Rehab cost estimation is part science, part experience, and zero guesswork. The investors who consistently hit their numbers don't have a crystal ball. They have a system.
Three Levels of Estimation
Level 1: Windshield Estimate (accuracy +/- 30%)
Drive by the property. Look at the exterior. "This looks like a $40K-$50K job." Good enough to decide whether to pursue the deal. Not good enough to set your budget.
Level 2: Walkthrough Estimate (accuracy +/- 15%)
Walk the property room by room. Note major systems - roof, HVAC, electrical, plumbing. Estimate by category: kitchen $8K, bathrooms $6K, flooring $4K, paint $2K. This is what you need before making an offer.
Level 3: Scope of Work Estimate (accuracy +/- 5%)
Detailed, line-item scope with specific materials, quantities, and labor costs. This is what Seller's Little Helpers produces during the $150 scope visit. This is the number you use for your actual budget.
Per-Square-Foot Benchmarks
For Level 1 and Level 2 estimates, use these starting points:
- Cosmetic refresh (paint, flooring, fixtures): $15-$25/sqft
- Moderate rehab (cosmetic + kitchen/bath remodel): $30-$50/sqft
- Full gut (studs out, new everything): $60-$100/sqft
These vary by market. Track actual costs on completed projects to calibrate for your area.
The Category Breakdown
For Level 2 estimates:
| Category | Cosmetic | Moderate | Full Gut | |---|---|---|---| | Demo | $0-$1K | $2K-$4K | $4K-$8K | | Structural | $0 | $0-$2K | $2K-$10K | | Electrical | $0-$500 | $2K-$5K | $5K-$12K | | Plumbing | $0-$500 | $2K-$5K | $5K-$10K | | HVAC | $0 | $0-$5K | $5K-$12K | | Drywall | $0-$1K | $2K-$4K | $4K-$8K | | Flooring | $2K-$4K | $4K-$8K | $6K-$12K | | Kitchen | $1K-$3K | $5K-$10K | $10K-$20K | | Bathrooms | $500-$2K | $3K-$6K | $6K-$12K | | Paint | $1K-$2K | $2K-$3K | $3K-$5K | | Exterior | $0-$2K | $2K-$5K | $5K-$15K |
The Contingency Rule
Always add contingency:
- Cosmetic rehab: 10%
- Moderate rehab: 15%
- Full gut: 20%
Your $40K moderate rehab estimate becomes a $46K budget. That contingency isn't padding. It's math. Unknown conditions, material price swings, and minor scope adjustments eat it on almost every project.
How Weekly Draws Improve Your Estimates Over Time
Weekly draws give you a cost tracking advantage. You're comparing actual costs against estimates every single week. By Week 3 of a 10-week project, you know whether you're trending over or under budget with 70% of the project ahead of you.
With milestone payments, you might not discover a budget overrun until 60% of the money is spent. With weekly draws, you catch deviations early enough to adjust.
At Seller's Little Helpers, every weekly draw review includes a budget comparison. If we're running hot, you know in Week 2, not Week 8.
The Experience Factor
There's no substitute for doing deals. Your estimation accuracy gets dramatically better after 3-5 completed rehabs. Until then, lean on professionals. Our $150 scope visit exists specifically for investors who need an accurate Level 3 estimate from someone who's done this hundreds of times.
Book a $150 scope visit at sellerslittlehelpers.com - get an accurate, line-item estimate before you commit a dollar. Call (708) 536-6700 or visit https://sellerslittlehelpers.com.