Sight triangle rules on Miami-Dade corner lots: the 2.5-foot height limit and the visibility triangle explained

If your Miami-Dade property is on a corner lot, the fence rules that apply within a specific triangular zone near the intersection are stricter than the rules that apply on the rest of the property. The rule is governed by Section 33-11(c) of the County Code and is enforced consistently across unincorporated Miami-Dade and most incorporated municipalities. Violating it produces some of the fastest code-enforcement citations because it's a public-safety issue — sight obstruction at intersections directly affects traffic visibility.

This article walks through what the rule actually says, how the visibility triangle is measured, the table the county uses to determine its size, and how to know whether your corner lot is affected.

What the code actually says

From Miami-Dade County Code Section 33-11(c):

Fences, walls, bus shelters or hedges shall not exceed two and one-half (2.5) feet in height within the safe sight distance triangle, as defined below. The height of fences, walls, bus shelters and hedges shall not exceed two and one-half (2.5) feet in height within ten (10) feet of the edge of driveway leading to a public right-of-way.

And:

The safe sight distance triangle area shall not contain obstructions to cross-visibility at a height of two and one-half (2.5) feet or more above pavement; potential obstructions include, but are not limited to, structures, grass, ground covers, shrubs, vines, hedges, trees, rocks, walls and fences.

Two distinct rules embedded here:

1. Corner lots — the sight triangle at the intersection — nothing taller than 2.5 feet (30 inches) inside the triangular zone near the corner
2. Any lot with a driveway — the 10-foot driveway clearance — nothing taller than 2.5 feet within 10 feet of either edge of any driveway leading to a public right-of-way

Notice the broad coverage: it's not just fences and walls. It explicitly includes shrubs, hedges, trees, ground cover, and grass. A boxwood hedge growing past 30 inches inside the sight triangle is a violation just as surely as a 6-foot wood fence would be.

How big is the sight triangle? It depends on the street classification

The county uses the following table to determine the size of the sight triangle. The values depend on what kind of street the corner sits at:

How to read the table: the visibility distances are measured from the centerline of the minor (smaller) street, along the right-of-way line of the through (larger) street. The depth on the minor street is measured from the right-of-way line of the through street, along the centerline of the minor street.

In practical terms:

• If your corner sits at the intersection of two local streets (both 50 feet wide or less), the sight triangle "lies within the public right-of-way" — meaning no private-property restriction applies because the triangle is entirely on the city's portion of the corner.
• If your corner sits at the intersection of a local street and a collector (a wider through-street with a 60–70 foot right-of-way), the triangle extends 190 feet down the through street to one side, 40 feet to the other, and 7 feet onto the minor street side. Anything inside that triangle on your property is restricted to 2.5 feet.
• If your corner sits at the intersection of a local street and an arterial (80+ foot right-of-way — major roads), the through-street measurement extends to 260 feet.

The 10-foot driveway clearance — applies to EVERY lot, not just corners

The driveway portion of the rule applies to all properties with a driveway leading to a public right-of-way — not just corner lots. Within 10 feet of either edge of the driveway, the same 2.5-foot height limit applies.

This is the rule that catches the most homeowners off guard. A 6-foot privacy fence that extends to the edge of the driveway needs to step down to 2.5 feet within 10 feet of where the driveway meets the public street. Failing to do so is a common Notice of Violation trigger, especially on properties where the homeowner added a driveway gate or extended a fence after the original construction.

How to know your street's classification

Functional classification of streets in Miami-Dade is documented by the Public Works Department. The simplest ways to verify:

• Call Miami-Dade Public Works — they can tell you the classification of any street segment
• Check the right-of-way width — your property survey shows the right-of-way width adjacent to your lot. 50 feet or less = local. 60–70 feet = collector. 80+ feet = arterial. Right-of-way width is a strong proxy for classification.
• Look at the street visually — local streets have one travel lane in each direction and no center turn lane. Collectors are often two lanes each way or one lane each way plus parking. Arterials are major commuting routes — Coral Way, Bird Road, Kendall Drive, US-1, LeJeune Road, NW 36th Street, etc.
• Order a survey if your most recent one is more than 5 years old. The current right-of-way information is required for any fence permit on a corner lot regardless.

What the rule means for actual projects

Three common scenarios:

Privacy fence on a corner lot, intersection of two local streets

No sight-triangle restriction on your property — the triangle is in the public right-of-way. Standard fence rules apply (6 feet rear/side yard, 4 feet front yard in most residential zones). The 10-foot driveway clearance still applies where your driveway meets the street.

Privacy fence on a corner lot, intersection of local and collector

The sight triangle is real and on your property. The 6-foot privacy fence has to step down to 2.5 feet within the triangle — usually accomplished with a decorative low-fence section at the corner, then stepping up to full height further from the intersection. Plus the 10-foot driveway clearance.

Hedge on a corner lot

Same rule, same triangle. The hedge cannot exceed 2.5 feet within the sight triangle, regardless of how slow it grows. The county Director may authorize taller hedges for windbreaks on agricultural property (Section 33-11(i)) but standard residential lots don't qualify.

Waivers

Section 33-11(c) includes a provision for waivers:

Table interpretations and waivers of the above requirements shall be made in writing by the Director of the Public Works Department.

Waivers are possible but uncommon — they're typically granted only when the sight triangle measurements produce an absurd result (a tiny lot where the rule would prohibit any fence) or when alternative engineering controls (traffic mirrors, mid-block crosswalks, etc.) provide equivalent visibility. Waivers require a written application and a formal Public Works review.

If you've been cited for a sight-triangle violation

The resolution sequence:

1. Verify the citation — confirm the actual measurements of the sight triangle on your property, the actual height of the offending structure or vegetation, and that your street's functional classification matches what the inspector cited
2. Choose the resolution — typically either step down the fence/wall to 2.5 feet within the triangle, or trim the hedge/vegetation
3. Document the correction — photographs with measurements, dated
4. Request re-inspection within the cure period (typically 30–60 days)

Most sight-triangle citations resolve in 30–60 days with minor corrective work. If your fence was originally permitted but the sight triangle has changed (street reclassified, neighboring property added a driveway), a written waiver request may be appropriate before incurring the cost of modification.

Permit Solutions Services is a Miami-based specialist firm resolving permit violations, after-the-fact permits, and complex compliance cases across Miami-Dade and Broward counties. For fence permit coordination, sight-triangle waiver requests, or after-the-fact resolution, request a free MyHausFax™ Snapshot or call 305-600-9422.