Renovation Math Pro · Bedrocka Tools
Renovation math without the contractor pitch.
Most home renovation cost calculators are run by contractors, lead aggregators, or home improvement platforms with a commission on the project. This site is the opposite: every formula is open-source, every estimate cites the primary source (RSMeans, Remodeling Magazine Cost vs. Value report, Fannie Mae homestyle guidelines, IRC §121 exclusion), and every tool is reviewed by a named operator. Built for homeowners calculating renovation ROI, project financing, and resale value uplift.
Calculators
Pick the renovation math you actually need.
Learn
Concepts behind the renovation math.
ROI
Renovation ROI by project type: what the Cost vs. Value report shows
Garage door replacement returns 194% at resale in the West vs. 87% for a major kitchen remodel. Here's the project-by-project and region-by-region breakdown from Remodeling Magazine's 2024 Cost vs. Value report.
Financing
HELOC vs. home equity loan vs. cash-out refi: renovation financing compared
HELOC, home equity loan, cash-out refi, and Fannie Mae HomeStyle each have different rate structures, draw mechanics, and tax treatment under IRC §163(h). Here's the framework for choosing.
What makes this different
Three things every Bedrocka Tools site does that the contractor-quote mills don't.
Open-source math
Every calculator's formula is published as TypeScript with Vitest tests in a public repo. Click "View source" in any math accordion to see the actual implementation. Most renovation cost calculators are lead-capture forms for contractors. We publish ours.
Browse the math →Primary-source citations only
Every cost benchmark, cost-recouped percentage, and financing guideline links to the original document — RSMeans cost data, Remodeling Magazine Cost vs. Value Report 2024, Fannie Mae HomeStyle Renovation Selling Guide B5-3.2, NAR Remodeling Impact Report, IRC §121. No "industry estimate" hedging. The citation is the proof.
Read the methodology →Named operator, no commission
Reviewed and signed by Byron Malone— operator-author who has modeled home renovation economics on his own properties. Not a contractor. Not a lead aggregator. Nothing here earns a commission tied to which contractor you hire or which project you pursue.
Read Byron's bio →Bedrocka Tools family
Renovation Math Pro is part of the Bedrocka Tools portfolio of source-cited calculator sites. For real estate investor math — cap rate, BRRRR, fix-and-flip, DSCR — visit propertymathpro.com (Real Estate Investor Toolkit). Same doctrine, different depth. Each site is individually source-cited and quarterly reviewed.
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