Free 2026 home renovation estimator

Home Renovation Cost Calculator

Estimate a realistic low-to-high renovation budget before you call contractors. Pick the project, enter a rough size, adjust for local pricing context, then open the matching HammerIO calculator or city cost guide for deeper scope checks.

Quick answer

Use this calculator for the first range, then verify the written scope.

For early 2026 planning, price the project by scope and size, then check whether the contractor bid includes demolition, prep, permits, disposal, material grade, warranty, and change-order rules. A useful estimate is the starting point for apples-to-apples bids, not a substitute for a site visit.

Calculator finder

Find the Right Home Improvement Calculator

Pick the project, enter a rough size, and HammerIO routes you to the calculator or cost guide that matches the scope. Use this as a first-pass screen before you ask contractors for written bids.

Measured in sq ft of wall area

Quick planning range

Interior painting

Good first estimate for rooms, apartments, and whole-house repainting.

Estimated Range

$1,800 - $6,600

Typical planning midpoint: $3,300

Scope to verify before bids

  • -wall repair
  • -ceiling height
  • -primer
  • -trim and doors

Fast 2026 Home Renovation Cost Ranges

These are planning ranges for common renovation and home improvement jobs. Open the matching guide to see labor split, ROI, timeline, permit notes, and what to verify before comparing contractor quotes.

ProjectLowTypicalHighROI
Interior Painting

2-5 days - Easy

$1,000$4,000$12,000107%
Bathroom Remodel

2-4 weeks - Medium

$6,000$18,000$50,00068%
Roof Replacement

2-5 days - Hard

$8,000$18,000$45,00068%
Deck Addition

1-3 weeks - Hard

$7,000$20,000$55,00065%
Kitchen Remodel

4-8 weeks - Hard

$15,000$42,000$100,00072%
Garage Build (New Construction)

6-10 weeks - Hard

$22,000$48,000$95,00075%

How to Use the Estimate

Treat the result as a bid-prep range. If a contractor quote lands far above the high end, ask what scope item is driving the premium: access, demolition, disposal, permits, hidden damage, custom material, or schedule pressure.

If a quote lands far below the low end, check for missing line items such as prep work, disposal, primer, underlayment, flashing, permits, insurance, or cleanup. The lowest bid is only useful when the written scope matches.

For deeper planning, use the 120+ project cost guide, compare construction costs by state, or open all HammerIO calculators.

Home Improvement Cost FAQ

What is the fastest way to estimate a renovation budget?

Start with the closest project type, enter the rough size, then compare the low, typical, and high range against local labor context. Use the result as a bid-prep range and add contingency for permits, demolition, hidden damage, material upgrades, and schedule pressure.

Which calculator should I use before calling contractors?

Use the home improvement cost calculator for the first project range, a material calculator for measurable quantities, a local construction page for city context, and the contractor bid comparison calculator after you have written quotes.

Should I trust a quote below the calculator range?

Only after checking scope. A quote below the planning range may exclude prep work, demolition, disposal, permits, underlayment, flashing, warranty, cleanup, or change-order pricing. Ask the contractor to itemize those assumptions before accepting.

Why does the same project cost more in one city than another?

Labor rates, material delivery, permit fees, inspection delays, climate requirements, contractor availability, and disposal costs vary by market. Local context matters most for roof replacements, additions, garages, kitchens, bathrooms, concrete, and exterior work.