Cost To Build A Detached Garage With Apartment

If you’re looking to add some extra living space to your home, building a detached garage with apartment is a great option. It’s easy to do, and it can be done at a reasonable cost. This project can be accomplished by people who have never built anything before, and once it’s finished, you’ll have a great new area for entertaining guests or just relaxing after work.

The first step is to decide what type of garage you want to build. There are many different types available, including an attached garage that has an apartment above it. This type of structure would be ideal for anyone who wants to live in their own space but doesn’t want the hassle of renting out their home every time they go away for vacation or business trip. It also allows them to keep their vehicles safe from theft while still having access whenever needed.

How Much Does It Cost to Build a Detached Garage?

A detached garage is a structure that is separate from the main body of your house. It is still near your house, but it is a standalone structure. In contrast, an attached garage is one that is built right next to your house, most often even sharing a wall. Read more about an attached vs detached garage here.

A detached garage is a bit more expensive to construct than an attached garage. The price of a detached garage will be about 10 to 15% more than an attached garage.
No matter what style of garage you choose, the way to estimate the price is to measure the space. Generally, the cost to build a detached garage will come to $40 to 70 feet.

One reason why a detached garage is a little more expensive than an attached garage is the face that a detached garage might need more extra materials and fixtures. For example, if you want a detached garage to have electric fixtures, you are going to need to install power lines that can connect your detached garage to the grid. An attached garage, on the other hand, can be connected to your home making it more cost-effective and less labor-intensive.

Detached Garage Cost by Size

Most detached garages are between 500 square feet up to 3,000 square feet. That’s a pretty wide range of space that could require a lot of materials and even more labor to build. The cost of building a detached garage with an apartment depends on several factors, including the size of your lot, what type of roofing material you want for your garage and whether or not you have an existing foundation on-site.

The average cost per square foot for detached garages is between $52-$78 per square foot in 2019 depending on location, according to Home Advisor data gathered from across the country; however, this can fluctuate greatly depending on variables such as location within their city or county and what type of construction methods are used during construction processes like concrete slab (concrete but no wood framing) vs wood frame construction technique where lumber costs would be higher due its’ use as framing material).

Detached Garage Cost per Square Foot

In the end, it is a good idea to compare the costs per square foot of different options to find the best value. The cost per square foot depends on many factors, including the size of your detached garage and what materials you use. For example, if you choose an insulated steel garage with wood sills and a composite roof, then your total cost might be $53,200 or even less if you opt for some upgrades like extra insulation or additional ventilation fans. On top of that base price tag comes another $13,500 for four windows and two overhead doors for each unit in which there’s an apartment; this brings us up to around $66k total for everything.

When comparing prices from different companies offering similar products (for instance: one with metal framing vs another using wood framing), consider whether one option offers better insulation than another—metal framing typically has better insulation because it creates smaller spaces between its pieces; this increases how well heat-repelling properties work since heat does not rise through small gaps between panels as easily as through larger ones. When comparing metal vs wood sills (which are part of foundations), remember that more expensive versions may last longer based on their composition/quality but don’t necessarily mean they’ll last forever.

Detached Garage Roofing Cost by Roofing Material

  • Asphalt Shingles. The cost of asphalt shingles ranges from $3.50 to $8 per square foot installed.
  • Metal Roofing. Metal roofing costs between $4 and $10 per square foot installed, depending on the type of metal you choose and whether you need it insulated or coated with something else, like paint or an underlayment material.[1]
  • Tile Roofing Cost by Type of Tile Used:

o Clay Tile: $7-$12 per square foot

o Concrete Tile: $9-$16 per square foot installed (depending on size)

Detached Garage Foundation

You will also need to decide what type of foundation you want for your detached garage. There are many different options, including concrete, steel and cinder block. Each type of foundation has its own advantages and disadvantages. For example, a concrete foundation will last longer than a steel or cinder block one but will be more expensive as well.

Once you’ve decided on the materials for your foundation, it’s time to begin construction work on this piece of the project. In most cases, the site preparation phase will require excavating soil around the footprint of your new building so that you can place foundations in their proper locations within this excavation area.

Detached Garage Siding

  • Siding material: A variety of options exist for garage siding, including aluminum and vinyl. If you’re looking for a longer-lasting material that will require less maintenance over time, aluminum is the way to go. Vinyl tends to be more affordable upfront but requires touchups every few years.
  • Siding style: Garage siding comes in several styles, from horizontal panels (popular in coastal regions) and vertical panels (commonly used in Midwest states). The style you choose should blend with the overall look of your home as well as take into account local weather patterns and building codes.
  • Siding color: There are many colors available for garage siding materials—decide what type of hue will complement your brick exterior at home best before making a final selection.

Labor Cost to Build a Detached Garage

If you’re building a detached garage to rent out, the labor costs will be higher than if you were just building it for yourself. This is because there are more people involved and each of them has their own hourly rate. As such, it’s difficult to estimate the exact amount that can vary depending on several factors including:

  • The size of the garage
  • The complexity of its design

The best way to know how much labor costs will be is by estimating how many hours it would take for two professionals with experience in this type of project to complete it based on their hourly rate.

Detached Garage Insulation

The insulation for your detached garage should be tailored to fit the space. Depending on the size and shape of your building, there are a few options for insulating between the walls, ceiling, and floor:

  • Wall insulation can go from floor to ceiling. This is not only going to help keep heat inside but also provide soundproofing between apartments.
  • Ceiling insulation can be installed in between floors or even suspended above them. This would be ideal if you plan on installing an upstairs apartment later on (or if you live in an area where winters get cold).
  • Floor insulation may also be added beneath each apartment unit as well, especially if you plan on having multiple tenants renting out suites within one building structure.

Floors and Walls

Floors and walls are usually the same price. Floors are cheaper than walls because they can be made of concrete, while walls are usually brick or wood. Floors can be covered with carpet or other flooring, but you may want to consider a different material for your walls.

Walls might be more expensive than floors if you choose to have a brick exterior on them. The cost will also vary depending on what type of material you choose for your interior wall—brick is more expensive than drywall and plywood sheets, which in turn are more expensive than particle board or insulation foam boards (also known as “I-beams”).

One-Car Garage With Apartment

  • 1-car garage apartment, measuring approximately 320 square feet.
  • Large living space with separate kitchen and bathroom.
  • $30,000-$40,000 budget for construction materials and labor costs for a standard one-car garage apartment (i.e., without an elevator or other special features).

Two-car Garage With Apartment

The two-car garage with apartment is a common design for a detached garage. The extra space in the second floor can be an office, bedroom or playroom for kids. You’ll also find many designs that add a breezeway between the garage and home—a covered walkway connecting the two structures with additional storage space underneath.

You’ll want to consider these factors when planning your project:

  • Detached garages are typically built on concrete foundations instead of wood piers like attached garages. This makes them more costly because they require additional labor to pour footings and foundation walls before construction can begin on your new garage or breezeway.
  • Costs vary depending on whether you plan to grade level your lot prior to building (which will also require drainage structures), but this step will reduce future maintenance needs by keeping water away from areas where it could harm foundations or internal components within your existing home or attached structure like staircases leading up into each.)

Three-Car Garage With Apartment

The cost of building a three-car garage with apartment will vary depending on the size of your garage and apartment. However, we have estimated that it will cost at least $120,000 to build a three-car garage with an 800-square-foot apartment above it.

The size of the lot where you plan to build your detached garage will also affect how much it costs to build a three-car garage with an apartment because the larger lots are more expensive than smaller ones. Therefore, if you have a large enough lot for two cars and want room for an additional two cars in addition to your personal vehicle(s), then building this type of structure could be affordable.

However, if you don’t have enough space on your property or want more privacy from neighbors then consider putting up fencing around some sides so they cannot see inside while still providing access via driveways – this can save money too.

Detached Garage with Living Space

A detached garage with living space is a great way to add value to your home. It is also a fantastic way of adding an extra bedroom or guest room, as well as a home office or playroom. When you are considering the cost of building this type of project, it’s important that you take into account the overall size and scope of the job.

Cost Per Square Foot

The average cost per square foot for a detached garage with an apartment is around $1,000 to $2,000. However, this is just an average and can vary depending on factors like the size of the garage or other details.

Detached garages are usually between $10,000 and $40,000 while attached garages (which don’t have an apartment) tend to cost less because they only need labor costs instead of having higher utility and labor costs like detached ones do.

Benefits of a Detached Garage

  • Convenience: A detached garage provides you with the convenience of having your car and tools close to your home. It also gives you more space for storage.
  • Security: A detached garage is a great way to keep valuables safe from the weather, especially if it has a roof over it. This makes it easy to store items that are not used on a regular basis, such as skis or snowboards during winter months or lawn mowers when it’s too hot outside for them to be used safely.
  • Independence: If you’re building your own home from scratch, consider putting in an attached garage that can be easily converted into living space in the future if necessary (for example, if children come along).

Detached Garage Designs

Garage designs, plans and styles are available for all budgets. The garage doors can be customized to match your specific needs. Garage door costs include the following:

  • Materials
  • Labor
  • Installation

Detached Garage Electrical Wiring

  • Wiring for garage door opener
  • Wiring for electricity and lights
  • Wiring for security system
  • Wiring for smoke detectors
  • Wiring for fire alarm
  • Wiring for video surveillance system

Detached Garage Lighting

Lighting is an important aspect of any garage. It can be used for safety, security, efficiency and aesthetics.


Lighting can help you see properly when working around your vehicle. This will reduce the risk of injury as well as improve accuracy during repairs or maintenance work on your vehicle.


Lighting in your garage will make it easier for you to spot intruders in order to protect yourself and your belongings from theft or vandalism. Lighting can also help deter burglars by making them feel uncomfortable while they are attempting to commit a crime in the area (source).


Lighting inside the garage will make it easier for you to find tools and equipment when working on projects that require certain parts or supplies (source). In addition, well-placed lights throughout the space can increase productivity by reducing eye fatigue caused by long periods spent working under dim conditions (source).

Detached Garage with Breezeway

If you want to add a breezeway to your detached garage, it’s also possible. The breezeway is the covered walkway between the house and garage that gives occupants access to both. It can be used as an additional entrance to the home’s main entrance or as a way for occupants in the home to easily access their cars in bad weather.

If you want a breezeway with your detached garage, expect it will cost about $3-$4 per square foot of space added onto your house. This means that if you want a 10 x 15-foot breezeway connecting two buildings together, then it will cost around $5-$6k total ($5/sq ft).

Additional Costs To Consider When Building A Detached Garage With Apartment Above

Building a detached garage with apartment above can be an expensive endeavor. Aside from the cost of materials and labor, you’ll also need to consider other expenses that come with building a second story on your home.

If you want to add a bathroom, kitchen, bedroom or living room to your detached garage with apartment above it, we recommend using these additional costs as a guide:

Bathroom: If you’re looking for some inspiration on how much it will cost to build one of these rooms in the space above your detached garage with apartment in mind, check out this article on estimating construction costs. Keep in mind that most bathrooms are built around $8-10 per square foot installed but will vary depending on whether or not they’re custom made for each project site.


If you’re considering building a detached garage with an apartment above, we hope this guide has helped you decide. There are many benefits to building your own detached garage, but it is important to consider the costs associated with it and whether or not this is right for your family. If you have any additional questions about how much it will cost to build a detached garage with an apartment above it, please contact us today.

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