Investing in St. Johns County, FL Real Estate: The Actual Numbers
Considering rental property in St. Johns County, FL? The typical home ($492,885, Zillow) against typical rent ($2,116/mo, Zillow Observed Rent Index) works out to a 5.2% gross cap rate. Gross is where analysis starts, not ends — below is the investor cost stack that turns it into a real number, and the demand-and-supply data that decides whether the rent holds.
St. Johns County yield at a glance
The investor cost stack, worked
Start with $25,389 of gross annual rent. Property tax: investors get NO homestead exemption and no 3% cap — at St. Johns County’s typical 13.47 mills on a $492,885 assessment, roughly $6,638 a year (non-homestead assessments can still rise up to 10% annually). Insurance: Citizens averages about $1,378/yr here, and landlord (DP-3) policies typically price above owner-occupied. That already takes the yield to about 3.52% before vacancy, maintenance, management and any HOA — the line items that separate real operators from spreadsheet optimists.
Will the rent hold? Demand and supply
Rent growth here is running +1.3% (Zillow index). On demand, IRS migration data shows a net 10,642 people per year into the county; on supply, builders pulled 4,735 residential permits in 2025. Rising rents plus positive migration plus a restrained pipeline is the configuration that protects yields; the reverse erodes them. Our valuation model currently reads the county as undervalued by 5.7% versus income-and-rent fundamentals.
Where investors actually buy here
Community-level medians, days on market and price trends for every tracked St. Johns County community are on the county’s community and lifestyle pages — start with the affordability ranking and the county rent page (full rent-versus-own math).
The St. Johns County market, in context
St. Johns County is the premium county of Northeast Florida and home to the #1-rated public school district in the state. Anchored by historic St. Augustine, the Ponte Vedra Beach golf-and-ocean corridor, and the explosive Nocatee and SilverLeaf master plans along the World Golf Village spine, it commands the region's highest prices — and its fastest population growth. Buyers pay a premium here for schools, new construction, and a beach-adjacent lifestyle.
The economy behind the market: {'drivers': 'healthcare, professional golf, education, tourism, and professional services', 'summary': "St. Johns blends a fast-growing healthcare and professional-services base with two unusual anchors: the PGA Tour, headquartered in Ponte Vedra Beach alongside THE PLAYERS Championship at TPC Sawgrass, and a heavy commuter relationship with Duval's Jacksonville job market. Flagler Health+ / UF Health St. Johns is a major local employer, the county school district is itself one of the largest employers, and tourism around St. Augustine — the oldest city in the U.S. — runs year-round. Many residents earn Duval-Southside paychecks while living for the schools and beaches.", 'employers': ['St. Johns County School District', 'Flagler Health+ / UF Health St. Johns', 'PGA Tour (Ponte Vedra Beach HQ)', 'St. Johns County government', 'Northrop Grumman', 'VyStar Credit Union', 'Publix', 'Walmart', 'World Golf Village / hospitality'], 'jobNote': 'The PGA Tour is headquartered in Ponte Vedra Beach, home of THE PLAYERS Championship at TPC Sawgrass.'}
What could change it: The headline risks are price and water. St. Augustine and the barrier islands flooded in Hurricanes Matthew (2016) and Irma (2017), so storm surge and flood-zone status are central to true cost near the coast and the rivers. Affordability is stretched — this is the most expensive county in the region — and rapid growth in the Nocatee/SilverLeaf corridor is straining roads and schools even as the district adds capacity. Insurance, as everywhere in coastal Florida, is rising.
Near-term outlook: Expect St. Johns to stay among the most resilient markets in Northeast Florida over the next 12 months. School demand and in-migration keep a firm floor under prices, but affordability at the top of the regional range and rate sensitivity will keep appreciation modest and lengthen days on market on anything mispriced. New-construction volume in Nocatee and SilverLeaf gives buyers real leverage on builder inventory.
Run the numbers in St. Johns County
Common questions
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Figures from Zillow research series, Zillow Observed Rent Index, verified county millage, Citizens Property Insurance, IRS SOI migration and Census permits, as of 2026-06-16; deemed reliable but not guaranteed. Informational only - not investment, tax or legal advice. Equal Housing Opportunity.