How Much Does it Cost to Build a 30x40 Garage? (Steel, Wood, Prefab) - Epic Home Ideas (2022)

Written By Glenn Prescot

In this article we will go over the cost of building a 30×40 garage (steel, wood, prefab kit etc) along with several other related details like types of 30×40 garages, attached vs detached options etc.

How Much Does it Cost to Build a 30x40 Garage? (Steel, Wood, Prefab) - Epic Home Ideas (1)

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According to construction experts and real estate professionals, there are at least 8 reasons to build anew or replace an existing garage. If you’re launching this project, you probably have more reasons to add to this list:

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  1. Your current garage may be unsafe, thus a replacement lowers chances of injuries and accidents.
  1. The garage isn’t expansive enough to meet your needs, especially when the size of a family grows.
  1. A good garage increases the value of any home, no matter which material option you choose.
  1. You can add storage, a workout space or make other practical use of all or part of the space not being used for cars.
  1. Garages protect cars when downpours, hail and snow fall and can serve as second entertainment venues when extreme weather arrives.
  1. Attached garages can help insulate your home due to the structure’s proximity.
  1. A garage can add curb appeal to a home in addition to being a practical addition.
  1. You can build/design to your own specifications by choosing from many options: DIY kits, software design apps or by contracting with a builder to do the job.

Table of Contents

  • Types of 30×40 Garage
    • Traditional type with straight walls.
    • Quonset type garage
    • Steel garages
    • Wooden garages
  • Attached vs detached? That is the question
    • Attached garages
    • Detached garages
  • How Much Does it Cost to Build a 30-x-40 Foot Garage?
    • Pricing for DIY metal garage kits?
    • What does it cost to build a wooden garage?
    • Other price considerations
  • How many cars can fit in 30×40 garage?
  • Mistakes homeowners make when adding or replacing existing garages

Types of 30×40 Garage

Because all construction projects these days give builders multiple options, you should not be surprised to discover that the best way to begin your project is to identify the type of structure that best suits your budget, home’s design and needs. Here are the 4 most common 30 x 40 foot garage options:

Traditional type with straight walls.

Also called a “standard” garage, traditional garages are easy to identify because they serve no purpose other than to house one or more automobiles.

How Much Does it Cost to Build a 30x40 Garage? (Steel, Wood, Prefab) - Epic Home Ideas (2)

These structures have no additional features thus they are bare bones – and they’re the simplest to construct, no matter how many cars you have.

Further, if your vehicles are SUVs, look for plans or kits that expand on the garages height and width.

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Quonset type garage

These are the easiest to identify due to their unique shapes and histories based on Quonset huts used to house GIs, operations and storage facilities on military installations.

Because they are fabricated of steel, these structures are easy to customize and can be custom-built to include features like vents and skylights.

Durable, affordable and highly protective, you don’t have to sacrifice style. Since steel is available in myriad colors these days, you don’t have to settle for the standard grey for which military huts are known.

Steel garages

How Much Does it Cost to Build a 30x40 Garage? (Steel, Wood, Prefab) - Epic Home Ideas (3)

These are most likely to be “straight wall” buildings offering maximum interior space and offering multiple exterior design and color options.

Like Quonset huts these straight wall garages are super strong and durable, won’t harbor termites, they’re fire resistant, easy to maintain and if you opt for recycled steel, your finished garage will be a model of earth friendliness, too.

The number of steel prefab kits on today’s market offer you a vast number of options.


Wooden garages

Wood is most often chosen for aesthetic reasons and if you’re a trend watcher, you probably know that timber garages are back in style, reflecting the past when all garages were built only of wood.

In addition to being a sturdy, durable material wood can insulate an enclosure and many prefabs, built-from-scratch and kits are considered environmentally friendly because wood is a sustainable resource.

Downsides associated with this type of garage are the potential for termites, mold, mildew and even treated lumber can be flammable so you could wind up paying more for homeowner’s insurance if you choose this style when you build.

Attached vs detached? That is the question

While there are kits available for 30- x 40-square foot detached and attached garages, your home’s layout, property limits and zoning restrictions could force you to choose only one configuration, so it’s good to know the pros and cons of both types of garages in the event you are given a choice.

Attached garages

  • -Become a part of the residence due to shared wall(s)
  • -Could increase your tax bill as a result
  • -Are especially convenient in regions prone to bad weather
  • -Usually cost less to build
  • -Can take advantage of existing electrical systems
  • -Usually meet homeowner’s association standards
  • -Can positively impact home appreciation
  • -May not be practical if the lot is narrow
  • -Could be a security risk as a point of entry
  • -If fire breaks out, the home is more vulnerable
  • -You can’t expand attached garages
  • -The wrong style could ruin your home’s curb appeal
  • -Could be required to meet complex building permit standards.

Detached garages

  • -Give you location latitude to position it anywhere on the lot
  • -Won’t require you to meet the same design standards as attached garages
  • -You can expand the garage size down the road
  • -These garages are more secure because they’re not attached
  • -Usually give homeowners more interior space than do attached garages
  • -Can more easily double as workshops for mechanical projects
  • -Access isn’t as easy in bad weather
  • -You may have to run new utilities to the structure
  • -Yard space is lost, though that leaves less grass to mow!
  • -Homeowners associations often prohibit these structures.

How Much Does it Cost to Build a 30-x-40 Foot Garage?

Pricing for DIY metal garage kits?

There is no easy answer to this question because 30 x 40-foot metal garages can vary depending upon whether you want a vertical or horizontal roof, garage doors and any number of extras that customize the finished look of the garage.

If you want a ballpark, you can expect to spend a $13,900 on the basic kit, door and shipping costs. Pre-fab kits offer myriad advantages including color choices and the inclusion of blueprints.

A garage design software tool can be handy in this situation if you are a DIY person.

(Video) How Much Does A Steel Building Cost? - 30x40 | 40x60

What does it cost to build a wooden garage?

Once again, your 30- x 40-foot garage cost is going to be impacted by your area of the country, availability of raw materials and whether or not you do the work yourself.

That stated, here are estimates you can work with to figure out the cost if you purchase a kit: You’ll spend an average of $18,600 for the kit, $1,600 for a door and $800 on shipping costs, total of $21,000.

Other price considerations

Among the factors that could contribute to the final cost of your garage are the following:

  • -Union labor tends to be more expensive which is why labor costs usually range between $4 and $8 per square foot.
  • -You may have to pour a concrete pad if none exists at between $4 and $8 per square foot.
  • -If you don’t use a kit, framing costs will run between $1 and $5 per square foot.
  • -To drywall the interior, you’ll spend between $8 and $12 per 40 x 8-foot panel.
  • -Garage window(s) can add between $100 and $1300 to the project cost.
  • -Plan to spend between .50 and $2 per square foot to insulate. The costliest insulation product on this market is currently spray foam.

How many cars can fit in 30×40 garage?

Your 1200-square foot garage has the potential to hold 3 or 4 cars, depending upon the size of the vehicles and how much of the interior is taken up by storage, but according to Pocket Sense, homeowners can expect to see an 81-percent return on investment since garages perpetually top lists of improvements most likely to increase a home’s value.

Mistakes homeowners make when adding or replacing existing garages

  1. Compromising on quality materials or labor. All costs considered, a steel garage is likely to outlast any wood structure and because even the worst steel will hold up better than some woods, you don’t want to face years of maintenance for yourself or pass the burden down to whomever buys the house when you sell.
  1. Ignoring aesthetics. In your quest to save cash by adding a 30- x 40-foot garage, it can be easy to compromise the home’s exterior look. For this reason, wood garages often have an edge because they deliver on more design options. That stated, today’s steel garages are getting more versatile and beautiful every day.
  1. Doing the job without proper skills or training. Not only do zoning laws exist in most communities but community regulations can require professional licensing by whomever does the build. Neighborhood associations are extremely picky about adding exterior features because changes can impact the value of homes on the entire block. If you live in a rural area that doesn’t require you to adhere to these types of standards, you’re in luck!


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How big is a 30x40 building? ›

A building of this size (30' x 40' = 1,200 square feet) is a good choice for a 4 car garage or 3 car garage with shop & storage space.

How much does it cost to build a detached garage in Canada? ›

In a similar way, each variation in garage type, style, material, labour, environment, and size can impact the cost. The construction of a garage in Canada can cost anywhere from $23,000-$90,000 — with higher costs for turnkey construction projects (more on that later).

How much does it cost to build a garage in Texas? ›

The average cost to build a garage is $35 to $60 per square foot. The cost to build a 1-car garage is between $7,500 to $14,200, a 2-car garage costs $19,600 and $28,200, and a 3-car garage ranges from $28,200 to $42,700. Get free estimates from garage builders near you or view our cost guide below.

How much does it cost to build a garage in Alberta? ›

The costs in Calgary Alberta to build a garage range from $21,000 to $155,000. Most people spend $22,000 to $47,000 on this project. The range of prices depends greatly on size of the garage build, the materials used and whether it's an attached or detached garage.

Is it cheaper to build a garage or buy a kit? ›

Garage kits are often less expensive than prebuilt garages. There are many options available, and it's easy to find the garage that best suits your home and budget when you go with a kit. Because you will be doing all of the labor, there is, of course, no labor fees.

Are steel homes better than wood homes? ›

Steel buildings are more durable than wood, and more resistant to water damage. Steel will not warp or expand like wood does, and it does not rot, so it will be less likely to attract fungus. Termites and other insects who eat wood will also steer clear of a steel home.

How thick does a concrete slab need to be for a garage? ›

The concrete slab should be four inches thick at least; it needs to be thicker if heavy equipment will rest on it. Building codes offer requirements for the concrete mix, which vary by region. The standards are expressed in terms of "compressive strength," which boils down to the amount of water used in the mix.

Is it cheaper to buy a metal garage or build one? ›

Metal buildings are cheaper than buildings made out of wood or other materials.

How do I estimate the cost of building a garage? ›

A very basic way to rough estimate garage building cost for your project is to simply apply a typical average per square foot construction of $30 to $40. That is for an average cost basis for having a contractor/builder build a basic one story garage for you on your property.

How much does it cost for a 20 by 20 concrete slab? ›

But how much does a 20×20 concrete slab cost? You can expect to pay between $1,600 and $3,200 for a 20×20 slab. The estimates are based on the average cost of $4 to $8 per square foot for a concrete slab.

Does a garage add value to a house? ›

Garages and parking spaces are in higher demand than ever before, so having – or adding – one attached to your property can significantly increase its value should you choose to sell. Recent research found a garage can add as much as five per cent to the price of a typical home.

Is adding a garage a good investment? ›

Recouped Value of a Garage Home Addition

According to the data provided by Remodeling magazine, building a new garage has an ROI of approximately 64.8%. This return-on-investment is one of the best you'll find when it comes to additions to your home.

How much does it cost to build a 900 sq ft house? ›

$90,000 - $180,000

How much does a 2000 square foot foundation cost? ›

An average home is about 2,000 square feet and a foundation can cost from $13,000 (including materials, labor and permitting) to more than $40,000 if it's a basement foundation. For a project on the low end, budget around $15,000 in case of cost overruns and around $45,000 for a project on the higher end.

How many square feet is a 2 car garage? ›

The average sized 2 car garage's square footage usually ranges from 400 (20×20), 576(24×24), and 720 (24×30) square feet.

What is the least expensive garage to build? ›

A single-car attached garage is the least expensive option and averages $10,500 to $27,000. This size includes approximately 240 to 384 square feet. A 2.5-car garage is a popular option that allows a small amount of work space in 520 to 744 square feet and has an average cost of $20,800 to $52,000.

How long do prefab garages last? ›

What's the life-span of a prefab garage? Concrete prefab garages generally have a life span of 50+ years, with basic annual maintenance.

Are prefab garages any good? ›

But the question is, “Are prefab garages any good?” In most situations, it is better not to waste your money on a prefab garage. The prefab or modular garage is cheap, easy & quick to install and functional. However, it is no match to a constructed garage on quality, durability and aesthetics.

What is cheaper to build with wood or steel? ›

The initial cost of steel framing is higher than that of wood framing, with some experts attributing the difference to labor costs. Many choose wood framing specifically because it can be more budget-friendly in the short-term.

What are the disadvantages of steel framing? ›

Three Problems with Steel Frame Construction
  • Fire Reduces the Strength of Steel. While steel is incombustible, its strength lessens at high temperatures, such as during a fire, making the steel frames susceptible to buckling and even collapse. ...
  • Steel is Prone to Corrosion. ...
  • Steel Framed Construction is Not Energy Efficient.
1 Aug 2019

What is the best foundation for a garage? ›

A finished concrete slab is then poured on a compacted gravel base for a smooth finish inside the garage. A concrete frost wall foundation is the best choice for challenging sites that may be far out of level.

Does a garage slab need rebar? ›

A garage slab or the garage concrete floor does not need rebars, provided it is 4” or less in thickness. Other forms of concrete reinforcement will however reduce cracks. Rebar is certainly required if the garage slab is 6” or thicker. This is the short & sweet answer.

Should you put plastic under concrete? ›

Why a Plastic Vapor Barrier Under Concrete Slab - Mondays with Mike

What is the best size garage to build? ›

The Average-Sized Garage

If your car's width is 6′ to 6.5′, adding a few feet all around will give you 20′, which is the minimum size. Opting for a 22′ or 24′ width will elevate your space a great deal.

Are prefab metal garages any good? ›

Overall, if you need something cost-effective and convenient, metal prefab garages are a good choice. The more construction you can do yourself, the more money you save as well.

What is the best material to build a garage? ›

For decades steel has been well-known for building because of its strength and durability. However, there are many reasons to choose steel as the best building material for your garage or workshop.

Do I need planning permission to build a garage? ›

Outbuildings such as sheds, garages, greenhouses and some other structures like garden rooms are also considered to fall within permitted development so will not require planning permission.

Is it cheaper to build on top of garage? ›

Save on Costs – Because you're building an above-garage addition, you won't miss out on the living space beneath. When adding beams and support posts, it doesn't impact the main part of your home, which can help you save thousands. (Keep in mind that this refers to attached garages, not detached garages.)

How do I calculate building materials for a garage? ›

Multiply the length by the width of each wall and of each side of the roof to determine the area of each. Add the totals to get the total surface area of the garage. Divide total surface area by 40 square feet (area of 5-by-8 sheathing) to determine the sheathing needed for cladding and roof decking.

Will concrete prices go down in 2022? ›

Linesight's latest Quarterly Construction Materials Costs report shows that higher prices seen in 2021 are set to continue throughout 2022.

How much does a 40x60 concrete slab cost? ›

How much does a 40×60 concrete slab cost? It would be about $8,500 to $12,000 for a 40×60 foot concrete slab, 6 inches thick. That's based on national averages of around $5 per square foot for a fully engineered, finished concrete slab, including labor and materials.

How much does a 24x30 concrete slab cost? ›

A 24×30-foot slab covers 720 square feet. With an average price of $6 per square foot, you may pay about $4,320 for a slab foundation. However, the price can range from $4 to $8 per square foot, resulting in a total cost between $2,880 and $5,760.

What home improvements do not add value? ›

14 Home Improvements That Do Not Add Value
  • Converting Your Garage. ...
  • Installing Solar Panels. ...
  • Luxury Upgrades. ...
  • Adding Onto Your Home (Overbuilding) ...
  • Renovating Your Attic or Basement. ...
  • Replacing Windows and Doors. ...
  • Personalized Landscaping. ...
  • Adding a Media Room/Home Theatre.
26 Sept 2022

What adds more value to a house a garage or extra room? ›

We've found that most people value a garage more than an additional bedroom. The need for extra storage space along with the reality that most conversions aren't done very well leaves us converting about 90% back to garages.

Is it worth it to convert a garage into living space? ›

As long as a garage conversion is done correctly, with permits and obeying building codes, it will add value to your home. The value itself depends on how seamless the conversion is and the type of room you build. Typically, you can expect to recoup about 80 percent of the project cost in home value.

What is an average size two car garage? ›

Average Two Car Garages

Typically, two car garages are 18 feet wide by 20 feet deep. This is just enough to fit two cars in your garage. There are several other common sizes including 20 x 20, 22 x 22 and 20 x 22. Some of these sizes make it far more comfortable to open the doors of your car.

Does finishing a garage add value? ›

A finished garage won't increase the value of your home's appraisal. However, it may add a “wow” effect to potential buyers and shorten the time that your house is on the market.

How much does it cost to build on top of garage? ›

The Nest reports that a building an addition typically ranges between $80 and $200 per square foot, and with Your Own Architect estimating the typical garage to include between 400 and 500 square feet of interior space, this can add up to roughly $32,000 to $100,000 (considering minimum and maximum composite values ...

Will construction costs go down in 2022? ›

Going into 2022, we expect to see more positive shifts. The cost of construction is forecasted to decrease and stabilize with continued economic growth and the relief of supply chain halts. And with building materials easier to source, we predict a boom in new home builds.

Is it cheaper to buy a house or build a house? ›

Is it cheaper to build or buy a house? As a rule of thumb, it's cheaper to buy a house than to build one. Building a new home costs $34,000 more, on average, than purchasing an existing home. The median cost of new construction was $449,000 in May 2022.

How much should I save to build a house? ›

The total cost of building a custom home can also vary quite a bit depending on the choices you make, the building materials you use, labor costs and even what region of the country you're in. Though $282,299 is the average, most homeowners spend $114,209 – $450,824 to build their homes.

How much does it cost to pour a 30x40 concrete slab? ›

How much does a 30×40 concrete slab cost? The average cost is $4 to $8 per square foot. The median price is about $6 per square foot. Based on these averages, you may pay $4,800 to $9,600 with a median estimate of $7,200.

What is the cheapest foundation for a house? ›

If you're building a home, a concrete slab makes sense because of its low cost. It's the cheapest option available, and, comparatively speaking, it's the quickest solution. The right crew can lay a concrete slab foundation in a short period of time, and the drying process doesn't take much longer.

How much does it cost to pour a 24x24 slab of concrete? ›

A typical 24x24 garage slab costs between $3,057 and $5,944 with prices ranging from $5.31 to $8.31 per square foot for a 4” reinforced slab of concrete, and $6.83 to $10.32 per square foot for a 6” slab of reinforced concrete.

What is a good size for an oversized 2 car garage? ›

In short, the minimum dimensions for a 2 car garage should be 20'x20′ and to make extra space to get in and out of the car, it is recommended to go with 24'x24′ or larger.

What size garage fits a full size truck? ›

An average car is around 14' long so the 12' x 24' may work. But, if you have a full-size pickup truck or SUV you may need the 12' x 32' garage. Each of our garage style options already include a heavy duty floor system. This has ¾” floor decking and floor joist 12” on the center.

How many sq ft is 30X40 site? ›

What are the most creative homes built in a 30*40 (1200 square feet) area?

What is 30X40 site? ›

maine. 30X40 is a design-focused, residential architecture studio founded by award-winning architect Eric W. Reinholdt. He designs simple, modern, site-specific homes inspired by Maine's rugged surroundings, humble materials, agrarian building forms, employing a modernist esthetic.

How many sq ft is 40x60? ›

A building of this size (40x60 or 2,400 sq ft) is a good choice for a large six-car garage, auto repair shop, RV garage or barn.

How many square feet is a 30x50 building? ›

Personal Uses for a 30 x 50 Metal Building

Perhaps 1,500 square feet may not sound like a lot of space— given that the median size of the 2,500 square foot or more of new homes today.

How many 30x40 sites are in one acre? ›

Considering a regular rectangular one acre site is given then you will be able to demarcate a minimum of 18 sites in 30x40 ft size.

How much would it cost to build a 30 by 40 house? ›

30x40 Construction cost in Bangalore / 30x40 House Construction cost in Bangalore Duplex/RentalNo of Floors G+1 G+2 G+3 G+4Total 30x40 Construction cost @Rs 1800 /sq ft
30x40 Rental Houses G+3 FloorsG+3 Floors RentalRs 55 Lakhs
30x40 Rental House G+4 FloorsG+4 Floors RentalRs 75 Lakhs
7 more rows
1 Feb 2018

How many bags of cement do I need for 2000 square feet? ›

For a 2000 sq ft rcc roof slab casting at 5 inch thick, generally you will need 175 bags (around 8712 kg) of cement which is approximately equal as 214 in cubic feet or in 6.05 cubic meter by using 1:2:3 (cement: sand: aggregate) mix to gain 3000 Psi compressive strength of concrete in 28 days.

Can I build or construct a spacious house on a 30 40 Site? ›

YES, You will be able to build or construct a good spacious 3BHK duplex house in Bangalore on a 30×40 site.

How much cement is required to build a house? ›

Of the total material cost, cement required is up to 16%. Around 0.4 cement bag is used per sqft of construction that makes a total of 400 cement bags of 50 kg each is consumed for 1000 sqft house.

How many bags of cement do I need for 1500 square feet? ›

So, now we know that 135 bags of cement are needed for the ground flooring of concrete for houses measuring 1500 square feet.

Which is better pole barn or metal building? ›

Higher Value

Customizable metal buildings are generally less expensive to build than a wooden pole barn, but that doesn't mean they are of lesser value. A stronger foundation, higher quality materials, and less required maintenance over the life of the metal building will save you money on all fronts.

How do you insulate a metal building? ›

As the universal way to insulate a steel building, foam or “rigid boards” are ideal for practically any type of climate. With several available performance ratings, rigid boards are an effective way to insulate a steel building as well as dampen the exterior noise.

How big is a 40x60 Barndominium? ›

Compare Prices Need Financing? A 40×60 barndominium is large enough for 4-5 bedrooms, as well as providing you ample storage for your equipment and your vehicles, with 2,400 sq ft to utilise.

Is it cheaper to build a metal building or wood? ›

The short answer is that metal buildings tend to be cheaper depending on a range of factors like the building size, building codes, loads (wind, seismic, snow, etc), design, and accessories. However, the odds of a metal building being cheaper than a wood building goes up fast the larger the building in question.

What are standard metal building sizes? ›

Steel Building Widths

Common metal building sizes are usually around 40-foot by 60-foot, depending on the application. You can even get an unobstructed clear span width of 300 feet. Modular frames that have limited interior supports can reach up to 480 feet in width.

How big is a 30x30 shop? ›

A 30×30 concrete slab is 900 square feet.


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