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Roofing in Key Biscayne, Florida

Key Biscayne is a village on its own island, reached by the Rickenbacker Causeway, and its first homes went up from 1951. That gives the village one of the older housing stocks in the county, so many roofs here have been replaced once or more. Your roof's age and the rules that apply to it depend on when your home was built and which permit office handles the work.

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Updated October 2026

Twisted tree on a beach leaning over calm water at dusk with distant buildings on the horizon.
Photo: Key Biscayne Miami Florida Travel Photography by Giuseppe Milo, CC BY 3.0, cropped

At a glance

Key Biscayne homes at a glance

People (2020 Census)
14,809
Median year homes were built
1977
Share of homes built before 1980
59.2%
Share of homes built 2010 or later
4.8%
Owner-occupied share of occupied homes
66.6%

Census figures; each one is listed in the sources at the end of this page.

Housing age

Island housing age and roof age

The median home here was built in 1977, give or take two years. Nearly 60 percent of homes went up before 1980. That suggests many original or early roofs are now well past the age where insurers start asking questions.

If your roof is a soft covering like shingle and is more than 25 years old, Citizens Property Insurance will want records showing at least five years of remaining useful life. For hard roofs such as tile, slate, clay, concrete or metal, the line is 50 years. Ask your insurer or agent which category your roof falls in before you make any assumptions.

Permits and review

Who issues roof permits in Key Biscayne?

Roof permits here come from the Village of Key Biscayne itself, through its Building, Zoning and Planning permitting office. Confirm current requirements with that office before work starts, since the village is not part of the county permit system used elsewhere in Miami-Dade.

A permit does not run forever. Under the Florida Building Code, a permit becomes invalid unless work starts within 6 months of issue, and a stopped job can lapse after 6 months without an inspection. Count the calendar from the day the permit was issued, not from the day your contractor first called.

Building permits

Village of Key Biscayne - Building, Zoning and Planning - Permitting

Official building page

Office names and links only. Fees, forms and timing change; check the official page.

Florida code

Partial roof repairs and the 25 percent rule

Florida's 25 percent rule limits how much of a roof can be repaired or replaced in any 12-month period before the full roof must be brought up to current code. Homes here built before 1980 are the most likely to hit this rule, because a single large repair can trigger it. That exception covers a roof only when its original build or later repair followed the 2007 Florida Building Code or a newer edition.

Miami-Dade is one of two counties in the High Velocity Hurricane Zone, which carries the strict wind provisions adopted after Hurricane Andrew. Key Biscayne's housing stock is largely pre-1980, and the village is inside that zone, so the wind rules here are not optional extras.

  • Village on the island of Key Biscayne, reached by the Rickenbacker Causeway; homes went up from 1951.
  • After Hurricane Irma (2017), soil sampled up to one block from the coast on Key Biscayne was moderately saline.
  • 75.2% of housing units are in buildings with 10 or more units.
  • 23.7% of all housing units are vacant and held for seasonal, recreational or occasional use.

Weather and rain

Storms and rain on Key Biscayne

The Atlantic hurricane season runs June 1 through November 30, and its statistical peak falls on September 10. Hurricane Irma in 2017 flooded low ground along Biscayne Bay, with surge reaching 4 to 6 feet above ground. After Irma, soil sampled within a block of the coast on Key Biscayne was moderately salty, which matters for metal fasteners and coatings.

Rain is heavy here. At Miami International Airport, a 10-year storm drops 3.36 inches in one hour, and a 24-hour 10-year storm brings 7.93 inches. Most of the yearly rain falls May through October. Clear gutters and downspouts before June.

Services

Roofing services in Key Biscayne

Questions

Key Biscayne roofing questions

What is the 25% roof rule in Florida?

The 25 percent rule says no more than 25 percent of a roof may be repaired, replaced or recovered in any 12-month period unless the entire roof system is brought to current code. On Key Biscayne, where many homes were built before 1980, a single larger repair can trigger it. The rule has an exception for roofs built or repaired to the 2007 Florida Building Code or later. Ask the village permit office how it applies to your roof.

Source: 2023 Florida Building Code, Building, 8th ed., Chapter 15 (UpCodes viewer, unofficial transcription), read Oct 5, 2026

Related: Roof replacement

How old are most homes on Key Biscayne?

The median home on Key Biscayne was built in 1977, and about 59 percent of homes went up before 1980. In this area, a good number of roofs are probably beyond the 25-year mark. If your roof is shingle and older than 25 years, your insurer may ask for documentation of five years of remaining useful life.

Source: U.S. Census Bureau, American Community Survey 2024 5-year estimates (2020-2024), table B25035, via Census Reporter API, read Oct 5, 2026

Related: Roof inspections

Who issues roof permits on Key Biscayne?

Roof permits come from the Village of Key Biscayne Building, Zoning and Planning permitting office. Confirm current fees, forms and inspection steps with that office before you begin, because the village permitting process is separate from the county system.

Source: Village of Key Biscayne - Building, Zoning and Planning - Permitting, read Oct 5, 2026

Related: Roof replacement

Do roof permits expire on Key Biscayne?

Under the Florida Building Code, a roof permit on Key Biscayne becomes invalid unless work starts within 6 months of issue. A job suspended or abandoned for 6 months can also lapse. To stay in active status, a job needs an approved inspection on file within 180 days. Many homes on the island were built around 1977, so older roofs often come up for replacement while permits are still open. Check the issue date on your permit card and call the village office if work has stalled.

Source: 2023 Florida Building Code, Building, 8th ed., Chapter 1 (UpCodes viewer, unofficial transcription), read Oct 5, 2026

Related: Roof replacement

How much rain falls on Key Biscayne?

At Miami International Airport, a 10-year storm drops 3.36 inches of rain in one hour and 7.93 inches in 24 hours. The area averages about 67 inches a year, and roughly 77 percent of it falls May through October. Clear gutters and check flashing before the rainy season.

Source: NOAA Atlas 14 Volume 9 version 2, partial-duration intensity estimates at the Key Biscayne 2020 Census internal point (25.6907, -80.1656), read Oct 5, 2026

Related: Gutters

Nearby

Near Key Biscayne

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Miami-Dade County

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Sources for this page(24)
  1. 1.Median year homes were built: 1977. U.S. Census Bureau, American Community Survey 2024 5-year estimates (2020-2024), table B25035, via Census Reporter API. Read Oct 5, 2026.
  2. 2.Share of homes built before 1980: 59.2%. U.S. Census Bureau, American Community Survey 2024 5-year estimates (2020-2024), table B25034, via Census Reporter API. Read Oct 5, 2026.
  3. 3.U.S. Census Bureau, American Community Survey 2024 5-year estimates (2020-2024), table B25035, via Census Reporter API. Read Oct 5, 2026.
  4. 4.U.S. Census Bureau, American Community Survey 2024 5-year estimates (2020-2024), table B25035, B25034, B25024, via Census Reporter API. Read Oct 5, 2026.
  5. 5.Permit office: Village of Key Biscayne - Building, Zoning and Planning - Permitting. Village of Key Biscayne - Building, Zoning and Planning - Permitting. Read Oct 10, 2026.
  6. 6.Wikipedia, 'Key Biscayne, Florida' (revision 1375547449). Read Oct 5, 2026.
  7. 7.NOAA National Hurricane Center, Tropical Cyclone Report: Hurricane Irma (AL112017). Read Oct 5, 2026.
  8. 8.Florida Building Commission, 'Setting New Standards for Safety: The Florida Building Code' (2004 publication; wind-speed figures in it are outdated and not used). Read Oct 5, 2026.
  9. 9.NOAA National Hurricane Center, Tropical Cyclone Climatology. Read Oct 5, 2026.
  10. 10.Hurricane Irma (2017). NOAA National Hurricane Center, Tropical Cyclone Report: Hurricane Irma (AL112017). Read Oct 5, 2026.
  11. 11.NOAA NCEI U.S. Climate Normals 1991-2020 (access data service). Read Oct 5, 2026.
  12. 12.NOAA NCEI U.S. Climate Normals 1991-2020 (access data service). Read Oct 5, 2026.
  13. 13.People (2020 Census): 14,809. U.S. Census Bureau, 2020 Census counts (POP100, HU100) via TIGERweb tigerWMS_Census2020 layer 26 (Incorporated Places). Read Oct 5, 2026.
  14. 14.Share of homes built 2010 or later: 4.8%. U.S. Census Bureau, American Community Survey 2024 5-year estimates (2020-2024), table B25034, via Census Reporter API. Read Oct 5, 2026.
  15. 15.Owner-occupied share of occupied homes: 66.6% (3,291 of 4,945). U.S. Census Bureau, American Community Survey 2024 5-year estimates (2020-2024), table B25003, via Census Reporter API. Read Oct 5, 2026.
  16. 16.U.S. Census Bureau, American Community Survey 2024 5-year estimates (2020-2024), table B25024, via Census Reporter API. Read Oct 5, 2026.
  17. 17.U.S. Census Bureau, American Community Survey 2024 5-year estimates (2020-2024), table B25004, via Census Reporter API. Read Oct 5, 2026.
  18. 18.Citizens Property Insurance Corporation, inspections FAQ (updated 2026-03-17), Citizens Property Insurance. Read Oct 4, 2026.
  19. 19.Village of Key Biscayne - Building, Zoning and Planning - Permitting, Village of Key Biscayne. Read Oct 5, 2026.
  20. 20.2023 Florida Building Code, Building, 8th ed., Chapter 1 (UpCodes viewer, unofficial transcription), UpCodes (Florida Building Code transcription). Read Oct 5, 2026.
  21. 21.2023 Florida Building Code, Building, 8th ed., Chapter 15 (UpCodes viewer, unofficial transcription), UpCodes (Florida Building Code transcription). Read Oct 5, 2026.
  22. 22.Florida Administrative Code, Chapter 61G20-3, Florida Administrative Code. Read Oct 5, 2026.
  23. 23.NOAA Atlas 14 Volume 9 version 2, partial-duration intensity estimates at the Key Biscayne 2020 Census internal point (25.6907, -80.1656), NOAA Hydrometeorological Design Studies Center. Read Oct 5, 2026.
  24. 24.NOAA Atlas 14 Volume 9 version 2, partial-duration 24-hour depth estimates at the Key Biscayne 2020 Census internal point (25.6907, -80.1656), NOAA Hydrometeorological Design Studies Center. Read Oct 5, 2026.

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