South Florida’s residential rental market experienced unprecedented expansion between 2020 and 2023. Driven by strong population in-migration, corporate relocations, and constrained inventory, annual rent increases across Broward and Palm Beach Counties frequently exceeded 10% to 15%. However, using those historical peak numbers as a baseline in today’s underwriting models is a fast path to negative monthly cash flow.
As full-time operators in South Florida since 2009, The Jamie Seneca Team has evaluated acquisitions across multiple market cycles. Today’s investor market requires a return to disciplined, fundamentals-based underwriting. Here is how to evaluate rent growth trends in Broward and Palm Beach Counties to build durable, cash-flowing portfolios.
The Shift to Normalized Rent Growth
The rapid rental expansion in markets like West Palm Beach, Fort Lauderdale, Boca Raton, and Hollywood has transitioned into a stabilization phase. Inventory additions—particularly in the class-A multifamily space—alongside standard affordability ceilings have moderated price growth.
When modeling acquisitions today, projecting top-line rent growth at historical 8% to 10% rates over a 5-year hold will artificially inflate your projected exit cap rate and internal rate of return (IRR).
A conservative underwriting framework for South Florida single-family rentals (SFR) and 2–4 unit small multifamily properties currently models top-line rent growth at:
- Year 1: 0% to 2% (accounting for lease-up or existing tenant renewals)
- Years 2–3: 2.5% to 3.5% (aligning with local wage growth)
- Years 4–5: 3.0% long-term terminal growth rate
Stress Testing Cash-on-Cash and Cap Rates: A Worked Example
To understand how rent growth assumptions impact performance, consider a real-world scenario for a single-family asset or multi-family door purchased in Broward County.
- Acquisition Price: $450,000
- Down Payment (25%): $112,500
- In-Place Monthly Rent: $3,100 ($37,200 Gross Annual Rent)
- Debt Terms: 6.75% interest rate, 30-year amortization ($2,189/month principal & interest)
Underwriting Operating Expenses (OpEx)
In South Florida, expense ratios frequently run between 35% and 50% of gross revenue due to unique regional cost drivers. A realistic OpEx breakdown includes:
- Property Taxes: $8,100 (Re-assessed at ~1.8% to 2.0% of purchase price post-closing)
- Property & Windstorm Insurance: $4,500 (Crucial to get actual quotes during due diligence)
- Vacancy Factor (5%): $1,860
- Property Management (8%): $2,976
- Repairs & Maintenance / CapEx Reserve (8%): $2,976
- Total Annual OpEx: $20,412 (54.8% expense ratio including tax/insurance resets)
Net Operating Income (NOI) = $37,200 - $20,412 = $16,788 Entry Cap Rate = $16,788 / $450,000 = 3.73% Annual Debt Service = $26,268 Initial Net Cash Flow = -$9,480
The Impact of Growth Assumptions
If an investor underwrites aggressive 7% annual rent growth, year 3 gross rent reaches $42,593. Assuming expenses grow at 3%, NOI rises to $20,968. Net cash flow remains tight, but trends toward break-even.
However, if actual market rent growth anchors at 2.5%, year 3 gross rent only reaches $37,825. NOI stays around $16,800 after expense inflation, leaving the property in persistent negative cash flow unless equity injection is increased or the acquisition price is negotiated down to yield an entry cap rate closer to 6.0%.
Account for South Florida Expense Inflation
Underwriting rent growth is only half of the equation; operating expense inflation in Broward and Palm Beach Counties currently outpaces national averages.
1. Property Tax Resets: Florida’s "Save Our Homes" cap protects homesteaded seller taxes, but upon transfer, taxes reset to full market value. Always underwrite taxes based on the new purchase price, not the seller's historical tax bill. 2. Windstorm and Hazard Insurance: Insurance costs in South Florida must be underwritten with an annual expense inflation rate of 5% to 8%, even if rent growth is modeled at 2.5%. 3. Deferred Maintenance and Roof Life: Insurers in South Florida often mandate roof replacements at 15 to 20 years for asphalt shingles. Factor imminent CapEx items directly into purchase price deductions rather than relying on future cash flow.
Strategic Takeaways for Buyers
To maintain positive cash flow and build long-term equity in South Florida:
- Buy on current yield, not future projection: Ensure the entry cap rate provides an acceptable risk-adjusted return based on day-one in-place leases.
- Match rent growth to local wage fundamentals: Target submarkets with strong median household income growth within Palm Beach and Broward Counties to support rental rate sustainability.
- Underwrite double-digit expense growth buffers: Assume insurance and taxes will consume a larger percentage of your gross rental income over time.
Navigating local market nuances requires granular data and experience. Working across Broward and Palm Beach Counties since 2009, The Jamie Seneca Team helps investors underwrite acquisitions accurately so capital is deployed safely and profitably.