Can I have a drain in my garage?

Author: Lavern Simonis  |  Last update: Wednesday, July 8, 2026

All municipalities have their own specific codes and guidelines for installing drains into garage floors, therefore it may or may not be an option. Most restrict floor drains due to the runoff of toxins, oil, and gasoline that can potentially infiltrate the greater sewer system.

Is it illegal to have a drain in your garage?

Many cities do not allow the installation of garage drains. Instead, garage floors may be sloped so that any water can run out of the garage on its own or be swept and squeegeed out. If that water isn't dealt with, either by a drain or by you, it could make the floor slippery and potentially cause accidents.

Can you add a drain to an existing garage?

Garages are no different than homes and businesses; they require the same protection to keep the space safe and dry, but drain systems don't always come pre-installed on the garage floor. A retrofit floor drain from Slot Drain is an easy installation that can help save you thousands of dollars in damage.

How much does it cost to put a drain in a garage?

The average cost to install a trench drain is $30 to $150 per linear foot, depending on the grate and channel material (plastic, metal, or concrete).

What to do if garage doesn t have a drain?

If the water pooling in your drain-less garage isn't a huge problem but more of a minor inconvenience, you can consider installing garage floor matting that has drainage channels built in. These interlocking tiles can guide the water away from your garage, at least offering a temporary solution for moisture management.

It cleans the drain better than a machine. The stench disappears

Can you put a drain in your garage?

All municipalities have their own specific codes and guidelines for installing drains into garage floors, therefore it may or may not be an option. Most restrict floor drains due to the runoff of toxins, oil, and gasoline that can potentially infiltrate the greater sewer system.

Can I run plumbing to my garage?

Yes, you can run plumbing to your garage. It's normally done by taking a part of your home's existing plumbing and running an underground line to connect it to a new plumbing system in your garage. You can run plumbing to an attached or detached garage.

How much to add plumbing to a garage?

Adding plumbing to a detached garage or shed costs $1,100 on average. Most spend between $900 and $1,300. Adding plumbing to a detached garage or shed roughly 20 feet away from home will cost $1,100 for the average homeowner.

What is a garage drain called?

Garage floor drains can be trench drains.‍

Square drains, also sometimes round drains, can range in size from 6 inches to 1 foot around. Square drains usually use PVC pipe for residential and steel for commercial purposes. Trench drains, also called channel drains, can be used as garage floor drains as well.

Can you add a drain to existing concrete?

Yes, you can add a trench drain to existing concrete.

Can you have a manhole in a garage?

Sometimes an inspection chamber or manhole needs to be installed within the boundary walls of the house - often in a conservatory or a garage, or even in a kitchen extension. Our internal use manholes incorporate a seal that prevents sewer gases and drain odours from escaping the drainage system.

What kind of pipe do I need for a garage drain?

If you're using a PVC piping system, use a PVC drain, while an ABS system requires an ABS drain. For general-purpose PVC or ABS usage, Oatey offers drains like the Oatey® Hub PVC General Purpose Drain and the Oatey® ABS General Purpose Drain. Both feature an adjustable barrel assembly to meet the finished floor height.

Do I need permission to connect to the drain?

Connections to a public sewer are called direct connections. If you want to connect to a private drain, you will also need to obtain permission from the drainage owner. Connections to a private drain are called indirect connections. Moving a public manhole is called manhole relocation.

Can I have a sink in my garage?

Yes, it's as simple and necessary as that! Without existing plumbing in your garage, installing a utility sink will require expert planning, retrofitting, and likely reconstruction.

Can I put a drain in my driveway?

Channel drain immensely reduces the amount of excess water on your driveway and is the most commonly installed system for most driveway's drainage. Domestic drainage channels are the most commonly used for driveways, however B125 drainage channels are also common due to the fact it can hold a weight up to 12.5 tonnes.

Are garage floor drains legal?

There's nothing in your 2018 IRC code that prohibits garage floor drains, but check your local bylaws because many states have additional regulations in place to protect drinking water supplies.

Where does my garage drain go?

In some cases, a garage floor drain is connected to the sewer. In other situations, the drain leads to the curb where water flows into the storm drain system. If a garage floor drain is blocked, a plumbers snake can be used to open the blockage, just as it is used for clearing any other drain in the home.

Why do I have a drain in my garage?

Your garage floor drain is meant to make it easier for you to clean your garage floor quickly, and to reduce water damage in the event of a flood or storm.

Can I put plumbing in my garage?

Water lines can be run through the walls, but drain lines have to be taken through the floor. That involves cutting the garage floor to allow for the pipes if the work is being done on an existing foundation. For a new build, these plumbing considerations are part of the initial planning.

Can I put a toilet and shower in my garage?

Technically it is possible to add a bathroom to a garage- it just all comes down to the time, work and budget available. In many cases you might be limited due to the plumbing location for water and waste services.

What is the cheapest way to convert a garage to a living space?

Typically, the cheapest type of garage conversion will just involve blocking up the garage doors and finishing out the walls, floors, and ceiling with insulation, drywall, carpet, or other flooring material.

Can you legally do your own plumbing?

The state of California requires that you must be a licensed contractor to perform plumbing on projects valuing more than $500 in labor and materials.

Can I run a duct to my garage?

Is this allowed by the building codes? Sadly, the answer is yes. The building codes say you can put your HVAC system and ductwork in a garage as long as you meet certain requirements.

Can you run plumbing through concrete slab?

Plumbing can be run under concrete slabs of all kinds, including slab foundations. Plumbing is hidden by walls, floors, and roofs, but it also can run under concrete sidewalks, stoops, patios, and foundations.

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