Tiny Toolkit

Rehab Budget Calculator

Build a comprehensive rehab budget by entering costs across all major categories — kitchen, bathrooms, flooring, roof, HVAC, electrical, plumbing, and more. A contractor overhead percentage is applied to the subtotal to produce a realistic total budget figure. All non-zero line items are displayed in an itemized breakdown you can review before committing to a deal or presenting to a lender.

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Frequently Asked Questions

What is contractor overhead?
Contractor overhead (typically 10–20%) covers the general contractor's profit margin, project management, insurance, and administrative costs on top of direct labor and materials. Getting a formal bid will include this — this calculator applies it as a percentage to your line-item estimates.
Should I add a contingency to my rehab budget?
Always. A 10–20% contingency buffer is standard practice. Hidden issues (rot behind walls, outdated wiring, foundation problems) are common once a rehab begins. Building in contingency prevents going over budget or stalling a project mid-renovation.
How do I get more accurate rehab estimates?
Walk the property with a licensed contractor or experienced investor before making an offer. Get 2–3 bids on major items (roof, HVAC, foundation). Use per-square-foot estimates for flooring and paint as a starting point, then refine with actual bids.
What are the most commonly underestimated rehab costs?
Electrical upgrades (especially older knob-and-tube or aluminum wiring), plumbing replacement, foundation or structural work, and permit costs are the most frequently underestimated. HVAC system replacement is also often underestimated in full-gut rehabs.

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