Home Renovation Cost Estimator

Please fill in the required fields with values greater than 0.
–subtotal
–contingency
–total budget
–cost per sq ft

Enter your own quotes for materials and labor. A contingency of 10 to 20 percent covers surprises such as hidden damage.

How to use this calculator

Enter the cost of materials, labor, permits and any other costs from your quotes. Choose a contingency percentage and add the project area if you want a cost per square foot. Press Calculate to see your total renovation budget.

The formula

Subtotal = materials + labor + permits + other costs
Contingency = subtotal × contingency %
Total budget = subtotal + contingency

Example: Materials of $8,000, labor of $6,000 and permits of $500 give a subtotal of $14,500. With 15% contingency ($2,175) the total budget is $16,675, which is $83.38 per square foot for a 200 sq ft room.

How to build a realistic renovation budget

The calculator adds your quotes, then adds a contingency for surprises. The total budget is the amount you should be ready to spend, not the amount you hope to spend. The cost per square foot helps you compare quotes and check against similar projects.

A bathroom example

Say a 50 sq ft bathroom has $6,000 in materials, $7,000 in labor, $300 in permits and $700 in other costs. The subtotal is $14,000. In an older home, a 20 percent contingency adds $2,800, for a total budget of $16,800. That works out to $336 per square foot. Small rooms with plumbing, tile and fixtures often cost much more per square foot than open living areas.

What drives the cost

  • Scope: Moving plumbing, walls or windows costs far more than replacing finishes in place.
  • Finish level: Cabinets, countertops, tile and fixtures can vary several times in price for the same room.
  • Age of the home: Older homes are more likely to hide rot, outdated wiring or plumbing that must be updated.
  • Labor market: Rates vary by region and season. Busy contractors may charge more or book months out.

Tips for accurate numbers

  • Get written, itemized quotes so you can compare the same scope from each contractor.
  • Price your finishes yourself before you meet contractors. Allowances in quotes are often low.
  • Include delivery, disposal, dumpster rental and cleanup in other costs.
  • Add costs of living around the work, such as eating out during a kitchen remodel.

Common mistakes

  • Spending the contingency on upgrades before the project is finished.
  • Changing plans mid-project. Change orders often cost more than the same choice made up front.
  • Skipping permits to save money. Unpermitted work can cause problems with insurance and resale.
  • Paying most of the price before work starts.

Planning the money

Decide how you will pay before you sign a contract. Cash, a home equity loan or line of credit, and personal loans each have different costs and risks. This tool is for budgeting only and is not financial advice. Talk with a financial advisor or lender if you plan to borrow. For structural, electrical, plumbing or gas work, hire licensed contractors and follow local building codes.

Frequently asked questions

How do I estimate renovation costs?
Get written quotes for materials and labor, add permits, and keep a contingency for surprises.
How much contingency should I add?
10 to 20 percent is a common range. Use more for older homes where hidden problems are likely.
Should I get more than one quote?
Yes. Get at least three quotes from licensed contractors and compare what each one includes.
Which renovations add the most value?
Kitchen and bathroom updates, new flooring and fresh paint are popular, but the return depends on your area.
Do I need a permit?
Structural, electrical, plumbing and many other changes need permits. Check with your local building department.
What renovation costs are often forgotten?
Common misses include permits and inspections, dumpster rental, debris hauling, delivery fees and tool rental. Many people also forget paint, trim, outlets and light switches. Living costs during the work, such as eating out or a short hotel stay, can add up. Track these in the other costs field.
How much should I pay a contractor up front?
A modest deposit is common, but avoid paying most of the price before work starts. Some states limit how much a contractor can ask up front. Tie later payments to finished stages, such as rough-in, inspection and completion. Hold the final payment until the punch list is done.
How much can I save by doing some work myself?
Labor is often a large share of a renovation budget, so DIY demolition, painting or cleanup can lower costs. Be realistic about your skills and time, since mistakes cost money to fix. Leave electrical, plumbing, gas and structural work to licensed pros, and ask contractors how DIY tasks affect their quote.