Do you have an extra room you’re thinking about turning into a bedroom or guest space?

It’s a great way to get more out of your home, whether you need space for family, guests, or a growing household. But before you start, there are a few important rules to follow if you want the room to be considered a legal bedroom.

Building codes are in place to protect safety, especially during emergencies. Here are seven key things to know before you move forward.

1. Proper Natural Lighting Is Required

Bedrooms must have at least one window, and it needs to meet specific size requirements.

The general rule is:

• Window glass must equal at least 8% of the floor area

• Openable area must be at least 4% of the floor area

You can use multiple windows to meet this requirement if needed.

2. Ventilation Must Be Included

Windows must be able to open to allow fresh air into the room. This helps maintain air quality and reduces moisture buildup.

If your window meets the opening requirement, you are typically covered here as well.

3. Minimum Room Size Matters

If you’ve seen Harry Potter, you probably remember the cupboard under the stairs. That setup might work in a movie, but it would not qualify as a legal bedroom.

Basic requirements include:

At least 70 square feet of floor space

At least 7 feet in one direction

Ceiling height of at least 7 feet

These standards ensure the room is safe and comfortable to live in.

4. The Room Must Have Proper Access

A bedroom must have direct access to a hallway or common area. If you have to walk through another bedroom to get there, it likely will not meet code.

This is important for both safety and everyday use.

5. Two Forms of Egress Are Required

Every bedroom must have two ways to exit:

• A door

• A window or other approved exit

This ensures there is a safe escape route in case of fire or emergency.

6. Smoke and Carbon Monoxide Detectors Are Required

Working smoke and carbon monoxide detectors must be installed near sleeping areas.

It’s a simple requirement, but one that plays a major role in protecting your home and your family.

7. Basement Bedrooms Require an Egress Window

If you are converting a basement into a bedroom, this is where things get more specific.

Standard basement windows are not enough. You need a properly installed egress window that meets code requirements and allows safe exit to the outside.

Typical requirements include:

• Minimum opening width of 20 inches

• Minimum opening height of 24 inches

• Minimum opening area of 5.0 to 5.7 square feet

• Maximum sill height of 44 inches from the floor

For homeowners in Muskego and surrounding areas, installing an egress window is the key step in making a basement bedroom safe and code-compliant.

Make Sure It’s Done Right

At Baynick’s, we specialize in egress window installation across Muskego and Southeastern Wisconsin. We make sure your project meets code and adds real value to your home.

If you’re planning to convert a room into a bedroom, we can help you choose the right egress window system or a custom solution.

Call (414) 380-5656 or click here to reach out.through our contact form to get started.