How Much Does a Sunroom or Enclosure Cost in St. Johns County, FL?
St. Johns County sunroom costs range from $4,600 to $50,600. Get local pricing for 3-season, 4-season sunrooms, and screen enclosures.
What homeowners in St Johns County actually pay.
Local market ranges built from regional labor, materials, and permitting data — not national averages.
Screen Porch Enclosure (200 sq ft)
3-Season Sunroom (200 sq ft)
4-Season Sunroom (200 sq ft)
National avg $9,000 × 0.92x local adjustment = $8,280
The St Johns County numbers, card by card.
Local cost, labor, and climate-risk data for St Johns County, FL — the same cards we publish to social, built from federal datasets.
Why St Johns County prices look like this.
Local Labor Costs for Sunroom Construction
Storm and Hazard Considerations
Climate Zone and Year-Round Comfort
Energy Costs and Efficiency
Financing Your Sunroom Project
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Questions buyers ask about sunrooms and enclosures in St Johns County.
Short answers to the most common things we hear about local pricing, scope, and timing.
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What is the average cost of a sunroom in St. Johns County?
A 3-season sunroom (200 sq ft) averages $20,240 in St. Johns County, while a fully climate-controlled 4-season sunroom averages $34,960. Screen porch enclosures are the most affordable option at approximately $8,280 for the same size.
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Why are sunroom costs lower in St. Johns County than the national average?
Local carpenter wages average $25.59 per hour, compared to the national average of $29.58 per hour. This wage differential creates a 0.92x local adjustment factor, reducing labor costs by about 8% compared to national pricing.
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Do sunrooms in St. Johns County need hurricane-rated windows?
Yes. With a hurricane risk score of 93.70 (Relatively High), St. Johns County building codes require impact-rated glazing or approved shutter systems. Sunroom windows must withstand wind speeds of 130 mph or higher in most areas.
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Is a 3-season or 4-season sunroom better for Florida?
Three-season sunrooms work well for roughly nine months in St. Johns County, avoiding summer's peak heat. However, with 2,758 cooling degree-days annually, a 4-season sunroom with AC provides year-round comfort, though it adds $40 to $80 monthly to summer electric bills.
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How much does electricity cost to run a sunroom AC in St. Johns County?
At the current Florida rate of $0.158 per kWh, running AC in a 4-season sunroom adds $40 to $80 per month during summer. Mini-split systems with zone control offer better efficiency than extending your main HVAC system.
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What financing options exist for sunroom projects in St. Johns County?
Home equity loans or HELOCs are popular with 30-year mortgage rates at 6.36%. On the county's median home value of $457,600, a $35,000 sunroom financed over 20 years costs approximately $220 per month. Some contractors offer promotional financing as well.
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Will adding a sunroom increase my property taxes?
Yes, a permitted sunroom increases your assessed home value, raising property taxes. St. Johns County homeowners pay a median of $3,547 annually in property taxes. The increase depends on your sunroom's value relative to your current assessment.
How these numbers were built.
Cost estimates are derived from government data including the U.S. Census Bureau (ACS), Bureau of Labor Statistics (OEWS), FEMA National Risk Index, EIA energy data, IECC climate zone classifications, Federal Reserve (FRED), and HUD Fair Market Rents.