---
title: "What is the 30% rule for remodeling?"
description: "The 30% remodeling rule is an informal guideline about renovation spend versus home value or contingency budgeting, not a universal law."
---
# What is the 30% rule for remodeling?

The “30% rule” is an informal remodeling guideline, not a universal building code or financial law. In some contexts, it means homeowners should avoid spending more than about 30% of a property’s value on a single renovation, especially when resale value is important. For example, a homeowner with a $400,000 property might use $120,000 as a rough upper reference point, though the appropriate amount depends on the neighborhood and project.

People also use “30% rule” to describe budgeting practices, such as reserving approximately 30% for unexpected costs. Neither interpretation should replace a project specific budget, appraisal, contractor estimates, financing review, or local market analysis.

*Cluster: Remodeling Basics (remodeling-basics)*