CalculateRealEstateROI

Multifamily · Guide

Multifamily Resource Center

Calculators, market data, and reporting tools for multifamily underwriting and ops.

Reviewed by Keiron Brown, Founder & Editor, CalculateRealEstateROI · Educational estimates only — not investment, financial, tax, or legal advice

Key takeaways

  • Cap rate + Rental ROI for underwriting.
  • Best Multifamily Markets ranking.
  • Investment Atlas for state-level employment trends.
  • Investment Committee Report for capital raises.
  • Stress Test for downside.

Core concepts

Underwriting

Cap rate + IRR model.

Market

Rankings + Atlas + CoStar.

Reporting

IC Report + quarterly investor update.

Step-by-step framework

  1. 1Cap rate calculator.
  2. 2Best Multifamily Markets.
  3. 3Atlas state pages.
  4. 4Generate IC Report.

Common mistakes to avoid

  • Spreadsheet-only underwriting.
  • Ignoring submarket data.

Frequently asked questions

CoStar required?

Yes at 50+ units.

Best ranking?

Best Multifamily Markets.

Premium report?

IC Report for capital raise.

Quarterly cadence?

Standard.

Action checklist

  • ☐Cap rate calc.
  • ☐Atlas review.
  • ☐CoStar subscription.
  • ☐IC Report.

More from Multifamily Investing

Multifamily Investing Best Practices
Multifamily lives or dies on T-12 verification, expense ratio discipline, and capital stack.
Common Multifamily Mistakes
Most multifamily losses trace to undervetted T-12, optimistic value-add, or wrong debt.
Beginner's Multifamily Guide (5–20 units)
Small multi entry — residential financing, hands-on management, learning the operating playbook.
Advanced Multifamily Strategy
Syndication, fund formation, and institutional capital — scaling beyond personal balance sheet.
Multifamily Underwriting Framework
T-12 verification, expense normalization, exit cap rate, and IRR modeling — the core process.
Value-Add Strategies
Renovate units, reduce expenses, or rebrand — three levers that drive NOI growth.