Rehab Cost Estimator
Build itemized renovation scopes before you bid. Protect your flip or BRRRR margin from the most common deal-killer.
Free to start. No spreadsheets.
Visual Walkthrough
Rehab scopes break into three categories — each with different cost ranges and risk profiles:
Cosmetic
$15–$35/sqft
- Interior paint
- Flooring (LVP/carpet)
- Kitchen update
- Bath remodel
- Fixtures/hardware
- Landscaping
Mechanical
$12–$40k/system
- HVAC replacement
- Roof repair/replace
- Electrical panel
- Plumbing mains
- Water heater
- Insulation
Structural
Highly variable
- Foundation repair
- Framing
- Egress windows
- Load-bearing walls
- Waterproofing
- Slab leveling
Contingency Rate by Project Type
Light Cosmetic
8–10%
Low unknowns
Mid-Level
10–12%
Standard
Full Gut / Old Home
15–20%
High unknowns
The Rehab Estimation Formula — How to Build a Real Budget
Professional investors break renovation scopes into three cost categories, then apply a mandatory contingency buffer. This structure catches the budget surprises that destroy deal margins.
Worked Example: 3/1 SFR, Charlotte, NC — 1,200 sqft
Cosmetic
Interior paint: $3,200
Flooring (LVP): $5,400
Kitchen update: $9,500
Bathroom remodel: $5,800
Fixtures/hardware: $1,800
Subtotal: $25,700
Mechanical
HVAC replacement: $7,200
Roof repair (partial): $4,500
Water heater: $1,200
Electrical panel: $3,000
Subtotal: $15,900
Combined subtotal: $41,600
12% Contingency: $4,992
Total Rehab Estimate: $46,592
Pro Tip: Match your finish level to the neighborhood, not your personal taste. In a $180,000 ARV market, granite countertops and custom cabinets won't return their cost. Install mid-grade finishes that match what the $180k-$200k buyer expects — not what a $400k buyer expects.
Renovation Budgeting Fundamentals
What the Rehab Estimator Does
Breaks renovation costs into three categories: Mechanical (HVAC, electrical, plumbing, roof), Cosmetic (flooring, paint, kitchens, baths, fixtures), and Structural (foundation, framing, windows). Calculates the subtotal, then applies a 10-15% contingency reserve automatically — producing a defensible total budget that holds up against real contractor bids.
Why Rehab Accuracy Makes or Breaks Deals
Every dollar of rehab overrun comes directly out of your profit — not out of some separate fund. If you estimate $35,000 in repairs and end up spending $52,000, you just lost $17,000 in profit you planned to make. Most new investors discover this on their first deal. Experienced investors build conservative scopes with contingency from the start.
Building Your Rehab Scope
Inspect Mechanical Systems First
Check HVAC age and function, electrical panel capacity, plumbing mains, and roof condition. These are the big-ticket items that make or break a rehab budget.
Itemize Cosmetic Finishes by Room
Estimate flooring by sqft, paint by room, kitchen upgrades by scope, bathroom by scope. Match finish level to neighborhood — don't over-improve for the market.
Apply Contingency and Total
Add all line items. Apply 10-15% contingency to the subtotal. Never present a rehab budget without contingency — it's not optional, it's professional.
Most investors lose money here — avoid these mistakes:
- Using a flat cost-per-sqft rule instead of itemizing — a house with a failed HVAC and original 1970s plumbing is not the same as a cosmetic flip at the same size.
- Getting only one contractor quote and assuming it's accurate — single bids can be off by 25-50% in either direction.
- Ignoring permit costs and code-compliance upgrades that get triggered when permits are pulled.
Example Scenario
Interactive Scope Cost Builder
Select common renovation line items to build your preliminary budget outline.
Real-World Application
How experienced flippers build reliable rehab budgets:
- ✓Walk the property with a contractor, not alone — contractors spot hidden issues (attic moisture, foundation cracks) that investors miss.
- ✓Get 2-3 bids on all major trades. Accept the middle bid, not the lowest. The lowest bid almost always has hidden costs.
- ✓Inspect the electrical panel and plumbing at every walkthrough — code upgrades triggered by permits are the most common budget surprise.
- ✓Never finalize your rehab budget without walking the attic and crawlspace. Moisture, mold, and structural issues live there.
- ✓Add a separate line item for 'unallocated contingency' (10-15%) — don't bury it in individual line items or you'll spend it prematurely.
Rehab Budgeting — What Investors Need to Know
Q.Should I use cost per square foot or itemized estimates for rehab budgeting?
Always use itemized estimates for any deal you're actually pursuing. Cost-per-sqft rules ($20/sqft, $40/sqft, etc.) are only useful as a quick initial filter — they can be off by 40-60% on any individual property. A house with a failing roof, outdated electrical, and original 1970s plumbing has a completely different rehab cost than an identically sized house with updated mechanicals. Itemize everything: each trade, each room, each major system.
Q.What is the most expensive rehab item on most houses?
Mechanical systems are typically the most expensive category: HVAC replacement ($5,000-$12,000), full roof replacement ($8,000-$20,000+), electrical panel upgrade ($3,000-$8,000), and main line plumbing repairs ($4,000-$15,000). A house needing all four can require $20,000-$55,000 before touching a single cosmetic item. This is why mechanical inspection during the walkthrough is the first priority — not the kitchen.
Q.How do I account for lead paint or asbestos in my rehab budget?
If the house was built before 1978, budget for lead paint testing ($300-$500). If positive and you're disturbing painted surfaces, certified lead abatement adds $1,500-$10,000+ depending on scope. Asbestos is common in popcorn ceilings (pre-1980), floor tiles, pipe insulation, and attic insulation. Testing costs $400-$800; abatement $3,000-$30,000+. Build a $5,000-$10,000 environmental contingency into deals on pre-1980 homes.
Q.What's a realistic rehab timeline for a mid-level flip?
A 1,200-1,600 sqft house needing cosmetics + kitchen + bathrooms + one mechanical system typically takes 6-10 weeks with an experienced crew. Add 2-4 weeks for permit pulls, material lead times, and weather delays. Full gut renovations take 3-6 months. Investors who budget 3 months for a mid-level flip often end up at 5-6 months — which adds 2-3 months of hard money interest to their cost stack.
Q.What's the difference between CapEx and a rehab expense?
For investment purposes: rehab costs are pre-purchase renovation expenses that increase ARV. CapEx (capital expenditures) are post-acquisition replacement costs on a rental property — roof, HVAC, water heater, appliances — that occur during ownership. Flippers budget rehab. Landlords budget CapEx reserves (typically 5% of gross rent annually). These are different budgeting exercises for different exit strategies.
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