How Much Should You Budget for “Unexpected Surprises” During Renovation?
No matter how carefully you plan a renovation, surprises are almost guaranteed. From hidden water damage to outdated wiring, these issues often appear once walls are opened or floors are pulled up. The question is: how much should you set aside to handle the unexpected?
Most experts recommend 10% to 20% of your total renovation budget as a contingency fund. For example, if your remodel is estimated at $30,000, you should keep at least $3,000–$6,000 extra available.
Why so much? Because surprises can be costly:
Structural issues like foundation cracks or termite damage.
Plumbing and electrical upgrades needed to meet current codes.
Material price fluctuations that drive costs higher mid-project.
Design changes when you realize something works better in practice than on paper.
Planning for these bumps reduces stress. Instead of stalling your project or cutting corners you’ll have funds ready to keep work moving smoothly.
Tip: If your home is older than 30 years, lean toward the higher end (closer to 20%) since hidden issues are more common.
In short: Renovating always has surprises, but with a cushion built into your budget, they don’t have to derail your vision.