Home Improvement Calculators
Most contractor estimates swing 3× on the same square footage because nobody agrees on what "standard finish" means in your ZIP code. This calculator pins the math to 2024 national medians × your region × your finish level, so you walk into the bid conversation already knowing the fair range.
Plug in a project, its square footage, the finish level, and your region. We multiply 2024 national $/sqft medians by regional and complexity factors to give you a planning range.
Planning estimate
$57,500
Mid-scope total for a 200 sqft kitchen remodel in the East North Central region at standard finish, including a 15% contingency.
Mid-range: refaced cabinets, quartz counters, mid-tier appliances. Upscale: full custom cabinetry, stone counters, premium appliances, structural changes.
Standard finish: Mid-tier finishes, some layout tweaks, name-brand fixtures and appliances.
Sources: Remodeling Magazine — 2024 Cost vs. Value Report, HomeAdvisor True Cost Guide. Figures are 2024 national medians; re-validate against a local GC before committing to a scope.
Ten project-specific home renovation cost calculators with cost breakdowns, regional math, and FAQs — pick the project closest to your scope and the math snaps to it.
Kitchen calculator
Calculate your 2026 kitchen remodel cost instantly. Free tool with regional pricing, material breakdowns, and finish-level estimates. No email required.
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Bathroom calculator
Estimate your 2026 bathroom remodel cost by size and finish level. Free calculator with regional labor rates. No signup needed.
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Basement calculator
Calculate 2026 basement finishing cost per square foot. Free tool with waterproofing, egress, and bath add-on math. No email required.
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Roofing calculator
Estimate your 2026 roof replacement cost by material and roof size. Free calculator covering asphalt, metal, and tile. No signup needed.
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Flooring calculator
Calculate 2026 flooring installation cost by material and area. Free tool covering LVP, engineered hardwood, solid hardwood, and tile. No email required.
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Addition calculator
Estimate your 2026 room addition cost per square foot. Free calculator including foundation, framing, and roof tie-in budgets. No signup needed.
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Attic conversion calculator
Calculate 2026 attic conversion cost including dormer, egress window, and structural reinforcement budgets. Free regional tool. No email required.
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Garage conversion calculator
Estimate 2026 garage conversion or ADU cost. Free calculator with floor raise, insulation, HVAC, and bath add-on budgets. No signup needed.
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Siding calculator
Calculate 2026 siding replacement cost by material — vinyl, fiber-cement, engineered wood. Regional pricing with wrap and flashing budgets. No email required.
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Full-home calculator
Estimate your 2026 whole house renovation cost per square foot. Free calculator covering gut remodels, kitchens, baths, and mechanical upgrades. No signup needed.
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Every Renomath estimate is built from three published, independently sourced inputs — never marketing-room ranges or contractor self-reports.
We add a 15% contingency on the base scope. Industry convention is 10–20%; pre-1980 homes and structural changes lean closer to 20%. Source data was last refreshed against the 2024 Cost vs. Value Report; this page’s pricing logic was last updated April 25, 2026.
Limitations. Outputs are planning estimates only — not contractor bids. Outlier markets (Manhattan, Aspen, Maui), structural surprises (load-bearing changes, foundation work), and hazardous-material remediation (asbestos, knob-and-tube) are not modelled. Always compare against 2–3 local bids before committing scope.
Step 1
We start from 2024 mid-point $/sqft for ten common project types — kitchen, bath, basement finish, addition, roof, siding, flooring, and more. Numbers are pulled from the Cost vs. Value report and HomeAdvisor's True Cost Guide.
Step 2
Basic finishes run 0.75×, standard 1.0×, upscale 1.65×. Regional multipliers span 0.88× (East South Central) to 1.22× (Pacific). Same square footage, very different invoice.
Step 3
Every real remodel hits unknowns — rotted sheathing, out-of-code wiring, delayed cabinets. Industry convention is a 10–20% buffer; we budget 15% by default.
Need a project-specific calculator? Browse all home improvement calculators →
Grounded in the 2024 Cost vs. Value Report, HomeAdvisor's True Cost Guide, and the multipliers used by the calculator above.
A 10×10 kitchen is 100 sqft. At the 2024 national mid-point of about $250 per sqft for a standard-finish kitchen, you're looking at roughly $25,000 in base scope before contingency. Shift to builder-grade finishes and it drops to around $15,000; push to upscale custom cabinetry and stone it climbs past $50,000. Add a 10–20% contingency on top.
Cabinets alone are a subset of a basic-scope kitchen remodel, so yes — cabinets-only is almost always cheaper. A refaced or replaced cabinet project typically lands near the low end of our basic kitchen range (around $150 per sqft × your layout), while a full remodel that also touches counters, appliances, plumbing, and electrical pushes past $250 per sqft at mid-scope. If the layout works and the boxes are sound, cabinets-only is the higher-ROI move.
Industry convention is 10–20% of base cost. Renomath defaults to 15%, which covers the unknowns that show up once walls open — rotted sheathing, out-of-code wiring, plumbing reroutes, and the inevitable material price creep between bid and install. Older homes and structural changes lean closer to 20%; in-kind refreshes can get away with 10%.
At 2024 national averages: about $125 per sqft for a basic refresh, $250 per sqft at a standard mid-range scope, and up to $550 per sqft for upscale work with custom tile, frameless glass, heated floors, and layout changes. Apply your regional multiplier (0.88× to 1.22×) on top. A typical 40-sqft hall bath at standard finish runs roughly $10,000 before contingency.
Almost always, yes. Any time a basement finish involves framing, drywall, electrical runs, plumbing rough-ins, or egress window changes, your local building department will require a permit and inspections. Cosmetic-only work (paint, flooring over existing slab) is often the exception. Permit fees are typically 0.5–2% of project cost — budget for them inside your base scope, not your contingency.
At standard finish on the national average, 200 sqft × $250 per sqft = $50,000 base cost, plus a 15% contingency lands you near $57,500. Move to the Pacific region (1.22×) at upscale finish (1.65×) and the same 200 sqft climbs past $115,000 all-in. Plug your exact region and finish into the calculator above for a scenario-specific number.
Per Remodeling Magazine's 2024 Cost vs. Value Report, a minor midrange kitchen remodel typically recoups about 85% of its cost at resale on a national average, while a major midrange kitchen remodel recovers closer to 49%. Upscale kitchens almost always return less than mid-range. ROI is higher when the existing kitchen is badly dated, lower when you're already at market-standard finish.
Same project, very different invoice depending on where you build. Renomath normalises the U.S. national average to 1.00, then applies the Cost vs. Value regional rollups: East South Central (AL, KY, MS, TN) at 0.88×, Pacific (CA, OR, WA) at 1.22×, New England at 1.18×. A $50,000 project in Nashville becomes a $61,000 project in Seattle — nothing changed except ZIP code.
We multiply the base $/sqft by 0.75× for basic, 1.0× for standard, and 1.65× for upscale. Basic = builder-grade finishes, in-kind replacement, minimal structural changes. Standard = mid-tier fixtures and appliances, some layout tweaks. Upscale = custom cabinetry or tile, stone counters, premium fixtures, structural or layout changes. The scope — not just the materials — is what actually moves the multiplier.
A primary suite addition is new footprint, which runs $130–$400 per sqft at 2024 national averages depending on finish level and whether the suite includes a full bath (it usually does). A 300 sqft bed-plus-bath addition at standard finish averages around $66,000 base; the same scope at upscale in a Pacific-region market pushes past $160,000 before contingency.
A HELOC or cash-out refi makes sense when you have the equity, want a simple draw, and the scope is predictable. A renovation loan (FHA 203(k), Fannie Mae HomeStyle, or a bank construction-to-perm) is the right call when you need to roll the remodel cost into a purchase, when projected after-repair value is load-bearing on the approval, or when scope exceeds your available equity. Talk to a lender before choosing — pricing and draw schedules differ materially between products.
A standard remodel bid typically includes labor, subcontractors, materials spelled out in the scope, dumpster and cleanup, and permit fees. It usually excludes: appliances the homeowner picks out separately, design or architecture fees, sales tax on client-supplied materials, change orders, and anything hidden behind drywall that hasn't been exposed yet. Read the exclusions page — that's where a "cheap" bid becomes an expensive one.
Renomath is free to use. We don't sell contractor leads, don't run referral fees, and we don't collect your inputs.