Planning calculator

Home Renovation Cost Calculator

Build an editable renovation budget from floor area, rooms, local pricing, and contingency. Switch between US customary and metric units, adjust the assumptions, and keep every step visible.

01 Measure02 Allow03 Order

Project inputs

Use one unit system throughout. Defaults show a realistic example; replace them with measurements from your project.

Unit system

CurrencyPlanning default — verify the selected product or project specification.Renovated floor areaExample input — replace with your project value.ft²General work rateEnter a local planning rate for demolition, finishes, labor, and general work.per ft²KitchensExample input — replace with your project value.Budget per kitchenPlanning default — verify the selected product or project specification.currencyBathroomsExample input — replace with your project value.Budget per bathroomPlanning default — verify the selected product or project specification.currencyOther fixed costsPlanning default — verify the selected product or project specification.currencyLocation / complexity factorPlanning default — verify the selected product or project specification.ContingencyPlanning default — verify the selected product or project specification.%

Measure the finished shape. This is an early planning model, not a contractor quote. Use local rates and separate structural, permit, design, temporary housing, finance, and tax costs where they apply.

Estimate matches the inputs shown.

ReviewedNovember 2, 2026

ByBuildGauge Editorial Team

ScopeFormula, defaults & sources

Report an issue ↗

The calculation

A visible formula, not a black box.

Budget range · Mathematical derivationbudget = (area × general rate + room budgets + fixed costs) × location factor × (1 + contingency)

Inputs are converted to a common base unit before calculation. Purchase quantities are rounded only at the final buying boundary.

Example inputDefaultStatus

CurrencyUSD Planning default — verify

Renovated floor area1500 ft²Replace with measurement

General work rate45 per ft²Planning default — verify

Kitchens1 Planning default — verify

Budget per kitchen25000 currencyPlanning default — verify

Bathrooms2 Planning default — verify

Budget per bathroom12000 currencyPlanning default — verify

Other fixed costs5000 currencyPlanning default — verify

Location / complexity factor1 Planning default — verify

Contingency15 %Planning default — verify

Worked example

Example: an early 1,500 ft² scope

Using the editable sample rates, room budgets, and 15% contingency produces a planning total around $139,800—not a contractor quote.

Use this to understand the workflow—not as a recommendation for your project.

Sources & scope

What supports this calculation.

Government guidanceHUD rehabilitation cost-estimation guidance ↗

Reliable rehabilitation estimates require a defined scope and project-specific costs; BuildGauge's rates are editable planning defaults, not market quotes.

Common mistakes

Check the job, not just the number.

01Leaving the example renovation cost inputs unchanged instead of entering measured project values.
02Treating an editable coverage, size, density, or allowance as universal instead of checking local quotes, permits, and a defined scope.
03Ordering from the rounded result without reviewing exclusions: This is an early planning model, not a contractor quote. Use local rates and separate structural, permit, design, temporary housing, finance, and tax costs where they apply.

Questions, answered

Renovation cost FAQ

What does the Home Renovation Cost Calculator estimate?

Build an editable renovation budget from floor area, rooms, local pricing, and contingency. The primary output is budget range, with the intermediate assumptions kept visible.

How is the renovation cost result calculated?

The visible formula is: budget = (area × general rate + room budgets + fixed costs) × location factor × (1 + contingency). Inputs are converted to a common base unit before the final purchase boundary is rounded.

Are the default values recommendations?

No. Dimensions are worked examples and product-dependent presets are planning defaults. Replace them with local quotes, permits, and a defined scope.

Is the result ready to order from?

Use it as a checked planning estimate, then confirm packaging, minimum orders, installation instructions, site conditions, and any code or professional-design requirements.

Project notes

Measure, adjust, and verify.

Details specific to renovation cost planning.

How to measure

Define the renovation area and room count only after writing a scope that separates demolition, finishes, kitchens, bathrooms, systems, structural work, design, permits, taxes, and owner-supplied items.

What the result includes

The planning model combines an editable area rate, room budgets, other fixed costs, a location or complexity factor, and contingency. It also displays a broad early range for scenario planning.

When to adjust allowance

Replace every sample amount with current local quotes or estimator input. Increase uncertainty when drawings, investigations, access, phasing, or product selections are incomplete; reduce it only as the scope becomes defined.

Limitations

This is not a market-price database, bid, appraisal, lending estimate, or contractor quote. Hidden conditions, escalation, finance, temporary housing, professional fees, and taxes must be added when applicable.