Whole-House Renovation Cost Calculator

How much to renovate a house? Enter the floor area and the $/sq ft band that matches your scope, and this tool turns them into a planning total — on your figures, never a hidden price list.

Planning estimate: this is a planning estimate from the numbers you enter and standard reference quantities — not a bid or a contract. Get itemized written quotes from licensed contractors and confirm measurements before you commit.
Licensed pros & permits: Structural, electrical, plumbing and gas work must be done by licensed professionals and usually needs a building permit and inspection. Confirm scope, permits and code with your local building department before you start.

Calculator

sq ft
Livable area you are renovating (exclude unfinished basement/garage unless included in scope).
$/sq ft
Light refresh, mid remodel or full gut — enter the band that fits your project and quotes.
$
Add high-cost rooms (kitchen, baths) you priced separately, if not already in the $/sq ft.
Estimated total$135,000.00
Area × $/sq ft band$135,000.00 (1,800 sq ft × $75.00)
Extra room roll-up (yours)$0.00

A 1,800 sq ft renovation at $75.00/sq ft is ≈ $135,000.00. Enter the $/sq ft band that matches your scope (light, mid or full gut). Structural/MEP work needs licensed pros and permits.

Formula

The whole-house estimate is an area × unit-cost band, plus anything you priced by the room:

total = area (sq ft) × your $/sq ft + optional room roll-up ($)

The $/sq ft band is the whole variable, and it is yours: a light cosmetic refresh, a mid-level remodel and a full down-to-studs gut sit on very different bands. Enter the number that matches your scope and your written quotes — the calculator holds no price table, so it never goes stale.

  • Light / cosmetic: paint, flooring, fixtures, minor updates — the lowest $/sq ft.
  • Mid remodel: kitchen & bath updates, some layout changes, new finishes throughout.
  • Full / gut: down-to-studs, new systems and layout — the highest band (see the gut renovation tool).

Worked example

Say you are renovating an 1,800 sq ft house at a mid-level band of $75/sq ft, with no rooms priced separately:

1,800 × $75 = $135,000

That is your planning number: ≈ $135,000. Change the band to $50/sq ft (a lighter scope) and the same house is ≈ $90,000; push it to $150/sq ft (a full gut with high-end finishes) and it is ≈ $270,000. The point of the tool is to make the band visible — that single choice drives the estimate more than anything else. If you priced a $30,000 kitchen on its own quote and left it out of the $/sq ft, add it in the room roll-up field so it is not double-counted.

Reading a whole-house number

A single "cost to renovate a house" figure is only ever a starting point. Two houses of the same size can differ by a factor of three depending on finish level, structural work, mechanical upgrades and local labor. That is exactly why this tool asks you for the $/sq ft: the honest version of the calculation is "your area at the band your quotes support", not a number pulled from a national average that is out of date the day it is published.

Use the cost per square foot normalizer to reverse-engineer a $/sq ft from any contractor quote, then feed it back here to sanity-check a larger or smaller version of the same project. For the buffer you should always carry on top of the estimate, see the contingency planner; to split the total across rooms and trades, use the budget allocator.

Because a whole-house renovation almost always touches structure, electrical, plumbing and sometimes gas, treat the output as a budget, not a bid: get itemized written quotes, use licensed professionals, and confirm permits and code with your local building department.

Frequently asked questions

How much does it cost to renovate a whole house?
It depends almost entirely on the $/sq ft band your scope calls for. A light refresh, a mid-level remodel and a full gut can differ by three times or more for the same square footage. This calculator multiplies your floor area by the band you enter from your own quotes, so the estimate reflects your project rather than a national average that ages.
What $/sq ft should I use?
Use the figure your written quotes support, or reverse it from a real quote with the cost per square foot tool. As a rough map: a light cosmetic refresh sits at the low end, a mid remodel with kitchen and bath work in the middle, and a full down-to-studs gut at the high end. The band is the biggest single driver, so enter it deliberately.
Does this include a kitchen and bathrooms?
If your $/sq ft band already reflects a whole-house scope, the kitchen and baths are included in the area term. If you instead priced those rooms on separate quotes, leave them out of the $/sq ft and add them in the "room roll-up" field so they are counted once, not twice.
How much contingency should I add?
Carry a buffer on top of the estimate — commonly 10–20%, leaning higher for older homes and gut jobs. Run the total through the contingency planner to add it, and remember whole-house work needs licensed pros and permits for structural, electrical, plumbing and gas.
Is this a bid or a quote?
No. It is a planning estimate built from the numbers you enter and simple arithmetic. Get itemized written quotes from licensed contractors and confirm measurements before you commit to anything.

Related calculators

Renovation Cost per Sq FtTurn any renovation quote or budget into a cost per square foot — total divided by floor area — and convert a $/sq ft band back into a project total.Gut Renovation CostEstimate a gut, down-to-studs renovation cost from your floor area and a higher $/sq ft band, plus roof, HVAC, electrical and plumbing add-ons.Room-by-Room BudgetRoll up your kitchen, bath, flooring and other room budgets into one whole-house total, then add the contingency buffer percentage you choose.Contingency PlannerAdd a contingency buffer to your renovation subtotal. Pick 10, 15 or 20 percent and see the buffer dollars and the total you should actually budget.Room Addition CostEstimate a room addition cost per square foot from the footprint and the price per square foot you enter, plus line add-ons. Formula, worked example and FAQ.