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Rehab Cost Estimator
For Fix & Flip Investors

Total finished square footage
Cosmetic: 15-25 · Moderate: 25-45 · Full gut: 45-80 · Addition: 100+
Permits, utility connections, dumpsters
Recommended: 15-20%

What Drives Rehab Cost Per Square Foot

Rehab cost depends on the scope of work. Use these benchmarks to estimate your project:

Rehab TypeCost/sqftTypical Scope
Cosmetic$15-25Paint, flooring, fixtures, light finishes
Moderate$25-45Kitchen/bath updates, some mechanical, drywall
Full Gut$45-80Down to studs, all systems replaced, layout changes
Addition$100-200+Square footage additions, second story, accessory dwellings
Commercial$50-150Commercial buildouts, restaurants, mixed-use

Cost Categories To Include

A complete rehab budget includes more than just labor and materials. Don't forget:

  • Permits: $500-3,000 depending on jurisdiction and scope
  • Utility connections: $1,000-5,000 if reconnecting power, water, sewer
  • Dumpsters and debris removal: $500-2,000 for full gut
  • Holding costs during rehab: interest, taxes, insurance, utilities — adds up fast on longer projects
  • Major systems: roof ($8K-25K), HVAC ($5K-15K), electrical service ($3K-8K), plumbing ($5K-20K) — get these inspected before closing
  • Foundation work: $10K-50K+ if structural issues discovered

Why Contingency Matters

Experienced investors budget 15-20% contingency for unexpected issues. On a $50K rehab, that's $7,500-$10,000 in buffer. Common surprises:

  • Hidden mold, asbestos, or lead paint requiring remediation
  • Failed inspections requiring rework (electrical, plumbing, structural)
  • Code upgrades triggered by major work (sprinklers, egress windows, etc.)
  • Subcontractor delays causing extended holding costs
  • Material price increases between budget and execution

If you don't use the contingency, it becomes additional profit. If you do, you're prepared. Either way, you're not over-leveraged.

Using This Estimate For Offer Calculations

Once you have your rehab estimate, plug it into the standard fix-and-flip offer formula:

Max Offer = (ARV × 0.70) − Estimated Rehab Cost

For example: If a property has an After Repair Value (ARV) of $400,000 and rehab is estimated at $60,000, max offer = ($400,000 × 0.70) − $60,000 = $280,000 − $60,000 = $220,000.

The 70% covers your purchase + closing + holding + sale costs + flip profit. Adjust to 75% in lower-margin markets or 65% if you need a larger profit cushion.

Frequently Asked Questions

How accurate are rehab estimates before closing?

Estimates from walkthroughs alone are typically ±20-30%. To tighten accuracy, get a contractor walkthrough during inspection contingency, pull permits on past work, and inspect mechanical systems. A 15-20% contingency buffer covers normal estimation variance.

Should I do a cosmetic flip or a full gut?

Depends on the property and market. Cosmetic flips have lower risk and faster turn (60-90 days). Full guts have higher upside but longer timelines (4-6 months) and more risk. Match the scope to comps — if all sold comps are renovated, you need to renovate. If many sold "as-is" lately, lighter rehab may work.

What rehab budget is too high for the property?

A general rule: if your all-in cost (purchase + rehab + closing + holding) exceeds 80% of ARV, the deal is too thin. Above 85% of ARV all-in is usually a no-go. Run the numbers before getting attached.

Does LendingStreet finance the rehab cost?

Yes — fix and flip loans through our marketplace typically cover 90-100% of rehab plus 80-90% of purchase. Funds release in draws as work is completed. Contact us for current LTC and LTV limits across our 30+ capital sources.

What if I go over budget?

Most fix and flip loans have provisions for budget overruns — but at the borrower's expense, not from the loan. Keep contingency in cash reserves separate from the loan. Going over budget without reserves can stall a project and trigger default.

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