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, 2021

Written by HomeAdvisor.

Mudroom Addition Cost

Most homeowners pay between $8,000 and $16,000 for a 50-square foot mudroom addition, with an average project cost of $12,000. You could pay as little as $4,500 for a space of equal size, but larger rooms or bump-out additions could run upwards of $30,000.

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).

Cost Per Square Foot to Add Small Mudroom

Adding a small mudroom (less than 40 square feet) might cost between $90 and $200 per square foot. Your costs will vary drastically depending on if 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 just the basics, such as flooring and walls.

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

Compare Mudroom Addition Estimates From Top Pros
Compare Costs

Cost of Mudroom Addition by Type

While most mudrooms average $12,000, costs depend on the type of addition.

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 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 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, and that’s 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.

Cost of Built-In Mudroom

A built-in mudroom typically averages between $8,000 and $16,000. Your project costs depend on where you’re adding this type of room, as well as the size and what features you want to include.

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 no more than $4,500.

One of the advantages to converting a closet is that it takes much less time and materials (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 probably won’t contain the mess from muddy or snow-covered boots like a traditional mudroom.

Compare Quotes For Your Mudroom Project
Get Local Estimates

Cost to Build 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 comprehensive space.

Mudroom Add-OnsAverage Price Range
Bench$250 - $2,000+
Cabinets$500 - $1,200 per linear foot
Lockers$1,000 - $2,000
Dog wash area$1,000 - $3,500

Cost to Build a Mudroom Bench

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.

Cost of 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 Locker Cost

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.

Cost of Dog Mudroom Wash Area

The price to install a dog mudroom 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). This type of sink installation costs between $40 and $200.

DIY Mudroom Addition Cost vs. Hire a Professional

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

However, in the event of building a new addition or converting a larger space, you should absolutely hire a professional. Taking on structural engineering without proper experience is a safety hazard.

Not to mention, adding a mudroom is a great opportunity to add value to your home (when worked on by a contractor, architect and/or engineer). 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 converting a space, a professional might replace flooring and add walls and/or plumbing to create a new room. For home additions, a contractor will build a new room attached to your house.

How much are prefab mudroom lockers?

Prefab mudroom lockers can cost anywhere from $310 to $2,750 or more. Higher quality materials raise 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. Because mudrooms are smaller than typical rooms, there’s a chance you might pay higher costs per square foot. Check with a home remodeling contractor near you for a price idea.

How much is it to add a doorway with mudroom?

The cost to install a door for your mudroom averages around $980. Adding walls or a small hallway will likely cost at least $3,600, and this price doesn’t include any design. If you just 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?

Painting a mudroom with 40 square feet of wall space ranges from $80 to $240 when hiring a professional. This will cost less if you have cabinets or a window taking up some of the wall space.

Hire a Local Contractor To Build Your Mudroom
Find Pros