Does Artificial Turf Count as Impervious Surface?

This page is for homeowners whose lot is near its impervious coverage limit, or who pay a stormwater fee based on hard surface, and want to know whether a turf lawn will push them over. We read the code text or official guidance in nine places and sorted them into the four ways codes handle turf, then set out the specs that move turf between them.

Why would turf count as impervious if it drains?

Because codes classify surfaces by definition and policy, not by lab drainage numbers. A hole-punched backing passes around 30 in/hr, far more than any storm delivers (see drainage rates explained), but water still has to get through a compacted base and into the soil, which our layer-by-layer drainage guide shows is usually the real limit.

Some cities count turf for reasons unrelated to water. Shorewood, Minnesota's impervious surface handout says permeable pavers and artificial turf "are also considered impervious as they remove habitat and natural vegetation and are frequently left unmaintained by property owners." No drainage test answers that reasoning.

How do cities classify artificial turf?

These are the rules we read. They fall into four groups.

The groups, from strictest to most lenient:

1. Always impervious (Shorewood, Winter Park, Pittsburgh's fee). Specs do not matter.
2. Pervious only if built to a standard (Tampa, Pompano Beach, the Dallas proposal). You have to prove it.
3. Pervious unless something blocks water (Lake Stevens). A plastic sheet or sealed underdrain flips it.
4. Pervious, but still counted (Bunker Hill Village's draft). It caps impermeable area at 45% and total lot coverage at 55%, "both impermeable and permeable surfaces," so turf escapes the first cap but not the second.

If your city is not in the table, assume nothing. Most codes do not name turf, so the answer turns on how staff read the general definition of impervious surface.

What does it take for turf to count as pervious?

Where a code sets a pervious standard, it is mostly about the base and soil, not the turf. Tampa's synthetic turf guidelines list every condition, and turf that misses any one "shall not qualify as pervious area":

• The turf, any filter fabric and every other layer must pass 10 inches per hour. Visqueen and similar sheets are prohibited.
• A reservoir layer of 4 inches or more of clean stone: washed granite, limestone or crushed concrete meeting FDOT #89, #57 or #4. #89 is the minimum gradation, and "Screenings are not permitted."
• "The underlying soils shall remain uncompacted."
• A supplier's aggregate testing report proves the gradation at inspection.
• Infill is clean silica sand or zeolite only.

Pompano Beach's ordinance counts turf as pervious on lots of one acre or less with 30 in/hr permeability, at least 3 inches of compacted porous crushed rock, 1.5 inch pile, 56 oz face weight, an eight-year warranty and an engineer-sealed stormwater plan. Otherwise turf "may always be permitted as an impervious surface" within the district's coverage limits.

Clean open-graded stone is too coarse to lay turf on directly, so plan for a thin fine cap if your code allows one, and price the deeper stone with the base material calculator.

What changed in Florida in 2026?

Florida now has a statewide floor. Section 125.572, Florida Statutes (2025, amended 2026) told the Department of Environmental Protection to set installation standards for single-family lots of 1 acre or less, after which local governments may not prohibit compliant turf or regulate it "inconsistent with" those standards.

DEP's Rule 62-308.100 took effect May 19, 2026. Turf "must be permeable and affixed to permeable backing with a pervious subgrade," and "A local government may establish a quantifiable standard of a maximum of 10 inches per hour for all layers." Subgrade "shall be washed prior to installation to prevent fines from binding," and the soil beneath must not be compacted "to the extent that it adversely impacts percolation." Absent a local buffer, turf stays 10 feet from a waterbody unless a seawall or bulkhead intervenes. The rule also bars heavy metals and intentionally added PFAS (see PFAS turf laws by state).

Three practical effects:

• 10 in/hr is the most a Florida city can demand. Tampa sits exactly at it. Pompano Beach's 30 in/hr is higher, but its ordinance says that where it is inconsistent with DEP's standard, "the Department standard shall prevail."
• Older ordinances predate the rule. Winter Park's 2023 ordinance counts all turf as impervious and keeps it 50 feet from any water body; we have not seen how the city applies it since May 2026, so ask the permit desk.
• It does not reach HOAs, condos or commercial lots. DEP's FAQ says the rule "does not address HOA requirements" (see our HOA turf laws by state), and DEP issues no permits and does no inspections.

Our Florida guide covers the water table issues that shape the base there.

How much turf can I add before I hit my limit?

Coverage is total impervious area divided by lot area. Run it before you choose a layout.

In Tampa the stakes are different. The city's manual requires 1/2 inch of stormwater retention on residential lots that exceed 50% total impervious coverage. On an 8,000 sq ft lot with 3,800 sq ft of hard surface (47.5%), 600 sq ft of turf that misses the pervious spec takes it to 4,400 sq ft, 55%, and triggers retention. Built to the spec, the turf counts as 0% and the lot stays at 47.5%.

Will artificial turf raise my stormwater fee?

It can, where the fee is billed on impervious area. Pittsburgh Water lists "athletic facilities and artificial turf" among impervious surfaces, and its 2026 monthly residential fee steps up by tier: $5.75 from 400 to under 1,015 sq ft, $11.50 from 1,015 to under 2,710 sq ft, and $22.99 at 2,710 sq ft or more.

A home with 1,800 sq ft of roof and paving that adds 600 sq ft of turf reaches 2,400 sq ft and stays in Tier 2. Add 1,000 sq ft instead and it reaches 2,800 sq ft, moving to Tier 3: $11.49 more a month, about $138 a year. Tiered fees create cliffs, so a slightly smaller lawn can avoid the jump. Add it to the running costs in our rebates, HOA and water rules guide.

Our rule: decide the classification before the design

The sales argument that turf drains faster than rain, so it must be pervious, answers the wrong question. The code decides the column; the spec decides whether you can move columns.

1. Ask the planning office in writing whether turf counts as impervious and whether any standard makes it pervious. Ask the stormwater utility separately about fees.
2. If it is always impervious, size the lawn to your remaining coverage and skip the pervious build.
3. If there is a standard, price that base, not the usual road base, and ask for a cross-section in every quote.
4. Test your soil anyway. Pervious on paper does not make clay drain; see testing drainage.

This page reports the cited texts on the dates shown. Two entries are a proposal and a draft, and staff interpretations can differ from a handout, so confirm before you build.

Frequently asked questions

Does a permeable backing make turf pervious in the eyes of the city?

Not by itself. Every pervious standard we read regulates the layers below the turf too: Tampa requires 10 in/hr through all layers, clean stone and uncompacted soil, and Florida's state rule requires a washed, pervious subgrade. A fully permeable backing helps meet those rules but cannot rescue a compacted, fine-rich base. In cities that count turf as impervious by definition, such as Shorewood, backing type is irrelevant.

Does turf count toward lot coverage in a front yard?

Usually under the same rules as the rest of the lot, but some places add front-yard limits. Dallas's proposed amendment applies a 40% impervious cap to the required front yard when more than 200 sq ft is added, and Bunker Hill Village's draft bars turf from the required front yard outright. Our front yard guide covers designs that pass review.

Is the Florida rule a reason my city must count turf as pervious?

The rule requires compliant turf to be permeable on a pervious subgrade and bars local rules inconsistent with DEP's standards on single-family lots of 1 acre or less. It does not say in so many words how cities must score turf in coverage math. If your city still treats compliant turf as impervious, ask in writing which part of Rule 62-308.100 it relies on.