How to Estimate House Flipping Rehab Costs by Square Foot
Accurate renovation budgeting is the primary determinant of profitability in fix-and-flip and BRRRR real estate deals. Underestimating repair costs causes investors to overpay for acquisitions, compress profit margins, or experience negative cash-out refi spreads.
Professional investors evaluate repair budgets using a two-stage methodology: square-foot rapid feasibility for initial offer screening, followed by an itemized trade scope of work during physical inspection due diligence.
Light Cosmetic ($15–$25 / sqft)
Ideal for structurally sound homes requiring modern visual updates: fresh interior/exterior paint, luxury vinyl plank flooring, new light fixtures, modern hardware, and basic landscaping.
Medium Remodel ($30–$50 / sqft)
Includes full cosmetic updates plus substantial kitchen cabinet/countertop replacements, bathroom tile overhauls, architectural shingle roof replacement, and HVAC system service or replacement.
Heavy Gut Rehab ($60–$100+ / sqft)
Required for distressed or fire/water-damaged properties: complete demolition to studs, new 200A electrical service, PEX plumbing rough-in, foundation leveling, and structural framing.
Detailed Renovation Cost Breakdown: Light vs. Medium vs. Heavy Scope
| Construction Trade | Light Scope (1,800 sqft) | Medium Scope (1,800 sqft) | Heavy Gut (1,800 sqft) |
|---|---|---|---|
| Kitchen Remodel | $5,000 – $8,000 (Paint & tops) | $12,000 – $18,000 (New shaker) | $22,000 – $35,000+ (Custom layout) |
| Bathrooms (2 Full) | $4,000 (Vanities & faucets) | $10,000 – $15,000 (Tiled showers) | $18,000 – $28,000 (Plumbing move) |
| Flooring (LVP & Carpet) | $5,500 ($3.00/sqft) | $9,000 ($5.00/sqft) | $14,000+ (Subfloor leveling) |
| Roofing & Gutters | $1,500 (Minor repair) | $8,500 – $11,000 (New tear-off) | $14,000+ (Rafters/Decking) |
| HVAC Heating & Cooling | $1,000 (Tune-up & ducts) | $7,500 – $9,500 (New unit) | $12,000 – $16,000 (Full ductwork) |
Why Every Flip Needs a 15–20% Contingency Buffer
In residential construction, unknown variables are uncovered once demolition begins. Even experienced licensed general contractors cannot predict hidden pipe corrosion behind wet walls, unpermitted electrical splices inside junction boxes, or insect infestation inside joists.
A mandatory 15% to 20% contingency reserve ensures that unavoidable change orders do not consume your projected profit margin or exhaust your hard money rehab draw facility mid-project.