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Estimate Your Home Renovation Budget

Built by Kevin Glover · @gloverbuilds · Verified formula

Get cost estimates for kitchen, bathroom, basement, and whole-house renovations by scope and quality level.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

In this article

Renovation Costs by Project
ROI at Resale

Custos por Ambiente no Brasil

Cozinha: R$8.000-60.000. Banheiro: R$5.000-30.000. Pintura geral: R$3.000-10.000. Piso: R$5.000-20.000. Telhado: R$8.000-25.000. Regra de ouro: reserve 20% a mais para imprevistos — reformas SEMPRE revelam surpresas (canos velhos, fiação inadequada, estrutura comprometida).

ROI por Ambiente

Melhor ROI: cozinha cosmética (pintar armários + bancada), banheiro (gabinete novo + iluminação), pintura geral. Menor ROI: piscina, ampliação (custo alto, valorização parcial). No Brasil, a reforma de banheiro tem o melhor impacto no valor do imóvel.

⚡ CalcWolf Insight

The most common renovation mistake: starting without a complete budget. The industry rule of thumb: add 20% contingency to any contractor quote. Unexpected issues (hidden water damage, outdated wiring, structural problems) arise in 60-70% of renovations, and the average overage is 15-25% of the original budget.

Frequently asked questions

Quanto para reformar toda a casa?▾

Cosmética: R$15.000-30.000. Média: R$50.000-100.000. Completa: R$100.000-300.000 dependendo do tamanho.

Por onde começar?▾

1) Hidráulica e elétrica (segurança). 2) Telhado (proteção). 3) Banheiro/cozinha (maior impacto visual e funcional).

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Kevin Glover · @gloverbuilds

Founder, CalcWolf · GLVTS · Blickr

All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →