Range hood requirements depend on your location and kitchen setup, not on a single national rule

Building codes that require range hoods are written by states and cities, not by the federal government, so the answer changes based on where you live and what kind of cooking equipment you have. Most jurisdictions require a range hood or some form of ventilation when you install a gas cooktop or range, but electric cooktops often fall into a gray area where ventilation is recommended but not mandated. Some cities require hoods over all cooking surfaces; others require them only over gas. A few places have no requirement at all, though this is becoming less common.

The reason codes exist is straightforward: gas cooking produces carbon monoxide and nitrogen dioxide, which need to leave the house. Even electric cooking generates steam, grease, and odors that can damage walls and cabinets if they stay inside. Building inspectors check for compliance when you pull a permit for a kitchen renovation or new construction, so knowing your local code before you buy or install equipment saves money and delays.

Key Takeaways

  • Gas cooktops almost always require a range hood or ventilation system under code in most U.S. jurisdictions, while electric cooktops requirements vary widely by location.
  • Your local building department or city code office can tell you the specific requirement for your address in one phone call or email.
  • A range hood must vent to the outside of the house through ductwork; recirculating hoods that filter and return air do not meet code in most places.
  • Inspectors check for code compliance when you pull a permit, so installing equipment without checking first can mean removing and replacing it at your own cost.

How to find your local range hood requirement

Start by calling your city or county building department and asking whether a range hood is required for your specific cooktop type and location. Have your address ready and be clear about whether you have a gas or electric cooktop. Most building departments can answer this question in a few minutes, and many have the information on their website under "kitchen ventilation" or "cooking appliances."

If you cannot reach your building department by phone, send an email with your address and cooktop type. Some departments respond within a day; others take a week. While you wait, you can also check your city's adopted building code online—most cities adopt either the International Residential Code (IRC) or the International Energy Conservation Code (IECC), and these documents are public. Search "[your city name] adopted building code" to find the version your jurisdiction uses.

If you are renting rather than owning, check your lease and ask your landlord whether they have documentation of what the building code requires. Landlords are responsible for code compliance, so they should know whether a hood is required and whether one is installed.

Gas cooktops and range hood requirements

Gas cooking is the most common trigger for a mandatory range hood requirement. Nearly every jurisdiction that has adopted the International Residential Code requires either a range hood or a ventilation system when a gas cooktop or range is installed. The code specifies that the hood must be vented to the outside—meaning the air and combustion byproducts leave the house entirely, not recirculated back into the kitchen through a filter.

The hood must also meet a minimum capacity, usually measured in cubic feet per minute (CFM). Most codes require 100 CFM for a gas cooktop, though some jurisdictions ask for more depending on the size of the cooking surface. Your building department can tell you the CFM requirement for your location. If you are replacing an existing gas cooktop, the old hood may not meet current code, which means you may need to upgrade it even if one already exists.

Electric cooktops and ventilation rules

Electric cooktops sit in a middle ground. Some jurisdictions require ventilation over electric cooktops just as they do for gas; others recommend it but do not mandate it; still others have no requirement at all. This variation is why calling your building department is essential—you cannot assume that because your neighbor's electric cooktop has no hood, yours does not need one.

When ventilation is not required by code, many homeowners still install a range hood or under-cabinet ventilation for comfort and to protect cabinetry from steam and grease. This is a choice, not a code violation. However, if you are pulling a permit for a kitchen renovation, the inspector will check whether your setup meets the code for your location, so you need to know the requirement before you design the space.

Recirculating hoods and code compliance

A recirculating hood (also called a ductless hood) filters grease and odors from the air and returns the air to the kitchen rather than venting it outside. These hoods are popular in apartments and kitchens where running ductwork to the outside is difficult or impossible. However, recirculating hoods do not meet code requirements in most jurisdictions because they do not remove moisture and combustion gases from the house.

If your building code requires a range hood, it almost always means a hood that vents to the outside. A recirculating hood may be acceptable only if your local code explicitly allows it, which is rare. Before you buy a recirculating hood, confirm with your building department that it meets code for your location. If it does not, installing one will not pass inspection, and you will have to replace it with an outside-venting hood.

What happens if you do not have a required hood

If you are selling a house or explore for a renovation permit and your kitchen does not have a range hood when code requires one, the inspector will flag it as a violation. You will then have to install a compliant hood before the sale closes or the permit is approved. This can delay a sale by weeks and cost you money for emergency installation.

If you are not pulling a permit and no inspection is scheduled, a missing hood is not actively enforced by most building departments. However, if there is ever a fire, flood, or insurance claim, the insurance company may investigate whether the kitchen meets code. A missing required hood could affect your claim. Additionally, if you sell the house later, the new owner's inspector may discover the violation, which can derail the sale or require you to credit the buyer for the cost of installation.

Installing a range hood that meets code

Once you know your local requirement, you need a hood that meets the CFM capacity, vents to the outside, and is installed according to code. Most codes specify that ductwork must be rigid or semi-rigid (not flexible dryer vent hose), must be as short and straight as possible, and must have a damper or flapper that closes when the hood is off to prevent outside air from flowing back into the house.

The hood must also be installed at a specific height above the cooktop—usually 24 to 30 inches for a wall-mounted hood, depending on your code. If you are hiring a contractor, ask them to confirm they know your local code requirements and to pull a permit before starting work. If you are doing the work yourself, your building department can tell you the specific installation requirements for your location.

Frequently Asked Questions

Do I need a range hood if I have an electric cooktop?

It depends on your location. Some jurisdictions require ventilation over all cooktops, including electric; others do not. Call your local building department with your address and cooktop type to find out what your code requires. Even if it is not required, many homeowners install a hood for comfort and to protect cabinetry.

Can I use a recirculating hood instead of venting outside?

Not in most places. Building codes almost always require a hood that vents to the outside, not one that filters and recirculates air. Check with your building department before buying a recirculating hood to confirm it meets code for your location—it rarely does.

What if I am renting and my landlord will not install a range hood?

If your local code requires a range hood and your rental does not have one, your landlord is responsible for installing it. Document your request in writing (email is fine) and keep a copy. If your landlord does not respond, contact your local housing authority or tenant rights organization for guidance on how to proceed.

Do I need a permit to replace an existing range hood?

It depends on your location. Some jurisdictions require a permit for any hood replacement; others do not. Call your building department and ask whether a permit is needed for a like-for-like replacement of your existing hood. If you are upgrading to a different type or size, a permit is more likely to be required.

What CFM do I need for my range hood?

Most codes require a minimum of 100 CFM for a gas cooktop, though some ask for more depending on the cooktop size. Your building department can tell you the exact CFM requirement for your location and cooktop. The hood's specifications will list its CFM, so you can match it to your requirement when shopping.