How Cash Home Buyers Calculate Offers (No BS Breakdown)

You’ve probably seen the ads: “We’ll buy your house for cash!” They all promise fast, fair offers — but nobody explains how those numbers actually get calculated. What goes into a cash offer? Why is it below what Zillow says your home is worth? What’s the investor actually planning to do with the property?

At We Buy Property LLC, we believe transparency builds trust. So here’s the actual math behind every cash offer we make in the Pittsburgh area — nothing hidden, no sales spin.

The Core Formula: ARV − Repairs − Profit − Costs = Your Offer

Every professional cash home buyer — whether in Pittsburgh, Philadelphia, or anywhere else — uses a version of the same formula:

Maximum Allowable Offer (MAO) = After Repair Value × 70% − Estimated Repair Costs

Let’s break down each variable.

After Repair Value (ARV)

ARV is what the property will be worth after renovations are complete and it’s ready for retail sale. We estimate ARV by looking at comparable sales — homes similar in size, age, bedroom/bathroom count, and location that sold in the last 3-6 months in a renovated or good condition state. In Allegheny County, we use data from the Multiple Listing Service (MLS), Redfin, and county deed records.

For a 3-bedroom, 1.5-bath home in Brentwood PA in good renovated condition, ARV might be $175,000 based on recent comparable sales. That’s our starting number.

The 70% Rule (and Why It Exists)

Why do we multiply ARV by 70%? Because 30% of ARV needs to cover:

• Profit margin — We’re running a business. A typical project profit target is 10-15% of ARV after all costs.
• Holding costs — Every month the property is being renovated or listed for resale costs money: property taxes, insurance, utilities, financing costs if any. A 3-month renovation plus 2-month resale = 5 months of carrying costs, typically 1-2% of ARV per month.
• Selling costs — When we resell, we pay a buyer’s and seller’s agent commission (5-6%), title insurance, transfer taxes (PA state + local = approximately 2-4% in Allegheny County), and closing costs.
• Risk buffer — Renovation projects hit surprises. A 10% cost overrun is normal. We don’t pass that risk to sellers.

Estimated Repair Costs

Repair cost estimates come from our experience completing hundreds of Pittsburgh-area renovations combined with a walkthrough of your specific property. Common repair categories:

• Roof: $6,000–$14,000 for a typical Pittsburgh-area replacement (varies by size, material, pitch)
• HVAC: $4,000–$8,000 for a forced-air system replacement; add $3,000–$5,000 for ductwork
• Kitchen renovation: $15,000–$35,000 for a full update (cabinets, counters, appliances)
• Bathroom: $8,000–$18,000 per bathroom for a full renovation
• Flooring: $8,000–$18,000 whole house depending on square footage and materials
• Electrical update: $5,000–$15,000 depending on scope; knob-and-tube replacement can run $15,000–$30,000
• Foundation/structural: $10,000–$50,000+ depending on severity; Pittsburgh’s hillside terrain makes foundation issues common
• Paint (interior): $3,000–$7,000 whole house
• Windows: $400–$700 per window installed; whole-house replacement $8,000–$20,000

Pittsburgh’s housing stock averages 68 years old — meaning most houses we buy need multiple systems addressed. A property that needs a new roof, updated electrical, HVAC, kitchen, and two bathrooms could easily have $80,000+ in needed repairs.

Working the Formula With Real Pittsburgh Numbers

Let’s run a real example. A 3BR/1BA house in Swissvale, PA. Needs a new roof, kitchen update, one bathroom renovation, and interior paint. ARV of $150,000.

• ARV: $150,000
• × 70%: $105,000
• − Repair estimate: $45,000 (roof $10K, kitchen $20K, bath $10K, paint $5K)
• = Maximum Allowable Offer: $60,000

So we’d offer approximately $60,000 for this property. The seller receives $60,000 cash, no commissions, no repairs. We invest $45,000 in renovations, spend approximately $10,000 in holding and selling costs, and sell for $150,000 — netting approximately $35,000 profit on a project that takes 3-5 months.

Why Your Offer May Be Higher or Lower Than the “Standard” Formula

Several factors push our offer above or below the baseline formula:

Higher offer factors:

• Property in a high-demand neighborhood (competition for deals means we accept lower margins)
• Minimal repairs needed (less risk, lower repair deduction)
• Rising ARVs in the market (we price toward current comps, not past sales)
• Clear title, simple transaction (less complexity = less risk)

Lower offer factors:

• Unknown structural issues (foundation, frame, slab)
• Active code violations or condemnation orders (additional cost to clear)
• Tenant in place requiring eviction (legal cost + timeline)
• Tax liens or judgment liens beyond the mortgage (payoffs reduce your equity)
• Environmental issues (oil tanks, asbestos, lead paint requiring abatement)
• Difficult market to resell (McKeesport, Clairton, Duquesne vs. Mount Lebanon, Fox Chapel)

What About Allegheny County’s CLR and Tax Assessments?

Allegheny County’s 2026 Common Level Ratio is 50.14% — meaning county assessed values are approximately half of actual market values. This affects property taxes on the investment side: we calculate annual carrying costs based on actual assessed value and millage rates, not ARV. City of Pittsburgh’s millage increased from 8.06 to 9.67 mills in 2026 (roughly 20%), which slightly increases carrying costs for Pittsburgh-city properties.

How We Buy Property Differs From National iBuyers

National iBuyers (Opendoor, Offerpad, and similar) use algorithmic pricing and target move-in ready properties in standardized suburban markets. They have limited appetite for properties with condition issues, legal complications, or non-standard situations.

We Buy Property is a local Pittsburgh-area buyer. We know the Mon Valley, the North Side, Penn Hills, and the hillside neighborhoods that algorithms can’t accurately price. We handle the full range of Pittsburgh housing conditions — including properties that national iBuyers won’t touch.

Frequently Asked Questions About Cash Offer Calculations

Why is your offer lower than what Zillow says my house is worth?

Zillow’s Zestimate is based on public data and comparable sales of retail homes in updated condition. It does not account for repair costs, holding costs, selling costs, or investor profit margin. The Zestimate is a rough retail value estimate, not what the market will pay for a property in its current condition. Our offer reflects current condition and the cost to bring the property to retail standard.

Can I negotiate a cash offer?

Yes. We’re happy to discuss our offer and the assumptions behind it. If you have competing offers or believe our repair estimates are off, bring that information to us. We’ll either explain our reasoning or adjust if warranted. What we won’t do is inflate a number just to get a contract signed and then reduce it during due diligence — that’s a predatory practice we don’t engage in.

How do you handle it if you discover more damage after the offer?

We build a risk buffer into every offer. If our walkthrough misses something minor, we absorb it. For major issues discovered during due diligence (e.g., structural damage not visible without opening walls), we’ll discuss it with you honestly before closing. We won’t use hidden damage as a renegotiation tactic on the day of closing.

Ready to see real numbers for your Pittsburgh-area property? Request a no-obligation cash offer from We Buy Property LLC. We walk through your property, explain our calculation, and give you a written offer with no pressure. 73+ Google Reviews. (412) 424-6412.