How Much Does A Mudroom Addition Cost?

Typical Range:

$8,000 - $16,000

Find out how much your project will cost.

Cost data is based on research by HomeAdvisor.

Updated June 9, 2022

Written by HomeAdvisor.

Mudroom Addition Cost

Most homeowners pay between $8,000 and $16,000 for the cost of a mudroom addition, with an average project cost of $12,000. Expect to pay from $90 to $200 per square foot, meaning you could pay as little as $4,500 for a 50-square foot mudroom, while larger rooms or bump-out additions could run upwards of $30,000.

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Cost to Add a Mudroom

Average Cost$12,000
High Cost$30,000
Low Cost$4,500

*For a 50-square foot mudroom.

Mudroom Cost per Square Foot

Costs vary, but most mudroom additions cost between $90 and $200 per square foot. The cost to build a house addition ranges from $80 to $500 per square foot, but higher prices are usually for more intense projects, such as building a second story addition.

Mudroom Square FootageAverage Price Range
50 square feet$4,500 – $10,000
80 square feet$7,200 – $16,000
100 square feet$9,000 – $20,000
120 square feet$10,800 – $24,000
150 square feet$13,500 – $30,000

Cost Per Square Foot to Add Small Mudroom

Adding a small mudroom (less than 40 square feet) typically costs between $90 and $200 per square foot. Your costs will vary depending on whether you’re converting an existing space or building an entirely new addition. Contact a home building contractor near you for an estimate when planning your new addition.

100-Square Foot Mudroom Addition Cost

A 100-square foot mudroom averages between $10,000 and $12,000 for basic additions, such as flooring and walls.

Depending on the project you have in mind, you might want to consider these additional services:

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Cost of Mudroom Addition by Location

While most mudrooms average $12,000, the cost depends on the location of the mudroom addition in your home.

Cost of Adding a Mudroom in the Garage

Adding a mudroom inside the garage will still likely run from $8,000 to $16,000, but costs can vary. Expect a lower project price if you’re adding very basic changes (such as shelves) and higher costs if you’re adding walls. The cost to install a new wall is $1,800 on average.

Cost to Enclose a Porch to Make a Mudroom

Enclosing a 200-square foot porch to create a mudroom will likely cost at least $2,500, including enclosing with mesh like a screened-in porch. Adding actual walls costs several thousand dollars. Find a general contractor who can provide a quote and design ideas.

Average Cost to Convert a Closet Into a Mudroom

You’ll have to talk to a contractor for an estimate on turning a closet into a mudroom, but you’ll likely pay about $4,500.

One of the advantages of converting a closet into a mudroom is that it takes much less time and materials, and you might not even need to replace or install new flooring. A drawback is that you have much less space. You might only be able to fit a bench, some bins and coat hooks, and it likely won’t contain the mess from muddy or snow-covered boots like a traditional mudroom.

Cost of Bump-Out Mudroom

A bump-out mudroom can range from $17,000 to $30,000, but costs vary based on size and project complexity. Prices are higher for this type of room because it requires a new foundation instead of converting an existing room.

Cost of Basement Mudroom

If you have a walk-out basement, you can convert a portion of it into a mudroom for $7,000 to $25,000. The cost includes waterproofing and finishing the pace and rerouting any exposed utilities like plumbing pipes or electrical wires.  

Additional Costs to Building a Mudroom

The national average to build a mudroom is $12,000 for a fairly basic design. Certain add-ons will impact the price but create a more functional space.

Mudroom Add-OnsAverage Price Range
Bench$250 – $2,000+
Cabinets$500 – $1,200 per linear foot
Lockers$1,000 – $2,000
Faucet and Sink$350 – $1,000
Shower$3,125 – $10,000
Dog Wash Area$1,000 – $3,500
Flooring$1.50 – $30 per square foot
Wall Features$2 – $50 per square foot

Mudroom Benches

A custom-built mudroom bench may cost anywhere from $250 to $2,000 or more. Hiring a carpenter costs between $35 and $100 per hour, though some carpenters might charge by the project. A built-in bench or seating with storage options will run on the higher end of prices.

Mudroom Cabinets

The cost to install custom cabinets in your mudroom runs from $500 to $1,200 per linear foot for wood. Steel cabinet costs span from $1,000 to $1,500 per linear foot. For a 6-foot wall, you could pay between $3,000 and $9,000.

Mudroom Lockers

Mudroom lockers typically span from $1,000 to $2,000, depending on the style. Open lockers or cubbies cost less whereas closed lockers cost $2,000 or more.

Mudroom Faucet and Sink

The cost to install a new sink is between $200 and $600,while a new faucet installation costs between $150 and $400. To add a faucet and sink to your mudroom, expect to pay $350 to $1,000. This type of mudroom set-up is usually a utility sink used for washing tools, watering plants, or cleaning, but it could also be a small hand-washing sink. 

Mudroom Shower

If your mudroom has the space, you could add a shower for $3,125 to $10,000. The cost to install a shower depends on the size, whether it is custom or prefabricated, and how much plumbing work is involved. Showers in a mudroom tend to be small stall showers for cleaning off after gardening or swimming. 

Mudroom Dog Wash Area 

The price to install a dog wash area runs between $1,000 and $3,500, though custom tubs or showers will cost more. If you’re looking for a simpler alternative, a utility sink is a great option—as long as your pet can fit in it. 

Mudroom Flooring

Flooring in your mudroom will cost from $1.50 to $30 per square foot to install, depending on the type of material. Be sure to choose a water-resistant and durable material like vinyl, which ranges from $1.50 to $20 per square foot, or tile, which ranges from $3 to $30 per square foot.

Mudroom Wall Features

To make a statement in your mudroom, consider adding a wall feature for $2 to $50 per square foot. For a less expensive option, paint an accent wall for $2 to $30 per square foot. If you are looking for something more impactful, consider board and batten, wall panels, or shiplap features, ranging from $10 to $50 per square foot.

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DIY Mudroom Addition Cost vs. Hire a Professional

Some mudrooms, such as a closet conversion, are doable as DIY projects, though you might need a carpenter for benches and lockers.

However, if you’re building a new addition or converting a larger space, you should hire a professional to tackle the project. Taking on structural engineering without proper experience is a safety hazard.

Plus, adding a mudroom is a great opportunity to add value to your home, and a poorly-built addition will lower your home’s value. Hire a contractor to build an addition for the best results.


How do you add a mudroom to your house?

You can add a mudroom to your house by either converting an existing space or building a home addition. If you’re converting a space, a professional might replace flooring and add walls and plumbing to create a new room. A contractor will build a new room attached to your house for home additions.

How much are prefab mudroom lockers?

Prefab mudroom lockers can cost anywhere from $310 to $2,750 or more. High-quality materials increase the price, as does the overall size and design.

How much would it cost to remodel a mudroom?

The cost to remodel a mudroom runs from $10 to $60 per square foot on average. Since mudrooms are smaller than typical rooms, you might pay higher costs per square foot. Check with a home remodeling contractor near you for a price estimate.

How much is it to add a doorway to a mudroom?

The cost to install a door for your mudroom averages around $1,000. Adding walls or a small hallway will likely cost at least $3,600, and this price doesn’t include any additional design. If you want to convert a doorway into a mudroom, you’ll likely spend between $10 to $60 per square foot for renovation.

How much are mudroom walls?

A single mudroom wall costs $1,800 on average to install. Depending on the design, you might need more than one wall. Expect to pay $3,600 and up for two or more walls.

How much does it cost to paint a mudroom?

It will cost between $80 and $240 to hire a professional interior painter to paint a mudroom with 40 square feet of wall space. This task will cost less if you have cabinets or a window that takes up some wall space.

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