Room-by-Room Renovation Budget Roll-Up

Build a whole-house budget from the bottom up: enter what each room and category costs, add a contingency, and see the planned total — all on your own figures.

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

$
Your kitchen line from a quote or the kitchen remodel tool.
$
All bathrooms combined.
$
Whole-house flooring material and install.
$
Painting, trim, bedrooms, exterior — anything not above.
A buffer for surprises — higher for older homes and gut jobs.
Estimated total$46,000.00
Rooms subtotal$40,000.00
Kitchen + bath$32,000.00
Contingency15% ($6,000.00)

Your room budgets add up to $40,000.00; with a 15% contingency the whole-house plan is about $46,000.00.

Formula

Add the rooms and categories, then apply a contingency buffer on top:

subtotal = kitchen + bath + flooring + other

total = subtotal × (1 + contingency%)

This is the bottom-up counterpart to the area × $/sq ft approach. Instead of one blended rate, you price each room or category from your own quotes and stack them, then protect the plan with a buffer for the surprises every renovation finds.

Worked example

With a $20,000 kitchen, $12,000 of bathrooms and $8,000 of flooring, at a standard 15% contingency:

subtotal = $20,000 + $12,000 + $8,000 = $40,000

total = $40,000 × 1.15 = $46,000

So the whole-house plan is $46,000, of which $6,000 is the buffer. Add painting and bedrooms in the "other" field to grow the subtotal, or step the contingency up to 20% for an older home — the total updates with your inputs.

Bottom-up vs top-down budgeting

There are two honest ways to budget a renovation, and using both is the best sanity check. Top-down starts from a $/sq ft band (the whole-house renovation cost tool); bottom-up, this tool, stacks real per-room numbers. When the two land close together, you can trust the plan; when they diverge, one of your assumptions needs another look — usually the $/sq ft band or a missing room.

Price each room with the dedicated tools and drop the results in here: the kitchen remodel and bathroom remodel estimators, and the flooring cost tool. Then split or re-check the total with the budget allocator, and size the buffer deliberately with the contingency planner.

Whole-house scope generally involves structural, electrical and plumbing work, so keep the roll-up framed as a planning estimate: confirm each line with itemized written quotes, and use licensed pros and permits where the trades require them.

Frequently asked questions

How do I build a whole-house renovation budget?
Price each room and category from your own quotes — kitchen, bathrooms, flooring and everything else — add them into a subtotal, then apply a contingency buffer on top. This tool does exactly that and shows both the subtotal and the buffered total.
What contingency percentage should I use?
A 10–20% buffer is common, leaning toward the higher end for older homes and gut jobs where surprises are more likely. Pick the band that matches your risk; the contingency planner explains the trade-off in more detail.
Where do I get the number for each room?
Use your contractor quotes, or the per-room calculators on this site: the kitchen and bathroom remodel tools and the flooring cost tool. Put anything else — painting, trim, bedrooms, exterior — in the "other" field.
How does this differ from the cost-per-square-foot approach?
This is bottom-up: you add real per-room figures. The whole-house renovation cost tool is top-down: area times a $/sq ft band. Running both and comparing is a good way to catch an optimistic assumption or a forgotten room.
Is the total a firm quote?
No. It is a planning estimate assembled from the numbers you enter. Confirm each line with itemized written quotes from licensed contractors, and pull permits for structural, electrical, plumbing and gas work.

Related calculators

Whole-House Renovation CostEstimate a whole-house renovation cost from your floor area and a $/sq ft band you choose — light, mid or full gut — plus any extra room roll-up.Budget Allocator by %Split a renovation budget across kitchen, bath, flooring, labor and other by percentage. Adjust the typical planning splits and enter your own total.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.Kitchen Remodel CostEstimate your kitchen remodel cost from line items you enter — cabinets, countertop, appliances, flooring, backsplash, labor — plus a contingency buffer.Bathroom Remodel CostEstimate your bathroom remodel cost from your own line items and labor rate, add a contingency buffer, and sanity-check contractor quotes before you commit.