When searching for a bathroom addition contractor in Appleton, WI, look no further than Kelly McCarthy Builders Inc.
As an experienced and trusted local contractor, Kelly McCarthy specializes in transforming outdated or cramped bathrooms into luxurious, functional dream spaces.
Serving homeowners throughout Outagamie, Winnebago, Calumet, and surrounding counties, Kelly brings over several years of renovation expertise to every project.

How Much Does It Cost to Add a Bathroom in Appleton
One of the first questions on any homeowner’s mind when considering a bathroom addition is: how much will it cost?
While prices can vary significantly based on factors like square footage, layout changes, fixtures, and finishes selected, you can expect a full bathroom addition in the Appleton area to start around $25,000 for a basic 5×7 layout.
Larger or more luxurious bathroom additions could reach $75,000 or more.
Item | Low End | Average |
---|---|---|
Fixtures (toilet, sink, tub/shower) | $1,500 | $5,000 |
Tile, flooring, countertops | $1,000 | $3,000 |
Lighting and electrical | $500 | $1,500 |
Of course, the actual cost for your Appleton bathroom addition will depend on the specific plan you create with your contractor.
The key is establishing a realistic budget upfront and working with a professional to find smart ways to get the most value out of every dollar.
Top Waterproofing Strategies for Bathroom Additions in Appleton
With any bathroom renovation, waterproofing is critical to prevent moisture damage, mold, and other expensive issues down the road.
Appleton bathroom addition contractors are well-versed in techniques to keep your new space sealed and dry:
- Installing a waterproof membrane or vapor barrier behind tile and surrounding the shower/tub
- Carefully caulking and sealing around fixtures, flooring, and other potential water entry points
- Sloping the shower floor and using a curbless entry to prevent standing water
- Choosing mold-resistant drywall, grout, and other materials
- Ensuring proper ventilation with a high-quality exhaust fan
Your Appleton bathroom remodeling contractor will recommend proven waterproofing solutions based on your space’s unique needs.
Maximizing Limited Space for a Bathroom Addition in Appleton Homes
Many Appleton homes, especially older properties, have limited space to work with for a bathroom addition.
But a skilled design-build contractor can find creative ways to integrate a new bathroom or powder room without it feeling cramped.
Some space-saving ideas:
- Repurpose an unused closet or storage nook for a compact powder room with just a toilet and sink
- Steal space from an adjoining bedroom, hallway, or oversized laundry room
- Keep the toilet, sink, and shower in a single wet zone with a curbless, doorless enclosure to eliminate wasted area
- Opt for a pedestal or floating vanity sink instead of a bulky cabinet
- Recess the medicine cabinet and other storage into the wall cavity
- Use a pocket door or barn door that slides rather than swings open
Even small bathrooms can live large with a little design ingenuity.
Space | Minimum Dimensions | Tight Layout |
---|---|---|
Full bath with tub | 5′ x 7′ | 40-45 sq. ft. |
Full bath with standalone shower | 4′ x 6′ | 30-35 sq. ft. |
Half bath (powder room) | 3′ x 5′ | 15-20 sq. ft. |
How Do Bathroom Additions Impact Existing Plumbing in Appleton?
Adding a bathroom usually means tying new supply and drain lines into your home’s existing plumbing.
In some cases, your Appleton bathroom remodeling contractor can simply extend the lines from a nearby bathroom or kitchen.
But larger homes may require running new lines or even updating old piping to meet the added demand.
Some key considerations:
- Ensuring adequate water pressure and drainage slope for the new bathroom
- Updating old galvanized or lead pipes to modern PEX or copper
- Moving the water heater or upgrading to a bigger tank to supply the addition
- Determining if you’ll need a sewage ejector pump for a basement bathroom
Before construction begins, your contractor will assess your home’s current plumbing and create a plan to efficiently integrate the new bathroom.
Permits and Inspections for Bathroom Additions
As with any major home renovation, bathroom additions in Appleton require proper permits and inspections.
Your contractor will handle this process, but here’s what to expect:
- Submitting plans and applying for a building permit with the city
- Rough-in inspections for plumbing, electrical, and framing before drywall is installed
- Final inspections once the project is complete to close out the permit
- Keeping detailed records of all permits and inspections for future reference
Skipping permits may seem tempting, but it’s not worth the risk.
Work done without a permit could result in fines, legal issues, and problems when you eventually sell your home.
Hire a licensed Appleton bath contractor who will keep your project on the right side of regulations.
Permit Type | When Required | Typical Cost |
---|---|---|
Building Permit | Any structural changes | $200-$500 |
Electrical Permit | Adding or modifying wiring | $50-$100 |
Plumbing Permit | Installing new fixtures or drains | $50-$200 |
Appleton Bathroom Addition Contractors Creating Dream Spaces That Last
No matter the shape or size of your dream bathroom, hiring experienced Appleton bathroom remodeling contractors is the key to achieving stunning results.
Kelly McCarthy Builders offers unmatched craftsmanship, communication, and customer service from initial design through final cleanup.
As a licensed, insured contractor with deep roots in the Appleton community, Kelly provides:
- Detailed project estimates with transparent pricing
- 3D renderings to visualize your new bathroom before construction begins
- Proven waterproofing techniques to protect your investment
- Creative space planning solutions to make the most of your square footage
- Assistance in selecting beautiful, durable finishes that fit your budget and style
- Professional project management to keep your remodel on schedule
- High-quality construction backed by a 5-year craftmanship warranty
With Kelly McCarthy Builders, you can trust your dream bathroom is in capable hands every step of the way.
Why We Think Appleton Bathroom Additions Are Worth the Investment
Adding a bathroom offers one of the best returns on investment for Appleton homeowners.
You’ll gain value in both resale price and everyday livability.
The average bathroom addition recoups 50-60% of its cost in added home value, according to Remodeling Magazine’s Cost vs. Value report.
But more importantly, you’ll enjoy the benefits of the extra bathroom for as long as you live in the home:
- More convenience for large families or frequent guests
- Less congestion during the morning rush or bedtime routine
- Flexibility to age in place with a main-level bathroom
- Improved storage space for toiletries and linens
- A spa-like retreat to unwind after a long day
And if you work with skilled Appleton bathroom addition contractors like Kelly McCarthy Builders, the enhanced function and beauty of your home will last for decades.
Bathroom Addition | Average Cost | Average Resale Value |
---|---|---|
Midrange | $49,598 | $26,807 |
Upscale | $91,287 | $49,961 |
Universal Design | $38,813 | $22,494 |

FAQs
What is the cost of adding a bathroom in Appleton, WI?
Bathroom addition costs in Appleton vary widely depending on size and scope, but you can expect a basic full bathroom addition to start around $25,000. Larger or upscale additions could reach $75,000 or more.
How do Appleton bathroom addition contractors handle waterproofing?
Appleton contractors use proven waterproofing strategies like moisture barriers, proper drainage, mold-resistant materials, and adequate ventilation to prevent leaks and water damage in your new bathroom.
Can a bathroom addition fit in limited space in Appleton homes?
Yes, a skilled Appleton bathroom remodeler can find creative ways to integrate even a small addition without it feeling cramped. Repurposing closets, using curbless showers, and optimizing storage are a few common techniques.
How does a bathroom addition impact existing plumbing in older Appleton houses?
Your contractor will assess your current plumbing and create a plan to tie in new supply and drain lines. This may involve updating old pipes, ensuring proper pressure and drainage, or even relocating fixtures.
What permits and inspections are required for bathroom additions in Appleton, WI?
Most bathroom additions need a building permit, electrical permit, and plumbing permit. The city will inspect the rough-ins and finished space to ensure everything is up to code. Your licensed Appleton contractor will handle all the paperwork and compliance.