% to everything. Set aside 15-20% for structural surprises (very common in older NB homes), 10% for permit delays or scope changes, and 5% for material price fluctuations. If you're renovating a pre-1980 home, add an extra 10% contingency for potential asbestos or lead paint remediation — both are common in New Brunswick's older housing stock.

Include often-forgotten costs like temporary living arrangements if your kitchen or bathroom will be out of service, storage rental for furniture and belongings, utility connections or upgrades, and cleanup/disposal fees. Dumpster rental runs $400-800 per week in most NB communities. If you're in a rural area served by a Regional Service Commission, factor in potentially higher material delivery costs.

Track financing costs separately — renovation loans, line of credit interest, or credit card fees if you're managing cash flow. Also budget for insurance premium increases once your renovation is complete, as your home's value will increase.

Add seasonal considerations specific to New Brunswick's climate. If your project spans winter months, budget for heated enclosures for concrete work, potential weather delays, and higher heating costs with compromised building envelope. Spring projects may face material delivery delays due to road restrictions during frost heave season.

Your next step: Create categories for each trade, list every material down to screws and caulking, and get three quotes for major items. Build in regular budget review meetings if you're using a general contractor, and always get written change orders before approving additional work.

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