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Can I do an addition over my garage? Yes. Here’s how.

If you’re like most homeowners, the last two years have shown you that there just isn’t enough room in your home. As the COVID-19 pandemic continues to change the way we use our homes, many people seeking a private, secluded area of their home have found themselves wondering, “Can I do an addition over my garage?”

At Lamont Bros., we have guided hundreds of homeowners through the process of adding space to their homes. From our experience, we can confidently tell you that, yes, you can indeed put an addition over your garage. In fact, we’ve been seeing it grow in popularity in the last few years. 

In this article, we’ll discuss several different factors you should consider before adding on above your garage. Once you understand the important elements of a project like this, you can decide if an over-garage addition is right for you. 

Why should you build above your garage?

Homeowners have many reasons for choosing to add a second story above their garage. As home offices become more popular, people find themselves needing a quiet place to work. 

Adding a dedicated office

One of the most common reasons people choose to build on top of their garage is to increase their square footage. With families spending more and more time in the home since the start of the pandemic, many have found that they want more space.

Specifically, they want a home office. We’ve seen more requests for home office additions in the last year than ever before. It makes sense – now that we know how convenient it can be to work from home, we’re doing it more. 

Problem is, people don’t want their bedroom doubling as an office space. In fact, working from your bedroom isn’t great for your mental health. So, for those who need a dedicated home office space in their home, sometimes the first step is to add more space. 

Nowhere to go but up

Due to zoning laws, sometimes the only option for an addition is to add a second story. Setback codes (the building codes that decide how close a house can be to a sidewalk, road, property line, etc) can severely limit how much space can be added to the first story.

So, when you can’t expand outwards, the solution is to build a second story. Many homeowners have chosen to go this route if they have small yards or live in a neighborhood where the houses are built close together. 

Soundproofed space

If you’re like most homeowners, your garage is likely the quietest place in your house. In fact, ¼ of homeowners use their garage for storage rather than parking space

One of the benefits of adding an addition to your garage is noise reduction. For home offices, this is an especially valuable benefit. Any activity going on elsewhere in the house won’t disturb the space above the garage.  Most household noises won’t carry through the garage and into the room above, and the garage itself is usually quiet. 

In the same way that over-garage additions can keep noise out, they can also keep noise in. That’s why these areas are excellent candidates for game rooms, music studios, or home gyms, too. 

How does your current home design affect your options?

The layout and design of your home will greatly affect the construction of an addition to your garage. The first thing you’ll need to consider is whether or not your garage is attached to your home.

Attached vs. Detached Garage

If you have a detached garage separate from the main structure, the design will be less challenging, but construction may be complicated. A detached garage is easier in the sense that you won’t have to tie the roof line and structure to the rest of the house.

However, if you want to have power and water in your new addition, that could be a problem.  You may need to run new lines to the garage if it doesn’t already have them, which takes time and increases cost.

With an attached garage, the visual design is more of a challenge. You’ll want the design of the addition to match the design of the home. The most challenging part of this process is matching the roof. You can read more about this in our article “How to design an addition to match your house.”

Existing second level

Adding on to an attached garage also means you’ll need to consider the current number of floors in your home. 

Oftentimes, the upstairs of a two-level home does not extend over the garage. If this is the case for you and you’re looking to add to the top of your garage, the good news is that you should just be able to access it via the existing second story.

However, for homes that only have one level, you’ll need to design a way to access the space above your garage. This usually involves installing a staircase from your existing home up to the addition. 

To install a staircase, you should expect to lose anywhere from 50-80 square feet of living space. For visual reference, this can be between the size of a closet up to a quarter of a bedroom. Planning the location of your access stairs is crucial to making sure your remodel is functional and uses the space efficiently.

Project costs

Adding square footage to a house is one of the best ways to add value to the home. However, the process of designing and adding a second story to a home takes plenty of planning and expertise. 

As a result, it should be no surprise that these types of projects tend to be high-cost. A basic 2nd story addition between 300-400 square feet costs between $275k-$350k

Watch the video below to learn all about budgeting for an addition project

What potential challenges come with adding above the garage?

Second-story additions are complicated remodel projects. It should come as no surprise that adding a room above a garage comes with its own set of unique challenges. 

Structural reinforcements on the first floor

As previously mentioned, second-story additions usually require some form of reinforcement on the first floor. Since the bottom level wasn’t originally designed to support a second floor above it, the structure needs to be redesigned.

This can sometimes be as simple as adding a few additional shear panels to the corners of the wall. Other times, your build team may need to tear open almost every wall on the bottom floor to add isolated columns and footings and tear off all the siding on the home to add shear panels.

Working around previous remodels

Homes that have been previously remodeled often have mismatched structural components inside the walls. In order to support the weight of a second story above, these elements must be inspected and often re-designed.

We recently did a second-story addition above a living room and kitchen. The kitchen had been previously remodeled, and the walls hadn’t been properly attached to the frame of the house. Ultimately, we had to tear out the entire ceiling and re-engineer the structure. 

Heating and insulation

One element of an over-garage addition is figuring out how to properly heat and insulate the space. Garages are not typically heated like the rest of the house, so they get cold in the winter and warm in the summer.

As you could probably guess, the temperature of the garage will affect the room above it. If not properly insulated, the room will fluctuate in temperature along with the garage below. At night, the floors will be notably cold, especially if they’re hardwood or tile.

The best way to solve this issue is to pay close attention to the insulation in the floor. Heated floors can help in the winter, too. 

Thinking about an addition over your garage? 

If you plan well and plan to spend a moderate amount of money on the project, building an addition above your garage is a great way to add usable space to your home. To learn more about second-story additions, read this article, which discusses the different options for adding a level to your home.

Due to its technical complexity, we recommend you consult with a designer or architect to guide you through the process of adding on above your garage. When you’re ready to discuss your upcoming addition project, click the button below to schedule a video call with one of our design consultants.