BRRRR Rehab Costs: How to Estimate Renovation Budgets Like a Pro

In BRRRR investing, the rehab budget is the number that makes or breaks your deal. Overestimate, and you will pass on good deals. Underestimate, and you will leave money in the deal that you cannot recover on the refinance — or worse, run out of funds mid-renovation. The ability to estimate rehab costs accurately is the single most valuable skill a BRRRR investor can develop.

This guide gives you a systematic approach to estimating renovation costs, including price ranges for common projects, a framework for building your scope of work, and the hard-learned lessons that separate successful rehabbers from those who blow their budgets.

Why Rehab Estimates Matter More in BRRRR

In a fix-and-flip, a rehab cost overrun reduces your profit. In BRRRR, it does something worse: it reduces the capital you recover on the refinance. Remember, the goal of BRRRR is to get all or most of your investment back when you refinance. If your rehab costs $15,000 more than planned, that is $15,000 less you recover — money that cannot be deployed into your next deal.

The math is unforgiving. Say your total budget is $150,000 and you planned to refinance at $200,000 (75% LTV = $150,000 loan). If the rehab goes $15,000 over budget, your total investment is now $165,000, but you still only get $150,000 from the refinance. You have $15,000 stuck in the deal that should be funding your next property.

The Three Levels of Renovation

Level 1: Cosmetic Rehab ($10-$25 per square foot)

A cosmetic rehab is the lightest touch. The property is structurally sound, mechanicals (HVAC, plumbing, electrical) are in working order, and the renovation focuses on making the property look and feel updated. Typical cosmetic work includes interior and exterior paint ($2-5/sqft), new flooring such as LVP or carpet ($3-7/sqft), updated light fixtures and hardware ($500-1,500 total), kitchen refresh with painted cabinets and new hardware and countertops ($3,000-8,000), bathroom refresh with new vanity and fixtures and re-grouted tile ($1,500-4,000 per bath), and landscaping and curb appeal improvements ($1,000-3,000).

Cosmetic rehabs are ideal for BRRRR because they deliver the highest return per dollar. A $15,000 cosmetic rehab on a 1,200-square-foot house can add $40,000 or more in value. The key is finding properties that are ugly but structurally sound — the classic "lipstick on a pig" approach.

Level 2: Moderate Rehab ($25-$60 per square foot)

A moderate rehab goes beyond cosmetics. You are replacing some systems, doing significant kitchen and bathroom work, and possibly addressing minor structural issues. Common moderate rehab items include full kitchen remodel with new cabinets, countertops, and appliances ($8,000-20,000), full bathroom remodel with new tub/shower, tile, vanity, and toilet ($5,000-12,000 per bath), HVAC replacement ($4,000-8,000), electrical panel upgrade ($1,500-3,000), plumbing repairs or partial re-pipe ($2,000-8,000), roof repair or partial replacement ($3,000-8,000), window replacement ($300-700 per window), and drywall repair or replacement in affected areas ($2-5/sqft).

Moderate rehabs carry more risk because the scope can expand once you open up walls. What looks like a simple bathroom remodel can turn into a plumbing overhaul once you discover corroded pipes behind the tile. Budget conservatively and expect surprises.

Level 3: Full Gut Rehab ($60-$120+ per square foot)

A full gut rehab means taking the property down to the studs and rebuilding. Everything gets replaced: all mechanicals, drywall, insulation, flooring, kitchen, bathrooms, windows, roof, and possibly structural elements. Gut rehabs are typically reserved for severely distressed properties purchased at a deep discount.

Full gut rehabs are high-risk, high-reward. The purchase price is usually very low, and the value-add potential is enormous. But the execution risk is also the highest. Gut rehabs require experienced contractors, detailed permitting, and deep pockets for the inevitable surprises. If you are new to BRRRR, start with cosmetic or moderate rehabs and work your way up to gut projects.

Building Your Scope of Work

A scope of work (SOW) is a detailed document that lists every item to be repaired, replaced, or installed, along with materials specifications and quantities. Your SOW is the foundation of your rehab budget and your contractor agreement. Without it, you are guessing — and guessing is how budgets blow up.

Walk the property room by room and document everything. For each room, note the condition of the walls, ceiling, floor, windows, doors, trim, electrical outlets and switches, plumbing fixtures, and lighting. Take photos of every deficiency. Then create a line-item list organized by category.

Your SOW categories should include: demolition, structural, roofing, HVAC, plumbing, electrical, insulation, drywall, paint (interior and exterior), flooring, kitchen (cabinets, countertops, appliances, backsplash, sink, faucet), bathrooms (tub/shower, tile, vanity, toilet, faucet, mirror), doors and trim, windows, hardware and fixtures, landscaping and exterior, and cleaning and dumpster.

For each line item, specify the quantity, material, and expected cost. "New flooring" is not a scope item. "Install 1,200 sqft of luxury vinyl plank flooring, LifeProof brand, color Sterling Oak" is a scope item. The more specific your SOW, the more accurate your bids will be, and the fewer disputes you will have with contractors mid-project.

Getting Contractor Bids

Always get at least three bids from licensed, insured contractors. Provide each contractor with the same SOW so you are comparing apples to apples. Ask for an itemized bid, not a lump sum — you need to see where the money is going so you can identify outliers and negotiate intelligently.

When evaluating bids, the lowest price is not always the best choice. Look at the contractor's track record with investor projects, their proposed timeline, their payment terms, and how detailed their bid is. A contractor who provides a vague, low-ball bid is more likely to hit you with change orders mid-project than one who provides a thorough, slightly higher estimate.

Ask every contractor for at least three references from recent projects. Call those references and ask specific questions: Did the project finish on time? Was the final cost within 10% of the original bid? How did the contractor handle unexpected issues? Would you hire them again? A ten-minute phone call can save you thousands.

The Contingency Rule: Budget 10-20% Extra

No matter how detailed your SOW and how accurate your bids, unexpected costs will arise. Hidden water damage behind walls, asbestos in old flooring, termite damage in the subfloor, code violations that require upgrades, and material price increases all add up. The contingency is not a nice-to-have — it is a requirement.

For cosmetic rehabs where the risk of surprises is low, a 10% contingency is reasonable. For moderate rehabs, budget 15%. For gut rehabs, 20% is the minimum. Apply the contingency to your entire rehab budget, not individual line items. If your line-item budget totals $40,000, your working budget should be $44,000-$48,000.

Here is the critical part: include the contingency in your deal analysis. When you calculate whether a BRRRR deal meets the 75% rule, use the budget-plus-contingency number, not the base budget. If the deal only works at the base budget, it does not really work — because the base budget is the best-case scenario, not the expected case.

Red Flags That Blow Budgets

Certain issues are notorious for turning a manageable rehab into a money pit. Foundation problems are the biggest red flag. Repairing a foundation can cost $5,000-$30,000 or more, and foundation issues often cause cascading damage to walls, floors, and plumbing. If you see significant foundation cracks, uneven floors, or doors that will not close properly, get a structural engineer's assessment before making an offer.

Old plumbing — particularly galvanized steel or polybutylene pipes — can require a full re-pipe costing $5,000-$15,000. Knob-and-tube electrical wiring or a Federal Pacific electrical panel both require full replacement for safety and insurance reasons, typically $8,000-$15,000. Extensive mold remediation can run $2,000-$10,000 depending on the scope. And any property with significant fire or flood damage carries risk that is difficult to estimate without opening walls.

None of these issues are automatic deal-killers, but they must be reflected in your purchase price. If a full re-pipe adds $10,000 to your rehab budget, you need to pay $10,000 less for the property to maintain your margins.

Example Rehab Budget Breakdown

Here is a real-world budget for a 1,100-square-foot, three-bedroom, one-bathroom BRRRR property — a moderate cosmetic rehab in a B-class neighborhood.

Demolition and debris removal: $1,500 | Interior paint (walls, ceilings, trim): $3,500 | Exterior paint: $2,500 | LVP flooring throughout: $4,400 | Kitchen (cabinets, counters, appliances, sink): $9,000 | Bathroom (vanity, toilet, tub surround, tile floor): $4,500 | Light fixtures and ceiling fans: $800 | Electrical (update outlets, new panel breakers): $1,200 | Plumbing (new faucets, supply lines, drain clearing): $900 | HVAC servicing and duct cleaning: $600 | Windows (5 replacements): $2,500 | Interior doors (6) and hardware: $1,200 | Landscaping and exterior cleanup: $1,800 | Dumpster and cleaning: $800

Subtotal: $35,200 | 15% contingency: $5,280 | Total rehab budget: $40,480

This budget puts the rehab at roughly $32-$37 per square foot, squarely in the moderate cosmetic range. The property was purchased at $95,000 with an ARV of $185,000. Total all-in cost including purchase, rehab, and holding costs was $142,000, well within the 75% threshold of $138,750. After refinancing at 75% LTV, the investor recovered $138,750 and had approximately $3,250 left in the deal.

Track your actual costs against the budget throughout the project. Use a simple spreadsheet with columns for each line item: budgeted amount, actual amount, and variance. Review it weekly. If you see costs trending above budget early in the project, address it immediately — do not wait until the money runs out.