---
id: "concept-replacement-cost-margin"
type: "concept"
source_timestamps: ["00:35:00", "00:37:00"]
tags: ["acquisitions", "valuation", "margin-of-safety"]
related: ["framework-deal-evaluation-triad", "action-buy-below-replacement", "claim-class-c-too-risky", "quote-perfect-property"]
definition: "An acquisition strategy focused on purchasing existing properties for less than the current cost of constructing a comparable new building, providing a margin of safety."
sources: ["mcelroy"]
sourceVaultSlug: "mcelroy-multifamily-distress-playbook-2026Jun25"
originDay: 9
---
# Buying Below Replacement Cost

## Core Idea

A core tenet of [[entity-ken-mcelroy]]'s current investment strategy is acquiring assets at a price significantly below their **replacement cost** — the amount it would cost to construct the exact same building from scratch today. This is the first leg of the [[framework-deal-evaluation-triad]] and the operational mandate in [[action-buy-below-replacement]].

## Why It Works Now

Due to rising construction costs (materials, labor) and declining asset values caused by higher interest rates, it is now possible to buy existing, relatively new properties for **less than the cost to build them**. This provides a massive margin of safety because:

- New supply is unlikely to enter the market and compete with you — developers cannot build profitably at current market rents and construction costs.
- The asset has a structural cost-side moat against new competition.

## Concrete Numbers

McElroy cites examples of buying **Class A properties in Scottsdale for around $260,000 to $300,000 per door**, which he estimates is well below the current cost of new construction. This is the basis for his shift away from older value-add deals — see [[claim-class-c-too-risky]].

He also prefers acquisitions with *problems* over turnkey deals — see [[quote-perfect-property]] ("there's nowhere to go… we're just trying to find stuff that has hair on it").

## Caveats from the Enrichment

- **Replacement cost is not a floor**: in severe downturns (post-2008, early 1990s) assets *do* trade well below replacement cost for extended periods.
- **Local fundamentals matter**: a property below replacement cost in a structurally declining submarket can still be a poor investment.
- The principle is widely accepted in institutional practice (Appraisal Institute cost approach; CBRE/JLL/Cushman feasibility models), but it's a *necessary not sufficient* condition.


## Related across days
- [[concept-margin-of-safety-waterfront]]
- [[framework-deal-evaluation-triad]]
- [[action-buy-below-replacement]]