Design-Build Home Additions · Southeastern Wisconsin
Home Additions in Waukesha, WI
The room your
house was missing.
house was missing.
Your kitchen should make daily life easier, not harder. We design and build home-additions around how your family actually cooks, gathers, and moves, then handle every trade under one roof.
Rooflines and finishes matched to the existing house
Cambria quartz as a Premier Dealer
One team from layout to final install
Most home additions run 8 to 16 weeks once construction starts
★★★★★4.8 rated by homeowners on Google
Start Your Addition
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Serving Waukesha, Wisconsin
Your Waukesha home additions team
Waukesha is a regular part of our schedule. Our design showroom and office sit at 2345 S Commerce Dr, in New Berlin, an easy drive from Waukesha, and it's where every addition on this page started: a walk-through, a set of Chief Architect drawings, and a fixed-price contract before a single footing was poured. Being local means faster site visits, a showroom you can walk into without driving across the metro, and a crew that already knows the permitting process in Waukesha.
Seamless By Design
Additions that look like they were always part of the house
The difference between an addition and a great addition is how it meets the existing structure. We design rooflines, siding, and interior flow so the new space blends perfectly, visually and functionally.
From foundation to finishing details, every element is handled by one accountable team: design, engineering, permits, zoning, and construction.
Second-story additions that double space without losing yard
Kitchen and bathroom expansions that transform daily routines
Sunrooms with proper insulation and year-round climate control
In-law suites and guest apartments with independent living space
What Goes Into It
Key elements of your new addition
Room Additions
Extra bedrooms, guest suites, and extended living areas that feel cohesive with your existing home.
Second Stories
Complex planning, engineering, and structural work to safely add an upper level.
Sunrooms & Porches
Bright, insulated spaces for relaxing and entertaining in every season.
Primary Suites
Privacy and comfort with custom closets and spa-style bathrooms.
In-Law Suites
Independent, comfortable living areas for family and long-term guests.
Mudrooms & Utility
Convenience and organization for busy households, built where you need it.
Recent Work
Start YoursRecent projects
Our Process
Here's how it works
Fixed-price contract, Chief Architect renderings, and a communication plan you can set your watch to.
01
Meet the Experts
A consultation with our design-build team. We listen first, then walk your space and talk goals, scope, and budget honestly.
02
Personalize Your Design
A 3D design of your new space with real selections, so you see exactly what you are getting before construction starts.
03
Remodel Your Home
Our crew gets to work with daily cleanup, HEPA dust control, and a dedicated project lead who keeps you in the loop.
Homeowner Stories
Trusted by homeowners just like you
★★★★★4.8 on Google
★★★★★
"Advantage did a complete remodel of our kitchen and powder room. We absolutely love it! Andy and the staff were easy to work with, professional, and accommodating to our needs. I would highly recommend them for any job big or small."
Carol B.
★★★★★
"Greg and Andy saw us through our kitchen and master bath remodel. They were professional yet fun and kept us in the loop through the whole process. When problems arose, like a leak in our chimney or uneven floors, they handled it well and the project moved on!"
Kirsten O.Menomonee Falls, Wisconsin
Common Questions
Addition remodeling questions
How long does an addition remodel take?+
Most home additions run 8 to 16 weeks once construction starts. The timeline accounts for ordering and lead times, plus key milestones with updates throughout.
Will I know what my addition will look like before construction?+
Yes. You review Chief Architect drawings and 3D renderings during design and development, and key decisions are finalized before the job starts.
Who handles permits, plumbing, and electrical?+
We do. As a design-build firm, you will not need to hire a designer, architect, general contractor, plumber, or electrician separately. One team, one point of contact.
Can I stay in my home during the remodel?+
Almost all of our clients do. We set containment, floor protection, and daily cleanup standards, and use HEPA air filtration to manage dust.
Get Started
Ready for an addition you love?
Book your consultation. We'll talk through your space, your budget, and what's possible, and you'll leave with a clear next step either way.