Hiring & planning · Updated November 2026
Hidden Project Costs: What to Include Beyond the Contractor's Base Price
The contractor's price is rarely the whole cost of a project. Adding these items to your budget up front keeps a good quote from turning into a stressful one.
Costs that may not be in the base price
| Item | Typical cost or range | Notes |
|---|---|---|
| Permits | Bathroom $100–$1,000; kitchen $460–$2,770; roof $100–$1,400 | Ask who pulls and pays |
| Demolition and disposal | Full bath demolition $1,000–$3,000; roof disposal $500–$1,500 | Often an add-on |
| Repairs found during work | Subfloor $3–$10 per sq. ft.; roof decking priced per sheet | Ask for unit prices in the contract |
| Electrical upgrades | Panel upgrade $520–$2,000 | Needed for new circuits or appliances |
| Plumbing or gas changes | Moving a gas line $375–$750 | Layout changes add more |
| Design or engineering | Structural engineer $230–$3,800 | For structural changes or foundation work |
| Your own selections | Varies | Fixtures, tile or appliances you buy beyond allowances |
From our bathroom, kitchen, roofing, flooring and foundation cost guides.
Costs outside the contract
- Eating out or a temporary kitchen during a kitchen remodel.
- A hotel or staying elsewhere if the home is unlivable for a time.
- Moving and storing furniture.
- Pet boarding.
- Repainting or patching rooms next to the work area.
- Landscaping repair after heavy equipment, or sewer and drainage work ($1–$25 per sq. ft. for restoration).
- Cleaning after the project.
- Financing costs, if you are borrowing.
Build in a contingency
Many homeowners set aside 10%–20% of the project budget for surprises, more for older homes and projects that open walls, floors or roofs. If you do not use it, it covers upgrades or the next project.
Plan the rest with our remodeling timeline and prep checklist, and handle surprises with change orders.